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free encyclopedia</div> </div> <div id="contentSub"><div id="mw-content-subtitle"></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="en" dir="ltr"><div class="shortdescription nomobile noexcerpt noprint searchaux" style="display:none">Most common type of heat pump</div> <style data-mw-deduplicate="TemplateStyles:r1236090951">.mw-parser-output .hatnote{font-style:italic}.mw-parser-output div.hatnote{padding-left:1.6em;margin-bottom:0.5em}.mw-parser-output .hatnote i{font-style:normal}.mw-parser-output .hatnote+link+.hatnote{margin-top:-0.5em}@media print{body.ns-0 .mw-parser-output .hatnote{display:none!important}}</style><div role="note" class="hatnote navigation-not-searchable">This article is about details of the most common type of <a href="/wiki/Heat_pump" title="Heat pump">heat pump</a>. For more general information, see <a href="/wiki/Heat_pump" title="Heat pump">heat pump</a>.</div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Heat_pump_on_balcony.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/1/10/Heat_pump_on_balcony.jpg/220px-Heat_pump_on_balcony.jpg" decoding="async" width="220" height="220" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/1/10/Heat_pump_on_balcony.jpg/330px-Heat_pump_on_balcony.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/1/10/Heat_pump_on_balcony.jpg/440px-Heat_pump_on_balcony.jpg 2x" data-file-width="2995" data-file-height="2995" /></a><figcaption><a href="/wiki/Heat_pump" title="Heat pump">Heat pump</a> on balcony of apartment</figcaption></figure> An air source heat pump (ASHP) is a heat pump that can absorb heat from air outside a building and release it inside; it uses the same <a href="/wiki/Vapor-compression_refrigeration" title="Vapor-compression refrigeration">vapor-compression refrigeration</a> process and much the same equipment as an <a href="/wiki/Air_conditioning" title="Air conditioning">air conditioner</a>, but in the opposite direction. ASHPs are the most common type of heat pump and, usually being smaller, tend to be used to heat individual houses or flats rather than blocks, districts or industrial processes.<a href="#cite_note-:9-1">[1]</a><a href="#cite_note-2">[2]</a> Air-to-air heat pumps provide hot or cold air directly to rooms, but do not usually provide hot water. Air-to-water heat pumps use <a href="/wiki/Radiator_(heating)" title="Radiator (heating)">radiators</a> or <a href="/wiki/Underfloor_heating" title="Underfloor heating">underfloor heating</a> to heat a whole house and are often also used to provide <a href="/wiki/Domestic_hot_water" class="mw-redirect" title="Domestic hot water">domestic hot water</a>. An ASHP can typically gain 4 kWh thermal energy from 1 kWh electric energy. They are optimized for flow temperatures between 30 and 40 °C (86 and 104 °F), suitable for buildings with heat emitters sized for low flow temperatures. With losses in efficiency, an ASHP can even provide full central heating with a flow temperature up to 80 °C (176 °F).<a href="#cite_note-3">[3]</a> As of 2023<a class="external text" href="https://en.wikipedia.org/w/index.php?title=Air_source_heat_pump&action=edit">[update]</a> about 10% of building heating worldwide is from ASHPs. They are the main way to <a href="/wiki/Phase-out_of_gas_boilers" class="mw-redirect" title="Phase-out of gas boilers">phase out gas boilers</a> (also known as "furnaces") from houses, to avoid their <a href="/wiki/Greenhouse_gas_emissions" title="Greenhouse gas emissions">greenhouse gas emissions</a>.<a href="#cite_note-:0-4">[4]</a> Air-source heat pumps are used to move heat between two heat exchangers, one outside the building which is fitted with fins through which air is forced using a fan and the other which either directly heats the air inside the building or heats water which is then circulated around the building through radiators or underfloor heating which releases the heat to the building. These devices can also operate in a cooling mode where they extract heat via the internal heat exchanger and eject it into the ambient air using the external heat exchanger. Some can be used to heat water for washing which is stored in a domestic hot water tank.<a href="#cite_note-5">[5]</a> Air-source heat pumps are relatively easy and inexpensive to install, so are the most widely used type. In mild weather, <a href="/wiki/Coefficient_of_performance" title="Coefficient of performance">coefficient of performance</a> (COP) may be between 2 and 5, while at temperatures below around −8 °C (18 °F) an air-source heat pump may still achieve a COP of 1 to 4.<a href="#cite_note-6">[6]</a> While older air-source heat pumps performed relatively poorly at low temperatures and were better suited for warm climates, newer models with variable-speed compressors remain highly efficient in freezing conditions allowing for wide adoption and cost savings in places like Minnesota and Maine in the United States.<a href="#cite_note-7">[7]</a> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Technology">Technology</h2>[<a href="/w/index.php?title=Air_source_heat_pump&action=edit&section=1" title="Edit section: Technology">edit</a>]</div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Outunit_of_heat_pump.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/9/94/Outunit_of_heat_pump.jpg/220px-Outunit_of_heat_pump.jpg" decoding="async" width="220" height="293" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/9/94/Outunit_of_heat_pump.jpg/330px-Outunit_of_heat_pump.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/9/94/Outunit_of_heat_pump.jpg/440px-Outunit_of_heat_pump.jpg 2x" data-file-width="2112" data-file-height="2816" /></a><figcaption>Air source heat pump</figcaption></figure> <a href="/wiki/Air" class="mw-redirect" title="Air">Air</a> at any natural temperature contains some heat. An air source heat pump transfers some of this from one place to another, for example between the outside and inside of a building. An air-to air system can be designed to transfer heat in either direction, to heat or cool the interior of the building in winter and summer respectively. Internal ducting may be used to distribute the air.<a href="#cite_note-:1-8">[8]</a> An air-to-water system only pumps heat inwards, and can provide space heating and hot water.<a href="#cite_note-9">[9]</a> For simplicity, the description below focuses on use for interior heating. The technology is similar to a refrigerator or freezer or air conditioning unit: the different effect is due to the location of the different system components. Just as the pipes on the back of a refrigerator become warm as the interior cools, so an ASHP warms the inside of a building whilst cooling the outside air. The main components of a split-system (called split as there are both inside and outside coils) air source heat pump are: <ul><li>An outdoor evaporator <a href="/wiki/Heat_exchanger" title="Heat exchanger">heat exchanger</a> coil, which extracts heat from ambient air</li> <li>One or more<a href="#cite_note-10">[10]</a> indoor <a href="/wiki/Condenser_(heat_transfer)" title="Condenser (heat transfer)">condenser</a> heat exchanger coils. They transfer the heat into the indoor air, or an indoor heating system such as water-filled radiators or underfloor circuits and a domestic hot water tank.</li></ul> Less commonly a packaged ASHP has everything outside, with hot (or cold) air sent inside through a duct.<a href="#cite_note-11">[11]</a> These are also called monobloc and are useful for keeping flammable propane outside the house.<a href="#cite_note-:0-4">[4]</a> An ASHP can provide three or four times as much heat as an electric resistance heater using the same amount of electricity.<a href="#cite_note-:5-12">[12]</a> Burning gas or oil will emit carbon dioxide and also <a href="/wiki/NOx" title="NOx">NOx</a>, which can be harmful to health.<a href="#cite_note-GBN_1-13">[13]</a> An air source heat pump issues no carbon dioxide, nitrogen oxide or any other kind of gas. It uses a small amount of electricity to transfer a large amount of heat. Most ASHPs are reversible and are able to either warm or cool buildings<a href="#cite_note-14">[14]</a> and in some cases also provide <a href="/wiki/Water_heating" title="Water heating">domestic hot water</a>. The use of an air-to-water heat pump for house cooling has been criticised.<a href="#cite_note-15">[15]</a> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Ecodan_outdoor_unit_Internal_view.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/6/6b/Ecodan_outdoor_unit_Internal_view.jpg/220px-Ecodan_outdoor_unit_Internal_view.jpg" decoding="async" width="220" height="293" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/6/6b/Ecodan_outdoor_unit_Internal_view.jpg/330px-Ecodan_outdoor_unit_Internal_view.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/6/6b/Ecodan_outdoor_unit_Internal_view.jpg/440px-Ecodan_outdoor_unit_Internal_view.jpg 2x" data-file-width="3024" data-file-height="4032" /></a><figcaption>An internal view of the outdoor unit of an air source heat pump</figcaption></figure> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Refrigerator-cycle.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/6/6b/Refrigerator-cycle.svg/220px-Refrigerator-cycle.svg.png" decoding="async" width="220" height="156" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/6/6b/Refrigerator-cycle.svg/330px-Refrigerator-cycle.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/6/6b/Refrigerator-cycle.svg/440px-Refrigerator-cycle.svg.png 2x" data-file-width="650" data-file-height="460" /></a><figcaption>A: indoor compartment, B: outdoor compartment, I: insulation, 1: condenser, 2: expansion valve, 3: evaporator, 4: compressor</figcaption></figure> Heating and cooling is accomplished by pumping a <a href="/wiki/Refrigerant" title="Refrigerant">refrigerant</a> through the heat pump's indoor and outdoor coils. Like in a refrigerator, a <a href="/wiki/Gas_compressor" class="mw-redirect" title="Gas compressor">compressor</a>, <a href="/wiki/Condenser_(heat_transfer)" title="Condenser (heat transfer)">condenser</a>, <a href="/wiki/Expansion_valve_(steam_engine)" title="Expansion valve (steam engine)">expansion valve</a> and <a href="/wiki/Evaporator" title="Evaporator">evaporator</a> are used to change states of the refrigerant between colder <a href="/wiki/Liquid" title="Liquid">liquid</a> and hotter <a href="/wiki/Gas" title="Gas">gas</a> states. When the liquid refrigerant at a low <a href="/wiki/Temperature" title="Temperature">temperature</a> and low pressure passes through the outdoor heat exchanger coils, ambient heat causes the liquid to boil (change to gas or <a href="/wiki/Vapor" title="Vapor">vapor</a>). Heat energy from the outside air has been absorbed and stored in the refrigerant as <a href="/wiki/Latent_heat" title="Latent heat">latent heat</a>. The gas is then compressed using an electric pump; the <a href="/wiki/Ideal_gas_law" title="Ideal gas law">compression increases the temperature of the gas</a>. Inside the building, the gas passes through a pressure <a href="/wiki/Valve" title="Valve">valve</a> into heat exchanger coils. There, the hot refrigerant gas condenses back to a liquid and transfers the stored <a href="/wiki/Latent_heat" title="Latent heat">latent heat</a> to the indoor air, water heating or hot water system. The indoor air or heating water is pumped across the heat exchanger by an electric pump or <a href="/wiki/Fan_(mechanical)" class="mw-redirect" title="Fan (mechanical)">fan</a>. The cool liquid refrigerant then re-enters the outdoor heat exchanger coils to begin a new cycle. Each cycle usually takes a few minutes.<a href="#cite_note-:5-12">[12]</a> Most heat pumps can also operate in a cooling mode where the cold refrigerant is moved through the indoor coils to cool the room air. As of 2024 tech other than vapour compression is insignificant in the market.<a href="#cite_note-16">[16]</a> <div class="mw-heading mw-heading2"><h2 id="Usage">Usage</h2>[<a href="/w/index.php?title=Air_source_heat_pump&action=edit&section=2" title="Edit section: Usage">edit</a>]</div> ASHPs are the most common type of heat pump and, usually being smaller, are generally more suitable to heat individual houses rather than blocks of flats, compact urban districts or industrial processes.<a href="#cite_note-:9-1">[1]</a> In dense city centres heat networks may be better than ASHP.<a href="#cite_note-:9-1">[1]</a> Air source heat pumps are used to provide interior space heating and cooling even in colder climates, and can be used efficiently for water heating in milder climates. A major advantage of some ASHPs is that the same system may be used for heating in winter and cooling in summer. Though the cost of installation is generally high, it is less than the cost of a <a href="/wiki/Geothermal_heat_pump" class="mw-redirect" title="Geothermal heat pump">ground source heat pump</a>, because a ground source heat pump requires excavation to install its ground loop. The advantage of a ground source heat pump is that it has access to the thermal storage capacity of the ground which allows it to produce more heat for less electricity in cold conditions. Home batteries can mitigate the risk of power cuts and like ASHPs are becoming more popular.<a href="#cite_note-17">[17]</a> Some ASHPs can be coupled to <a href="/wiki/Solar_panel" title="Solar panel">solar panels</a> as primary energy source, with a conventional electric grid as backup source.[<a href="/wiki/Wikipedia:Citation_needed" title="Wikipedia:Citation needed">citation needed</a>] <a href="/wiki/Thermal_energy_storage" title="Thermal energy storage">Thermal storage</a> solutions incorporating resistance heating can be used in conjunction with ASHPs. Storage may be more cost-effective if time of use electricity rates are available. Heat is stored in high density ceramic bricks contained within a thermally-insulated enclosure;<a href="#cite_note-18">[18]</a> <a href="/wiki/Storage_heater" title="Storage heater">storage heaters</a> are an example. ASHPs may also be paired with <a href="/wiki/Passive_solar_heating" class="mw-redirect" title="Passive solar heating">passive solar heating</a>. Thermal mass (such as concrete or rocks) heated by passive solar heat can help stabilize indoor temperatures, absorbing heat during the day and releasing heat at night, when outdoor temperatures are colder and heat pump efficiency is lower. <div class="mw-heading mw-heading3"><h3 id="Replacing_gas_heating_in_existing_houses">Replacing gas heating in existing houses</h3>[<a href="/w/index.php?title=Air_source_heat_pump&action=edit&section=3" title="Edit section: Replacing gas heating in existing houses">edit</a>]</div> Good <a href="/wiki/Home_insulation" class="mw-redirect" title="Home insulation">home insulation</a> is important.<a href="#cite_note-:10-19">[19]</a> As of 2023<a class="external text" href="https://en.wikipedia.org/w/index.php?title=Air_source_heat_pump&action=edit">[update]</a> ASHPs are bigger than gas boilers and need more space outside, so the process is more complex and can be more expensive than if it was possible to just remove a gas boiler and install an ASHP in its place.<a href="#cite_note-:0-4">[4]</a><a href="#cite_note-:4-20">[20]</a> If running costs are important choosing the right size is important because an ASHP which is too large will be more expensive to run.<a href="#cite_note-21">[21]</a> It can be more complicated to retrofit conventional heating systems that use radiators/<a href="/wiki/Radiant_heating_and_cooling" title="Radiant heating and cooling">radiant panels</a>, hot water <a href="/wiki/Baseboard" title="Baseboard">baseboard</a> heaters, or even smaller diameter ducting, with ASHP-sourced heat. The lower heat pump output temperatures means radiators (and possibly pipes) may have to be replaced with larger sizes, or a low temperature <a href="/wiki/Underfloor_heating" title="Underfloor heating">underfloor heating</a> system installed instead.<a href="#cite_note-22">[22]</a> Alternatively, a high temperature heat pump can be installed and existing heat emitters can be retained, however as of 2023<a class="external text" href="https://en.wikipedia.org/w/index.php?title=Air_source_heat_pump&action=edit">[update]</a> these heat pumps are more expensive to buy and run so may only be suitable for buildings which are hard to alter or insulate, such as some large historic houses.<a href="#cite_note-23">[23]</a> ASHP are claimed to be healthier than fossil-fuelled heating such as <a href="/wiki/Gas_heater" title="Gas heater">gas heaters</a> by maintaining a more even temperature and avoiding harmful fumes risk.<a href="#cite_note-:10-19">[19]</a> By filtering the air and reducing humidity in hot humid summer climates, they are also said to reduce dust, <a href="/wiki/Allergen" title="Allergen">allergens</a>, and <a href="/wiki/Mold" title="Mold">mold</a>, which poses a health risk.<a href="#cite_note-:11-24">[24]</a> <div class="mw-heading mw-heading3"><h3 id="In_cold_climates">In cold climates</h3>[<a href="/w/index.php?title=Air_source_heat_pump&action=edit&section=4" title="Edit section: In cold climates">edit</a>]</div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Ecodan_outdoor_unit_in_the_snow.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/e/e2/Ecodan_outdoor_unit_in_the_snow.jpg/220px-Ecodan_outdoor_unit_in_the_snow.jpg" decoding="async" width="220" height="126" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/e/e2/Ecodan_outdoor_unit_in_the_snow.jpg/330px-Ecodan_outdoor_unit_in_the_snow.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/e/e2/Ecodan_outdoor_unit_in_the_snow.jpg/440px-Ecodan_outdoor_unit_in_the_snow.jpg 2x" data-file-width="2784" data-file-height="1590" /></a><figcaption>The outdoor unit of an air source heat pump operating in freezing conditions</figcaption></figure> Operation of normal ASHPs is generally not recommended below −10 °C.<a href="#cite_note-:3-25">[25]</a> However, ASHPs designed specifically for very cold climates (in the US, these are certified under Energy Star<a href="#cite_note-:2-26">[26]</a>) can extract useful heat from ambient air as cold as −30 °C (−22 °F) but electric resistance heating may be more efficient below −25 °C.<a href="#cite_note-:3-25">[25]</a> This is made possible by the use of variable-speed compressors, powered by inverters.<a href="#cite_note-:2-26">[26]</a> Although air source heat pumps are less efficient than well-installed <a href="/wiki/Ground_source_heat_pump" title="Ground source heat pump">ground source heat pumps</a> (GSHPs) in cold conditions, air source heat pumps have lower initial costs and may be the most economic or practical choice.<a href="#cite_note-27">[27]</a> A hybrid system, with both a heat pump and an alternative source of heat such as a fossil fuel boiler, may be suitable if it is impractical to properly insulate a large house.<a href="#cite_note-:8-28">[28]</a> Alternatively multiple heat pumps or a high temperature heat pump may be considered.<a href="#cite_note-:8-28">[28]</a> In some weather conditions condensation will form and then freeze onto the coils of the heat exchanger of the outdoor unit, reducing air flow through the coils. To clear this condensation, the unit operates a defrost cycle, switching to cooling mode for a few minutes and heating the coils until the ice melts. Air-to-water heat pumps use heat from the circulating water for this purpose, which results in a small and probably undetectable drop in water temperature;<a href="#cite_note-29">[29]</a> for air-to-air systems, heat is either taken from the air in the building or using an electrical heater.<a href="#cite_note-30">[30]</a> Some air-to-air systems simply stop the operation of the fans of both units and switch to cooling mode so that the outdoor unit returns to being the condenser such that it heats up and defrosts. As discussed above, typical air-source heat pumps (ASHPs) struggle to perform efficiently at low temperatures. Ground-source heat pumps (GSHPs), which transfer heat to or from the ground using fluid-filled underground pipes (ground heat exchangers or GHEs),<a href="#cite_note-31">[31]</a> offer higher efficiency but are expensive to install due to labor and material costs.<a href="#cite_note-:12-32">[32]</a> A ground source air heat pump (GSAHP)—or water-to-refrigerant type GSHPs <a href="#cite_note-:13-33">[33]</a>—presents a viable alternative, integrating elements of ASHPs and water-to-water GSHPs. A GSAHP has three components: a GHE (vertical or horizontal), a heat pump, and a fan coil unit (FCU). The heat pump unit contains an evaporator, compressor, condenser, and expansion valve.<a href="#cite_note-34">[34]</a> Thermal energy is extracted from the ground through an antifreeze solution in the GHE, transferred to the refrigerant in the heat pump, and compressed before being delivered to a refrigerant-to-air heat exchanger. A fan then circulates the heated air indoors. Unlike conventional GSHPs, GSAHPs eliminate the need for hydronic systems (e.g., underfloor heating systems or wall-mounted radiators), relying instead on fans to distribute heat directly into indoor air. This reduces installation costs and complexity while retaining the efficiency benefits of GSHPs in cold climates. By extracting heat from stable ground temperatures, GSAHPs outperform ASHPs in low temperatures, achieving higher efficiency and reduced greenhouse gas emissions. Installation costs for GSAHPs are intermediate between ASHP and GSHP systems; while they eliminate the need for indoor pipework, they still require drilling or digging for the GHE. Electricity consumption drives the climate impact of heat pump systems. GSAHPs demonstrate a coefficient of performance (COP) approximately 35% higher than ASHPs under certain conditions,<a href="#cite_note-:13-33">[33]</a> due to the stable ground temperatures they leverage. Additionally, the operation phase accounts for 84% of its climate impacts over a heat pump’s life cycle,<a href="#cite_note-35">[35]</a> highlighting the importance of efficiency (i.e., higher COPs) in reducing emissions. The global warming potential (GWP) of GSAHPs is nearly 40% lower than ASHPs,<a href="#cite_note-:12-32">[32]</a> further demonstrating their environmental advantages in cold climates. This efficiency advantage is especially pronounced during winter when ASHP efficiency typically declines. GSAHPs consume less electricity for heating, resulting in lower greenhouse gas emissions, particularly in regions with high heating demands and carbon-intensive electricity grids. <div class="mw-heading mw-heading3"><h3 id="Noise">Noise</h3>[<a href="/w/index.php?title=Air_source_heat_pump&action=edit&section=5" title="Edit section: Noise">edit</a>]</div> An air source heat pump requires an outdoor unit containing moving mechanical components including fans which produce noise. Modern devices offer schedules for silent mode operation with reduced fan speed. This will reduce the maximum heating power but can be applied at mild outdoor temperatures without efficiency loss. Acoustic enclosures are another approach to reduce the noise in a sensitive neighbourhood. In insulated buildings, operation can be paused at night without significant temperature loss. Only at low temperatures, frost protection forces operation after a few hours. Proper siting is also important.<a href="#cite_note-36">[36]</a> In the United States, the allowed night-time noise level is 45 <a href="/wiki/A-weighting" title="A-weighting">A-weighted decibels (dBA)</a>.<a href="#cite_note-37">[37]</a> In the UK the limit is set at 42 dB measured from the nearest neighbour<a href="#cite_note-38">[38]</a> according to the MCS 020 standard<a href="#cite_note-39">[39]</a> or equivalent.<a href="#cite_note-40">[40]</a> In Germany the limit in residential areas is 35, which is usually measured by <a href="/wiki/European_Committee_for_Standardization" title="European Committee for Standardization">European Standard</a> EN 12102.<a href="#cite_note-41">[41]</a> Another feature of air source heat pumps (ASHPs) external heat exchangers is their need to stop the fan from time to time for a period of several minutes in order to get rid of frost that accumulates in the outdoor unit in the heating mode. After that, the heat pump starts to work again. This part of the work cycle results in two sudden changes of the noise made by the fan. The acoustic effect of such disruption is especially powerful in quiet environments where background night-time noise may be as low as 0 to 10dBA. This is included in legislation in France. According to the French concept of noise nuisance, "noise emergence" is the difference between ambient noise including the disturbing noise, and ambient noise without the disturbing noise.<a href="#cite_note-42">[42]</a><a href="#cite_note-43">[43]</a> By contrast a ground source heat pump has no need for an outdoor unit with moving mechanical components. <div class="mw-heading mw-heading2"><h2 id="Efficiency_ratings">Efficiency ratings</h2>[<a href="/w/index.php?title=Air_source_heat_pump&action=edit&section=6" title="Edit section: Efficiency ratings">edit</a>]</div> The efficiency of air source heat pumps is measured by the <a href="/wiki/Coefficient_of_performance" title="Coefficient of performance">coefficient of performance</a> (COP). A COP of 4 means the heat pump produces 4 units of heat energy for every 1 unit of electricity it consumes. Within temperature ranges of −3 °C (27 °F) to 10 °C (50 °F), the COP for many machines is fairly stable. Approximately TheoreticalMaxCOP = (desiredIndoorTempC + 273) ÷ (desiredIndoorTempC - outsideTempC).[<a href="/wiki/Wikipedia:Citation_needed" title="Wikipedia:Citation needed">citation needed</a>]<a href="#cite_note-44">[44]</a>[<a href="/wiki/Wikipedia:NOTRS" class="mw-redirect" title="Wikipedia:NOTRS">better source needed</a>] In mild weather with an outside temperature of 10 °C (50 °F), the COP of efficient air source heat pumps ranges from 4 to 6.<a href="#cite_note-45">[45]</a> However, on a cold winter day, it takes more work to move the same amount of heat indoors than on a mild day.<a href="#cite_note-EH_1-46">[46]</a> The heat pump's performance is limited by the <a href="/wiki/Carnot_cycle" title="Carnot cycle">Carnot cycle</a> and will approach 1.0 as the outdoor-to-indoor temperature difference increases, which for most air source heat pumps happens as outdoor temperatures approach −18 °C (0 °F).[<a href="/wiki/Wikipedia:Citation_needed" title="Wikipedia:Citation needed">citation needed</a>]Heat pump construction that enables carbon dioxide as a refrigerant may have a COP of greater than 2 even down to −20 °C, pushing the break-even figure downward to −30 °C (−22 °F).[<a href="/wiki/Wikipedia:Citation_needed" title="Wikipedia:Citation needed">citation needed</a>] A <a href="/wiki/Ground_source_heat_pump" title="Ground source heat pump">ground source heat pump</a> has comparatively less of a change in COP as outdoor temperatures change, because the ground from which they extract heat has a more constant temperature than outdoor air. The design of a heat pump has a considerable impact on its efficiency. Many air source heat pumps are designed primarily as <a href="/wiki/Air_conditioning_unit" class="mw-redirect" title="Air conditioning unit">air conditioning units</a>, mainly for use in summer temperatures. Designing a heat pump specifically for the purpose of heat exchange can attain greater COP and an extended life cycle. The principal changes are in the scale and type of compressor and evaporator. Seasonally adjusted heating and cooling efficiencies are given by the <a href="/wiki/Heating_seasonal_performance_factor" title="Heating seasonal performance factor">heating seasonal performance factor</a> (HSPF) and <a href="/wiki/Seasonal_energy_efficiency_ratio" title="Seasonal energy efficiency ratio">seasonal energy efficiency ratio</a> (SEER) respectively. In the US the legal minimum efficiency is 14 or 15 SEER and 8.8 HSPF.<a href="#cite_note-:2-26">[26]</a> Variable speed compressors are more efficient because they can often run more slowly and because the air passes through more slowly giving its water more time to condense, thus more efficient as drier air is easier to cool. However, they are more expensive and more likely to need maintenance or replacement.<a href="#cite_note-:11-24">[24]</a> Maintenance such as changing filters can improve performance by 10% to 25%.<a href="#cite_note-47">[47]</a> <div class="mw-heading mw-heading2"><h2 id="Refrigerant_types">Refrigerant types</h2>[<a href="/w/index.php?title=Air_source_heat_pump&action=edit&section=7" title="Edit section: Refrigerant types">edit</a>]</div> <div class="excerpt-block"><style data-mw-deduplicate="TemplateStyles:r1066933788">.mw-parser-output .excerpt-hat .mw-editsection-like{font-style:normal}</style><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable dablink excerpt-hat selfref">This section is an excerpt from <a href="/wiki/Heat_pump#Refrigerant_choice" title="Heat pump">Heat pump § Refrigerant choice</a>.[<a class="external text" href="https://en.wikipedia.org/w/index.php?title=Heat_pump&action=edit#Refrigerant_choice">edit</a>]</div><div class="excerpt"> Pure refrigerants can be divided into organic substances (<a href="/wiki/Hydrocarbons" class="mw-redirect" title="Hydrocarbons">hydrocarbons</a> (HCs), <a href="/wiki/Chlorofluorocarbons" class="mw-redirect" title="Chlorofluorocarbons">chlorofluorocarbons</a> (CFCs), <a href="/wiki/Hydrochlorofluorocarbons" class="mw-redirect" title="Hydrochlorofluorocarbons">hydrochlorofluorocarbons</a> (HCFCs), <a href="/wiki/Hydrofluorocarbons" class="mw-redirect" title="Hydrofluorocarbons">hydrofluorocarbons</a> (HFCs), <a href="/wiki/Hydrofluoroolefins" class="mw-redirect" title="Hydrofluoroolefins">hydrofluoroolefins</a> (HFOs), and HCFOs), and inorganic substances (<a href="/wiki/Ammonia" title="Ammonia">ammonia</a> (NH 3), <a href="/wiki/Carbon_dioxide" title="Carbon dioxide">carbon dioxide</a> (CO 2), and <a href="/wiki/Water" title="Water">water</a> (H 2O)<a href="#cite_note-48">[48]</a>).<a href="#cite_note-49">[49]</a> Their boiling points are usually below −25 °C.<a href="#cite_note-50">[50]</a> In the past 200 years, the standards and requirements for new refrigerants have changed. Nowadays low <a href="/wiki/Global_warming_potential" title="Global warming potential">global warming potential</a> (GWP) is required, in addition to all the previous requirements for safety, practicality, material compatibility, appropriate atmospheric life,[<a href="/wiki/Wikipedia:Please_clarify" title="Wikipedia:Please clarify">clarification needed</a>] and compatibility with high-efficiency products. By 2022, devices using refrigerants with a very low GWP still have a small market share but are expected to play an increasing role due to enforced regulations,<a href="#cite_note-51">[51]</a> as most countries have now ratified the <a href="/wiki/Kigali_Amendment" title="Kigali Amendment">Kigali Amendment</a> to ban HFCs.<a href="#cite_note-52">[52]</a> <a href="/wiki/Isobutane" title="Isobutane">Isobutane (R600A)</a> and <a href="/wiki/Propane" title="Propane">propane (R290)</a> are far less harmful to the environment than conventional hydrofluorocarbons (HFC) and are already being used in air-source heat pumps.<a href="#cite_note-53">[53]</a> Propane may be the most suitable for high temperature heat pumps.<a href="#cite_note-Heat_pump_:2-54">[54]</a> Ammonia (R717) and carbon dioxide (<a href="/wiki/Carbon_dioxide#Refrigerant" title="Carbon dioxide">R-744</a>) also have a low GWP. As of 2023<a class="external text" href="https://en.wikipedia.org/w/index.php?title=Air_source_heat_pump&action=edit">[update]</a> smaller CO 2 heat pumps are not widely available and research and development of them continues.<a href="#cite_note-55">[55]</a> A 2024 report said that refrigerants with GWP are vulnerable to further international restrictions.<a href="#cite_note-56">[56]</a> Until the 1990s, heat pumps, along with fridges and other related products used <a href="/wiki/Chlorofluorocarbon" title="Chlorofluorocarbon">chlorofluorocarbons</a> (CFCs) as refrigerants, which caused major damage to the <a href="/wiki/Ozone_layer" title="Ozone layer">ozone layer</a> when released into the <a href="/wiki/Earth%27s_atmosphere" class="mw-redirect" title="Earth's atmosphere">atmosphere</a>. Use of these chemicals was banned or severely restricted by the <a href="/wiki/Montreal_Protocol" title="Montreal Protocol">Montreal Protocol</a> of August 1987.<a href="#cite_note-57">[57]</a> Replacements, including <a href="/wiki/R-134a" class="mw-redirect" title="R-134a">R-134a</a> and <a href="/wiki/R-410A" title="R-410A">R-410A</a>, are hydrofluorocarbons (HFC) with similar thermodynamic properties with insignificant <a href="/wiki/Ozone_depletion_potential" title="Ozone depletion potential">ozone depletion potential</a> (ODP) but had problematic GWP.<a href="#cite_note-58">[58]</a> HFCs are powerful greenhouse gases which contribute to climate change.<a href="#cite_note-Heat_pump_R-410A-59">[59]</a><a href="#cite_note-60">[60]</a> <a href="/wiki/Dimethyl_ether" title="Dimethyl ether">Dimethyl ether</a> (DME) also gained in popularity as a refrigerant in combination with R404a.<a href="#cite_note-Heat_pump_mecanica-dme-61">[61]</a> More recent refrigerants include <a href="/wiki/Difluoromethane" title="Difluoromethane">difluoromethane (R32)</a> with a lower GWP, but still over 600. <table class="wikitable sortable"> <tbody><tr> <th>refrigerant</th> <th>20-year GWP</th> <th>100-year GWP </th></tr> <tr> <td><a href="/wiki/R-290_(refrigerant)" class="mw-redirect" title="R-290 (refrigerant)">R-290</a> propane<a href="#cite_note-Heat_pump_ar6-62">[62]</a> </td> <td>0.072 </td> <td>0.02 </td></tr> <tr> <td><a href="/wiki/R-600a" class="mw-redirect" title="R-600a">R-600a</a> isobutane</td> <td></td> <td>3<a href="#cite_note-63">[63]</a> </td></tr> <tr> <td><a href="/wiki/Difluoromethane" title="Difluoromethane">R-32</a><a href="#cite_note-Heat_pump_ar6-62">[62]</a></td> <td>491</td> <td>136 </td></tr> <tr> <td><a href="/wiki/R-410a" class="mw-redirect" title="R-410a">R-410a</a><a href="#cite_note-Heat_pump_:1-64">[64]</a></td> <td>4705</td> <td>2285 </td></tr> <tr> <td><a href="/wiki/R-134a" class="mw-redirect" title="R-134a">R-134a</a><a href="#cite_note-Heat_pump_:1-64">[64]</a></td> <td>4060</td> <td>1470 </td></tr> <tr> <td><a href="/wiki/R-404a" class="mw-redirect" title="R-404a">R-404a</a><a href="#cite_note-Heat_pump_:1-64">[64]</a></td> <td>7258</td> <td>4808 </td></tr></tbody></table> Devices with R-290 refrigerant (propane) are expected to play a key role in the future.<a href="#cite_note-Heat_pump_:2-54">[54]</a><a href="#cite_note-65">[65]</a> The 100-year GWP of propane, at 0.02, is extremely low and is approximately 7000 times less than R-32. However, the flammability of propane requires additional safety measures: the maximum safe charges have been set significantly lower than for lower flammability refrigerants (only allowing approximately 13.5 times less refrigerant in the system than R-32).<a href="#cite_note-66">[66]</a><a href="#cite_note-67">[67]</a><a href="#cite_note-68">[68]</a> This means that R-290 is not suitable for all situations or locations. Nonetheless, by 2022, an increasing number of devices with R-290 were offered for domestic use, especially in Europe.[<a href="/wiki/Wikipedia:Citation_needed" title="Wikipedia:Citation needed">citation needed</a>] At the same time,[<a href="/wiki/Wikipedia:Manual_of_Style/Dates_and_numbers#Chronological_items" title="Wikipedia:Manual of Style/Dates and numbers">when?</a>] HFC refrigerants still dominate the market. Recent government mandates have seen the phase-out of <a href="/wiki/Chlorodifluoromethane" title="Chlorodifluoromethane">R-22</a> refrigerant. Replacements such as R-32 and R-410A are being promoted as environmentally friendly but still have a high GWP.<a href="#cite_note-69">[69]</a> A heat pump typically uses 3 kg of refrigerant. With R-32 this amount still has a 20-year impact equivalent to 7 tons of CO2, which corresponds to two years of natural gas heating in an average household. Refrigerants with a high ODP have already been phased out.[<a href="/wiki/Wikipedia:Citation_needed" title="Wikipedia:Citation needed">citation needed</a>]</div></div> <div class="mw-heading mw-heading2"><h2 id="Impact_on_decarbonization_and_electricity_supply">Impact on decarbonization and electricity supply</h2>[<a href="/w/index.php?title=Air_source_heat_pump&action=edit&section=8" title="Edit section: Impact on decarbonization and electricity supply">edit</a>]</div> Heat pumps are key to <a href="/wiki/Decarbonising" class="mw-redirect" title="Decarbonising">decarbonizing</a> home energy use by <a href="/wiki/Phasing_out_gas_boilers" class="mw-redirect" title="Phasing out gas boilers">phasing out gas boilers</a>.<a href="#cite_note-:4-20">[20]</a><a href="#cite_note-:5-12">[12]</a> As of 2024 the IEA says that 500 million tonnes of CO2 emissions could be cut by 2030.<a href="#cite_note-70">[70]</a> As <a href="/wiki/Wind_farm" title="Wind farm">wind farms</a> are increasingly used to supply electricity to some grids, such as Canada's <a href="/wiki/Yukon_Territory" class="mw-redirect" title="Yukon Territory">Yukon Territory</a>, the increased winter load matches well with the increased winter generation from <a href="/wiki/Wind_turbine" title="Wind turbine">wind turbines</a>, and calmer days result in decreased heating load for most houses even if the air temperature is low.<a href="#cite_note-71">[71]</a> Heat pumps could help stabilize grids through <a href="/wiki/Demand_response" title="Demand response">demand response</a>.<a href="#cite_note-72">[72]</a> As heat pump penetration increases some countries, such as the UK, may need to encourage households to use <a href="/wiki/Thermal_energy_storage" title="Thermal energy storage">thermal energy storage</a>, such as very well insulated water tanks.<a href="#cite_note-73">[73]</a> In some countries, such as Australia, integration of this thermal storage with <a href="/wiki/Rooftop_solar_power" title="Rooftop solar power">rooftop solar</a> would also help.<a href="#cite_note-74">[74]</a> Although higher cost heat pumps can be more efficient a 2024 study concluded that for the UK "from an energy system perspective, it is overall cost-optimal to design heat pumps with nominal COP in the range of 2.8–3.2, which typically has a specific cost lower than 650 £/kWth, and simultaneously to invest in increased capacities of renewable energy generation technologies and batteries, in the first instance, followed by OCGT and CCGT with CCS."<a href="#cite_note-75">[75]</a> <div class="mw-heading mw-heading2"><h2 id="Economics">Economics</h2>[<a href="/w/index.php?title=Air_source_heat_pump&action=edit&section=9" title="Edit section: Economics">edit</a>]</div> <div class="mw-heading mw-heading3"><h3 id="Cost">Cost</h3>[<a href="/w/index.php?title=Air_source_heat_pump&action=edit&section=10" title="Edit section: Cost">edit</a>]</div> As of 2023<a class="external text" href="https://en.wikipedia.org/w/index.php?title=Air_source_heat_pump&action=edit">[update]</a> buying and installing an ASHP in an existing house is expensive if there is no government subsidy, but the lifetime cost will likely be less than or similar to a gas boiler and air conditioner.<a href="#cite_note-:7-76">[76]</a><a href="#cite_note-WS_1-77">[77]</a> This is generally also true if cooling is not required, as the ASHP will likely last longer if only heating.<a href="#cite_note-78">[78]</a> The lifetime cost of an air source heat pump will be affected by the price of electricity compared to gas (where available), and may take two to ten years to break even.<a href="#cite_note-:7-76">[76]</a> The IEA recommends governments subsidize the purchase price of residential heat pumps, and some countries do so.<a href="#cite_note-:6-79">[79]</a> <div class="mw-heading mw-heading3"><h3 id="Market">Market</h3>[<a href="/w/index.php?title=Air_source_heat_pump&action=edit&section=11" title="Edit section: Market">edit</a>]</div> In Norway,<a href="#cite_note-80">[80]</a> Australia and New Zealand most heating is from heat pumps. In 2022 heat pumps outsold fossil fuel based heating in the US and France.<a href="#cite_note-:6-79">[79]</a> In the UK, annual heat pump sales have steadily grown in recent years with 26,725 heat pumps sold in 2018, a figure which has increased to 60,244 heat pumps sales in 2023.<a href="#cite_note-81">[81]</a> ASHPs can be helped to compete by increasing the <a href="/wiki/Price_of_fossil_gas" class="mw-redirect" title="Price of fossil gas">price of fossil gas</a> compared to <a href="/wiki/Electricity_pricing" title="Electricity pricing">that of electricity</a> and using suitable <a href="/wiki/Flexible_electricity_pricing" class="mw-redirect" title="Flexible electricity pricing">flexible electricity pricing</a>.<a href="#cite_note-:4-20">[20]</a> In the US air-to-air is the most common type.<a href="#cite_note-82">[82]</a> As of 2023<a class="external text" href="https://en.wikipedia.org/w/index.php?title=Air_source_heat_pump&action=edit">[update]</a> over 80% of heat pumps are air source.<a href="#cite_note-:5-12">[12]</a> In 2023 the IEA appealed for better data - especially on air-to-air.<a href="#cite_note-:6-79">[79]</a> <div class="mw-heading mw-heading2"><h2 id="Maintenance_and_reliability">Maintenance and reliability</h2>[<a href="/w/index.php?title=Air_source_heat_pump&action=edit&section=12" title="Edit section: Maintenance and reliability">edit</a>]</div> Many of the maintenance needs for air source heat pumps reflect that of conventional air conditioning and furnace installations, such as regular air filter replacements and cleaning of both the indoor evaporator and outdoor condenser coils. However, there are additional maintenance measures unique to the operation of air source heat pumps that concern the physical means by which a heat pump extracts heat from the outdoor air.<a href="#cite_note-83">[83]</a><a href="#cite_note-84">[84]</a><a href="#cite_note-85">[85]</a> Since a heat pump running in cooling mode operates essentially the same as a conventional air conditioning system, these measures primarily concern the performance of ASHPs during the winter, especially in colder climates.<a href="#cite_note-86">[86]</a><a href="#cite_note-87">[87]</a> In colder climates, where the compressor works harder to extract heat from the outside air, it is critical to prevent the buildup of ice and frost on the outdoor coil to maintain ASHP performance. This buildup acts as an insulation layer and decreases the rate of heat exchange by blocking the continuous flow of air over the outdoor coil.<a href="#cite_note-88">[88]</a> To prevent this issue, it is necessary to keep the outdoor coil clean of any dirt or grime, as this can trap moisture from the air, which freezes over the coil.<a href="#cite_note-89">[89]</a> In addition, it is necessary to keep the fins surrounding the condenser coil and air intake grill of the outdoor unit free of any debris, such as leaves, that could further block airflow and impede heat exchange.<a href="#cite_note-90">[90]</a><a href="#cite_note-91">[91]</a> This upkeep helps minimize the need for frequent defrost cycles that put the heat pump into cooling mode and send heated refrigerant to the condenser coil to melt accumulated ice.<a href="#cite_note-92">[92]</a> These defrost cycles can cause pressure fluctuations in the refrigerant lines that lead to refrigerant leaks and diminish performance.<a href="#cite_note-93">[93]</a><a href="#cite_note-94">[94]</a> When heating performance drops, an ASHP can remain reliable through its auxiliary heating strip that provides an additional source of heat through electrical resistance to compensate for any heat losses, although this process is significantly less efficient.<a href="#cite_note-95">[95]</a><a href="#cite_note-96">[96]</a> It is thought that ASHP need less maintenance than fossil fuelled heating, and some say that ASHPs are easier to maintain than ground source heat pumps due to the difficulty of finding and fixing underground leaks. Installing too small an ASHP could shorten its lifetime (but one which is too large will be less efficient).<a href="#cite_note-97">[97]</a> However others say that boilers require less maintenance than ASHPs.<a href="#cite_note-98">[98]</a> A <a href="/wiki/Consumer_Reports" title="Consumer Reports">Consumer Reports</a> survey found that "on average, around half of heat pumps are likely to experience problems by the end of the eighth year of ownership".<a href="#cite_note-99">[99]</a> <div class="mw-heading mw-heading2"><h2 id="History">History</h2>[<a href="/w/index.php?title=Air_source_heat_pump&action=edit&section=13" title="Edit section: History">edit</a>]</div> Modern chemical refrigeration techniques developed after the proposal of the <a href="/wiki/Carnot_cycle" title="Carnot cycle">Carnot cycle</a> in 1824. <a href="/wiki/Jacob_Perkins" title="Jacob Perkins">Jacob Perkins</a> invented an <a href="/wiki/Ice" title="Ice">ice</a>-making machine that used <a href="/wiki/Diethyl_ether" title="Diethyl ether">ether</a> in 1843, and Edmond Carré built a <a href="/wiki/Refrigerator" title="Refrigerator">refrigerator</a> that used <a href="/wiki/Water" title="Water">water</a> and <a href="/wiki/Sulfuric_acid" title="Sulfuric acid">sulfuric acid</a> in 1850. In Japan, <a href="/wiki/Fusanosuke_Kuhara" title="Fusanosuke Kuhara">Fusanosuke Kuhara</a>, founder of <a href="/wiki/Hitachi,_Ltd." class="mw-redirect" title="Hitachi, Ltd.">Hitachi, Ltd.</a>, made an <a href="/wiki/Air_conditioner" class="mw-redirect" title="Air conditioner">air conditioner</a> for his own home use using compressed CO2 as a refrigerant in 1917.<a href="#cite_note-100">[100]</a> In 1930 <a href="/wiki/Thomas_Midgley_Jr." title="Thomas Midgley Jr.">Thomas Midgley Jr.</a> discovered <a href="/wiki/Dichlorodifluoromethane" title="Dichlorodifluoromethane">dichlorodifluoromethane</a>, a chlorinated <a href="/wiki/Fluorocarbon" title="Fluorocarbon">fluorocarbon</a> (<a href="/wiki/Chlorofluorocarbon" title="Chlorofluorocarbon">CFC</a>) known as <a href="/wiki/Freon" title="Freon">freon</a>. CFCs rapidly replaced traditional refrigerant substances, including CO2 (which proved hard to compress for domestic use<a href="#cite_note-discoverCO2-101">[101]</a>), for use in <a href="/wiki/Heat_pumps" class="mw-redirect" title="Heat pumps">heat pumps</a> and <a href="/wiki/Refrigerators" class="mw-redirect" title="Refrigerators">refrigerators</a>. But from the 1980s CFCs began to lose favor as refrigerant when their damaging effects on the <a href="/wiki/Ozone_layer" title="Ozone layer">ozone layer</a> were discovered. Two alternative types of refrigerant, hydrofluorocarbons (<a href="/wiki/Hydrofluorocarbon" title="Hydrofluorocarbon">HFCs</a>) and hydrochlorofluorocarbons (<a href="/wiki/Hydrochlorofluorocarbons#Development_of_alternatives_for_CFCs" class="mw-redirect" title="Hydrochlorofluorocarbons">HCFCs</a>), also lost favor when they were identified as <a href="/wiki/Greenhouse_gases" class="mw-redirect" title="Greenhouse gases">greenhouse gases</a> (additionally, HCFCs were found to be more damaging to the ozone layer than originally thought). The <a href="/wiki/Vienna_Convention_for_the_Protection_of_the_Ozone_Layer" title="Vienna Convention for the Protection of the Ozone Layer">Vienna Convention for the Protection of the Ozone Layer</a>, the <a href="/wiki/Montreal_Protocol" title="Montreal Protocol">Montreal Protocol</a> and the <a href="/wiki/Kyoto_Protocol" title="Kyoto Protocol">Kyoto Protocol</a> call for the complete abandonment of such refrigerants by 2030. In 1989, amid international concern about the effects of <a href="/wiki/Chlorofluorocarbons" class="mw-redirect" title="Chlorofluorocarbons">chlorofluorocarbons</a> and hydrochlorofluorocarbons on the ozone layer, scientist <a href="/wiki/Gustav_Lorentzen_(scientist)" title="Gustav Lorentzen (scientist)">Gustav Lorentzen</a> and <a href="/wiki/SINTEF" title="SINTEF">SINTEF</a> patented a method for using CO2 as a refrigerant in heating and cooling. Further research into CO2 refrigeration was then conducted at Shecco (Sustainable HEating and Cooling with CO2) in <a href="/wiki/Brussels" title="Brussels">Brussels</a>, <a href="/wiki/Belgium" title="Belgium">Belgium</a>, leading to increasing use of CO2 refrigerant technology in Europe.<a href="#cite_note-discoverCO2-101">[101]</a> In 1993 the Japanese company <a href="/wiki/Denso" title="Denso">Denso</a>, in collaboration with Gustav Lorentzen, developed an <a href="/wiki/Automobile" class="mw-redirect" title="Automobile">automobile</a> air conditioner using CO2 as a refrigerant. They demonstrated the invention at the June 1998 International Institute of Refrigeration/Gustav Lorentzen Conference.<a href="#cite_note-102">[102]</a> After the conference, CRIEPI (<a href="/wiki/Central_Research_Institute_of_Electric_Power_Industry" title="Central Research Institute of Electric Power Industry">Central Research Institute of Electric Power Industry</a>) and TEPCO (<a href="/wiki/The_Tokyo_Electric_Power_Company" class="mw-redirect" title="The Tokyo Electric Power Company">The Tokyo Electric Power Company</a>) approached Denso about developing a prototype air conditioner using natural refrigerant materials instead of freon. Together they produced 30 <a href="/wiki/Prototype" title="Prototype">prototype</a> units for a year-long experimental installation at locations throughout <a href="/wiki/Japan" title="Japan">Japan</a>, from the cold climate of <a href="/wiki/Hokkaid%C5%8D" class="mw-redirect" title="Hokkaidō">Hokkaidō</a> to hotter <a href="/wiki/Okinawa_Prefecture" title="Okinawa Prefecture">Okinawa</a>. After this successful <a href="/wiki/Feasibility_study" title="Feasibility study">feasibility study</a>, Denso obtained a patent to compress CO2 refrigerant for use in a heat pump from SINTEF in September 2000. During the early 21st century CO2 heat pumps, under the <a href="/w/index.php?title=EcoCute&action=edit&redlink=1" class="new" title="EcoCute (page does not exist)">EcoCute</a> patent, became popular for new-build housing in Japan but were slower to take off elsewhere.<a href="#cite_note-103">[103]</a> <div class="mw-heading mw-heading2"><h2 id="Manufacturing">Manufacturing</h2>[<a href="/w/index.php?title=Air_source_heat_pump&action=edit&section=14" title="Edit section: Manufacturing">edit</a>]</div> Demand for heat pumps increased in the first quarter of the 21st century in the US and Europe, with governments subsidizing them to increase <a href="/wiki/Energy_security" title="Energy security">energy security</a> and <a href="/wiki/Decarbonisation" class="mw-redirect" title="Decarbonisation">decarbonisation</a>. Europeans tend to use air-to-water (also called hydronic) systems which utilize radiators, rather than the air-to-air systems more common elsewhere. Asian countries made three-quarters of heat pumps globally in 2021.<a href="#cite_note-104">[104]</a> <div class="mw-heading mw-heading2"><h2 id="See_also">See also</h2>[<a href="/w/index.php?title=Air_source_heat_pump&action=edit&section=15" title="Edit section: See also">edit</a>]</div> <ul><li><a href="/wiki/Category:Heating,_ventilation,_and_air_conditioning_companies" title="Category:Heating, ventilation, and air conditioning companies">Category:Heating, ventilation, and air conditioning companies</a></li> <li><a href="/wiki/Transcritical_cycle" title="Transcritical cycle">Transcritical cycle</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="References">References</h2>[<a href="/w/index.php?title=Air_source_heat_pump&action=edit&section=16" title="Edit section: References">edit</a>]</div> <style data-mw-deduplicate="TemplateStyles:r1239543626">.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output .reflist-columns-2{column-width:30em}.mw-parser-output .reflist-columns-3{column-width:25em}.mw-parser-output .reflist-columns{margin-top:0.3em}.mw-parser-output .reflist-columns ol{margin-top:0}.mw-parser-output .reflist-columns li{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .reflist-upper-alpha{list-style-type:upper-alpha}.mw-parser-output .reflist-upper-roman{list-style-type:upper-roman}.mw-parser-output .reflist-lower-alpha{list-style-type:lower-alpha}.mw-parser-output .reflist-lower-greek{list-style-type:lower-greek}.mw-parser-output .reflist-lower-roman{list-style-type:lower-roman}</style><div class="reflist reflist-columns references-column-width" style="column-width: 25em;"> <ol class="references"> <li id="cite_note-:9-1">^ <a href="#cite_ref-:9_1-0">a</a> <a href="#cite_ref-:9_1-1">b</a> <a href="#cite_ref-:9_1-2">c</a> <style data-mw-deduplicate="TemplateStyles:r1238218222">.mw-parser-output cite.citation{font-style:inherit;word-wrap:break-word}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}.mw-parser-output .id-lock-free.id-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/6/65/Lock-green.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-limited.id-lock-limited a,.mw-parser-output .id-lock-registration.id-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/d/d6/Lock-gray-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-subscription.id-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/a/aa/Lock-red-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/4/4c/Wikisource-logo.svg")right 0.1em center/12px no-repeat}body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-free a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-limited a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-registration a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-subscription a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .cs1-ws-icon a{background-size:contain;padding:0 1em 0 0}.mw-parser-output .cs1-code{color:inherit;background:inherit;border:none;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;color:var(--color-error,#d33)}.mw-parser-output .cs1-visible-error{color:var(--color-error,#d33)}.mw-parser-output .cs1-maint{display:none;color:#085;margin-left:0.3em}.mw-parser-output .cs1-kern-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right{padding-right:0.2em}.mw-parser-output .citation .mw-selflink{font-weight:inherit}@media screen{.mw-parser-output .cs1-format{font-size:95%}html.skin-theme-clientpref-night .mw-parser-output .cs1-maint{color:#18911f}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .cs1-maint{color:#18911f}}</style><cite class="citation news cs1"><a rel="nofollow" class="external text" href="https://www.economist.com/britain/2023/11/30/why-britains-homes-will-need-different-types-of-heat-pump?utm_medium=cpc.adword.pd&utm_source=google&ppccampaignID=18151738051&ppcadID=&utm_campaign=a.22brand_pmax&utm_content=conversion.direct-response.anonymous&gad_source=1&gclid=EAIaIQobChMIzquM9uy2hAMVV4toCR2ZYA9FEAAYASAAEgKJm_D_BwE&gclsrc=aw.ds">"Why Britain's homes will need different types of heat pump"</a>. The Economist. <a href="/wiki/ISSN_(identifier)" class="mw-redirect" title="ISSN (identifier)">ISSN</a> <a rel="nofollow" class="external text" href="https://search.worldcat.org/issn/0013-0613">0013-0613</a>. Retrieved 19 February 2024.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=The+Economist&rft.atitle=Why+Britain%27s+homes+will+need+different+types+of+heat+pump&rft.issn=0013-0613&rft_id=https%3A%2F%2Fwww.economist.com%2Fbritain%2F2023%2F11%2F30%2Fwhy-britains-homes-will-need-different-types-of-heat-pump%3Futm_medium%3Dcpc.adword.pd%26utm_source%3Dgoogle%26ppccampaignID%3D18151738051%26ppcadID%3D%26utm_campaign%3Da.22brand_pmax%26utm_content%3Dconversion.direct-response.anonymous%26gad_source%3D1%26gclid%3DEAIaIQobChMIzquM9uy2hAMVV4toCR2ZYA9FEAAYASAAEgKJm_D_BwE%26gclsrc%3Daw.ds&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-2"><a href="#cite_ref-2">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.newntide.com/blog/what-is-an-air-source-heat-pump/">"What is an Air-Source Heat Pump? A Complete Guide In 2024"</a>. NEWNTIDE. 24 October 2024. Retrieved 30 September 2024.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=NEWNTIDE&rft.atitle=What+is+an+Air-Source+Heat+Pump%3F+A+Complete+Guide+In+2024&rft.date=2024-10-24&rft_id=https%3A%2F%2Fwww.newntide.com%2Fblog%2Fwhat-is-an-air-source-heat-pump%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-3"><a href="#cite_ref-3">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFLeHuangHewitt2018" class="citation journal cs1">Le, Khoa; Huang, M.J.; Hewitt, Neil (2018). <a rel="nofollow" class="external text" href="https://docs.lib.purdue.edu/ihpbc/315">"Domestic High Temperature Air Source Heat Pump: Performance Analysis Using TRNSYS Simulations"</a>. International High Performance Buildings Conference. West Lafayette, IN, USA: 5th International High Performance Buildings Conference at Purdue University: 1. Retrieved 20 February 2022.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=International+High+Performance+Buildings+Conference&rft.atitle=Domestic+High+Temperature+Air+Source+Heat+Pump%3A+Performance+Analysis+Using+TRNSYS+Simulations&rft.pages=1&rft.date=2018&rft.aulast=Le&rft.aufirst=Khoa&rft.au=Huang%2C+M.J.&rft.au=Hewitt%2C+Neil&rft_id=https%3A%2F%2Fdocs.lib.purdue.edu%2Fihpbc%2F315&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-:0-4">^ <a href="#cite_ref-:0_4-0">a</a> <a href="#cite_ref-:0_4-1">b</a> <a href="#cite_ref-:0_4-2">c</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation news cs1"><a rel="nofollow" class="external text" href="https://www.economist.com/leaders/2023/09/06/heat-pumps-show-how-hard-decarbonisation-will-be">"Heat pumps show how hard decarbonisation will be"</a>. The Economist. <a href="/wiki/ISSN_(identifier)" class="mw-redirect" title="ISSN (identifier)">ISSN</a> <a rel="nofollow" class="external text" href="https://search.worldcat.org/issn/0013-0613">0013-0613</a>. Retrieved 14 September 2023.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=The+Economist&rft.atitle=Heat+pumps+show+how+hard+decarbonisation+will+be&rft.issn=0013-0613&rft_id=https%3A%2F%2Fwww.economist.com%2Fleaders%2F2023%2F09%2F06%2Fheat-pumps-show-how-hard-decarbonisation-will-be&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-5"><a href="#cite_ref-5">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFLawrence" class="citation web cs1">Lawrence, Karen. <a rel="nofollow" class="external text" href="https://www.which.co.uk/reviews/ground-and-air-source-heat-pumps/article/air-source-heat-pumps-explained-al5MC4f773Zq">"Air source heat pumps explained"</a>. Which?. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20221004170246/https://www.which.co.uk/reviews/ground-and-air-source-heat-pumps/article/air-source-heat-pumps-explained-al5MC4f773Zq">Archived</a> from the original on 4 October 2022. Retrieved 4 October 2022.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Which%3F&rft.atitle=Air+source+heat+pumps+explained&rft.aulast=Lawrence&rft.aufirst=Karen&rft_id=https%3A%2F%2Fwww.which.co.uk%2Freviews%2Fground-and-air-source-heat-pumps%2Farticle%2Fair-source-heat-pumps-explained-al5MC4f773Zq&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-6"><a href="#cite_ref-6">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFCanada2009" class="citation web cs1">Canada, Natural Resources (22 April 2009). <a rel="nofollow" class="external text" href="https://natural-resources.canada.ca/energy-efficiency/energy-star-canada/about/energy-star-announcements/publications/heating-and-cooling-heat-pump/6817">"Heating and Cooling With a Heat Pump"</a>. natural-resources.canada.ca. Retrieved 22 February 2024.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=natural-resources.canada.ca&rft.atitle=Heating+and+Cooling+With+a+Heat+Pump&rft.date=2009-04-22&rft.aulast=Canada&rft.aufirst=Natural+Resources&rft_id=https%3A%2F%2Fnatural-resources.canada.ca%2Fenergy-efficiency%2Fenergy-star-canada%2Fabout%2Fenergy-star-announcements%2Fpublications%2Fheating-and-cooling-heat-pump%2F6817&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-7"><a href="#cite_ref-7">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://grist.org/housing/heat-pumps-do-work-in-the-cold-americans-just-dont-know-it-yet/">"Heat pumps do work in the cold – Americans just don't know it yet"</a>. Grist. 9 May 2022. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20220509105325/https://grist.org/housing/heat-pumps-do-work-in-the-cold-americans-just-dont-know-it-yet/">Archived</a> from the original on 9 May 2022. Retrieved 9 May 2022.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Grist&rft.atitle=Heat+pumps+do+work+in+the+cold+%E2%80%93+Americans+just+don%27t+know+it+yet&rft.date=2022-05-09&rft_id=https%3A%2F%2Fgrist.org%2Fhousing%2Fheat-pumps-do-work-in-the-cold-americans-just-dont-know-it-yet%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-:1-8"><a href="#cite_ref-:1_8-0">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.achrnews.com/articles/152628-the-9-types-of-heat-pumps">"The 9 Types of Heat Pumps"</a>. ACHR News. Retrieved 15 September 2023.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=ACHR+News&rft.atitle=The+9+Types+of+Heat+Pumps&rft_id=https%3A%2F%2Fwww.achrnews.com%2Farticles%2F152628-the-9-types-of-heat-pumps&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-9"><a href="#cite_ref-9">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFLawrenceMassey2023" class="citation web cs1">Lawrence, Karen; Massey, Jake (14 July 2023). <a rel="nofollow" class="external text" href="https://www.which.co.uk/reviews/ground-and-air-source-heat-pumps/article/air-source-heat-pumps-explained-al5MC4f773Zq">"Air source heat pumps explained"</a>. Which?.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Which%3F&rft.atitle=Air+source+heat+pumps+explained&rft.date=2023-07-14&rft.aulast=Lawrence&rft.aufirst=Karen&rft.au=Massey%2C+Jake&rft_id=https%3A%2F%2Fwww.which.co.uk%2Freviews%2Fground-and-air-source-heat-pumps%2Farticle%2Fair-source-heat-pumps-explained-al5MC4f773Zq&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-10"><a href="#cite_ref-10">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.energy.gov/energysaver/ductless-mini-split-heat-pumps">"Ductless Mini-Split Heat Pumps"</a>. Energy.gov. Retrieved 14 September 2023.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Energy.gov&rft.atitle=Ductless+Mini-Split+Heat+Pumps&rft_id=https%3A%2F%2Fwww.energy.gov%2Fenergysaver%2Fductless-mini-split-heat-pumps&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-11"><a href="#cite_ref-11">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.energy.gov/energysaver/air-source-heat-pumps">"Air-Source Heat Pumps"</a>. Energy.gov. Retrieved 14 September 2023.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Energy.gov&rft.atitle=Air-Source+Heat+Pumps&rft_id=https%3A%2F%2Fwww.energy.gov%2Fenergysaver%2Fair-source-heat-pumps&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-:5-12">^ <a href="#cite_ref-:5_12-0">a</a> <a href="#cite_ref-:5_12-1">b</a> <a href="#cite_ref-:5_12-2">c</a> <a href="#cite_ref-:5_12-3">d</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.technologyreview.com/2023/02/14/1068582/everything-you-need-to-know-about-heat-pumps/">"Everything you need to know about the wild world of heat pumps"</a>. MIT Technology Review. Retrieved 19 September 2023.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=MIT+Technology+Review&rft.atitle=Everything+you+need+to+know+about+the+wild+world+of+heat+pumps&rft_id=https%3A%2F%2Fwww.technologyreview.com%2F2023%2F02%2F14%2F1068582%2Feverything-you-need-to-know-about-heat-pumps%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-GBN_1-13"><a href="#cite_ref-GBN_1_13-0">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://ca1-eci.edcdn.com/Gas-boilers-and-NOx-the-hidden-emitter.pdf?v=1603351014">"Gas boilers and NOx: the hidden emitter"</a> (PDF). Energy & Climate Intelligence Unit. October 2020. Retrieved 20 January 2024.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Gas+boilers+and+NOx%3A+the+hidden+emitter&rft.pub=Energy+%26+Climate+Intelligence+Unit&rft.date=2020-10&rft_id=https%3A%2F%2Fca1-eci.edcdn.com%2FGas-boilers-and-NOx-the-hidden-emitter.pdf%3Fv%3D1603351014&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-14"><a href="#cite_ref-14">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation report cs1"><a rel="nofollow" class="external text" href="https://assets.publishing.service.gov.uk/media/5a7d8cc4ed915d3fb95946eb/renewable-energy-reversible-air-to-air-heat-pumps.pdf">The Contribution of Reversible Air-to-Air Heat Pumps to the UK's Obligation under the Renewable Energy Directive (2009/28/EC) - A Delta-ee Report for the Department for Business, Energy and Industrial Strategy</a> (PDF) (Report). Delta Energy & Environment. 2017. <q>virtually all air-air heat pumps sold today are reversible (p.7)</q></cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=report&rft.btitle=The+Contribution+of+Reversible+Air-to-Air+Heat+Pumps+to+the+UK%27s+Obligation+under+the+Renewable+Energy+Directive+%282009%2F28%2FEC%29+-+A+Delta-ee+Report+for+the+Department+for+Business%2C+Energy+and+Industrial+Strategy&rft.pub=Delta+Energy+%26+Environment&rft.date=2017&rft_id=https%3A%2F%2Fassets.publishing.service.gov.uk%2Fmedia%2F5a7d8cc4ed915d3fb95946eb%2Frenewable-energy-reversible-air-to-air-heat-pumps.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-15"><a href="#cite_ref-15">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFHendra2021" class="citation web cs1">Hendra, Graham (5 May 2021). <a rel="nofollow" class="external text" href="https://renewableheatinghub.co.uk/hard-to-cool-your-house-with-a-heat-pump">"Four reasons not cool your house using a heat pump"</a>. Renewable Heating Hub. Retrieved 23 December 2023.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Renewable+Heating+Hub&rft.atitle=Four+reasons+not+cool+your+house+using+a+heat+pump&rft.date=2021-05-05&rft.aulast=Hendra&rft.aufirst=Graham&rft_id=https%3A%2F%2Frenewableheatinghub.co.uk%2Fhard-to-cool-your-house-with-a-heat-pump&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-16"><a href="#cite_ref-16">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://heatpumpingtechnologies.org/publications/annex-53-advanced-cooling-refrigeration-technologies-2-page-summary/">"Annex 53 Advanced Cooling/Refrigeration Technologies 2 page summary"</a>. HPT - Heat Pumping Technologies. Retrieved 19 February 2024.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=HPT+-+Heat+Pumping+Technologies&rft.atitle=Annex+53+Advanced+Cooling%2FRefrigeration+Technologies+2+page+summary&rft_id=https%3A%2F%2Fheatpumpingtechnologies.org%2Fpublications%2Fannex-53-advanced-cooling-refrigeration-technologies-2-page-summary%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-17"><a href="#cite_ref-17">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFAmbrose2023" class="citation news cs1">Ambrose, Jillian (14 August 2023). <a rel="nofollow" class="external text" href="https://www.theguardian.com/environment/2023/aug/14/uk-homes-install-record-number-of-solar-panels-and-heat-pumps">"UK homes install 'record number' of solar panels and heat pumps"</a>. The Guardian. <a href="/wiki/ISSN_(identifier)" class="mw-redirect" title="ISSN (identifier)">ISSN</a> <a rel="nofollow" class="external text" href="https://search.worldcat.org/issn/0261-3077">0261-3077</a>. Retrieved 16 September 2023.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=The+Guardian&rft.atitle=UK+homes+install+%27record+number%27+of+solar+panels+and+heat+pumps&rft.date=2023-08-14&rft.issn=0261-3077&rft.aulast=Ambrose&rft.aufirst=Jillian&rft_id=https%3A%2F%2Fwww.theguardian.com%2Fenvironment%2F2023%2Faug%2F14%2Fuk-homes-install-record-number-of-solar-panels-and-heat-pumps&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-18"><a href="#cite_ref-18">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFFranklin_Energy_Services,_LLC2011" class="citation web cs1">Franklin Energy Services, LLC (2011). <a rel="nofollow" class="external text" href="https://web.archive.org/web/20140611123108/http://mn.gov/commerce/energy/images/CIP-AirSource-Pump-Report.pdf">"Air Source Heat Pump Efficiency Gains from Low Ambient Temperature Operation Using Supplemental Electric Heating: Thermal Storage Supplemental Heating Systems"</a> (PDF). Minnesota Division of Energy Resources; Minnesota Department of Commerce. p. 9. Archived from <a rel="nofollow" class="external text" href="http://mn.gov/commerce/energy/images/CIP-AirSource-Pump-Report.pdf">the original</a> (PDF) on 11 June 2014. Retrieved 15 October 2014.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Air+Source+Heat+Pump+Efficiency+Gains+from+Low+Ambient+Temperature+Operation+Using+Supplemental+Electric+Heating%3A+Thermal+Storage+Supplemental+Heating+Systems&rft.pages=9&rft.pub=Minnesota+Division+of+Energy+Resources%3B+Minnesota+Department+of+Commerce&rft.date=2011&rft.au=Franklin+Energy+Services%2C+LLC&rft_id=http%3A%2F%2Fmn.gov%2Fcommerce%2Fenergy%2Fimages%2FCIP-AirSource-Pump-Report.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-:10-19">^ <a href="#cite_ref-:10_19-0">a</a> <a href="#cite_ref-:10_19-1">b</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation news cs1"><a rel="nofollow" class="external text" href="https://www.washingtonpost.com/climate-environment/2023/02/28/how-to-get-heat-pump-home/">"Advice | I tried, and failed, to install a heat pump. Here's how to do it right"</a>. Washington Post. 28 February 2023. Retrieved 19 February 2024.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Washington+Post&rft.atitle=Advice+%7C+I+tried%2C+and+failed%2C+to+install+a+heat+pump.+Here%27s+how+to+do+it+right.&rft.date=2023-02-28&rft_id=https%3A%2F%2Fwww.washingtonpost.com%2Fclimate-environment%2F2023%2F02%2F28%2Fhow-to-get-heat-pump-home%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-:4-20">^ <a href="#cite_ref-:4_20-0">a</a> <a href="#cite_ref-:4_20-1">b</a> <a href="#cite_ref-:4_20-2">c</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFHarris,_B.2023" class="citation web cs1">Harris, B. (14 July 2023). <a rel="nofollow" class="external text" href="https://researchbriefings.files.parliament.uk/documents/POST-PN-0699/POST-PN-0699.pdf">"Heat pumps"</a> (PDF). <a href="/wiki/UK_Parliament" class="mw-redirect" title="UK Parliament">UK Parliament </a>. Retrieved 20 January 2024.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Heat+pumps&rft.pub=UK+Parliament&rft.date=2023-07-14&rft.au=Harris%2C+B.&rft_id=https%3A%2F%2Fresearchbriefings.files.parliament.uk%2Fdocuments%2FPOST-PN-0699%2FPOST-PN-0699.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-21"><a href="#cite_ref-21">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.cnet.com/home/energy-and-utilities/heres-how-to-pick-the-right-size-heat-pump-for-your-home/">"Here's How to Pick the Right Size Heat Pump for Your Home"</a>. CNET. Retrieved 18 September 2023.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=CNET&rft.atitle=Here%27s+How+to+Pick+the+Right+Size+Heat+Pump+for+Your+Home&rft_id=https%3A%2F%2Fwww.cnet.com%2Fhome%2Fenergy-and-utilities%2Fheres-how-to-pick-the-right-size-heat-pump-for-your-home%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-22"><a href="#cite_ref-22">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://heatpumphouse.com/guides/do-heat-pumps-work-with-radiators/">"Do Heat Pumps Work with Radiators? | Heat Pump House"</a>. heatpumphouse.com. Retrieved 19 February 2024.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=heatpumphouse.com&rft.atitle=Do+Heat+Pumps+Work+with+Radiators%3F+%7C+Heat+Pump+House&rft_id=https%3A%2F%2Fheatpumphouse.com%2Fguides%2Fdo-heat-pumps-work-with-radiators%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-23"><a href="#cite_ref-23">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFJackman2022" class="citation web cs1">Jackman, Josh (28 January 2022). <a rel="nofollow" class="external text" href="https://www.theecoexperts.co.uk/heat-pumps/high-temperature-air-source-heat-pumps">"High Temperature Heat Pumps | Are They Worth It?"</a>. The Eco Experts. Retrieved 17 September 2023.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=The+Eco+Experts&rft.atitle=High+Temperature+Heat+Pumps+%7C+Are+They+Worth+It%3F&rft.date=2022-01-28&rft.aulast=Jackman&rft.aufirst=Josh&rft_id=https%3A%2F%2Fwww.theecoexperts.co.uk%2Fheat-pumps%2Fhigh-temperature-air-source-heat-pumps&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-:11-24">^ <a href="#cite_ref-:11_24-0">a</a> <a href="#cite_ref-:11_24-1">b</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.pickhvac.com/heat-pump/basics/single-stage-vs-two-stage/">"Single Stage vs. Two Stage vs. Variable Speed For Heat Pump/Air Conditioner"</a>. How to Choose Best HVAC Systems. 4 April 2018. Retrieved 19 February 2024.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=How+to+Choose+Best+HVAC+Systems&rft.atitle=Single+Stage+vs.+Two+Stage+vs.+Variable+Speed+For+Heat+Pump%2FAir+Conditioner&rft.date=2018-04-04&rft_id=https%3A%2F%2Fwww.pickhvac.com%2Fheat-pump%2Fbasics%2Fsingle-stage-vs-two-stage%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-:3-25">^ <a href="#cite_ref-:3_25-0">a</a> <a href="#cite_ref-:3_25-1">b</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.hydro.mb.ca/your_home/heating_and_cooling/cold_climate_air_source_heat_pumps/">"Cold climate air source heat pumps"</a>. www.hydro.mb.ca. Retrieved 15 September 2023.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=www.hydro.mb.ca&rft.atitle=Cold+climate+air+source+heat+pumps&rft_id=https%3A%2F%2Fwww.hydro.mb.ca%2Fyour_home%2Fheating_and_cooling%2Fcold_climate_air_source_heat_pumps%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-:2-26">^ <a href="#cite_ref-:2_26-0">a</a> <a href="#cite_ref-:2_26-1">b</a> <a href="#cite_ref-:2_26-2">c</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.consumerreports.org/heat-pumps/can-heat-pumps-actually-work-in-cold-climates-a4929629430/">"Can Heat Pumps Actually Work in Cold Climates?"</a>. Consumer Reports. 2 August 2022. Retrieved 15 September 2023.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Consumer+Reports&rft.atitle=Can+Heat+Pumps+Actually+Work+in+Cold+Climates%3F&rft.date=2022-08-02&rft_id=https%3A%2F%2Fwww.consumerreports.org%2Fheat-pumps%2Fcan-heat-pumps-actually-work-in-cold-climates-a4929629430%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-27"><a href="#cite_ref-27">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.forbes.com/sites/tomkonrad/2014/01/15/are-air-source-heat-pumps-a-threat-to-geothermal-heat-pump-suppliers/">"Are Air Source Heat Pumps A Threat To Geothermal Heat Pump Suppliers?"</a>. Forbes. Retrieved 15 October 2014.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Forbes&rft.atitle=Are+Air+Source+Heat+Pumps+A+Threat+To+Geothermal+Heat+Pump+Suppliers%3F&rft_id=https%3A%2F%2Fwww.forbes.com%2Fsites%2Ftomkonrad%2F2014%2F01%2F15%2Fare-air-source-heat-pumps-a-threat-to-geothermal-heat-pump-suppliers%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-:8-28">^ <a href="#cite_ref-:8_28-0">a</a> <a href="#cite_ref-:8_28-1">b</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://energysavingtrust.org.uk/advice/hybrid-heat-pumps/">"Hybrid heat pumps"</a>. Energy Saving Trust. Retrieved 30 September 2023.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Energy+Saving+Trust&rft.atitle=Hybrid+heat+pumps&rft_id=https%3A%2F%2Fenergysavingtrust.org.uk%2Fadvice%2Fhybrid-heat-pumps%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-29"><a href="#cite_ref-29">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.evergreenenergy.co.uk/heat-pumps/how-to-defrost-a-heat-pump-in-winter/">"How to defrost a heat pump in winter"</a>. Evergreen Energy. February 2018. Retrieved 14 September 2021.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Evergreen+Energy&rft.atitle=How+to+defrost+a+heat+pump+in+winter&rft.date=2018-02&rft_id=https%3A%2F%2Fwww.evergreenenergy.co.uk%2Fheat-pumps%2Fhow-to-defrost-a-heat-pump-in-winter%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-30"><a href="#cite_ref-30">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.nachi.org/defrost-cycle-heat-pump.htm">"Defrost Cycle of a Heat Pump"</a>. International Association of Home Inspectors. Retrieved 14 September 2021.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=International+Association+of+Home+Inspectors&rft.atitle=Defrost+Cycle+of+a+Heat+Pump&rft_id=https%3A%2F%2Fwww.nachi.org%2Fdefrost-cycle-heat-pump.htm&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-31"><a href="#cite_ref-31">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFOlabiMahmoudObaideenSayed2023" class="citation journal cs1">Olabi, Abdul-Ghani; Mahmoud, Montaser; Obaideen, Khaled; Sayed, Enas Taha; Ramadan, Mohamad; Abdelkareem, Mohammad Ali (1 June 2023). <a rel="nofollow" class="external text" href="https://dx.doi.org/10.1016/j.tsep.2023.101851">"Ground source heat pumps: Recent progress, applications, challenges, barriers, and role in achieving sustainable development goals based on bibliometric analysis"</a>. Thermal Science and Engineering Progress. 41: 101851. <a href="/wiki/Bibcode_(identifier)" class="mw-redirect" title="Bibcode (identifier)">Bibcode</a>:<a rel="nofollow" class="external text" href="https://ui.adsabs.harvard.edu/abs/2023TSEP...4101851O">2023TSEP...4101851O</a>. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1016%2Fj.tsep.2023.101851">10.1016/j.tsep.2023.101851</a>. <a href="/wiki/ISSN_(identifier)" class="mw-redirect" title="ISSN (identifier)">ISSN</a> <a rel="nofollow" class="external text" href="https://search.worldcat.org/issn/2451-9049">2451-9049</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Thermal+Science+and+Engineering+Progress&rft.atitle=Ground+source+heat+pumps%3A+Recent+progress%2C+applications%2C+challenges%2C+barriers%2C+and+role+in+achieving+sustainable+development+goals+based+on+bibliometric+analysis&rft.volume=41&rft.pages=101851&rft.date=2023-06-01&rft.issn=2451-9049&rft_id=info%3Adoi%2F10.1016%2Fj.tsep.2023.101851&rft_id=info%3Abibcode%2F2023TSEP...4101851O&rft.aulast=Olabi&rft.aufirst=Abdul-Ghani&rft.au=Mahmoud%2C+Montaser&rft.au=Obaideen%2C+Khaled&rft.au=Sayed%2C+Enas+Taha&rft.au=Ramadan%2C+Mohamad&rft.au=Abdelkareem%2C+Mohammad+Ali&rft_id=http%3A%2F%2Fdx.doi.org%2F10.1016%2Fj.tsep.2023.101851&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-:12-32">^ <a href="#cite_ref-:12_32-0">a</a> <a href="#cite_ref-:12_32-1">b</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFMattinenNissinenHyysaloJuntunen2014" class="citation journal cs1">Mattinen, Maija K.; Nissinen, Ari; Hyysalo, Sampsa; Juntunen, Jouni K. (27 July 2014). <a rel="nofollow" class="external text" href="https://dx.doi.org/10.1111/jiec.12166">"Energy Use and Greenhouse Gas Emissions of Air-Source Heat Pump and Innovative Ground-Source Air Heat Pump in a Cold Climate"</a>. Journal of Industrial Ecology. 19 (1): 61–70. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1111%2Fjiec.12166">10.1111/jiec.12166</a>. <a href="/wiki/ISSN_(identifier)" class="mw-redirect" title="ISSN (identifier)">ISSN</a> <a rel="nofollow" class="external text" href="https://search.worldcat.org/issn/1088-1980">1088-1980</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Journal+of+Industrial+Ecology&rft.atitle=Energy+Use+and+Greenhouse+Gas+Emissions+of+Air-Source+Heat+Pump+and+Innovative+Ground-Source+Air+Heat+Pump+in+a+Cold+Climate&rft.volume=19&rft.issue=1&rft.pages=61-70&rft.date=2014-07-27&rft_id=info%3Adoi%2F10.1111%2Fjiec.12166&rft.issn=1088-1980&rft.aulast=Mattinen&rft.aufirst=Maija+K.&rft.au=Nissinen%2C+Ari&rft.au=Hyysalo%2C+Sampsa&rft.au=Juntunen%2C+Jouni+K.&rft_id=http%3A%2F%2Fdx.doi.org%2F10.1111%2Fjiec.12166&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-:13-33">^ <a href="#cite_ref-:13_33-0">a</a> <a href="#cite_ref-:13_33-1">b</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFKimLeeJeongHwang2012" class="citation journal cs1">Kim, Euiyoung; Lee, Jaekeun; Jeong, Youngman; Hwang, Yujin; Lee, Sangheon; Park, Naehyun (1 July 2012). <a rel="nofollow" class="external text" href="https://linkinghub.elsevier.com/retrieve/pii/S0378778812000813">"Performance evaluation under the actual operating condition of a vertical ground source heat pump system in a school building"</a>. Energy and Buildings. 50: 1–6. <a href="/wiki/Bibcode_(identifier)" class="mw-redirect" title="Bibcode (identifier)">Bibcode</a>:<a rel="nofollow" class="external text" href="https://ui.adsabs.harvard.edu/abs/2012EneBu..50....1K">2012EneBu..50....1K</a>. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1016%2Fj.enbuild.2012.02.006">10.1016/j.enbuild.2012.02.006</a>. <a href="/wiki/ISSN_(identifier)" class="mw-redirect" title="ISSN (identifier)">ISSN</a> <a rel="nofollow" class="external text" href="https://search.worldcat.org/issn/0378-7788">0378-7788</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Energy+and+Buildings&rft.atitle=Performance+evaluation+under+the+actual+operating+condition+of+a+vertical+ground+source+heat+pump+system+in+a+school+building&rft.volume=50&rft.pages=1-6&rft.date=2012-07-01&rft.issn=0378-7788&rft_id=info%3Adoi%2F10.1016%2Fj.enbuild.2012.02.006&rft_id=info%3Abibcode%2F2012EneBu..50....1K&rft.aulast=Kim&rft.aufirst=Euiyoung&rft.au=Lee%2C+Jaekeun&rft.au=Jeong%2C+Youngman&rft.au=Hwang%2C+Yujin&rft.au=Lee%2C+Sangheon&rft.au=Park%2C+Naehyun&rft_id=https%3A%2F%2Flinkinghub.elsevier.com%2Fretrieve%2Fpii%2FS0378778812000813&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-34"><a href="#cite_ref-34">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFKoopmanZhuRohlfs2024" class="citation journal cs1">Koopman, Tim; Zhu, Tingting; Rohlfs, Wilko (29 February 2024). <a rel="nofollow" class="external text" href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10877192">"Performance evaluation of air-source heat pump based on a pressure drop embedded model"</a>. Heliyon. 10 (4): e24634. <a href="/wiki/Bibcode_(identifier)" class="mw-redirect" title="Bibcode (identifier)">Bibcode</a>:<a rel="nofollow" class="external text" href="https://ui.adsabs.harvard.edu/abs/2024Heliy..1024634K">2024Heliy..1024634K</a>. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1016%2Fj.heliyon.2024.e24634">10.1016/j.heliyon.2024.e24634</a>. <a href="/wiki/ISSN_(identifier)" class="mw-redirect" title="ISSN (identifier)">ISSN</a> <a rel="nofollow" class="external text" href="https://search.worldcat.org/issn/2405-8440">2405-8440</a>. <a href="/wiki/PMC_(identifier)" class="mw-redirect" title="PMC (identifier)">PMC</a> <a rel="nofollow" class="external text" href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10877192">10877192</a>. <a href="/wiki/PMID_(identifier)" class="mw-redirect" title="PMID (identifier)">PMID</a> <a rel="nofollow" class="external text" href="https://pubmed.ncbi.nlm.nih.gov/38380015">38380015</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Heliyon&rft.atitle=Performance+evaluation+of+air-source+heat+pump+based+on+a+pressure+drop+embedded+model&rft.volume=10&rft.issue=4&rft.pages=e24634&rft.date=2024-02-29&rft_id=https%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fpmc%2Farticles%2FPMC10877192%23id-name%3DPMC&rft_id=info%3Abibcode%2F2024Heliy..1024634K&rft_id=info%3Apmid%2F38380015&rft_id=info%3Adoi%2F10.1016%2Fj.heliyon.2024.e24634&rft.issn=2405-8440&rft.aulast=Koopman&rft.aufirst=Tim&rft.au=Zhu%2C+Tingting&rft.au=Rohlfs%2C+Wilko&rft_id=https%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fpmc%2Farticles%2FPMC10877192&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-35"><a href="#cite_ref-35">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFGreeningAzapagic2012" class="citation journal cs1">Greening, Benjamin; Azapagic, Adisa (1 March 2012). <a rel="nofollow" class="external text" href="https://linkinghub.elsevier.com/retrieve/pii/S0360544212000333">"Domestic heat pumps: Life cycle environmental impacts and potential implications for the UK"</a>. Energy. Sustainable Energy and Environmental Protection 2010. 39 (1): 205–217. <a href="/wiki/Bibcode_(identifier)" class="mw-redirect" title="Bibcode (identifier)">Bibcode</a>:<a rel="nofollow" class="external text" href="https://ui.adsabs.harvard.edu/abs/2012Ene....39..205G">2012Ene....39..205G</a>. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1016%2Fj.energy.2012.01.028">10.1016/j.energy.2012.01.028</a>. <a href="/wiki/ISSN_(identifier)" class="mw-redirect" title="ISSN (identifier)">ISSN</a> <a rel="nofollow" class="external text" href="https://search.worldcat.org/issn/0360-5442">0360-5442</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Energy&rft.atitle=Domestic+heat+pumps%3A+Life+cycle+environmental+impacts+and+potential+implications+for+the+UK&rft.volume=39&rft.issue=1&rft.pages=205-217&rft.date=2012-03-01&rft.issn=0360-5442&rft_id=info%3Adoi%2F10.1016%2Fj.energy.2012.01.028&rft_id=info%3Abibcode%2F2012Ene....39..205G&rft.aulast=Greening&rft.aufirst=Benjamin&rft.au=Azapagic%2C+Adisa&rft_id=https%3A%2F%2Flinkinghub.elsevier.com%2Fretrieve%2Fpii%2FS0360544212000333&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-36"><a href="#cite_ref-36">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://vancouver.ca/files/cov/heat-pump-noise-guide.pdf">"HEAT PUMPS & NOISE: A NEIGHBOURLY INSTALLATION GUIDE"</a> (PDF).</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=HEAT+PUMPS+%26+NOISE%3A+A+NEIGHBOURLY+INSTALLATION+GUIDE&rft_id=https%3A%2F%2Fvancouver.ca%2Ffiles%2Fcov%2Fheat-pump-noise-guide.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-37"><a href="#cite_ref-37">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20160702095821/http://ehp.niehs.nih.gov/1307272/">"Monica S. Hammer, Tracy K. Swinburn, and Richard L. Neitzel "Environmental Noise Pollution in the United States: Developing an Effective Public Health Response" Environmental Health Perspectives V122,I2,2014"</a>. Archived from <a rel="nofollow" class="external text" href="http://ehp.niehs.nih.gov/1307272/">the original</a> on 2 July 2016. Retrieved 25 January 2016.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Monica+S.+Hammer%2C+Tracy+K.+Swinburn%2C+and+Richard+L.+Neitzel+%22Environmental+Noise+Pollution+in+the+United+States%3A+Developing+an+Effective+Public+Health+Response%22+Environmental+Health+Perspectives+V122%2CI2%2C2014&rft_id=http%3A%2F%2Fehp.niehs.nih.gov%2F1307272%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-38"><a href="#cite_ref-38">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://heat-pumps.org.uk/how-noisy-are-heat-pumps/">"How Noisy Are Heat Pumps?"</a>. Heat Pumps UK. 11 April 2022. Retrieved 14 September 2023.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Heat+Pumps+UK&rft.atitle=How+Noisy+Are+Heat+Pumps%3F&rft.date=2022-04-11&rft_id=https%3A%2F%2Fheat-pumps.org.uk%2Fhow-noisy-are-heat-pumps%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-39"><a href="#cite_ref-39">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://mcscertified.com/wp-content/uploads/2021/10/MCS-020.pdf">"Microgeneration Installation Standard MCS 020"</a> (PDF). MCS. Retrieved 17 March 2024.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=MCS&rft.atitle=Microgeneration+Installation+Standard+MCS+020&rft_id=https%3A%2F%2Fmcscertified.com%2Fwp-content%2Fuploads%2F2021%2F10%2FMCS-020.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-40"><a href="#cite_ref-40">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://check-mark.co.uk/info/plan/planning-permission/noise-neighbours/">"Noise and Neighbours: The rules regarding noise from heat pump outdoor units - MCS 020 or equivalent"</a>. Checkmark. Retrieved 17 March 2024.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Checkmark&rft.atitle=Noise+and+Neighbours%3A+The+rules+regarding+noise+from+heat+pump+outdoor+units+-+MCS+020+or+equivalent&rft_id=https%3A%2F%2Fcheck-mark.co.uk%2Finfo%2Fplan%2Fplanning-permission%2Fnoise-neighbours%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-41"><a href="#cite_ref-41">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.europarl.europa.eu/doceo/document/PETI-CM-703148_EN.pdf">"Petition No 0922/2020 by F.B. (German) on low-frequency noise limit values"</a> (PDF).</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Petition+No+0922%2F2020+by+F.B.+%28German%29+on+low-frequency+noise+limit+values&rft_id=https%3A%2F%2Fwww.europarl.europa.eu%2Fdoceo%2Fdocument%2FPETI-CM-703148_EN.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-42"><a href="#cite_ref-42">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20170212105148/http://www.hiil.org/bestpractices/How%20to%20determine%20acceptable%20levels%20of%20noise%20nuisance%20%28France%29">"Hiil innovating Justice "How to determine acceptable levels of noise nuisance (France)"</a>. Archived from <a rel="nofollow" class="external text" href="http://www.hiil.org/bestpractices/How%20to%20determine%20acceptable%20levels%20of%20noise%20nuisance%20%28France%29">the original</a> on 12 February 2017. Retrieved 25 January 2016.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Hiil+innovating+Justice+%22How+to+determine+acceptable+levels+of+noise+nuisance+%28France%29&rft_id=http%3A%2F%2Fwww.hiil.org%2Fbestpractices%2FHow%2520to%2520determine%2520acceptable%2520levels%2520of%2520noise%2520nuisance%2520%2528France%2529&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-43"><a href="#cite_ref-43">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://legifrance.gouv.fr/affichCodeArticle.do?cidTexte=LEGITEXT000006072665&idArticle=LEGIARTI000006910540&dateTexte=&categorieLien=cid">"Code de la santé publique – Article R1334-33 (in French)"</a>. Retrieved 8 February 2016.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Code+de+la+sant%C3%A9+publique+%E2%80%93+Article+R1334-33+%28in+French%29&rft_id=http%3A%2F%2Flegifrance.gouv.fr%2FaffichCodeArticle.do%3FcidTexte%3DLEGITEXT000006072665%26idArticle%3DLEGIARTI000006910540%26dateTexte%3D%26categorieLien%3Dcid&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-44"><a href="#cite_ref-44">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://physics.stackexchange.com/questions/350074/is-there-some-theoretical-maximum-coefficient-of-performance-cop-for-heat-pump">"Is there some theoretical maximum coefficient of performance (COP) for heat pumps and chillers?"</a>. Physics Stack Exchange. Retrieved 19 February 2024.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Physics+Stack+Exchange&rft.atitle=Is+there+some+theoretical+maximum+coefficient+of+performance+%28COP%29+for+heat+pumps+and+chillers%3F&rft_id=https%3A%2F%2Fphysics.stackexchange.com%2Fquestions%2F350074%2Fis-there-some-theoretical-maximum-coefficient-of-performance-cop-for-heat-pump&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-45"><a href="#cite_ref-45">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.bafa.de/SharedDocs/Downloads/DE/Energie/ee_waermepumpen_anlagenliste_bis_2020.html">"Wärmepumpen mit Prüf- / Effizienznachweis (heat pumps with efficiency validation)"</a>. BAFA (Federal Office for Economic Affairs and Export Control in Germany). Retrieved 20 February 2022.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=W%C3%A4rmepumpen+mit+Pr%C3%BCf-+%2F+Effizienznachweis+%28heat+pumps+with+efficiency+validation%29&rft.pub=BAFA+%28Federal+Office+for+Economic+Affairs+and+Export+Control+in+Germany%29&rft_id=https%3A%2F%2Fwww.bafa.de%2FSharedDocs%2FDownloads%2FDE%2FEnergie%2Fee_waermepumpen_anlagenliste_bis_2020.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-EH_1-46"><a href="#cite_ref-EH_1_46-0">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://www.icax.co.uk/Air_Source_Heat_Pumps.html">"Air Source Heat Pumps"</a>. ICAX. Retrieved 20 January 2024.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Air+Source+Heat+Pumps&rft.pub=ICAX&rft_id=http%3A%2F%2Fwww.icax.co.uk%2FAir_Source_Heat_Pumps.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-47"><a href="#cite_ref-47">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.energy.gov/energysaver/operating-and-maintaining-your-heat-pump">"Operating and Maintaining Your Heat Pump"</a>. Energy.gov. Retrieved 19 February 2024.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Energy.gov&rft.atitle=Operating+and+Maintaining+Your+Heat+Pump&rft_id=https%3A%2F%2Fwww.energy.gov%2Fenergysaver%2Foperating-and-maintaining-your-heat-pump&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-48"><a href="#cite_ref-48">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFChamounRulliereHaberschillBerail2012" class="citation journal cs1">Chamoun, Marwan; Rulliere, Romuald; Haberschill, Philippe; Berail, Jean Francois (1 June 2012). <a rel="nofollow" class="external text" href="https://www.sciencedirect.com/science/article/pii/S0140700711003082">"Dynamic model of an industrial heat pump using water as refrigerant"</a>. International Journal of Refrigeration. 35 (4): 1080–1091. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1016%2Fj.ijrefrig.2011.12.007">10.1016/j.ijrefrig.2011.12.007</a>. <a href="/wiki/ISSN_(identifier)" class="mw-redirect" title="ISSN (identifier)">ISSN</a> <a rel="nofollow" class="external text" href="https://search.worldcat.org/issn/0140-7007">0140-7007</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=International+Journal+of+Refrigeration&rft.atitle=Dynamic+model+of+an+industrial+heat+pump+using+water+as+refrigerant&rft.volume=35&rft.issue=4&rft.pages=1080-1091&rft.date=2012-06-01&rft_id=info%3Adoi%2F10.1016%2Fj.ijrefrig.2011.12.007&rft.issn=0140-7007&rft.aulast=Chamoun&rft.aufirst=Marwan&rft.au=Rulliere%2C+Romuald&rft.au=Haberschill%2C+Philippe&rft.au=Berail%2C+Jean+Francois&rft_id=https%3A%2F%2Fwww.sciencedirect.com%2Fscience%2Farticle%2Fpii%2FS0140700711003082&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-49"><a href="#cite_ref-49">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFWu2021" class="citation journal cs1">Wu, Di (2021). <a rel="nofollow" class="external text" href="https://doi.org/10.1016/j.rser.2020.110571">"Vapor compression heat pumps with pure Low-GWP refrigerants"</a>. Renewable and Sustainable Energy Reviews. 138: 110571. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1016%2Fj.rser.2020.110571">10.1016/j.rser.2020.110571</a>. <a href="/wiki/ISSN_(identifier)" class="mw-redirect" title="ISSN (identifier)">ISSN</a> <a rel="nofollow" class="external text" href="https://search.worldcat.org/issn/1364-0321">1364-0321</a>. <a href="/wiki/S2CID_(identifier)" class="mw-redirect" title="S2CID (identifier)">S2CID</a> <a rel="nofollow" class="external text" href="https://api.semanticscholar.org/CorpusID:229455137">229455137</a>. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20230924115906/https://www.sciencedirect.com/science/article/abs/pii/S136403212030856X?via%3Dihub">Archived</a> from the original on 24 September 2023. Retrieved 17 November 2022.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Renewable+and+Sustainable+Energy+Reviews&rft.atitle=Vapor+compression+heat+pumps+with+pure+Low-GWP+refrigerants&rft.volume=138&rft.pages=110571&rft.date=2021&rft_id=https%3A%2F%2Fapi.semanticscholar.org%2FCorpusID%3A229455137%23id-name%3DS2CID&rft.issn=1364-0321&rft_id=info%3Adoi%2F10.1016%2Fj.rser.2020.110571&rft.aulast=Wu&rft.aufirst=Di&rft_id=https%3A%2F%2Fdoi.org%2F10.1016%2Fj.rser.2020.110571&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-50"><a href="#cite_ref-50">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.technologyreview.com/2023/02/14/1068582/everything-you-need-to-know-about-heat-pumps/">"Everything you need to know about the wild world of heat pumps"</a>. MIT Technology Review. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20230801104352/https://www.technologyreview.com/2023/02/14/1068582/everything-you-need-to-know-about-heat-pumps/">Archived</a> from the original on 1 August 2023. Retrieved 19 September 2023.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=MIT+Technology+Review&rft.atitle=Everything+you+need+to+know+about+the+wild+world+of+heat+pumps&rft_id=https%3A%2F%2Fwww.technologyreview.com%2F2023%2F02%2F14%2F1068582%2Feverything-you-need-to-know-about-heat-pumps%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-51"><a href="#cite_ref-51">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFMiara2019" class="citation web cs1">Miara, Marek (22 October 2019). <a rel="nofollow" class="external text" href="https://www.ise.fraunhofer.de/en/press-media/press-releases/2019/heat-pumps-with-climate-friendly-refrigerant-developed-for-indoor-installation.html">"Heat Pumps with Climate-Friendly Refrigerant Developed for Indoor Installation"</a>. Fraunhofer ISE. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20220220224636/https://www.ise.fraunhofer.de/en/press-media/press-releases/2019/heat-pumps-with-climate-friendly-refrigerant-developed-for-indoor-installation.html">Archived</a> from the original on 20 February 2022. Retrieved 21 February 2022.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Heat+Pumps+with+Climate-Friendly+Refrigerant+Developed+for+Indoor+Installation&rft.pub=Fraunhofer+ISE&rft.date=2019-10-22&rft.aulast=Miara&rft.aufirst=Marek&rft_id=https%3A%2F%2Fwww.ise.fraunhofer.de%2Fen%2Fpress-media%2Fpress-releases%2F2019%2Fheat-pumps-with-climate-friendly-refrigerant-developed-for-indoor-installation.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-52"><a href="#cite_ref-52">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFRabe2022" class="citation web cs1">Rabe, Barry G. (23 September 2022). <a rel="nofollow" class="external text" href="https://www.brookings.edu/blog/fixgov/2022/09/23/pivoting-from-global-climate-laggard-to-leader-kigali-and-american-hfc-policy/">"Pivoting from global climate laggard to leader: Kigali and American HFC policy"</a>. Brookings. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20221004135503/https://www.brookings.edu/blog/fixgov/2022/09/23/pivoting-from-global-climate-laggard-to-leader-kigali-and-american-hfc-policy/">Archived</a> from the original on 4 October 2022. Retrieved 4 October 2022.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Brookings&rft.atitle=Pivoting+from+global+climate+laggard+to+leader%3A+Kigali+and+American+HFC+policy&rft.date=2022-09-23&rft.aulast=Rabe&rft.aufirst=Barry+G.&rft_id=https%3A%2F%2Fwww.brookings.edu%2Fblog%2Ffixgov%2F2022%2F09%2F23%2Fpivoting-from-global-climate-laggard-to-leader-kigali-and-american-hfc-policy%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-53"><a href="#cite_ref-53">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFItteilag2012" class="citation book cs1">Itteilag, Richard L. (9 August 2012). <a rel="nofollow" class="external text" href="https://books.google.com/books?id=LpStalb-tF4C&q=R600A+isobutane+ozone+environment&pg=PA77">Green Electricity and Global Warming</a>. AuthorHouse. p. 77. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <a href="/wiki/Special:BookSources/9781477217405" title="Special:BookSources/9781477217405"><bdi>9781477217405</bdi></a>. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20211123223807/https://books.google.com/books?id=LpStalb-tF4C&q=R600A+isobutane+ozone+environment&pg=PA77">Archived</a> from the original on 23 November 2021. Retrieved 1 November 2020.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=Green+Electricity+and+Global+Warming&rft.pages=77&rft.pub=AuthorHouse&rft.date=2012-08-09&rft.isbn=9781477217405&rft.aulast=Itteilag&rft.aufirst=Richard+L.&rft_id=https%3A%2F%2Fbooks.google.com%2Fbooks%3Fid%3DLpStalb-tF4C%26q%3DR600A%2Bisobutane%2Bozone%2Benvironment%26pg%3DPA77&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-Heat_pump_:2-54">^ <a href="#cite_ref-Heat_pump_:2_54-0">a</a> <a href="#cite_ref-Heat_pump_:2_54-1">b</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation news cs1"><a rel="nofollow" class="external text" href="https://www.economist.com/science-and-technology/2023/09/06/propane-powered-heat-pumps-are-greener">"Propane-powered heat pumps are greener"</a>. <a href="/wiki/The_Economist" title="The Economist">The Economist</a>. 6 September 2023. <a href="/wiki/ISSN_(identifier)" class="mw-redirect" title="ISSN (identifier)">ISSN</a> <a rel="nofollow" class="external text" href="https://search.worldcat.org/issn/0013-0613">0013-0613</a>. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20230917022901/https://www.economist.com/science-and-technology/2023/09/06/propane-powered-heat-pumps-are-greener">Archived</a> from the original on 17 September 2023. Retrieved 17 September 2023.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=The+Economist&rft.atitle=Propane-powered+heat+pumps+are+greener&rft.date=2023-09-06&rft.issn=0013-0613&rft_id=https%3A%2F%2Fwww.economist.com%2Fscience-and-technology%2F2023%2F09%2F06%2Fpropane-powered-heat-pumps-are-greener&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-55"><a href="#cite_ref-55">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.dti.dk/co2-heat-pump-20-200-kw/44672">"Smart CO2 Heat Pump"</a>. www.dti.dk. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20230130083759/https://www.dti.dk/co2-heat-pump-20-200-kw/44672">Archived</a> from the original on 30 January 2023. Retrieved 17 September 2023.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=www.dti.dk&rft.atitle=Smart+CO2+Heat+Pump&rft_id=https%3A%2F%2Fwww.dti.dk%2Fco2-heat-pump-20-200-kw%2F44672&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-56"><a href="#cite_ref-56">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://heatpumpingtechnologies.org/publications/annex-53-advanced-cooling-refrigeration-technologies-2-page-summary/">"Annex 53 Advanced Cooling/Refrigeration Technologies 2 page summary"</a>. HPT - Heat Pumping Technologies. Retrieved 19 February 2024.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=HPT+-+Heat+Pumping+Technologies&rft.atitle=Annex+53+Advanced+Cooling%2FRefrigeration+Technologies+2+page+summary&rft_id=https%3A%2F%2Fheatpumpingtechnologies.org%2Fpublications%2Fannex-53-advanced-cooling-refrigeration-technologies-2-page-summary%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-57"><a href="#cite_ref-57">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20160530171422/http://ozone.unep.org/Publications/MP_Handbook/Section_1.2_Control_measures/Annex_A_-_Group_I.shtml">"Handbook for the Montreal Protocol on Substances that Deplete the Ozone Layer – 7th Edition"</a>. United Nations Environment Programme – Ozone Secretariat. 2007. Archived from <a rel="nofollow" class="external text" href="http://ozone.unep.org/Publications/MP_Handbook/Section_1.2_Control_measures/Annex_A_-_Group_I.shtml">the original</a> on 30 May 2016. Retrieved 18 December 2016.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Handbook+for+the+Montreal+Protocol+on+Substances+that+Deplete+the+Ozone+Layer+%E2%80%93+7th+Edition&rft.pub=United+Nations+Environment+Programme+%E2%80%93+Ozone+Secretariat&rft.date=2007&rft_id=http%3A%2F%2Fozone.unep.org%2FPublications%2FMP_Handbook%2FSection_1.2_Control_measures%2FAnnex_A_-_Group_I.shtml&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-58"><a href="#cite_ref-58">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://www.engineeringtoolbox.com/Refrigerants-Environment-Properties-d_1220.html">"Refrigerants – Environmental Properties"</a>. The Engineering ToolBox. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20130314143622/http://www.engineeringtoolbox.com/Refrigerants-Environment-Properties-d_1220.html">Archived</a> from the original on 14 March 2013. Retrieved 12 September 2016.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=The+Engineering+ToolBox&rft.atitle=Refrigerants+%E2%80%93+Environmental+Properties&rft_id=http%3A%2F%2Fwww.engineeringtoolbox.com%2FRefrigerants-Environment-Properties-d_1220.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-Heat_pump_R-410A-59"><a href="#cite_ref-Heat_pump_R-410A_59-0">^</a> <a href="/wiki/R-410A#Environmental_effects" title="R-410A">R-410A#Environmental effects</a>. </li> <li id="cite_note-60"><a href="#cite_ref-60">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="Calculation_of_green_house_gas_potential_of_R-410A" class="citation web cs1">Ecometrica.com (27 June 2012). <a rel="nofollow" class="external text" href="http://ecometrica.com/article/calculating-the-global-warming-potential-of-refrigerant-gas-mixes">"Calculation of green house gas potential of R-410A"</a>. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20150713232735/http://ecometrica.com/article/calculating-the-global-warming-potential-of-refrigerant-gas-mixes">Archived</a> from the original on 13 July 2015. Retrieved 13 July 2015.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Calculation+of+green+house+gas+potential+of+R-410A&rft.date=2012-06-27&rft.au=Ecometrica.com&rft_id=http%3A%2F%2Fecometrica.com%2Farticle%2Fcalculating-the-global-warming-potential-of-refrigerant-gas-mixes&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-Heat_pump_mecanica-dme-61"><a href="#cite_ref-Heat_pump_mecanica-dme_61-0">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20120314211640/http://www.mecanica.pub.ro/frigo-eco/R404A_DME.pdf">"R404 and DME Refrigerant blend as a new solution to limit global warming potential"</a> (PDF). 14 March 2012. Archived from <a rel="nofollow" class="external text" href="http://www.mecanica.pub.ro/frigo-eco/R404A_DME.pdf">the original</a> (PDF) on 14 March 2012.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=R404+and+DME+Refrigerant+blend+as+a+new+solution+to+limit+global+warming+potential&rft.date=2012-03-14&rft_id=http%3A%2F%2Fwww.mecanica.pub.ro%2Ffrigo-eco%2FR404A_DME.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-Heat_pump_ar6-62">^ <a href="#cite_ref-Heat_pump_ar6_62-0">a</a> <a href="#cite_ref-Heat_pump_ar6_62-1">b</a> <a href="#CITEREFIPCC_AR6_WG1_Ch72021">IPCC_AR6_WG1_Ch7 2021</a>, 7SM-26 </li> <li id="cite_note-63"><a href="#cite_ref-63">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFLearnMetrics2023" class="citation web cs1">LearnMetrics (12 May 2023). <a rel="nofollow" class="external text" href="https://learnmetrics.com/low-gwp-refrigerants/">"List of Low GWP Refrigerants: 69 Refrigerants Below 500 GWP"</a>. LearnMetrics. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20230610114014/https://learnmetrics.com/low-gwp-refrigerants/">Archived</a> from the original on 10 June 2023. Retrieved 13 September 2023.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=LearnMetrics&rft.atitle=List+of+Low+GWP+Refrigerants%3A+69+Refrigerants+Below+500+GWP&rft.date=2023-05-12&rft.au=LearnMetrics&rft_id=https%3A%2F%2Flearnmetrics.com%2Flow-gwp-refrigerants%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-Heat_pump_:1-64">^ <a href="#cite_ref-Heat_pump_:1_64-0">a</a> <a href="#cite_ref-Heat_pump_:1_64-1">b</a> <a href="#cite_ref-Heat_pump_:1_64-2">c</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://iifiir.org/en/encyclopedia-of-refrigeration/global-warming-potential-gwp-of-hfc-refrigerants">"Global warming potential (GWP) of HFC refrigerants"</a>. iifiir.org. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20230924115907/https://iifiir.org/en/encyclopedia-of-refrigeration/global-warming-potential-gwp-of-hfc-refrigerants">Archived</a> from the original on 24 September 2023. Retrieved 13 September 2023.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=iifiir.org&rft.atitle=Global+warming+potential+%28GWP%29+of+HFC+refrigerants&rft_id=https%3A%2F%2Fiifiir.org%2Fen%2Fencyclopedia-of-refrigeration%2Fglobal-warming-potential-gwp-of-hfc-refrigerants&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-65"><a href="#cite_ref-65">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFEveritt2023" class="citation web cs1">Everitt, Neil (15 September 2023). <a rel="nofollow" class="external text" href="https://www.coolingpost.com/world-news/qvantum-plant-has-1-million-heat-pump-capacity/">"Qvantum plant has 1 million heat pump capacity"</a>. Cooling Post. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20230924120053/https://www.coolingpost.com/world-news/qvantum-plant-has-1-million-heat-pump-capacity/">Archived</a> from the original on 24 September 2023. Retrieved 17 September 2023.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Cooling+Post&rft.atitle=Qvantum+plant+has+1+million+heat+pump+capacity&rft.date=2023-09-15&rft.aulast=Everitt&rft.aufirst=Neil&rft_id=https%3A%2F%2Fwww.coolingpost.com%2Fworld-news%2Fqvantum-plant-has-1-million-heat-pump-capacity%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-66"><a href="#cite_ref-66">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFMiara2019" class="citation web cs1">Miara, Marek (22 October 2019). <a rel="nofollow" class="external text" href="https://www.ise.fraunhofer.de/en/press-media/press-releases/2019/heat-pumps-with-climate-friendly-refrigerant-developed-for-indoor-installation.html">"Heat Pumps with Climate-Friendly Refrigerant Developed for Indoor Installation"</a>. Fraunhofer ISE. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20220220224636/https://www.ise.fraunhofer.de/en/press-media/press-releases/2019/heat-pumps-with-climate-friendly-refrigerant-developed-for-indoor-installation.html">Archived</a> from the original on 20 February 2022. Retrieved 21 February 2022.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Heat+Pumps+with+Climate-Friendly+Refrigerant+Developed+for+Indoor+Installation&rft.pub=Fraunhofer+ISE&rft.date=2019-10-22&rft.aulast=Miara&rft.aufirst=Marek&rft_id=https%3A%2F%2Fwww.ise.fraunhofer.de%2Fen%2Fpress-media%2Fpress-releases%2F2019%2Fheat-pumps-with-climate-friendly-refrigerant-developed-for-indoor-installation.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-67"><a href="#cite_ref-67">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://check-mark.co.uk/info/basics/refrigerant-safety/">"Refrigerant Safety - About Refrigerant Safety, Toxicity and Flammability"</a>. Checkmark. Retrieved 17 April 2024.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Checkmark&rft.atitle=Refrigerant+Safety+-+About+Refrigerant+Safety%2C+Toxicity+and+Flammability&rft_id=https%3A%2F%2Fcheck-mark.co.uk%2Finfo%2Fbasics%2Frefrigerant-safety%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-68"><a href="#cite_ref-68">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.acrjournal.uk/features/a2l-mildly-flammable-refrigerants/">"A2L – Mildly Flammable Refrigerants"</a>. ACR Journal. 1 September 2015. Retrieved 17 April 2024.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=ACR+Journal&rft.atitle=A2L+%E2%80%93+Mildly+Flammable+Refrigerants&rft.date=2015-09-01&rft_id=https%3A%2F%2Fwww.acrjournal.uk%2Ffeatures%2Fa2l-mildly-flammable-refrigerants%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-69"><a href="#cite_ref-69">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFUS_Environmental_Protection_Agency2014" class="citation web cs1">US Environmental Protection Agency, OAR (14 November 2014). <a rel="nofollow" class="external text" href="https://www.epa.gov/ods-phaseout">"Phaseout of Ozone-Depleting Substances (ODS)"</a>. US EPA. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20150924132109/http://www.epa.gov/ozone/title6/phaseout/accfact.html">Archived</a> from the original on 24 September 2015. Retrieved 16 February 2020.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=US+EPA&rft.atitle=Phaseout+of+Ozone-Depleting+Substances+%28ODS%29&rft.date=2014-11-14&rft.aulast=US+Environmental+Protection+Agency&rft.aufirst=OAR&rft_id=https%3A%2F%2Fwww.epa.gov%2Fods-phaseout&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-70"><a href="#cite_ref-70">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.iea.org/energy-system/buildings/heat-pumps">"Heat Pumps - Energy System"</a>. IEA. Retrieved 19 February 2024.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=IEA&rft.atitle=Heat+Pumps+-+Energy+System&rft_id=https%3A%2F%2Fwww.iea.org%2Fenergy-system%2Fbuildings%2Fheat-pumps&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-71"><a href="#cite_ref-71">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://www.energy.gov.yk.ca/pdf/air_source_heat_pumps_final_may2013_v04.pdf">"An Evaluation of Air Source Heat Pump Technology in Yukon"</a> (PDF). Government of Yukon's Energy Solution Centre and Yukon Energy, Mines and Resources. 31 May 2013. Retrieved 15 October 2014.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=An+Evaluation+of+Air+Source+Heat+Pump+Technology+in+Yukon&rft.pub=Government+of+Yukon%27s+Energy+Solution+Centre+and+Yukon+Energy%2C+Mines+and+Resources&rft.date=2013-05-31&rft_id=http%3A%2F%2Fwww.energy.gov.yk.ca%2Fpdf%2Fair_source_heat_pumps_final_may2013_v04.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-72"><a href="#cite_ref-72">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://heatpumpingtechnologies.org/news/1/54881">"The added value of heatpumps for grid stability via demand response"</a>. HPT - Heat Pumping Technologies. Retrieved 15 September 2023.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=HPT+-+Heat+Pumping+Technologies&rft.atitle=The+added+value+of+heatpumps+for+grid+stability+via+demand+response&rft_id=https%3A%2F%2Fheatpumpingtechnologies.org%2Fnews%2F1%2F54881&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-73"><a href="#cite_ref-73">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://eng.ox.ac.uk/news/how-heat-pumps-can-keep-homes-warm-without-frying-the-power-grid">"How heat pumps can keep homes warm without frying the power grid"</a>. eng.ox.ac.uk. Retrieved 15 September 2023.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=eng.ox.ac.uk&rft.atitle=How+heat+pumps+can+keep+homes+warm+without+frying+the+power+grid&rft_id=https%3A%2F%2Feng.ox.ac.uk%2Fnews%2Fhow-heat-pumps-can-keep-homes-warm-without-frying-the-power-grid&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-74"><a href="#cite_ref-74">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFLiRosengartenStanleyMojiri2022" class="citation journal cs1">Li, Yuanyuan; Rosengarten, Gary; Stanley, Cameron; Mojiri, Ahmad (10 December 2022). <a rel="nofollow" class="external text" href="https://www.sciencedirect.com/science/article/pii/S2352152X22018618">"Electrification of residential heating, cooling and hot water: Load smoothing using onsite photovoltaics, heat pump and thermal batteries"</a>. Journal of Energy Storage. 56: 105873. <a href="/wiki/Bibcode_(identifier)" class="mw-redirect" title="Bibcode (identifier)">Bibcode</a>:<a rel="nofollow" class="external text" href="https://ui.adsabs.harvard.edu/abs/2022JEnSt..5605873L">2022JEnSt..5605873L</a>. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1016%2Fj.est.2022.105873">10.1016/j.est.2022.105873</a>. <a href="/wiki/ISSN_(identifier)" class="mw-redirect" title="ISSN (identifier)">ISSN</a> <a rel="nofollow" class="external text" href="https://search.worldcat.org/issn/2352-152X">2352-152X</a>. <a href="/wiki/S2CID_(identifier)" class="mw-redirect" title="S2CID (identifier)">S2CID</a> <a rel="nofollow" class="external text" href="https://api.semanticscholar.org/CorpusID:253858807">253858807</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Journal+of+Energy+Storage&rft.atitle=Electrification+of+residential+heating%2C+cooling+and+hot+water%3A+Load+smoothing+using+onsite+photovoltaics%2C+heat+pump+and+thermal+batteries&rft.volume=56&rft.pages=105873&rft.date=2022-12-10&rft_id=info%3Adoi%2F10.1016%2Fj.est.2022.105873&rft_id=https%3A%2F%2Fapi.semanticscholar.org%2FCorpusID%3A253858807%23id-name%3DS2CID&rft.issn=2352-152X&rft_id=info%3Abibcode%2F2022JEnSt..5605873L&rft.aulast=Li&rft.aufirst=Yuanyuan&rft.au=Rosengarten%2C+Gary&rft.au=Stanley%2C+Cameron&rft.au=Mojiri%2C+Ahmad&rft_id=https%3A%2F%2Fwww.sciencedirect.com%2Fscience%2Farticle%2Fpii%2FS2352152X22018618&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-75"><a href="#cite_ref-75">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFOlympiosHoseinpooriMarkides2024" class="citation journal cs1">Olympios, Andreas V.; Hoseinpoori, Pooya; Markides, Christos N. (14 February 2024). <a rel="nofollow" class="external text" href="https://doi.org/10.1016%2Fj.crsus.2024.100021">"Toward optimal designs of domestic air-to-water heat pumps for a net-zero carbon energy system in the UK"</a>. Cell Reports Sustainability. 1 (2): 100021. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1016%2Fj.crsus.2024.100021">10.1016/j.crsus.2024.100021</a>. <a href="/wiki/ISSN_(identifier)" class="mw-redirect" title="ISSN (identifier)">ISSN</a> <a rel="nofollow" class="external text" href="https://search.worldcat.org/issn/2949-7906">2949-7906</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Cell+Reports+Sustainability&rft.atitle=Toward+optimal+designs+of+domestic+air-to-water+heat+pumps+for+a+net-zero+carbon+energy+system+in+the+UK&rft.volume=1&rft.issue=2&rft.pages=100021&rft.date=2024-02-14&rft_id=info%3Adoi%2F10.1016%2Fj.crsus.2024.100021&rft.issn=2949-7906&rft.aulast=Olympios&rft.aufirst=Andreas+V.&rft.au=Hoseinpoori%2C+Pooya&rft.au=Markides%2C+Christos+N.&rft_id=https%3A%2F%2Fdoi.org%2F10.1016%252Fj.crsus.2024.100021&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-:7-76">^ <a href="#cite_ref-:7_76-0">a</a> <a href="#cite_ref-:7_76-1">b</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.homeinspector.org/consumers/hvac/heat-pump-installation-cost">"How Much Does Heat Pump Installation Cost? (2023 Guide)"</a>. ASHI. Retrieved 30 September 2023.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=ASHI&rft.atitle=How+Much+Does+Heat+Pump+Installation+Cost%3F+%282023+Guide%29&rft_id=https%3A%2F%2Fwww.homeinspector.org%2Fconsumers%2Fhvac%2Fheat-pump-installation-cost&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-WS_1-77"><a href="#cite_ref-WS_1_77-0">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFChung,_E.2023" class="citation web cs1">Chung, E. (26 September 2023). <a rel="nofollow" class="external text" href="https://www.cbc.ca/news/science/heat-pump-cost-savings-1.6975426">"Will switching to a heat pump save you money? Here's how to find out"</a>. CBC/Radio-Canada. Retrieved 20 January 2024.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Will+switching+to+a+heat+pump+save+you+money%3F+Here%27s+how+to+find+out&rft.pub=CBC%2FRadio-Canada&rft.date=2023-09-26&rft.au=Chung%2C+E.&rft_id=https%3A%2F%2Fwww.cbc.ca%2Fnews%2Fscience%2Fheat-pump-cost-savings-1.6975426&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-78"><a href="#cite_ref-78">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://carbonswitch.com/heat-pump-vs-ac/">"Heat pumps vs. AC — Why Upfront Costs Can Be Misleading"</a>. carbonswitch.com. Retrieved 30 September 2023.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=carbonswitch.com&rft.atitle=Heat+pumps+vs.+AC+%E2%80%94+Why+Upfront+Costs+Can+Be+Misleading&rft_id=https%3A%2F%2Fcarbonswitch.com%2Fheat-pump-vs-ac%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-:6-79">^ <a href="#cite_ref-:6_79-0">a</a> <a href="#cite_ref-:6_79-1">b</a> <a href="#cite_ref-:6_79-2">c</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.iea.org/commentaries/global-heat-pump-sales-continue-double-digit-growth">"Global heat pump sales continue double-digit growth – Analysis"</a>. IEA. 31 March 2023. Retrieved 15 September 2023.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=IEA&rft.atitle=Global+heat+pump+sales+continue+double-digit+growth+%E2%80%93+Analysis&rft.date=2023-03-31&rft_id=https%3A%2F%2Fwww.iea.org%2Fcommentaries%2Fglobal-heat-pump-sales-continue-double-digit-growth&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-80"><a href="#cite_ref-80">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFRosenowGibbNowakLowes2022" class="citation journal cs1">Rosenow, Jan; Gibb, Duncan; Nowak, Thomas; Lowes, Richard (October 2022). <a rel="nofollow" class="external text" href="https://doi.org/10.1038%2Fs41560-022-01104-8">"Heating up the global heat pump market"</a>. Nature Energy. 7 (10): 901–904. <a href="/wiki/Bibcode_(identifier)" class="mw-redirect" title="Bibcode (identifier)">Bibcode</a>:<a rel="nofollow" class="external text" href="https://ui.adsabs.harvard.edu/abs/2022NatEn...7..901R">2022NatEn...7..901R</a>. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1038%2Fs41560-022-01104-8">10.1038/s41560-022-01104-8</a>. <a href="/wiki/ISSN_(identifier)" class="mw-redirect" title="ISSN (identifier)">ISSN</a> <a rel="nofollow" class="external text" href="https://search.worldcat.org/issn/2058-7546">2058-7546</a>. <a href="/wiki/S2CID_(identifier)" class="mw-redirect" title="S2CID (identifier)">S2CID</a> <a rel="nofollow" class="external text" href="https://api.semanticscholar.org/CorpusID:252141783">252141783</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Nature+Energy&rft.atitle=Heating+up+the+global+heat+pump+market&rft.volume=7&rft.issue=10&rft.pages=901-904&rft.date=2022-10&rft_id=info%3Adoi%2F10.1038%2Fs41560-022-01104-8&rft_id=https%3A%2F%2Fapi.semanticscholar.org%2FCorpusID%3A252141783%23id-name%3DS2CID&rft.issn=2058-7546&rft_id=info%3Abibcode%2F2022NatEn...7..901R&rft.aulast=Rosenow&rft.aufirst=Jan&rft.au=Gibb%2C+Duncan&rft.au=Nowak%2C+Thomas&rft.au=Lowes%2C+Richard&rft_id=https%3A%2F%2Fdoi.org%2F10.1038%252Fs41560-022-01104-8&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-81"><a href="#cite_ref-81">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.heatpumps.org.uk/resources/statistics/">"Source: Heat Pump Association"</a>. Heat Pumps. Retrieved 14 June 2024.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Heat+Pumps&rft.atitle=Source%3A+Heat+Pump+Association&rft_id=https%3A%2F%2Fwww.heatpumps.org.uk%2Fresources%2Fstatistics%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-82"><a href="#cite_ref-82">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation news cs1"><a rel="nofollow" class="external text" href="https://www.nytimes.com/wirecutter/guides/heat-pump-buying-guide/">"A Heat Pump Might Be Right for Your Home. Here's Everything to Know"</a>. The New York Times. 6 June 2023. <a href="/wiki/ISSN_(identifier)" class="mw-redirect" title="ISSN (identifier)">ISSN</a> <a rel="nofollow" class="external text" href="https://search.worldcat.org/issn/0362-4331">0362-4331</a>. Retrieved 18 September 2023.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=The+New+York+Times&rft.atitle=A+Heat+Pump+Might+Be+Right+for+Your+Home.+Here%27s+Everything+to+Know.&rft.date=2023-06-06&rft.issn=0362-4331&rft_id=https%3A%2F%2Fwww.nytimes.com%2Fwirecutter%2Fguides%2Fheat-pump-buying-guide%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-83"><a href="#cite_ref-83">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.nyserda.ny.gov/-/media/Project/Nyserda/Files/Publications/Fact-Sheets/CHC-CON-ASHP-main-fs-1-v1.pdf">"AIR SOURCE HEAT PUMP MAINTENANCE TIPS"</a> (PDF). New York State Clean Heat.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=New+York+State+Clean+Heat&rft.atitle=AIR+SOURCE+HEAT+PUMP+MAINTENANCE+TIPS&rft_id=https%3A%2F%2Fwww.nyserda.ny.gov%2F-%2Fmedia%2FProject%2FNyserda%2FFiles%2FPublications%2FFact-Sheets%2FCHC-CON-ASHP-main-fs-1-v1.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-84"><a href="#cite_ref-84">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.saveonenergy.ca/-/media/Files/SaveOnEnergy/training-and-support/hvac/ASHP-Regular-Maintenance-and-Timely-Repairs-Guide.pdf">"AIR SOURCE HEAT PUMPS. MAINTENANCE CONSIDERATIONS FOR HOMES"</a> (PDF). Save on Energy. Independent Electricity System Operator.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Save+on+Energy.+Independent+Electricity+System+Operator.&rft.atitle=AIR+SOURCE+HEAT+PUMPS.+MAINTENANCE+CONSIDERATIONS+FOR+HOMES&rft_id=https%3A%2F%2Fwww.saveonenergy.ca%2F-%2Fmedia%2FFiles%2FSaveOnEnergy%2Ftraining-and-support%2Fhvac%2FASHP-Regular-Maintenance-and-Timely-Repairs-Guide.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-85"><a href="#cite_ref-85">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://nextzero.org/wp-content/uploads/MassCEC_ASHP_GUIDE_V2-1.pdf">"YOUR GUIDE TO Air-Source Heat Pumps"</a> (PDF). Clean Energy Lives Here. Massachusetts Clean Energy Center.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Clean+Energy+Lives+Here.+Massachusetts+Clean+Energy+Center.&rft.atitle=YOUR+GUIDE+TO+Air-Source+Heat+Pumps&rft_id=https%3A%2F%2Fnextzero.org%2Fwp-content%2Fuploads%2FMassCEC_ASHP_GUIDE_V2-1.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-86"><a href="#cite_ref-86">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.midohioenergy.com/sites/midohioenergy/files/documents/energy_saving_cards/hvac_id_041614.pdf">"Heating, Ventilation and Air Conditioning. What Kind of HVAC System You Have and How to Use It"</a> (PDF). Energy Saving Recipe. Southface Energy Institute.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Energy+Saving+Recipe.+Southface+Energy+Institute.&rft.atitle=Heating%2C+Ventilation+and+Air+Conditioning.+What+Kind+of+HVAC+System+You+Have+and+How+to+Use+It&rft_id=https%3A%2F%2Fwww.midohioenergy.com%2Fsites%2Fmidohioenergy%2Ffiles%2Fdocuments%2Fenergy_saving_cards%2Fhvac_id_041614.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-87"><a href="#cite_ref-87">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.homeperformance.ca/wp-content/uploads/2019/12/ASHP_QI_Best_Practice_Guide_20191209.pdf">"HEAT PUMP BEST PRACTICES. INSTALLATION GUIDE FOR EXISTING HOMES"</a> (PDF). HOME PERFORMANCE STAKEHOLDER COUNCIL | HEAT PUMP BEST PRACTICES GUIDE. 2019.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=HOME+PERFORMANCE+STAKEHOLDER+COUNCIL+%7C+HEAT+PUMP+BEST+PRACTICES+GUIDE.&rft.atitle=HEAT+PUMP+BEST+PRACTICES.+INSTALLATION+GUIDE+FOR+EXISTING+HOMES.&rft.date=2019&rft_id=https%3A%2F%2Fwww.homeperformance.ca%2Fwp-content%2Fuploads%2F2019%2F12%2FASHP_QI_Best_Practice_Guide_20191209.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-88"><a href="#cite_ref-88">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFMilevAl-HabaibehFanshaweLuke_Siena2023" class="citation journal cs1">Milev, George; Al-Habaibeh, Amin; Fanshawe, Simon; Luke Siena, Francesco (1 December 2023). <a rel="nofollow" class="external text" href="https://doi.org/10.1016%2Fj.enbuild.2023.113656">"Investigating the effect of the defrost cycles of air-source heat pumps on their electricity demand in residential buildings"</a>. Energy and Buildings. 300. <a href="/wiki/Bibcode_(identifier)" class="mw-redirect" title="Bibcode (identifier)">Bibcode</a>:<a rel="nofollow" class="external text" href="https://ui.adsabs.harvard.edu/abs/2023EneBu.30013656M">2023EneBu.30013656M</a>. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1016%2Fj.enbuild.2023.113656">10.1016/j.enbuild.2023.113656</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Energy+and+Buildings&rft.atitle=Investigating+the+effect+of+the+defrost+cycles+of+air-source+heat+pumps+on+their+electricity+demand+in+residential+buildings&rft.volume=300&rft.date=2023-12-01&rft_id=info%3Adoi%2F10.1016%2Fj.enbuild.2023.113656&rft_id=info%3Abibcode%2F2023EneBu.30013656M&rft.aulast=Milev&rft.aufirst=George&rft.au=Al-Habaibeh%2C+Amin&rft.au=Fanshawe%2C+Simon&rft.au=Luke+Siena%2C+Francesco&rft_id=https%3A%2F%2Fdoi.org%2F10.1016%252Fj.enbuild.2023.113656&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-89"><a href="#cite_ref-89">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFJingdongWeiYuyingShiming2018" class="citation journal cs1">Jingdong, Liu; Wei, Wang; Yuying, Sun; Shiming, Deng (April 2018). <a rel="nofollow" class="external text" href="https://www.sciencedirect.com/science/article/pii/S014070071830046X">"Operating performances of a space heating ASHP unit with a foul outdoor coil following a prolonged cooling operation"</a>. International Journal of Refrigeration. 88: 614–625. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1016%2Fj.ijrefrig.2018.01.013">10.1016/j.ijrefrig.2018.01.013</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=International+Journal+of+Refrigeration&rft.atitle=Operating+performances+of+a+space+heating+ASHP+unit+with+a+foul+outdoor+coil+following+a+prolonged+cooling+operation&rft.volume=88&rft.pages=614-625&rft.date=2018-04&rft_id=info%3Adoi%2F10.1016%2Fj.ijrefrig.2018.01.013&rft.aulast=Jingdong&rft.aufirst=Liu&rft.au=Wei%2C+Wang&rft.au=Yuying%2C+Sun&rft.au=Shiming%2C+Deng&rft_id=https%3A%2F%2Fwww.sciencedirect.com%2Fscience%2Farticle%2Fpii%2FS014070071830046X&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-90"><a href="#cite_ref-90">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFNawazElatarFricke2018" class="citation web cs1">Nawaz, Kashif; Elatar, Ahmed; Fricke, Brian (31 March 2018). <a rel="nofollow" class="external text" href="https://info.ornl.gov/sites/publications/Files/Pub117976.pdf">"A Critical Literature Review of Defrost Technologies for Heat Pumps and Refrigeration Systems"</a> (PDF). Energy and Transportation Sciences Division. Oak Ridge National Laboratory. US DEPARTMENT OF ENERGY under contract DE-AC05-00OR22725.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=A+Critical+Literature+Review+of+Defrost+Technologies+for+Heat+Pumps+and+Refrigeration+Systems&rft.pub=Energy+and+Transportation+Sciences+Division.+Oak+Ridge+National+Laboratory.+US+DEPARTMENT+OF+ENERGY+under+contract+DE-AC05-00OR22725&rft.date=2018-03-31&rft.aulast=Nawaz&rft.aufirst=Kashif&rft.au=Elatar%2C+Ahmed&rft.au=Fricke%2C+Brian&rft_id=https%3A%2F%2Finfo.ornl.gov%2Fsites%2Fpublications%2FFiles%2FPub117976.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-91"><a href="#cite_ref-91">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.nspower.ca/docs/default-source/pdf-to-upload/jc0006_ashley_heatpump101onepager-(3).pdf?sfvrsn=811939d7_0#:~:text=Keeping%20the%20filters%20and%20coils,and%20can%20be%20performed%20easily.&text=Keeping%20the%20outdoor%20unit%20clear,and%20debris%20is%20also%20important.&text=An%20annual%20maintenance%20check%20of,recommended%20by%20your%20installing%20contractor.">"HEAT PUMP 101: HOW TO TAKE CARE OF YOUR HEAT PUMP"</a> (PDF). Novia Scotia Power.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Novia+Scotia+Power&rft.atitle=HEAT+PUMP+101%3A+HOW+TO+TAKE+CARE+OF+YOUR+HEAT+PUMP&rft_id=https%3A%2F%2Fwww.nspower.ca%2Fdocs%2Fdefault-source%2Fpdf-to-upload%2Fjc0006_ashley_heatpump101onepager-%283%29.pdf%3Fsfvrsn%3D811939d7_0%23%3A~%3Atext%3DKeeping%2520the%2520filters%2520and%2520coils%2Cand%2520can%2520be%2520performed%2520easily.%26text%3DKeeping%2520the%2520outdoor%2520unit%2520clear%2Cand%2520debris%2520is%2520also%2520important.%26text%3DAn%2520annual%2520maintenance%2520check%2520of%2Crecommended%2520by%2520your%2520installing%2520contractor.&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-92"><a href="#cite_ref-92">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFJohnson2013" class="citation web cs1">Johnson, R.K. (September 2013). <a rel="nofollow" class="external text" href="https://www.nrel.gov/docs/fy13osti/56393.pdf">"Measured Performance of a Low Temperature Air Source Heat Pump"</a> (PDF). The National Renewable Energy Laboratory. On behalf of the U.S. Department of Energy’s Building America Program. Office of Energy Efficiency and Renewable Energy. NREL Contract No. DE-AC36-08GO28308.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Measured+Performance+of+a+Low+Temperature+Air+Source+Heat+Pump&rft.pub=The+National+Renewable+Energy+Laboratory.+On+behalf+of+the+U.S.+Department+of+Energy%E2%80%99s+Building+America+Program.+Office+of+Energy+Efficiency+and+Renewable+Energy.+NREL+Contract+No.+DE-AC36-08GO28308&rft.date=2013-09&rft.aulast=Johnson&rft.aufirst=R.K.&rft_id=https%3A%2F%2Fwww.nrel.gov%2Fdocs%2Ffy13osti%2F56393.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-93"><a href="#cite_ref-93">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFJianhuiGuoyuanShuxue2020" class="citation journal cs1">Jianhui, Niu; Guoyuan, Ma; Shuxue, Xu (20 January 2020). <a rel="nofollow" class="external text" href="https://onlinelibrary.wiley.com/doi/abs/10.1002/er.5098">"Experimental study on the performance of air source heat pump system with multiple parallel outdoor units"</a>. International Journal of Energy Research. 44 (4): 2819–2832. <a href="/wiki/Bibcode_(identifier)" class="mw-redirect" title="Bibcode (identifier)">Bibcode</a>:<a rel="nofollow" class="external text" href="https://ui.adsabs.harvard.edu/abs/2020IJER...44.2819J">2020IJER...44.2819J</a>. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1002%2Fer.5098">10.1002/er.5098</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=International+Journal+of+Energy+Research&rft.atitle=Experimental+study+on+the+performance+of+air+source+heat+pump+system+with+multiple+parallel+outdoor+units&rft.volume=44&rft.issue=4&rft.pages=2819-2832&rft.date=2020-01-20&rft_id=info%3Adoi%2F10.1002%2Fer.5098&rft_id=info%3Abibcode%2F2020IJER...44.2819J&rft.aulast=Jianhui&rft.aufirst=Niu&rft.au=Guoyuan%2C+Ma&rft.au=Shuxue%2C+Xu&rft_id=https%3A%2F%2Fonlinelibrary.wiley.com%2Fdoi%2Fabs%2F10.1002%2Fer.5098&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-94"><a href="#cite_ref-94">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFLongJiankaiYiqiangYang2014" class="citation journal cs1">Long, Zhang; Jiankai, Dong; Yiqiang, Jiang; Yang, Yao (15 November 2014). <a rel="nofollow" class="external text" href="https://www.sciencedirect.com/science/article/pii/S0306261914007211">"A novel defrosting method using heat energy dissipated by the compressor of an air source heat pump"</a>. Applied Energy. 133: 101–111. <a href="/wiki/Bibcode_(identifier)" class="mw-redirect" title="Bibcode (identifier)">Bibcode</a>:<a rel="nofollow" class="external text" href="https://ui.adsabs.harvard.edu/abs/2014ApEn..133..101L">2014ApEn..133..101L</a>. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1016%2Fj.apenergy.2014.07.039">10.1016/j.apenergy.2014.07.039</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Applied+Energy&rft.atitle=A+novel+defrosting+method+using+heat+energy+dissipated+by+the+compressor+of+an+air+source+heat+pump&rft.volume=133&rft.pages=101-111&rft.date=2014-11-15&rft_id=info%3Adoi%2F10.1016%2Fj.apenergy.2014.07.039&rft_id=info%3Abibcode%2F2014ApEn..133..101L&rft.aulast=Long&rft.aufirst=Zhang&rft.au=Jiankai%2C+Dong&rft.au=Yiqiang%2C+Jiang&rft.au=Yang%2C+Yao&rft_id=https%3A%2F%2Fwww.sciencedirect.com%2Fscience%2Farticle%2Fpii%2FS0306261914007211&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-95"><a href="#cite_ref-95">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFHigaHorwitzBuendiaMcHugh2024" class="citation journal cs1">Higa, Randall; Horwitz, Matt; Buendia, Jose; McHugh, Jon; Haile, James; Heinemeier, Kristin (2024). <a rel="nofollow" class="external text" href="https://www.aceee.org/sites/default/files/proceedings/ssb24/pdfs/Applicability%20of%20Cold%20Climate%20Heat%20Pumps%20in%20California.pdf">"Yeah, But It's a Dry Cold: Applicability of Cold Climate Heat Pumps in California"</a> (PDF). Summer Study on Energy Efficiency in Buildings. ACEE.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Summer+Study+on+Energy+Efficiency+in+Buildings&rft.atitle=Yeah%2C+But+It%27s+a+Dry+Cold%3A+Applicability+of+Cold+Climate+Heat+Pumps+in+California&rft.date=2024&rft.aulast=Higa&rft.aufirst=Randall&rft.au=Horwitz%2C+Matt&rft.au=Buendia%2C+Jose&rft.au=McHugh%2C+Jon&rft.au=Haile%2C+James&rft.au=Heinemeier%2C+Kristin&rft_id=https%3A%2F%2Fwww.aceee.org%2Fsites%2Fdefault%2Ffiles%2Fproceedings%2Fssb24%2Fpdfs%2FApplicability%2520of%2520Cold%2520Climate%2520Heat%2520Pumps%2520in%2520California.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-96"><a href="#cite_ref-96">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFMendonKeeneRosenbergRotondo2024" class="citation journal cs1">Mendon, Vrushali; Keene, Kevin; Rosenberg, Sam; Rotondo, Julia; Brambley, Dr. Michael; Young, Jim; Kazmi, Ali Akber; Delgoshaei, Dr. Payam (2024). <a rel="nofollow" class="external text" href="https://www.aceee.org/sites/default/files/proceedings/ssb24/pdfs/Rising%20up%20to%20the%20Challenge%20-%20Cold%20Climate%20Heat%20Pumps%20in%20the%20Field.pdf">"Rising Up to the Challenge: Cold Climate Heat Pumps in the Field"</a> (PDF). Summer Study on Energy Efficiency in Buildings. ACEE.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Summer+Study+on+Energy+Efficiency+in+Buildings&rft.atitle=Rising+Up+to+the+Challenge%3A+Cold+Climate+Heat+Pumps+in+the+Field&rft.date=2024&rft.aulast=Mendon&rft.aufirst=Vrushali&rft.au=Keene%2C+Kevin&rft.au=Rosenberg%2C+Sam&rft.au=Rotondo%2C+Julia&rft.au=Brambley%2C+Dr.+Michael&rft.au=Young%2C+Jim&rft.au=Kazmi%2C+Ali+Akber&rft.au=Delgoshaei%2C+Dr.+Payam&rft_id=https%3A%2F%2Fwww.aceee.org%2Fsites%2Fdefault%2Ffiles%2Fproceedings%2Fssb24%2Fpdfs%2FRising%2520up%2520to%2520the%2520Challenge%2520-%2520Cold%2520Climate%2520Heat%2520Pumps%2520in%2520the%2520Field.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-97"><a href="#cite_ref-97">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.ecohome.net/guides/3699/heat-pump-buying-guide-which-are-the-best-heat-pumps/">"Which Heat Pump is the Best for Reliability & Efficiency 2023?"</a>. www.ecohome.net. Retrieved 18 September 2023.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=www.ecohome.net&rft.atitle=Which+Heat+Pump+is+the+Best+for+Reliability+%26+Efficiency+2023%3F&rft_id=https%3A%2F%2Fwww.ecohome.net%2Fguides%2F3699%2Fheat-pump-buying-guide-which-are-the-best-heat-pumps%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-98"><a href="#cite_ref-98">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.cnet.com/home/energy-and-utilities/heat-pump-vs-furnace-which-heat-source-is-right-for-your-home/">"Heat Pump vs. Furnace: Which Heat Source Is Right for Your Home?"</a>. CNET. Retrieved 18 September 2023.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=CNET&rft.atitle=Heat+Pump+vs.+Furnace%3A+Which+Heat+Source+Is+Right+for+Your+Home%3F&rft_id=https%3A%2F%2Fwww.cnet.com%2Fhome%2Fenergy-and-utilities%2Fheat-pump-vs-furnace-which-heat-source-is-right-for-your-home%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-99"><a href="#cite_ref-99">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.consumerreports.org/appliances/heat-pumps/most-and-least-reliable-heat-pumps-a2741062924/">"Most and Least Reliable Heat Pump Brands"</a>. Consumer Reports. 7 April 2023. Retrieved 18 September 2023.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Consumer+Reports&rft.atitle=Most+and+Least+Reliable+Heat+Pump+Brands&rft.date=2023-04-07&rft_id=https%3A%2F%2Fwww.consumerreports.org%2Fappliances%2Fheat-pumps%2Fmost-and-least-reliable-heat-pumps-a2741062924%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-100"><a href="#cite_ref-100">^</a> <a rel="nofollow" class="external text" href="https://www.chuden.co.jp/resource/seicho_kaihatsu/kaihatsu/kai_library/news/news_2010/news_100_02_N09627.pdf">Fusanosuke Kuhara used CO2 gas compressed Cryocooler in 1917.</a> <a rel="nofollow" class="external text" href="https://web.archive.org/web/20220710110245/https://www.chuden.co.jp/resource/seicho_kaihatsu/kaihatsu/kai_library/news/news_2010/news_100_02_N09627.pdf">Archived</a> 2022-07-10 at the <a href="/wiki/Wayback_Machine" title="Wayback Machine">Wayback Machine</a> 2nd Page numbered 28, right side line 3-6. <a href="/wiki/Fusanosuke_Kuhara" title="Fusanosuke Kuhara">Fusanosuke Kuhara</a> attached CO2 gas compressed <a href="/wiki/Cryocooler" title="Cryocooler">Cryocooler</a> with approx. 6,400<a href="/wiki/Calorie" title="Calorie">kcal</a>/<a href="/wiki/Hour" title="Hour">h</a> in his home in 1917. In Japanese: 冷凍機が冷房用として使用されたのは1917年久原房之助が神戸の私邸に約6400kcal/h炭酸ガス圧縮機を取り付け、室内を冷やしたのが最初といわれています。 </li> <li id="cite_note-discoverCO2-101">^ <a href="#cite_ref-discoverCO2_101-0">a</a> <a href="#cite_ref-discoverCO2_101-1">b</a> <a rel="nofollow" class="external text" href="http://www.shecco.com/about/history.php">The rediscovery of CO2</a> <a rel="nofollow" class="external text" href="https://web.archive.org/web/20071007040239/http://www.shecco.com/about/history.php">Archived</a> 2007-10-07 at the <a href="/wiki/Wayback_Machine" title="Wayback Machine">Wayback Machine</a> SHECCO </li> <li id="cite_note-102"><a href="#cite_ref-102">^</a> <a rel="nofollow" class="external text" href="https://ci.nii.ac.jp/ncid/BA54218170">Natural Working Fluids '98, IIR - Gustav Lorentzen Conference</a>: <a href="/wiki/CiNii" title="CiNii">CiNii</a> <a rel="nofollow" class="external text" href="https://web.archive.org/web/20240227080144/https://ci.nii.ac.jp/ncid/BA54218170">Archived</a> 2024-02-27 at the <a href="/wiki/Wayback_Machine" title="Wayback Machine">Wayback Machine</a> </li> <li id="cite_note-103"><a href="#cite_ref-103">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFKuwajima2023" class="citation web cs1">Kuwajima, Hiroto (8 September 2023). <a rel="nofollow" class="external text" href="https://japan-forward.com/panasonic-amps-up-production-of-eco-cute-water-heaters/">"Panasonic Amps Up Production of Eco Cute Water Heaters | JAPAN Forward"</a>. japan-forward.com. Retrieved 28 May 2024.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=japan-forward.com&rft.atitle=Panasonic+Amps+Up+Production+of+Eco+Cute+Water+Heaters+%7C+JAPAN+Forward&rft.date=2023-09-08&rft.aulast=Kuwajima&rft.aufirst=Hiroto&rft_id=https%3A%2F%2Fjapan-forward.com%2Fpanasonic-amps-up-production-of-eco-cute-water-heaters%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> <li id="cite_note-104"><a href="#cite_ref-104">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation news cs1"><a rel="nofollow" class="external text" href="https://www.washingtonpost.com/business/energy/2023/05/17/energy-transition-who-wants-to-become-a-heat-pump-billionaire/393c2a9e-f46a-11ed-918d-012572d64930_story.html">"Who Wants to Become a Heat-Pump Billionaire?"</a>. <a href="/wiki/The_Washington_Post" title="The Washington Post">The Washington Post</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=The+Washington+Post&rft.atitle=Who+Wants+to+Become+a+Heat-Pump+Billionaire%3F&rft_id=https%3A%2F%2Fwww.washingtonpost.com%2Fbusiness%2Fenergy%2F2023%2F05%2F17%2Fenergy-transition-who-wants-to-become-a-heat-pump-billionaire%2F393c2a9e-f46a-11ed-918d-012572d64930_story.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> </li> </ol></div> <div class="mw-heading mw-heading3"><h3 id="Sources">Sources</h3>[<a href="/w/index.php?title=Air_source_heat_pump&action=edit&section=17" title="Edit section: Sources">edit</a>]</div> <div class="mw-heading mw-heading4"><h4 id="IPCC_reports">IPCC reports</h4>[<a href="/w/index.php?title=Air_source_heat_pump&action=edit&section=18" title="Edit section: IPCC reports">edit</a>]</div> <ul><li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFIPCC_AR6_WG12021" class="citation book cs1"><a href="/wiki/IPCC" class="mw-redirect" title="IPCC">IPCC</a> (2021). Masson-Delmotte, V.; Zhai, P.; Pirani, A.; Connors, S. L.; et al. (eds.). <a rel="nofollow" class="external text" href="https://www.ipcc.ch/report/ar6/wg1/downloads/report/IPCC_AR6_WGI_Full_Report.pdf">Climate Change 2021: The Physical Science Basis</a> (PDF). Contribution of Working Group I to the <a href="/wiki/IPCC_Sixth_Assessment_Report" title="IPCC Sixth Assessment Report">Sixth Assessment Report</a> of the Intergovernmental Panel on Climate Change. Cambridge University Press (In Press).</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=Climate+Change+2021%3A+The+Physical+Science+Basis&rft.series=Contribution+of+Working+Group+I+to+the+Sixth+Assessment+Report+of+the+Intergovernmental+Panel+on+Climate+Change&rft.pub=Cambridge+University+Press+%28In+Press%29&rft.date=2021&rft.au=IPCC&rft_id=https%3A%2F%2Fwww.ipcc.ch%2Freport%2Far6%2Fwg1%2Fdownloads%2Freport%2FIPCC_AR6_WGI_Full_Report.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"> <ul><li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFIPCC_AR6_WG1_Ch72021" class="citation book cs1">Forster, P.; Storelvmo, T.; Armour, K.; Collins, W. (2021). <a rel="nofollow" class="external text" href="https://www.ipcc.ch/report/ar6/wg1/downloads/report/IPCC_AR6_WGI_Chapter07_SM.pdf">"Chapter 7: The Earth's energy budget, climate feedbacks, and climate sensitivity Supplementary Material"</a> (PDF). <a href="#CITEREFIPCC_AR6_WG12021">IPCC AR6 WG1 2021</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=bookitem&rft.atitle=Chapter+7%3A+The+Earth%27s+energy+budget%2C+climate+feedbacks%2C+and+climate+sensitivity+Supplementary+Material&rft.btitle=IPCC+AR6+WG1+2021&rft.date=2021&rft.aulast=Forster&rft.aufirst=P.&rft.au=Storelvmo%2C+T.&rft.au=Armour%2C+K.&rft.au=Collins%2C+W.&rft_id=https%3A%2F%2Fwww.ipcc.ch%2Freport%2Far6%2Fwg1%2Fdownloads%2Freport%2FIPCC_AR6_WGI_Chapter07_SM.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+source+heat+pump" class="Z3988"></li></ul></li></ul> <div class="navbox-styles"><style data-mw-deduplicate="TemplateStyles:r1129693374">.mw-parser-output .hlist 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.hlist td ol,.mw-parser-output .navbox .hlist td ul,.mw-parser-output .navbox td.hlist dl,.mw-parser-output .navbox td.hlist ol,.mw-parser-output .navbox td.hlist ul{padding:0.125em 0}.mw-parser-output .navbox .navbar{display:block;font-size:100%}.mw-parser-output .navbox-title .navbar{float:left;text-align:left;margin-right:0.5em}body.skin--responsive .mw-parser-output .navbox-image img{max-width:none!important}@media print{body.ns-0 .mw-parser-output .navbox{display:none!important}}</style></div><div role="navigation" class="navbox" aria-labelledby="Heating,_ventilation,_and_air_conditioning" style="vertical-align: middle;;padding:3px"><table class="nowraplinks mw-collapsible mw-collapsed navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><style data-mw-deduplicate="TemplateStyles:r1239400231">.mw-parser-output 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abbr{color:var(--color-base)!important}}@media print{.mw-parser-output .navbar{display:none!important}}</style><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:HVAC" title="Template:HVAC"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:HVAC" title="Template talk:HVAC"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:HVAC" title="Special:EditPage/Template:HVAC"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="Heating,_ventilation,_and_air_conditioning" style="font-size:114%;margin:0 4em"><a href="/wiki/Heating,_ventilation,_and_air_conditioning" title="Heating, ventilation, and air conditioning">Heating, ventilation, and air conditioning</a></div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%">Fundamental concepts</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0;text-align: middle;"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Air_changes_per_hour" title="Air changes per hour">Air changes per hour</a></li> <li><a href="/wiki/Bake-out" title="Bake-out">Bake-out</a></li> <li><a href="/wiki/Building_envelope" title="Building envelope">Building envelope</a></li> <li><a href="/wiki/Convection" title="Convection">Convection</a></li> <li><a href="/wiki/Dilution_(equation)" title="Dilution (equation)">Dilution</a></li> <li><a href="/wiki/Domestic_energy_consumption" title="Domestic energy consumption">Domestic energy consumption</a></li> <li><a href="/wiki/Enthalpy" title="Enthalpy">Enthalpy</a></li> <li><a href="/wiki/Fluid_dynamics" title="Fluid dynamics">Fluid dynamics</a></li> <li><a href="/wiki/Gas_compressor" class="mw-redirect" title="Gas compressor">Gas compressor</a></li> <li><a href="/wiki/Heat_pump_and_refrigeration_cycle" title="Heat pump and refrigeration cycle">Heat pump and refrigeration cycle</a></li> <li><a href="/wiki/Heat_transfer" title="Heat transfer">Heat transfer</a></li> <li><a href="/wiki/Humidity" title="Humidity">Humidity</a></li> <li><a href="/wiki/Infiltration_(HVAC)" title="Infiltration (HVAC)">Infiltration</a></li> <li><a href="/wiki/Latent_heat" title="Latent heat">Latent heat</a></li> <li><a href="/wiki/Noise_control" title="Noise control">Noise control</a></li> <li><a href="/wiki/Outgassing" title="Outgassing">Outgassing</a></li> <li><a href="/wiki/Particulates" title="Particulates">Particulates</a></li> <li><a href="/wiki/Psychrometrics" title="Psychrometrics">Psychrometrics</a></li> <li><a href="/wiki/Sensible_heat" title="Sensible heat">Sensible heat</a></li> <li><a href="/wiki/Stack_effect" title="Stack effect">Stack effect</a></li> <li><a href="/wiki/Thermal_comfort" title="Thermal comfort">Thermal comfort</a></li> <li><a href="/wiki/Thermal_destratification" title="Thermal destratification">Thermal destratification</a></li> <li><a href="/wiki/Thermal_mass" title="Thermal mass">Thermal mass</a></li> <li><a href="/wiki/Thermodynamics" title="Thermodynamics">Thermodynamics</a></li> <li><a href="/wiki/Vapour_pressure_of_water" title="Vapour pressure of water">Vapour pressure of water</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Technology</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0;text-align: middle;"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Absorption-compression_heat_pump" title="Absorption-compression heat pump">Absorption-compression heat pump</a></li> <li><a href="/wiki/Absorption_refrigerator" title="Absorption refrigerator">Absorption refrigerator</a></li> <li><a href="/wiki/Air_barrier" title="Air barrier">Air barrier</a></li> <li><a href="/wiki/Air_conditioning" title="Air conditioning">Air conditioning</a></li> <li><a href="/wiki/Antifreeze" title="Antifreeze">Antifreeze</a></li> <li><a href="/wiki/Automobile_air_conditioning" class="mw-redirect" title="Automobile air conditioning">Automobile air conditioning</a></li> <li><a href="/wiki/Autonomous_building" title="Autonomous building">Autonomous building</a></li> <li><a href="/wiki/Building_insulation_material" title="Building insulation material">Building insulation materials</a></li> <li><a href="/wiki/Central_heating" title="Central heating">Central heating</a></li> <li><a href="/wiki/Central_solar_heating" title="Central solar heating">Central solar heating</a></li> <li><a href="/wiki/Chilled_beam" title="Chilled beam">Chilled beam</a></li> <li><a href="/wiki/Chilled_water" title="Chilled water">Chilled water</a></li> <li><a href="/wiki/Constant_air_volume" title="Constant air volume">Constant air volume</a> (CAV)</li> <li><a href="/wiki/Coolant" title="Coolant">Coolant</a></li> <li><a href="/wiki/Cross_ventilation" title="Cross ventilation">Cross ventilation</a></li> <li><a href="/wiki/Dedicated_outdoor_air_system" title="Dedicated outdoor air system">Dedicated outdoor air system</a> (DOAS)</li> <li><a href="/wiki/Deep_water_source_cooling" title="Deep water source cooling">Deep water source cooling</a></li> <li><a href="/wiki/Demand_controlled_ventilation" title="Demand controlled ventilation">Demand controlled ventilation</a> (DCV)</li> <li><a href="/wiki/Displacement_ventilation" title="Displacement ventilation">Displacement ventilation</a></li> <li><a href="/wiki/District_cooling" title="District cooling">District cooling</a></li> <li><a href="/wiki/District_heating" title="District heating">District heating</a></li> <li><a href="/wiki/Electric_heating" title="Electric heating">Electric heating</a></li> <li><a href="/wiki/Energy_recovery_ventilation" class="mw-redirect" title="Energy recovery ventilation">Energy recovery ventilation</a> (ERV)</li> <li><a href="/wiki/Firestop" title="Firestop">Firestop</a></li> <li><a href="/wiki/Forced-air" title="Forced-air">Forced-air</a></li> <li><a href="/wiki/Forced-air_gas" title="Forced-air gas">Forced-air gas</a></li> <li><a href="/wiki/Free_cooling" title="Free cooling">Free cooling</a></li> <li><a href="/wiki/Heat_recovery_ventilation" title="Heat recovery ventilation">Heat recovery ventilation</a> (HRV)</li> <li><a href="/wiki/Hybrid_heat" title="Hybrid heat">Hybrid heat</a></li> <li><a href="/wiki/Hydronics" title="Hydronics">Hydronics</a></li> <li><a href="/wiki/Ice_storage_air_conditioning" title="Ice storage air conditioning">Ice storage air conditioning</a></li> <li><a href="/wiki/Kitchen_ventilation" title="Kitchen ventilation">Kitchen ventilation</a></li> <li><a href="/wiki/Mixed-mode_ventilation" title="Mixed-mode ventilation">Mixed-mode ventilation</a></li> <li><a href="/wiki/Microgeneration" title="Microgeneration">Microgeneration</a></li> <li><a href="/wiki/Passive_cooling" title="Passive cooling">Passive cooling</a></li> <li><a href="/wiki/Passive_daytime_radiative_cooling" title="Passive daytime radiative cooling">Passive daytime radiative cooling</a></li> <li><a href="/wiki/Passive_house" title="Passive house">Passive house</a></li> <li><a href="/wiki/Passive_ventilation" title="Passive ventilation">Passive ventilation</a></li> <li><a href="/wiki/Radiant_heating_and_cooling" title="Radiant heating and cooling">Radiant heating and cooling</a></li> <li><a href="/wiki/Radiant_cooling" class="mw-redirect" title="Radiant cooling">Radiant cooling</a></li> <li><a href="/wiki/Radiant_heating" class="mw-redirect" title="Radiant heating">Radiant heating</a></li> <li><a href="/wiki/Radon_mitigation" title="Radon mitigation">Radon mitigation</a></li> <li><a href="/wiki/Refrigeration" title="Refrigeration">Refrigeration</a></li> <li><a href="/wiki/Renewable_heat" title="Renewable heat">Renewable heat</a></li> <li><a href="/wiki/Room_air_distribution" title="Room air distribution">Room air distribution</a></li> <li><a href="/wiki/Solar_air_heat" title="Solar air heat">Solar air heat</a></li> <li><a href="/wiki/Solar_combisystem" title="Solar combisystem">Solar combisystem</a></li> <li><a href="/wiki/Solar_cooling" class="mw-redirect" title="Solar cooling">Solar cooling</a></li> <li><a href="/wiki/Solar_heating" class="mw-redirect" title="Solar heating">Solar heating</a></li> <li><a href="/wiki/Thermal_insulation" title="Thermal insulation">Thermal insulation</a></li> <li><a href="/wiki/Thermosiphon" title="Thermosiphon">Thermosiphon</a></li> <li><a href="/wiki/Underfloor_air_distribution" title="Underfloor air distribution">Underfloor air distribution</a></li> <li><a href="/wiki/Underfloor_heating" title="Underfloor heating">Underfloor heating</a></li> <li><a href="/wiki/Vapor_barrier" title="Vapor barrier">Vapor barrier</a></li> <li><a href="/wiki/Vapor-compression_refrigeration" title="Vapor-compression refrigeration">Vapor-compression refrigeration</a> (VCRS)</li> <li><a href="/wiki/Variable_air_volume" title="Variable air volume">Variable air volume</a> (VAV)</li> <li><a href="/wiki/Variable_refrigerant_flow" title="Variable refrigerant flow">Variable refrigerant flow</a> (VRF)</li> <li><a href="/wiki/Ventilation_(architecture)" title="Ventilation (architecture)">Ventilation</a></li> <li><a href="/wiki/Water_heat_recycling" title="Water heat recycling">Water heat recycling</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Components</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0;text-align: middle;"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Air_conditioner_inverter" class="mw-redirect" title="Air conditioner inverter">Air conditioner inverter</a></li> <li><a href="/wiki/Air_door" title="Air door">Air door</a></li> <li><a href="/wiki/Air_filter" title="Air filter">Air filter</a></li> <li><a href="/wiki/Air_handler" title="Air handler">Air handler</a></li> <li><a href="/wiki/Air_ioniser" title="Air ioniser">Air ionizer</a></li> <li><a href="/wiki/Air-mixing_plenum" title="Air-mixing plenum">Air-mixing plenum</a></li> <li><a href="/wiki/Air_purifier" title="Air purifier">Air purifier</a></li> <li><a class="mw-selflink selflink">Air source heat pump</a></li> <li><a href="/wiki/Attic_fan" title="Attic fan">Attic fan</a></li> <li><a href="/wiki/Automatic_balancing_valve" title="Automatic balancing valve">Automatic balancing valve</a></li> <li><a href="/wiki/Back_boiler" title="Back boiler">Back boiler</a></li> <li><a href="/wiki/Barrier_pipe" title="Barrier pipe">Barrier pipe</a></li> <li><a href="/wiki/Blast_damper" title="Blast damper">Blast damper</a></li> <li><a href="/wiki/Boiler" title="Boiler">Boiler</a></li> <li><a href="/wiki/Centrifugal_fan" title="Centrifugal fan">Centrifugal fan</a></li> <li><a href="/wiki/Ceramic_heater" title="Ceramic heater">Ceramic heater</a></li> <li><a href="/wiki/Chiller" title="Chiller">Chiller</a></li> <li><a href="/wiki/Condensate_pump" title="Condensate pump">Condensate pump</a></li> <li><a href="/wiki/Condenser_(heat_transfer)" title="Condenser (heat transfer)">Condenser</a></li> <li><a href="/wiki/Condensing_boiler" title="Condensing boiler">Condensing boiler</a></li> <li><a href="/wiki/Convection_heater" title="Convection heater">Convection heater</a></li> <li><a href="/wiki/Compressor" title="Compressor">Compressor</a></li> <li><a href="/wiki/Cooling_tower" title="Cooling tower">Cooling tower</a></li> <li><a href="/wiki/Damper_(flow)" title="Damper (flow)">Damper</a></li> <li><a href="/wiki/Dehumidifier" title="Dehumidifier">Dehumidifier</a></li> <li><a href="/wiki/Duct_(flow)" title="Duct (flow)">Duct</a></li> <li><a href="/wiki/Economizer" title="Economizer">Economizer</a></li> <li><a href="/wiki/Electrostatic_precipitator" title="Electrostatic precipitator">Electrostatic precipitator</a></li> <li><a href="/wiki/Evaporative_cooler" title="Evaporative cooler">Evaporative cooler</a></li> <li><a href="/wiki/Evaporator" title="Evaporator">Evaporator</a></li> <li><a href="/wiki/Exhaust_hood" class="mw-redirect" title="Exhaust hood">Exhaust hood</a></li> <li><a href="/wiki/Expansion_tank" title="Expansion tank">Expansion tank</a></li> <li><a href="/wiki/Fan_(machine)" title="Fan (machine)">Fan</a></li> <li><a href="/wiki/Fan_coil_unit" title="Fan coil unit">Fan coil unit</a></li> <li><a href="/wiki/Fan_filter_unit" title="Fan filter unit">Fan filter unit</a></li> <li><a href="/wiki/Fan_heater" title="Fan heater">Fan heater</a></li> <li><a href="/wiki/Fire_damper" title="Fire damper">Fire damper</a></li> <li><a href="/wiki/Fireplace" title="Fireplace">Fireplace</a></li> <li><a href="/wiki/Fireplace_insert" title="Fireplace insert">Fireplace insert</a></li> <li><a href="/wiki/Freeze_stat" title="Freeze stat">Freeze stat</a></li> <li><a href="/wiki/Flue" title="Flue">Flue</a></li> <li><a href="/wiki/Freon" title="Freon">Freon</a></li> <li><a href="/wiki/Fume_hood" title="Fume hood">Fume hood</a></li> <li><a href="/wiki/Furnace_(house_heating)" class="mw-redirect" title="Furnace (house heating)">Furnace</a></li> <li><a href="/wiki/Gas_compressor" class="mw-redirect" title="Gas compressor">Gas compressor</a></li> <li><a href="/wiki/Gas_heater" title="Gas heater">Gas heater</a></li> <li><a href="/wiki/Gasoline_heater" title="Gasoline heater">Gasoline heater</a></li> <li><a href="/wiki/Grease_duct" title="Grease duct">Grease duct</a></li> <li><a href="/wiki/Grille_(architecture)" title="Grille (architecture)">Grille</a></li> <li><a href="/wiki/Ground-coupled_heat_exchanger" title="Ground-coupled heat exchanger">Ground-coupled heat exchanger</a></li> <li><a href="/wiki/Ground_source_heat_pump" title="Ground source heat pump">Ground source heat pump</a></li> <li><a href="/wiki/Heat_exchanger" title="Heat exchanger">Heat exchanger</a></li> <li><a href="/wiki/Heat_pipe" title="Heat pipe">Heat pipe</a></li> <li><a href="/wiki/Heat_pump" title="Heat pump">Heat pump</a></li> <li><a href="/wiki/Heating_film" title="Heating film">Heating film</a></li> <li><a href="/wiki/Heating_system" title="Heating system">Heating system</a></li> <li><a href="/wiki/HEPA" title="HEPA">HEPA</a></li> <li><a href="/wiki/High_efficiency_glandless_circulating_pump" title="High efficiency glandless circulating pump">High efficiency glandless circulating pump</a></li> <li><a href="/wiki/High-pressure_cut-off_switch" class="mw-redirect" title="High-pressure cut-off switch">High-pressure cut-off switch</a></li> <li><a href="/wiki/Humidifier" title="Humidifier">Humidifier</a></li> <li><a href="/wiki/Infrared_heater" title="Infrared heater">Infrared heater</a></li> <li><a href="/wiki/Inverter_compressor" title="Inverter compressor">Inverter compressor</a></li> <li><a href="/wiki/Kerosene_heater" title="Kerosene heater">Kerosene heater</a></li> <li><a href="/wiki/Louver" title="Louver">Louver</a></li> <li><a href="/wiki/Mechanical_room" title="Mechanical room">Mechanical room</a></li> <li><a href="/wiki/Oil_heater" title="Oil heater">Oil heater</a></li> <li><a href="/wiki/Packaged_terminal_air_conditioner" title="Packaged terminal air conditioner">Packaged terminal air conditioner</a></li> <li><a href="/wiki/Plenum_space" title="Plenum space">Plenum space</a></li> <li><a href="/wiki/Pressurisation_ductwork" title="Pressurisation ductwork">Pressurisation ductwork</a></li> <li><a href="/wiki/Process_duct_work" title="Process duct work">Process duct work</a></li> <li><a href="/wiki/Radiator_(heating)" title="Radiator (heating)">Radiator</a></li> <li><a href="/wiki/Radiator_reflector" title="Radiator reflector">Radiator reflector</a></li> <li><a href="/wiki/Recuperator" title="Recuperator">Recuperator</a></li> <li><a href="/wiki/Refrigerant" title="Refrigerant">Refrigerant</a></li> <li><a href="/wiki/Register_(air_and_heating)" title="Register (air and heating)">Register</a></li> <li><a href="/wiki/Reversing_valve" title="Reversing valve">Reversing valve</a></li> <li><a href="/wiki/Run-around_coil" title="Run-around coil">Run-around coil</a></li> <li><a href="/wiki/Sail_switch" title="Sail switch">Sail switch</a></li> <li><a href="/wiki/Scroll_compressor" title="Scroll compressor">Scroll compressor</a></li> <li><a href="/wiki/Solar_chimney" title="Solar chimney">Solar chimney</a></li> <li><a href="/wiki/Solar-assisted_heat_pump" title="Solar-assisted heat pump">Solar-assisted heat pump</a></li> <li><a href="/wiki/Space_heater" title="Space heater">Space heater</a></li> <li><a href="/wiki/Smoke_canopy" title="Smoke canopy">Smoke canopy</a></li> <li><a href="/wiki/Smoke_damper" title="Smoke damper">Smoke damper</a></li> <li><a href="/wiki/Smoke_exhaust_ductwork" title="Smoke exhaust ductwork">Smoke exhaust ductwork</a></li> <li><a href="/wiki/Thermal_expansion_valve" title="Thermal expansion valve">Thermal expansion valve</a></li> <li><a href="/wiki/Thermal_wheel" title="Thermal wheel">Thermal wheel</a></li> <li><a href="/wiki/Thermostatic_radiator_valve" title="Thermostatic radiator valve">Thermostatic radiator valve</a></li> <li><a href="/wiki/Trickle_vent" title="Trickle vent">Trickle vent</a></li> <li><a href="/wiki/Trombe_wall" title="Trombe wall">Trombe wall</a></li> <li><a href="/wiki/TurboSwing" title="TurboSwing">TurboSwing</a></li> <li><a href="/wiki/Turning_vanes_(HVAC)" title="Turning vanes (HVAC)">Turning vanes</a></li> <li><a href="/wiki/Ultra-low_particulate_air" title="Ultra-low particulate air">Ultra-low particulate air</a> (ULPA)</li> <li><a href="/wiki/Whole-house_fan" title="Whole-house fan">Whole-house fan</a></li> <li><a href="/wiki/Windcatcher" title="Windcatcher">Windcatcher</a></li> <li><a href="/wiki/Wood-burning_stove" title="Wood-burning stove">Wood-burning stove</a></li> <li><a href="/wiki/Zone_valve" title="Zone valve">Zone valve</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Measurement and control</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0;text-align: middle;"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Air_flow_meter" title="Air flow meter">Air flow meter</a></li> <li><a href="/wiki/Aquastat" title="Aquastat">Aquastat</a></li> <li><a href="/wiki/BACnet" title="BACnet">BACnet</a></li> <li><a href="/wiki/Blower_door" title="Blower door">Blower door</a></li> <li><a href="/wiki/Building_automation" title="Building automation">Building automation</a></li> <li><a href="/wiki/Carbon_dioxide_sensor" title="Carbon dioxide sensor">Carbon dioxide sensor</a></li> <li><a href="/wiki/Clean_air_delivery_rate" title="Clean air delivery rate">Clean air delivery rate</a> (CADR)</li> <li><a href="/wiki/Control_valve" title="Control valve">Control valve</a></li> <li><a href="/wiki/Gas_detector" title="Gas detector">Gas detector</a></li> <li><a href="/wiki/Home_energy_monitor" title="Home energy monitor">Home energy monitor</a></li> <li><a href="/wiki/Humidistat" title="Humidistat">Humidistat</a></li> <li><a href="/wiki/HVAC_control_system" title="HVAC control system">HVAC control system</a></li> <li><a href="/wiki/Infrared_thermometer" title="Infrared thermometer">Infrared thermometer</a></li> <li><a href="/wiki/Intelligent_buildings" class="mw-redirect" title="Intelligent buildings">Intelligent buildings</a></li> <li><a href="/wiki/LonWorks" title="LonWorks">LonWorks</a></li> <li><a href="/wiki/Minimum_efficiency_reporting_value" title="Minimum efficiency reporting value">Minimum efficiency reporting value</a> (MERV)</li> <li><a href="/wiki/Normal_temperature_and_pressure" class="mw-redirect" title="Normal temperature and pressure">Normal temperature and pressure</a> (NTP)</li> <li><a href="/wiki/OpenTherm" title="OpenTherm">OpenTherm</a></li> <li><a href="/wiki/Programmable_communicating_thermostat" title="Programmable communicating thermostat">Programmable communicating thermostat</a></li> <li><a href="/wiki/Programmable_thermostat" title="Programmable thermostat">Programmable thermostat</a></li> <li><a href="/wiki/Psychrometrics" title="Psychrometrics">Psychrometrics</a></li> <li><a href="/wiki/Room_temperature" title="Room temperature">Room temperature</a></li> <li><a href="/wiki/Smart_thermostat" title="Smart thermostat">Smart thermostat</a></li> <li><a href="/wiki/Standard_temperature_and_pressure" title="Standard temperature and pressure">Standard temperature and pressure</a> (STP)</li> <li><a href="/wiki/Thermographic_camera" class="mw-redirect" title="Thermographic camera">Thermographic camera</a></li> <li><a href="/wiki/Thermostat" title="Thermostat">Thermostat</a></li> <li><a href="/wiki/Thermostatic_radiator_valve" title="Thermostatic radiator valve">Thermostatic radiator valve</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Professions, trades, and services</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0;text-align: middle;"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Architectural_acoustics" title="Architectural acoustics">Architectural acoustics</a></li> <li><a href="/wiki/Architectural_engineering" title="Architectural engineering">Architectural engineering</a></li> <li><a href="/wiki/Architectural_technologist" title="Architectural technologist">Architectural technologist</a></li> <li><a href="/wiki/Building_services_engineering" title="Building services engineering">Building services engineering</a></li> <li><a href="/wiki/Building_information_modeling" title="Building information modeling">Building information modeling</a> (BIM)</li> <li><a href="/wiki/Deep_energy_retrofit" title="Deep energy retrofit">Deep energy retrofit</a></li> <li><a href="/wiki/Duct_cleaning" class="mw-redirect" title="Duct cleaning">Duct cleaning</a></li> <li><a href="/wiki/Duct_leakage_testing" title="Duct leakage testing">Duct leakage testing</a></li> <li><a href="/wiki/Environmental_engineering" title="Environmental engineering">Environmental engineering</a></li> <li><a href="/wiki/Hydronic_balancing" title="Hydronic balancing">Hydronic balancing</a></li> <li><a href="/wiki/Kitchen_exhaust_cleaning" title="Kitchen exhaust cleaning">Kitchen exhaust cleaning</a></li> <li><a href="/wiki/Mechanical_engineering" title="Mechanical engineering">Mechanical engineering</a></li> <li><a href="/wiki/Mechanical,_electrical,_and_plumbing" title="Mechanical, electrical, and plumbing">Mechanical, electrical, and plumbing</a></li> <li><a href="/wiki/Mold_growth,_assessment,_and_remediation" class="mw-redirect" title="Mold growth, assessment, and remediation">Mold growth, assessment, and remediation</a></li> <li><a href="/wiki/Refrigerant_reclamation" title="Refrigerant reclamation">Refrigerant reclamation</a></li> <li><a href="/wiki/Testing,_adjusting,_balancing" title="Testing, adjusting, balancing">Testing, adjusting, balancing</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Industry organizations</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0;text-align: middle;"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Air_Conditioning,_Heating_and_Refrigeration_Institute" title="Air Conditioning, Heating and Refrigeration Institute">AHRI</a></li> <li><a href="/wiki/Air_Movement_and_Control_Association" title="Air Movement and Control Association">AMCA</a></li> <li><a href="/wiki/ASHRAE" title="ASHRAE">ASHRAE</a></li> <li><a href="/wiki/ASTM_International" title="ASTM International">ASTM International</a></li> <li><a href="/wiki/Building_Research_Establishment" title="Building Research Establishment">BRE</a></li> <li><a href="/wiki/BSRIA" title="BSRIA">BSRIA</a></li> <li><a href="/wiki/Chartered_Institution_of_Building_Services_Engineers" title="Chartered Institution of Building Services Engineers">CIBSE</a></li> <li><a href="/wiki/Institute_of_Refrigeration" title="Institute of Refrigeration">Institute of Refrigeration</a></li> <li><a href="/wiki/International_Institute_of_Refrigeration" title="International Institute of Refrigeration">IIR</a></li> <li><a href="/wiki/Leadership_in_Energy_and_Environmental_Design" class="mw-redirect" title="Leadership in Energy and Environmental Design">LEED</a></li> <li><a href="/wiki/Sheet_Metal_and_Air_Conditioning_Contractors%27_National_Association" title="Sheet Metal and Air Conditioning Contractors' National Association">SMACNA</a></li> <li><a href="/wiki/Uniform_Mechanical_Code" title="Uniform Mechanical Code">UMC</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Health and safety</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0;text-align: middle;"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Indoor_air_quality" title="Indoor air quality">Indoor air quality</a> (IAQ)</li> <li><a href="/wiki/Passive_smoking" title="Passive smoking">Passive smoking</a></li> <li><a href="/wiki/Sick_building_syndrome" title="Sick building syndrome">Sick building syndrome</a> (SBS)</li> <li><a href="/wiki/Volatile_organic_compound" title="Volatile organic compound">Volatile organic compound</a> (VOC)</li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">See also</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0;text-align: middle;"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/ASHRAE_Handbook" title="ASHRAE Handbook">ASHRAE Handbook</a></li> <li><a href="/wiki/Building_science" title="Building science">Building science</a></li> <li><a href="/wiki/Fireproofing" title="Fireproofing">Fireproofing</a></li> <li><a href="/wiki/Glossary_of_HVAC_terms" title="Glossary of HVAC terms">Glossary of HVAC terms</a></li> <li><a href="/wiki/Warm_Spaces" title="Warm Spaces">Warm Spaces</a></li> <li><a href="/wiki/World_Refrigeration_Day" title="World Refrigeration Day">World Refrigeration Day</a></li> <li><a href="/wiki/Template:Home_automation" title="Template:Home automation">Template:Home automation</a></li> <li><a href="/wiki/Template:Solar_energy" title="Template:Solar energy">Template:Solar energy</a></li></ul> </div></td></tr></tbody></table></div>    </div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?type=1x1" alt="" width="1" height="1" style="border: none; position: absolute;"></noscript> <div class="printfooter" data-nosnippet="">Retrieved from "<a dir="ltr" href="https://en.wikipedia.org/w/index.php?title=Air_source_heat_pump&oldid=1259972559">https://en.wikipedia.org/w/index.php?title=Air_source_heat_pump&oldid=1259972559</a>"</div></div> <div id="catlinks" class="catlinks" data-mw="interface"><div id="mw-normal-catlinks" class="mw-normal-catlinks"><a href="/wiki/Help:Category" 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