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A Full Explanation & Details (2024) | GreenMatch","yoastHead":"\n\n<meta name=\"description\" content=\"Find out what a combi boiler is and what the difference is between a combi boiler and other types of boilers.\" class=\"yoast-seo-meta-tag\" />\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" />\n<link rel=\"canonical\" href=\"https://www.greenmatch.co.uk/boilers/combi-boilers\" class=\"yoast-seo-meta-tag\" />\n<meta property=\"og:locale\" content=\"en_GB\" class=\"yoast-seo-meta-tag\" />\n<meta property=\"og:type\" content=\"article\" class=\"yoast-seo-meta-tag\" />\n<meta property=\"og:title\" content=\"What is a Combi Boiler? 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A Full Explanation &amp; Details</h1>\n","innerContent":["\n<h1 class=\"wp-block-heading\" id=\"what-is-a-combi\">What is a Combi Boiler? 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It does not require additional components such as hot water storage cylinders to work, making it a space-saving and, therefore, a popular choice among homeowners in the UK. In fact, it is the most commonly installed <a href=\"https://www.greenmatch.co.uk/blog/2019/06/best-boiler-to-buy#boiler-type\" data-anchor=\"#boiler-type\">type of boiler</a> in the country.</p>\n","innerContent":["\n<p>A combination or combi boiler is a compact boiler unit that can heat both your hot water and your central heating. It does not require additional components such as hot water storage cylinders to work, making it a space-saving and, therefore, a popular choice among homeowners in the UK. In fact, it is the most commonly installed <a href=\"https://www.greenmatch.co.uk/blog/2019/06/best-boiler-to-buy#boiler-type\" data-anchor=\"#boiler-type\">type of boiler</a> in the country.</p>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p>Combi boilers are easy to install and also to hide away in a kitchen cupboard or boiler cabinet. These features enable you to merge a combi boiler with your home’s style. On top of that, they are also very convenient. Combi boilers provide a fast supply of instant hot water since they take water directly from the mains and heat it as required. In this article, we will take a closer look at combi boilers, their specific types, how they work, their pros, cons, and costs.</p>\n","innerContent":["\n<p>Combi boilers are easy to install and also to hide away in a kitchen cupboard or boiler cabinet. These features enable you to merge a combi boiler with your home’s style. On top of that, they are also very convenient. Combi boilers provide a fast supply of instant hot water since they take water directly from the mains and heat it as required. In this article, we will take a closer look at combi boilers, their specific types, how they work, their pros, cons, and costs.</p>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p><em>Are you interested in a combi boiler? GreenMatch can help you find the one that best meets your needs. We will save you hours of research time and effort thanks to our team of heating experts and our nationwide network of partner installers. Ask for quotes now, and we will send you <strong>up to 3 tailor-made quotes</strong> for free. You are not obliged to accept any of them.</em></p>\n","innerContent":["\n<p><em>Are you interested in a combi boiler? GreenMatch can help you find the one that best meets your needs. We will save you hours of research time and effort thanks to our team of heating experts and our nationwide network of partner installers. Ask for quotes now, and we will send you <strong>up to 3 tailor-made quotes</strong> for free. You are not obliged to accept any of them.</em></p>\n"]},{"blockName":"acf/macro-cta-block","attrs":{"name":"acf/macro-cta-block","data":{"cta-block":67362,"_cta-block":"field_macro_cta_block_cta_block"},"mode":"preview","bindData":{"ctaPageFields":{"cta_block_title":"Get your best deal","cta_block_sub_title":"Quickly compare 3 FREE quotes","cta_block_usps":"<ul class=\"ul1\">\n<li class=\"li1\">Quotes from local engineers</li>\n<li class=\"li1\">Payment by finance available</li>\n<li class=\"li1\">Save up to £975</li>\n</ul>\n","cta_block_usps_image":{"ID":67205,"id":67205,"title":"person","filename":"person.png","filesize":53348,"url":"https://cdn.greenmatch.co.uk/cdn-cgi/image/format=auto/2/2023/03/person.png","link":"https://www.greenmatch.co.uk/cta-block/solar/person","alt":"","author":"1","description":"","caption":"","name":"person","status":"inherit","uploaded_to":67204,"date":"2023-03-24 15:51:17","modified":"2023-03-24 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QUOTES NOW","cta_block_button_description":"It only takes 30 seconds","cta_block_optimize_text":"Optimise your home and save the planet","cta_block_optimize_image":{"ID":67392,"id":67392,"title":"earth-globe-square","filename":"earth-globe-square.svg","filesize":8466,"url":"https://cdn.greenmatch.co.uk/cdn-cgi/image/format=auto/2/2023/03/earth-globe-square.svg","link":"https://www.greenmatch.co.uk/cta-block/boilers/earth-globe-square","alt":"Earth globe icon","author":"48","description":"","caption":"","name":"earth-globe-square","status":"inherit","uploaded_to":67362,"date":"2023-03-31 08:31:49","modified":"2023-03-31 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class=\"wp-block-group\">\n\n\n\n\n\n\n\n\n\n\n\n</div>\n","innerContent":["\n<div class=\"wp-block-group\">",null,"\n\n",null,"\n\n",null,"\n\n",null,"\n\n",null,"\n\n",null,"\n\n",null,"</div>\n"]},{"blockName":null,"attrs":[],"innerBlocks":[],"innerHTML":"\n\n","innerContent":["\n\n"]},{"blockName":"core/group","attrs":[],"innerBlocks":[{"blockName":"acf/macro-table-of-contents","attrs":{"name":"acf/macro-table-of-contents","data":{"heading":"","_heading":"field_macro_card_heading","list":"_What is a Combi Boiler? A Full Explanation &amp; Details #what-is-a-combi\r\nWhat type of heating is a combi boiler #What-Type-of-Heating-is-a-Combi-Boiler\r\nHow does a combination boiler work #How-Does-a-Combination-Boiler-Work\r\nAdvantages of a combi boiler #Advantages-of-a-Combi-Boiler\r\nDisadvantages of a combi boiler #Disadvantages-of-a-Combi-Boiler\r\nWhat should you consider when choosing a combi boiler #What-Should-You-Consider-When-Choosing-a-Combi-Boiler\r\nCost of a combination boiler #Cost-of-a-Combination-Boiler\r\nFAQ #FAQ","_list":"field_macro_card_list"},"mode":"edit","bindData":{"heading":"","list":"_What is a Combi Boiler? A Full Explanation &amp; Details #what-is-a-combi\r\nWhat type of heating is a combi boiler #What-Type-of-Heating-is-a-Combi-Boiler\r\nHow does a combination boiler work #How-Does-a-Combination-Boiler-Work\r\nAdvantages of a combi boiler #Advantages-of-a-Combi-Boiler\r\nDisadvantages of a combi boiler #Disadvantages-of-a-Combi-Boiler\r\nWhat should you consider when choosing a combi boiler #What-Should-You-Consider-When-Choosing-a-Combi-Boiler\r\nCost of a combination boiler #Cost-of-a-Combination-Boiler\r\nFAQ #FAQ","backgroundColor":null}},"innerBlocks":[],"innerHTML":"","innerContent":[],"isValid":true,"theme":"greenmatch"},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p></p>\n","innerContent":["\n<p></p>\n"]}],"innerHTML":"\n<div class=\"wp-block-group\">\n\n</div>\n","innerContent":["\n<div class=\"wp-block-group\">",null,"\n\n",null,"</div>\n"]},{"blockName":null,"attrs":[],"innerBlocks":[],"innerHTML":"\n\n","innerContent":["\n\n"]},{"blockName":"core/group","attrs":[],"innerBlocks":[{"blockName":"core/heading","attrs":[],"innerBlocks":[],"innerHTML":"\n<h2 class=\"wp-block-heading\" id=\"What-Type-of-Heating-is-a-Combi-Boiler\">What type of heating is a combi boiler?</h2>\n","innerContent":["\n<h2 class=\"wp-block-heading\" id=\"What-Type-of-Heating-is-a-Combi-Boiler\">What type of heating is a combi boiler?</h2>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p>Combi boilers are simple units. Usually, they are designed for wall-mounted installation. The most significant difference between their different types is the fuel they use. Currently, there are 4 main types of fuels for combi boilers: gas, oil, LPG (Liquified Petroleum Gas), and electricity.</p>\n","innerContent":["\n<p>Combi boilers are simple units. Usually, they are designed for wall-mounted installation. The most significant difference between their different types is the fuel they use. Currently, there are 4 main types of fuels for combi boilers: gas, oil, LPG (Liquified Petroleum Gas), and electricity.</p>\n"]},{"blockName":"core/heading","attrs":{"level":3},"innerBlocks":[],"innerHTML":"\n<h3 class=\"wp-block-heading\">Gas combination boilers</h3>\n","innerContent":["\n<h3 class=\"wp-block-heading\">Gas combination boilers</h3>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p>Gas combi boilers are the most common combi boilers in the UK. They run on natural gas sent to homes via the national gas grid. Even though natural gas is produced from fossil fuels, it is considered cleaner than oil and coal.</p>\n","innerContent":["\n<p>Gas combi boilers are the most common combi boilers in the UK. They run on natural gas sent to homes via the national gas grid. Even though natural gas is produced from fossil fuels, it is considered cleaner than oil and coal.</p>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p>Although they release CO2 into the atmosphere when running, all modern combi models have inbuilt <a href=\"https://www.greenmatch.co.uk/boilers/condensing/efficiency\" title=\"How Efficient is a Condensing Boiler?\">condensing technology</a> that makes them highly efficient heating units. This technology ensures that the heat usually lost out of the flue pipe is recycled back into the system.</p>\n","innerContent":["\n<p>Although they release CO2 into the atmosphere when running, all modern combi models have inbuilt <a href=\"https://www.greenmatch.co.uk/boilers/condensing/efficiency\" title=\"How Efficient is a Condensing Boiler?\">condensing technology</a> that makes them highly efficient heating units. This technology ensures that the heat usually lost out of the flue pipe is recycled back into the system.</p>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p>As a result, you can minimise energy consumption and, therefore, help the environment while keeping your heating bills low.</p>\n","innerContent":["\n<p>As a result, you can minimise energy consumption and, therefore, help the environment while keeping your heating bills low.</p>\n"]},{"blockName":"core/heading","attrs":{"level":3},"innerBlocks":[],"innerHTML":"\n<h3 class=\"wp-block-heading\">Oil combi boiler</h3>\n","innerContent":["\n<h3 class=\"wp-block-heading\">Oil combi boiler</h3>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p><a href=\"https://www.greenmatch.co.uk/boilers/combi-boilers/oil-fired-combi-boilers\">Oil combi boilers</a> are a cost-effective alternative for houses disconnected from the grid. However, they are not as space-saving as other combi boilers since you will need to store the fuel in an external tank. You must also order refills periodically to ensure you don’t run out of fuel.</p>\n","innerContent":["\n<p><a href=\"https://www.greenmatch.co.uk/boilers/combi-boilers/oil-fired-combi-boilers\">Oil combi boilers</a> are a cost-effective alternative for houses disconnected from the grid. However, they are not as space-saving as other combi boilers since you will need to store the fuel in an external tank. You must also order refills periodically to ensure you don’t run out of fuel.</p>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p>Modern oil combi boilers also have inbuilt condensing technology. Nevertheless, this fuel’s emissions intensity (measured in kilograms of CO2 equivalent per kWh) is higher than that of gas.</p>\n","innerContent":["\n<p>Modern oil combi boilers also have inbuilt condensing technology. Nevertheless, this fuel’s emissions intensity (measured in kilograms of CO2 equivalent per kWh) is higher than that of gas.</p>\n"]},{"blockName":"core/heading","attrs":{"level":3},"innerBlocks":[],"innerHTML":"\n<h3 class=\"wp-block-heading\">LPG combi boilers</h3>\n","innerContent":["\n<h3 class=\"wp-block-heading\">LPG combi boilers</h3>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p>These boilers run on Liquefied Petroleum Gas, which is a combined product of natural gas and oil extractions. They are also a suitable option for properties disconnected from the grid, with the advantage of being cheaper and slightly cleaner than oil. Many manufacturers already offer gas boilers that are compatible with LPG.</p>\n","innerContent":["\n<p>These boilers run on Liquefied Petroleum Gas, which is a combined product of natural gas and oil extractions. They are also a suitable option for properties disconnected from the grid, with the advantage of being cheaper and slightly cleaner than oil. Many manufacturers already offer gas boilers that are compatible with LPG.</p>\n"]},{"blockName":"core/heading","attrs":{"level":3},"innerBlocks":[],"innerHTML":"\n<h3 class=\"wp-block-heading\">Electric combi boilers</h3>\n","innerContent":["\n<h3 class=\"wp-block-heading\">Electric combi boilers</h3>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p><a href=\"https://www.greenmatch.co.uk/boilers/electric/combi\" title=\"Electric Combi Boilers\">Electric combi boilers</a> boast efficiency ratings of 99-100%, making them the most energy-efficient boiler type available. They don’t waste energy or release CO2 when working. However, they can only achieve a zero-emissions performance as long as the electricity powering them comes from renewable sources.</p>\n","innerContent":["\n<p><a href=\"https://www.greenmatch.co.uk/boilers/electric/combi\" title=\"Electric Combi Boilers\">Electric combi boilers</a> boast efficiency ratings of 99-100%, making them the most energy-efficient boiler type available. They don’t waste energy or release CO2 when working. However, they can only achieve a zero-emissions performance as long as the electricity powering them comes from renewable sources.</p>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p>In this regard, you could combine them with <a href=\"https://www.greenmatch.co.uk/solar-energy/solar-panels\" title=\"Solar Panels\">solar panels</a> or check whether your energy supplier favours the use of renewable sources in the energy mix.</p>\n","innerContent":["\n<p>In this regard, you could combine them with <a href=\"https://www.greenmatch.co.uk/solar-energy/solar-panels\" title=\"Solar Panels\">solar panels</a> or check whether your energy supplier favours the use of renewable sources in the energy mix.</p>\n"]},{"blockName":"core/heading","attrs":{"level":3},"innerBlocks":[],"innerHTML":"\n<h3 class=\"wp-block-heading\">Environmental impact of combi boilers</h3>\n","innerContent":["\n<h3 class=\"wp-block-heading\">Environmental impact of combi boilers</h3>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p>Although it varies greatly from case to case, we can get an overview of the environmental impact of combi boilers, depending on what fuel they use.</p>\n","innerContent":["\n<p>Although it varies greatly from case to case, we can get an overview of the environmental impact of combi boilers, depending on what fuel they use.</p>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p>For instance, looking at the data from the Energy Saving Trust comparing gas, oil, LPG, and electricity across the UK, we can draw some conclusions based on each fuel’s emission intensity.</p>\n","innerContent":["\n<p>For instance, looking at the data from the Energy Saving Trust comparing gas, oil, LPG, and electricity across the UK, we can draw some conclusions based on each fuel’s emission intensity.</p>\n"]},{"blockName":"core/html","attrs":[],"innerBlocks":[],"innerHTML":"\n<div class=\"table-responsive\"><table border=\"0\"><tbody><tr><th colspan=\"3\">Emission Intensity by Fuel (kilograms of CO2 equivalent per kWh)</th></tr><tr><td>&nbsp;</td><td><p><strong>England, Scotland and Wales</strong></p></td><td><p><strong>Northern Ireland</strong></p></td></tr><tr><td><p>Gas</p></td><td><p>0.213</p></td><td><p>0.213</p></td></tr><tr><td><p>Oil</p></td><td><p>0.298</p></td><td><p>0.298</p></td></tr><tr><td><p>LPG</p></td><td><p>0.240</p></td><td><p>0.240</p></td></tr><tr><td><p>Electricity</p></td><td><p>0.225</p></td><td><p>0.234</p></td></tr></tbody></table></div>\n","innerContent":["\n<div class=\"table-responsive\"><table border=\"0\"><tbody><tr><th colspan=\"3\">Emission Intensity by Fuel (kilograms of CO2 equivalent per kWh)</th></tr><tr><td>&nbsp;</td><td><p><strong>England, Scotland and Wales</strong></p></td><td><p><strong>Northern Ireland</strong></p></td></tr><tr><td><p>Gas</p></td><td><p>0.213</p></td><td><p>0.213</p></td></tr><tr><td><p>Oil</p></td><td><p>0.298</p></td><td><p>0.298</p></td></tr><tr><td><p>LPG</p></td><td><p>0.240</p></td><td><p>0.240</p></td></tr><tr><td><p>Electricity</p></td><td><p>0.225</p></td><td><p>0.234</p></td></tr></tbody></table></div>\n"]},{"blockName":"core/html","attrs":[],"innerBlocks":[],"innerHTML":"\n<p style=\"text-align: center\" class=\"fine-print\"><strong>Source:</strong> Energy Saving Trust (July 2023)</p>\n","innerContent":["\n<p style=\"text-align: center\" class=\"fine-print\"><strong>Source:</strong> Energy Saving Trust (July 2023)</p>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p>It is worth mentioning that data for electricity in the table above refers to the regions’ averages and assumes that it is electricity distributed through the national grid. This is why electricity’s emission intensity appears higher than that of natural gas, as the UK’s electricity generation relies mostly on fossil fuels at the moment.</p>\n","innerContent":["\n<p>It is worth mentioning that data for electricity in the table above refers to the regions’ averages and assumes that it is electricity distributed through the national grid. This is why electricity’s emission intensity appears higher than that of natural gas, as the UK’s electricity generation relies mostly on fossil fuels at the moment.</p>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p>If you manage to power your electric combi boiler with renewable sources (e.g. <a href=\"https://www.greenmatch.co.uk/solar-energy\" title=\"Solar Energy\">solar energy</a>), then its negative environmental impact will be minimal.</p>\n","innerContent":["\n<p>If you manage to power your electric combi boiler with renewable sources (e.g. <a href=\"https://www.greenmatch.co.uk/solar-energy\" title=\"Solar Energy\">solar energy</a>), then its negative environmental impact will be minimal.</p>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p>At GreenMatch, we are committed to helping you navigate the transition to more sustainable ways of heating your home. In this case, we recommend switching to <a href=\"https://www.greenmatch.co.uk/blog/low-carbon-heating\" title=\"Low Carbon Heating\">low-carbon systems</a> such as solar panels, <a href=\"https://www.greenmatch.co.uk/heat-pumps\" title=\"Heat Pump\">heat pumps</a>, or <a href=\"https://www.greenmatch.co.uk/boilers/biomass/domestic\" title=\"Domestic\">domestic biomass boilers</a>. However, despite becoming more affordable over time, these are still rather expensive alternatives.</p>\n","innerContent":["\n<p>At GreenMatch, we are committed to helping you navigate the transition to more sustainable ways of heating your home. In this case, we recommend switching to <a href=\"https://www.greenmatch.co.uk/blog/low-carbon-heating\" title=\"Low Carbon Heating\">low-carbon systems</a> such as solar panels, <a href=\"https://www.greenmatch.co.uk/heat-pumps\" title=\"Heat Pump\">heat pumps</a>, or <a href=\"https://www.greenmatch.co.uk/boilers/biomass/domestic\" title=\"Domestic\">domestic biomass boilers</a>. However, despite becoming more affordable over time, these are still rather expensive alternatives.</p>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p><em>If you are not ready yet to switch because of either technical or financing reasons, consider installing a highly-efficient electric or gas combi boiler. Our experts at GreenMatch can send you up to 3 free offers for these energy-efficient solutions tailored to your home's energy requirements from suppliers that operate near you.</em></p>\n","innerContent":["\n<p><em>If you are not ready yet to switch because of either technical or financing reasons, consider installing a highly-efficient electric or gas combi boiler. Our experts at GreenMatch can send you up to 3 free offers for these energy-efficient solutions tailored to your home's energy requirements from suppliers that operate near you.</em></p>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p><em>We advise you then compare these offers objectively to lock in the best deal. For instance, in a gas-heated home in England, Scotland or Wales, you could save up to £630 per year on your energy bills by installing a highly-efficient condensing combi boiler. Get started by clicking the button below.</em></p>\n","innerContent":["\n<p><em>We advise you then compare these offers objectively to lock in the best deal. For instance, in a gas-heated home in England, Scotland or Wales, you could save up to £630 per year on your energy bills by installing a highly-efficient condensing combi boiler. Get started by clicking the button below.</em></p>\n"]},{"blockName":"acf/macro-cta-block","attrs":{"name":"acf/macro-cta-block","data":{"cta-block":67362,"_cta-block":"field_macro_cta_block_cta_block"},"mode":"preview","bindData":{"ctaPageFields":{"cta_block_title":"Get your best deal","cta_block_sub_title":"Quickly compare 3 FREE quotes","cta_block_usps":"<ul class=\"ul1\">\n<li class=\"li1\">Quotes from local engineers</li>\n<li class=\"li1\">Payment by finance available</li>\n<li class=\"li1\">Save up to £975</li>\n</ul>\n","cta_block_usps_image":{"ID":67205,"id":67205,"title":"person","filename":"person.png","filesize":53348,"url":"https://cdn.greenmatch.co.uk/cdn-cgi/image/format=auto/2/2023/03/person.png","link":"https://www.greenmatch.co.uk/cta-block/solar/person","alt":"","author":"1","description":"","caption":"","name":"person","status":"inherit","uploaded_to":67204,"date":"2023-03-24 15:51:17","modified":"2023-03-24 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class=\"wp-block-group\">\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n</div>\n","innerContent":["\n<div class=\"wp-block-group\">",null,"\n\n",null,"\n\n",null,"\n\n",null,"\n\n",null,"\n\n",null,"\n\n",null,"\n\n",null,"\n\n",null,"\n\n",null,"\n\n",null,"\n\n",null,"\n\n",null,"\n\n",null,"\n\n",null,"\n\n",null,"\n\n",null,"\n\n",null,"\n\n",null,"\n\n",null,"\n\n",null,"\n\n",null,"\n\n",null,"\n\n",null,"\n\n",null,"\n\n",null,"</div>\n"]},{"blockName":null,"attrs":[],"innerBlocks":[],"innerHTML":"\n\n","innerContent":["\n\n"]},{"blockName":"core/group","attrs":[],"innerBlocks":[{"blockName":"core/heading","attrs":[],"innerBlocks":[],"innerHTML":"\n<h2 class=\"wp-block-heading\" id=\"How-Does-a-Combination-Boiler-Work\">How does a combination boiler work?</h2>\n","innerContent":["\n<h2 class=\"wp-block-heading\" id=\"How-Does-a-Combination-Boiler-Work\">How does a combination boiler work?</h2>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p>Although combi boilers may use different fuels, they all work almost the same way. Every time you turn on a tap or switch on the heating, your combi boiler will fire up and start heating the water that goes through the pipes across your home.</p>\n","innerContent":["\n<p>Although combi boilers may use different fuels, they all work almost the same way. Every time you turn on a tap or switch on the heating, your combi boiler will fire up and start heating the water that goes through the pipes across your home.</p>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p>During this process, the cold water from the mains passes over a highly efficient heat exchanger. The heat exchanger transfers most heat from the burnt gas (90% or more) to the cold water and then distributes it to the taps as needed.</p>\n","innerContent":["\n<p>During this process, the cold water from the mains passes over a highly efficient heat exchanger. The heat exchanger transfers most heat from the burnt gas (90% or more) to the cold water and then distributes it to the taps as needed.</p>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p>The hot water travels to a diverter, and then it is sent either to the pipes for your taps or out into the radiators. Once the water has circulated through the radiators, it is sent back around the circuit, reheated, and used again.</p>\n","innerContent":["\n<p>The hot water travels to a diverter, and then it is sent either to the pipes for your taps or out into the radiators. Once the water has circulated through the radiators, it is sent back around the circuit, reheated, and used again.</p>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p>A combination boiler produces a continuous flow of hot water; however, a slight decline in water pressure may occur if you simultaneously use more than one tap or shower. This makes combination boilers more suitable for smaller households with just one bathroom.</p>\n","innerContent":["\n<p>A combination boiler produces a continuous flow of hot water; however, a slight decline in water pressure may occur if you simultaneously use more than one tap or shower. This makes combination boilers more suitable for smaller households with just one bathroom.</p>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p>Nevertheless, there are combi boiler models powerful enough to meet the heating and hot water demand of houses with 4-5 bedrooms and 2 or more bathrooms.</p>\n","innerContent":["\n<p>Nevertheless, there are combi boiler models powerful enough to meet the heating and hot water demand of houses with 4-5 bedrooms and 2 or more bathrooms.</p>\n"]},{"blockName":"core/heading","attrs":{"level":3},"innerBlocks":[],"innerHTML":"\n<h3 class=\"wp-block-heading\">How does a combi boiler fit in your central heating system (diagram)?</h3>\n","innerContent":["\n<h3 class=\"wp-block-heading\">How does a combi boiler fit in your central heating system (diagram)?</h3>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p>With a combi boiler, you don’t need to install additional components such as a hot water cylinder or a feed water tank. In addition to extra space, this also means that no extra heat will be lost by keeping water hot inside a cylinder.</p>\n","innerContent":["\n<p>With a combi boiler, you don’t need to install additional components such as a hot water cylinder or a feed water tank. In addition to extra space, this also means that no extra heat will be lost by keeping water hot inside a cylinder.</p>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p>As you can see, combination boilers are potentially more energy-saving options than other types of boilers. Below we have included a combi boiler diagram showing how they operate.</p>\n","innerContent":["\n<p>As you can see, combination boilers are potentially more energy-saving options than other types of boilers. Below we have included a combi boiler diagram showing how they operate.</p>\n"]},{"blockName":"core/image","attrs":{"id":60322,"align":"center"},"innerBlocks":[],"innerHTML":"\n<figure class=\"wp-block-image aligncenter\"><img src=\"https://cdn.greenmatch.co.uk/cdn-cgi/image/format=auto/2/2022/10/gm-how_a_boiler_works.png\" alt=\"Combi boiler diagram\" class=\"wp-image-60322\" /></figure>\n","innerContent":["\n<figure class=\"wp-block-image aligncenter\"><img src=\"https://cdn.greenmatch.co.uk/cdn-cgi/image/format=auto/2/2022/10/gm-how_a_boiler_works.png\" alt=\"Combi boiler diagram\" class=\"wp-image-60322\" /></figure>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p>&nbsp;</p>\n","innerContent":["\n<p>&nbsp;</p>\n"]}],"innerHTML":"\n<div class=\"wp-block-group\">\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n</div>\n","innerContent":["\n<div class=\"wp-block-group\">",null,"\n\n",null,"\n\n",null,"\n\n",null,"\n\n",null,"\n\n",null,"\n\n",null,"\n\n",null,"\n\n",null,"\n\n",null,"\n\n",null,"</div>\n"]},{"blockName":null,"attrs":[],"innerBlocks":[],"innerHTML":"\n\n","innerContent":["\n\n"]},{"blockName":"core/group","attrs":[],"innerBlocks":[{"blockName":"core/heading","attrs":[],"innerBlocks":[],"innerHTML":"\n<h2 class=\"wp-block-heading\" id=\"Advantages-of-a-Combi-Boiler\">Advantages of a combi boiler</h2>\n","innerContent":["\n<h2 class=\"wp-block-heading\" id=\"Advantages-of-a-Combi-Boiler\">Advantages of a combi boiler</h2>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p>Combi boilers are the right solution for many homes because of their advantages. Here we’ve listed a few of them:</p>\n","innerContent":["\n<p>Combi boilers are the right solution for many homes because of their advantages. Here we’ve listed a few of them:</p>\n"]},{"blockName":"core/list","attrs":{"className":"checkmarks-colored"},"innerBlocks":[{"blockName":"core/list-item","attrs":[],"innerBlocks":[],"innerHTML":"\n<li><strong>Highly efficient</strong></li>\n","innerContent":["\n<li><strong>Highly efficient</strong></li>\n"]}],"innerHTML":"\n<ul class=\"wp-block-list checkmarks-colored\"></ul>\n","innerContent":["\n<ul class=\"wp-block-list checkmarks-colored\">",null,"</ul>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p>Due to condensing technology, modern combi boilers' efficiency is frequently over 92%. To put it into context, this means that for every £1 you spend on powering your boiler, only 8p is lost in the heating process. Old boilers’ efficiency could be as low as 70-80%, assuming their performance is still acceptable.</p>\n","innerContent":["\n<p>Due to condensing technology, modern combi boilers' efficiency is frequently over 92%. To put it into context, this means that for every £1 you spend on powering your boiler, only 8p is lost in the heating process. Old boilers’ efficiency could be as low as 70-80%, assuming their performance is still acceptable.</p>\n"]},{"blockName":"core/list","attrs":{"className":"checkmarks-colored"},"innerBlocks":[{"blockName":"core/list-item","attrs":[],"innerBlocks":[],"innerHTML":"\n<li><strong>Money-saving, with lower energy bills</strong></li>\n","innerContent":["\n<li><strong>Money-saving, with lower energy bills</strong></li>\n"]}],"innerHTML":"\n<ul class=\"wp-block-list checkmarks-colored\"></ul>\n","innerContent":["\n<ul class=\"wp-block-list checkmarks-colored\">",null,"</ul>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p>Look at the example above: 20-30p does not seem like much money but, added up over time, it is a considerable sum wasted. Combi boilers’ high-efficiency rating can help you cut off your energy bills. How much you can save depends on the efficiencies of your old boiler and the new combi you are replacing it with, as well as on your property size and type.</p>\n","innerContent":["\n<p>Look at the example above: 20-30p does not seem like much money but, added up over time, it is a considerable sum wasted. Combi boilers’ high-efficiency rating can help you cut off your energy bills. How much you can save depends on the efficiencies of your old boiler and the new combi you are replacing it with, as well as on your property size and type.</p>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p>For instance, replacing a 70% efficient old gas boiler with a highly efficient condensing combi boiler (90%+) in a detached house can save you around £630 per year. We have other in-depth resources that could help you determine <a href=\"https://www.greenmatch.co.uk/boilers/what-size-boiler-do-i-need\" target=\"_blank\" rel=\"noreferrer noopener\">what size boiler you need</a>.</p>\n","innerContent":["\n<p>For instance, replacing a 70% efficient old gas boiler with a highly efficient condensing combi boiler (90%+) in a detached house can save you around £630 per year. We have other in-depth resources that could help you determine <a href=\"https://www.greenmatch.co.uk/boilers/what-size-boiler-do-i-need\" target=\"_blank\" rel=\"noreferrer noopener\">what size boiler you need</a>.</p>\n"]},{"blockName":"core/list","attrs":{"className":"checkmarks-colored"},"innerBlocks":[{"blockName":"core/list-item","attrs":[],"innerBlocks":[],"innerHTML":"\n<li><strong>Hot water on demand</strong></li>\n","innerContent":["\n<li><strong>Hot water on demand</strong></li>\n"]}],"innerHTML":"\n<ul class=\"wp-block-list checkmarks-colored\"></ul>\n","innerContent":["\n<ul class=\"wp-block-list checkmarks-colored\">",null,"</ul>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p>With a combi, you get hot water from your taps whenever you need it. This is because combination boilers take their water supply directly from the mains, heat it, and send it to your water outlets right away.</p>\n","innerContent":["\n<p>With a combi, you get hot water from your taps whenever you need it. This is because combination boilers take their water supply directly from the mains, heat it, and send it to your water outlets right away.</p>\n"]},{"blockName":"core/list","attrs":{"className":"checkmarks-colored"},"innerBlocks":[{"blockName":"core/list-item","attrs":[],"innerBlocks":[],"innerHTML":"\n<li><strong>Small in size</strong></li>\n","innerContent":["\n<li><strong>Small in size</strong></li>\n"]}],"innerHTML":"\n<ul class=\"wp-block-list checkmarks-colored\"></ul>\n","innerContent":["\n<ul class=\"wp-block-list checkmarks-colored\">",null,"</ul>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p>Most combi boilers can be installed within a standard kitchen cupboard, thanks to their compact dimensions. Furthermore, they don't need water storage cylinders or feed tanks; thus, they can save space all around your house. It also makes installation quicker, easier, and potentially cheaper.</p>\n","innerContent":["\n<p>Most combi boilers can be installed within a standard kitchen cupboard, thanks to their compact dimensions. Furthermore, they don't need water storage cylinders or feed tanks; thus, they can save space all around your house. It also makes installation quicker, easier, and potentially cheaper.</p>\n"]}],"innerHTML":"\n<div class=\"wp-block-group\">\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n</div>\n","innerContent":["\n<div class=\"wp-block-group\">",null,"\n\n",null,"\n\n",null,"\n\n",null,"\n\n",null,"\n\n",null,"\n\n",null,"\n\n",null,"\n\n",null,"\n\n",null,"\n\n",null,"</div>\n"]},{"blockName":null,"attrs":[],"innerBlocks":[],"innerHTML":"\n\n","innerContent":["\n\n"]},{"blockName":"core/group","attrs":[],"innerBlocks":[{"blockName":"core/heading","attrs":[],"innerBlocks":[],"innerHTML":"\n<h2 class=\"wp-block-heading\" id=\"Disadvantages-of-a-Combi-Boiler\">Disadvantages of a combi boiler</h2>\n","innerContent":["\n<h2 class=\"wp-block-heading\" id=\"Disadvantages-of-a-Combi-Boiler\">Disadvantages of a combi boiler</h2>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p>Naturally, combi boilers also have some disadvantages. These are the main two:</p>\n","innerContent":["\n<p>Naturally, combi boilers also have some disadvantages. These are the main two:</p>\n"]},{"blockName":"core/list","attrs":[],"innerBlocks":[{"blockName":"core/list-item","attrs":[],"innerBlocks":[],"innerHTML":"\n<li><strong>Not suitable for large homes with multiple bathrooms</strong></li>\n","innerContent":["\n<li><strong>Not suitable for large homes with multiple bathrooms</strong></li>\n"]}],"innerHTML":"\n<ul class=\"wp-block-list\"></ul>\n","innerContent":["\n<ul class=\"wp-block-list\">",null,"</ul>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p>Most combi boilers aren't powerful enough to meet great demands for hot water in houses with 2 or more bathrooms, especially if they are used at the same time. Despite some combi models being capable of doing so, you might want to consider a <a href=\"https://www.greenmatch.co.uk/boilers/system\">system boiler</a> instead.</p>\n","innerContent":["\n<p>Most combi boilers aren't powerful enough to meet great demands for hot water in houses with 2 or more bathrooms, especially if they are used at the same time. Despite some combi models being capable of doing so, you might want to consider a <a href=\"https://www.greenmatch.co.uk/boilers/system\">system boiler</a> instead.</p>\n"]},{"blockName":"core/list","attrs":[],"innerBlocks":[{"blockName":"core/list-item","attrs":[],"innerBlocks":[],"innerHTML":"\n<li><strong>Not ideal for homes with weak mains pressure</strong></li>\n","innerContent":["\n<li><strong>Not ideal for homes with weak mains pressure</strong></li>\n"]}],"innerHTML":"\n<ul class=\"wp-block-list\"></ul>\n","innerContent":["\n<ul class=\"wp-block-list\">",null,"</ul>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p>Similarly, a combination boiler may struggle to keep a proper flow of water to your taps if your mains pressure is already low. To solve it, you could install an additional pump to strengthen the flow. However, this device comes at an extra cost.</p>\n","innerContent":["\n<p>Similarly, a combination boiler may struggle to keep a proper flow of water to your taps if your mains pressure is already low. To solve it, you could install an additional pump to strengthen the flow. However, this device comes at an extra cost.</p>\n"]},{"blockName":"core/heading","attrs":[],"innerBlocks":[],"innerHTML":"\n<h2 class=\"wp-block-heading\" id=\"What-Should-You-Consider-When-Choosing-a-Combi-Boiler\">What should you consider when choosing a combi boiler?</h2>\n","innerContent":["\n<h2 class=\"wp-block-heading\" id=\"What-Should-You-Consider-When-Choosing-a-Combi-Boiler\">What should you consider when choosing a combi boiler?</h2>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p>When looking for a combi boiler for your home, you should consider its brand, type of fuel, output rating, efficiency, warranty, and price. There might be some other special features you are looking for, but these 6 are essential.</p>\n","innerContent":["\n<p>When looking for a combi boiler for your home, you should consider its brand, type of fuel, output rating, efficiency, warranty, and price. There might be some other special features you are looking for, but these 6 are essential.</p>\n"]},{"blockName":"core/list","attrs":[],"innerBlocks":[{"blockName":"core/list-item","attrs":[],"innerBlocks":[],"innerHTML":"\n<li><strong>Brand</strong></li>\n","innerContent":["\n<li><strong>Brand</strong></li>\n"]}],"innerHTML":"\n<ul class=\"wp-block-list\"></ul>\n","innerContent":["\n<ul class=\"wp-block-list\">",null,"</ul>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p>Getting a combi boiler from a reputable brand is always a plus. This way, you can rest assured that you have bought a reliable, high-quality boiler. Usually, customer services from top brands are also of a higher quality. You can also look at our section on <a href=\"https://www.greenmatch.co.uk/boilers/brands\" title=\"Brands\">boiler brands</a> to know which is the best combi boiler on the market for you!</p>\n","innerContent":["\n<p>Getting a combi boiler from a reputable brand is always a plus. This way, you can rest assured that you have bought a reliable, high-quality boiler. Usually, customer services from top brands are also of a higher quality. You can also look at our section on <a href=\"https://www.greenmatch.co.uk/boilers/brands\" title=\"Brands\">boiler brands</a> to know which is the best combi boiler on the market for you!</p>\n"]},{"blockName":"core/list","attrs":[],"innerBlocks":[{"blockName":"core/list-item","attrs":[],"innerBlocks":[],"innerHTML":"\n<li><strong>Type of fuel</strong></li>\n","innerContent":["\n<li><strong>Type of fuel</strong></li>\n"]}],"innerHTML":"\n<ul class=\"wp-block-list\"></ul>\n","innerContent":["\n<ul class=\"wp-block-list\">",null,"</ul>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p>As we explained above, <a href=\"#What-Type-of-Heating-is-a-Combi-Boiler\">combi boilers can run on different types of fuels</a>. Make sure to select one that fits your needs, as each of them has different advantages.</p>\n","innerContent":["\n<p>As we explained above, <a href=\"#What-Type-of-Heating-is-a-Combi-Boiler\">combi boilers can run on different types of fuels</a>. Make sure to select one that fits your needs, as each of them has different advantages.</p>\n"]},{"blockName":"core/list","attrs":[],"innerBlocks":[{"blockName":"core/list-item","attrs":[],"innerBlocks":[],"innerHTML":"\n<li><strong>Output rating</strong></li>\n","innerContent":["\n<li><strong>Output rating</strong></li>\n"]}],"innerHTML":"\n<ul class=\"wp-block-list\"></ul>\n","innerContent":["\n<ul class=\"wp-block-list\">",null,"</ul>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p>A combi boiler’s output rating is its power, measured in kilowatts (kW). Combi boilers have two output ratings: one for central heating (CH) and another for domestic hot water (DHW).</p>\n","innerContent":["\n<p>A combi boiler’s output rating is its power, measured in kilowatts (kW). Combi boilers have two output ratings: one for central heating (CH) and another for domestic hot water (DHW).</p>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p>Compared to regular and system boilers, combi boilers need to be more powerful to achieve the same result. Therefore, the <a href=\"https://www.greenmatch.co.uk/blog/best-boiler-4-bedroom-house\">best combi boiler for a 4 bedroom house</a> should have a higher power output than one for smaller homes. The table below shows the approximate combi boiler output ranges meeting the central heating requirements of different houses.</p>\n","innerContent":["\n<p>Compared to regular and system boilers, combi boilers need to be more powerful to achieve the same result. Therefore, the <a href=\"https://www.greenmatch.co.uk/blog/best-boiler-4-bedroom-house\">best combi boiler for a 4 bedroom house</a> should have a higher power output than one for smaller homes. The table below shows the approximate combi boiler output ranges meeting the central heating requirements of different houses.</p>\n"]},{"blockName":"core/html","attrs":[],"innerBlocks":[],"innerHTML":"\n<div class=\"table-responsive\"><table border=\"0\"><tbody><tr><th colspan=\"2\">Approximate Combi Boiler Output Rating (CH Output)</th></tr><tr><td><p>Houses with up to 10 radiators (up to 4 bedrooms)</p></td><td><p>24-27 kW</p></td></tr><tr><td><p>Houses with 10-15 radiators (4-5 bedrooms)</p></td><td><p>28-34 kW</p></td></tr><tr><td><p>Houses with 15-20 radiators (5+ bedrooms)</p></td><td><p>35-42 kW</p></td></tr></tbody></table></div>\n","innerContent":["\n<div class=\"table-responsive\"><table border=\"0\"><tbody><tr><th colspan=\"2\">Approximate Combi Boiler Output Rating (CH Output)</th></tr><tr><td><p>Houses with up to 10 radiators (up to 4 bedrooms)</p></td><td><p>24-27 kW</p></td></tr><tr><td><p>Houses with 10-15 radiators (4-5 bedrooms)</p></td><td><p>28-34 kW</p></td></tr><tr><td><p>Houses with 15-20 radiators (5+ bedrooms)</p></td><td><p>35-42 kW</p></td></tr></tbody></table></div>\n"]},{"blockName":"core/list","attrs":[],"innerBlocks":[{"blockName":"core/list-item","attrs":[],"innerBlocks":[],"innerHTML":"\n<li><strong>Efficiency</strong></li>\n","innerContent":["\n<li><strong>Efficiency</strong></li>\n"]}],"innerHTML":"\n<ul class=\"wp-block-list\"></ul>\n","innerContent":["\n<ul class=\"wp-block-list\">",null,"</ul>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p>Boilers receive an energy efficiency rating from A (highest) to G (lowest) on an ABC banding scale known as the ErP rating.</p>\n","innerContent":["\n<p>Boilers receive an energy efficiency rating from A (highest) to G (lowest) on an ABC banding scale known as the ErP rating.</p>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p>All modern gas boilers are highly efficient. Most of them are A-rated, but it is also worth checking their efficiency rating out of 100%. The closer they are to 100%, the lower your bills.</p>\n","innerContent":["\n<p>All modern gas boilers are highly efficient. Most of them are A-rated, but it is also worth checking their efficiency rating out of 100%. The closer they are to 100%, the lower your bills.</p>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p>Electric combi boilers, on the other hand, boast 99-100% efficiency ratings. However, many of them have an ErP D-rating. This is because most electricity is generated by burning fossil fuels. Therefore, it is considered carbon-intensive and not very efficient.</p>\n","innerContent":["\n<p>Electric combi boilers, on the other hand, boast 99-100% efficiency ratings. However, many of them have an ErP D-rating. This is because most electricity is generated by burning fossil fuels. Therefore, it is considered carbon-intensive and not very efficient.</p>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p>If renewable energy generation keeps growing steadily, we might see the ErP rating given to electric combi boilers improve in the near future.</p>\n","innerContent":["\n<p>If renewable energy generation keeps growing steadily, we might see the ErP rating given to electric combi boilers improve in the near future.</p>\n"]},{"blockName":"core/list","attrs":[],"innerBlocks":[{"blockName":"core/list-item","attrs":[],"innerBlocks":[],"innerHTML":"\n<li><strong>Warranty</strong></li>\n","innerContent":["\n<li><strong>Warranty</strong></li>\n"]}],"innerHTML":"\n<ul class=\"wp-block-list\"></ul>\n","innerContent":["\n<ul class=\"wp-block-list\">",null,"</ul>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p>Manufacturers provide different warranties for different combi boilers in their range. Terms and conditions may also vary. When choosing your combination boiler, ensure that it comes with a long warranty period. This way, you can rest assured that your boiler will last a long time.</p>\n","innerContent":["\n<p>Manufacturers provide different warranties for different combi boilers in their range. Terms and conditions may also vary. When choosing your combination boiler, ensure that it comes with a long warranty period. This way, you can rest assured that your boiler will last a long time.</p>\n"]},{"blockName":"core/list","attrs":[],"innerBlocks":[{"blockName":"core/list-item","attrs":[],"innerBlocks":[],"innerHTML":"\n<li><strong>Price</strong></li>\n","innerContent":["\n<li><strong>Price</strong></li>\n"]}],"innerHTML":"\n<ul class=\"wp-block-list\"></ul>\n","innerContent":["\n<ul class=\"wp-block-list\">",null,"</ul>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p>Last but not least, the price. The total cost of a new combi boiler consists of the boiler unit and installation costs. Special accessories (e.g. smart thermostats, magnetic filters) may also add to the final price. We will talk more about combi boilers' costs in the next section.</p>\n","innerContent":["\n<p>Last but not least, the price. The total cost of a new combi boiler consists of the boiler unit and installation costs. Special accessories (e.g. smart thermostats, magnetic filters) may also add to the final price. We will talk more about combi boilers' costs in the next section.</p>\n"]}],"innerHTML":"\n<div class=\"wp-block-group\">\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n</div>\n","innerContent":["\n<div class=\"wp-block-group\">",null,"\n\n",null,"\n\n",null,"\n\n",null,"\n\n",null,"\n\n",null,"\n\n",null,"\n\n",null,"\n\n",null,"\n\n",null,"\n\n",null,"\n\n",null,"\n\n",null,"\n\n",null,"\n\n",null,"\n\n",null,"\n\n",null,"\n\n",null,"\n\n",null,"\n\n",null,"\n\n",null,"\n\n",null,"\n\n",null,"\n\n",null,"\n\n",null,"</div>\n"]},{"blockName":null,"attrs":[],"innerBlocks":[],"innerHTML":"\n\n","innerContent":["\n\n"]},{"blockName":"core/group","attrs":[],"innerBlocks":[{"blockName":"core/heading","attrs":[],"innerBlocks":[],"innerHTML":"\n<h2 class=\"wp-block-heading\" id=\"Cost-of-a-Combination-Boiler\">Cost of a combination boiler</h2>\n","innerContent":["\n<h2 class=\"wp-block-heading\" id=\"Cost-of-a-Combination-Boiler\">Cost of a combination boiler</h2>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p>New <a href=\"https://www.greenmatch.co.uk/blog/2018/08/new-boiler-cost\">combi boiler prices</a> in the UK range from <strong>£500 to £3,000</strong>. Among the factors determining the price, we can list:</p>\n","innerContent":["\n<p>New <a href=\"https://www.greenmatch.co.uk/blog/2018/08/new-boiler-cost\">combi boiler prices</a> in the UK range from <strong>£500 to £3,000</strong>. Among the factors determining the price, we can list:</p>\n"]},{"blockName":"core/list","attrs":[],"innerBlocks":[{"blockName":"core/list-item","attrs":[],"innerBlocks":[],"innerHTML":"\n<li><strong>The boiler manufacturer you choose</strong></li>\n","innerContent":["\n<li><strong>The boiler manufacturer you choose</strong></li>\n"]},{"blockName":"core/list-item","attrs":[],"innerBlocks":[],"innerHTML":"\n<li><strong>The model you want</strong> (budget, mid-range, premium)</li>\n","innerContent":["\n<li><strong>The model you want</strong> (budget, mid-range, premium)</li>\n"]},{"blockName":"core/list-item","attrs":[],"innerBlocks":[],"innerHTML":"\n<li><strong>The type of fuel</strong></li>\n","innerContent":["\n<li><strong>The type of fuel</strong></li>\n"]},{"blockName":"core/list-item","attrs":[],"innerBlocks":[],"innerHTML":"\n<li><strong>The combi boiler output rating</strong> (the higher, the more expensive)</li>\n","innerContent":["\n<li><strong>The combi boiler output rating</strong> (the higher, the more expensive)</li>\n"]}],"innerHTML":"\n<ul class=\"wp-block-list\">\n\n\n\n\n\n</ul>\n","innerContent":["\n<ul class=\"wp-block-list\">",null,"\n\n",null,"\n\n",null,"\n\n",null,"</ul>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p>You usually pay a higher price for increased performance and for a prolonged warranty period as well.</p>\n","innerContent":["\n<p>You usually pay a higher price for increased performance and for a prolonged warranty period as well.</p>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p>In addition, you have to consider installation costs. On average, boiler installation costs in the UK range from <strong>£1,600 to £3,500</strong>. The two main factors affecting the cost are:</p>\n","innerContent":["\n<p>In addition, you have to consider installation costs. On average, boiler installation costs in the UK range from <strong>£1,600 to £3,500</strong>. The two main factors affecting the cost are:</p>\n"]},{"blockName":"core/list","attrs":[],"innerBlocks":[{"blockName":"core/list-item","attrs":[],"innerBlocks":[],"innerHTML":"\n<li><strong>Varying labour costs in different areas</strong> (usually higher in large cities)</li>\n","innerContent":["\n<li><strong>Varying labour costs in different areas</strong> (usually higher in large cities)</li>\n"]},{"blockName":"core/list-item","attrs":[],"innerBlocks":[],"innerHTML":"\n<li><strong>The specific combi boiler replacement situation</strong></li>\n","innerContent":["\n<li><strong>The specific combi boiler replacement situation</strong></li>\n"]}],"innerHTML":"\n<ul class=\"wp-block-list\">\n\n</ul>\n","innerContent":["\n<ul class=\"wp-block-list\">",null,"\n\n",null,"</ul>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p>Regarding the latter, replacing an old combination boiler with a new one is less expensive than replacing a regular or a system boiler with a combi. It is because cylinders and feed tanks need to be removed and the pipework adjusted in the last two cases. Installing a new combi in a space that is difficult to access may also add an extra amount to the bill.</p>\n","innerContent":["\n<p>Regarding the latter, replacing an old combination boiler with a new one is less expensive than replacing a regular or a system boiler with a combi. It is because cylinders and feed tanks need to be removed and the pipework adjusted in the last two cases. Installing a new combi in a space that is difficult to access may also add an extra amount to the bill.</p>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p>Probably the best way to keep installation costs as low as possible is to find and compare quotes from different heating engineers in your local area. This allows you to choose the one that best meets your requirements and budget and, therefore, lock in the best deal for you.</p>\n","innerContent":["\n<p>Probably the best way to keep installation costs as low as possible is to find and compare quotes from different heating engineers in your local area. This allows you to choose the one that best meets your requirements and budget and, therefore, lock in the best deal for you.</p>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p>The only downside is that researching and sorting options among dozens of suppliers could take you several hours. Not to mention the time you must spend verifying their credentials and checking customer reviews.</p>\n","innerContent":["\n<p>The only downside is that researching and sorting options among dozens of suppliers could take you several hours. Not to mention the time you must spend verifying their credentials and checking customer reviews.</p>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p><em>However, this is something we are ready to help you with. At GreenMatch, we work with a network of accredited heating engineers across the UK. Fill out the form, and we will send you up to 3 free quotes from our partner installers. You are not obliged to accept any quote you receive.</em></p>\n","innerContent":["\n<p><em>However, this is something we are ready to help you with. At GreenMatch, we work with a network of accredited heating engineers across the UK. Fill out the form, and we will send you up to 3 free quotes from our partner installers. You are not obliged to accept any quote you receive.</em></p>\n"]},{"blockName":"acf/macro-cta-block","attrs":{"name":"acf/macro-cta-block","data":{"cta-block":67362,"_cta-block":"field_macro_cta_block_cta_block"},"mode":"preview","bindData":{"ctaPageFields":{"cta_block_title":"Get your best deal","cta_block_sub_title":"Quickly compare 3 FREE quotes","cta_block_usps":"<ul class=\"ul1\">\n<li class=\"li1\">Quotes from local engineers</li>\n<li class=\"li1\">Payment by finance available</li>\n<li class=\"li1\">Save up to £975</li>\n</ul>\n","cta_block_usps_image":{"ID":67205,"id":67205,"title":"person","filename":"person.png","filesize":53348,"url":"https://cdn.greenmatch.co.uk/cdn-cgi/image/format=auto/2/2023/03/person.png","link":"https://www.greenmatch.co.uk/cta-block/solar/person","alt":"","author":"1","description":"","caption":"","name":"person","status":"inherit","uploaded_to":67204,"date":"2023-03-24 15:51:17","modified":"2023-03-24 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QUOTES NOW","cta_block_button_description":"It only takes 30 seconds","cta_block_optimize_text":"Optimise your home and save the planet","cta_block_optimize_image":{"ID":67392,"id":67392,"title":"earth-globe-square","filename":"earth-globe-square.svg","filesize":8466,"url":"https://cdn.greenmatch.co.uk/cdn-cgi/image/format=auto/2/2023/03/earth-globe-square.svg","link":"https://www.greenmatch.co.uk/cta-block/boilers/earth-globe-square","alt":"Earth globe icon","author":"48","description":"","caption":"","name":"earth-globe-square","status":"inherit","uploaded_to":67362,"date":"2023-03-31 08:31:49","modified":"2023-03-31 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data-v-2d5d288a><div class="header-quote" data-v-2d5d288a><div class="header-quote__title-container" data-v-2d5d288a><div class="header-quote__title" data-v-2d5d288a>Curious About How Much You Can Save on Bills With Combi Boilers?</div></div><div class="header-quote__inner" data-v-2d5d288a><div class="header-quote__quote-container" data-v-2d5d288a><div class="cro-form" data-v-2d5d288a data-v-37cfe7b1><div class="cro-form__header" data-v-37cfe7b1><h3 class="cro-form__header-cta" data-v-37cfe7b1> Answer these simple questions and we will find you the BEST prices </h3></div><p class="cro-form__question" data-v-37cfe7b1> Which type of solar quotes do you need? </p><div class="cro-form__answers" data-v-37cfe7b1><a class="cro-form__button" data-v-37cfe7b1><span class="cro-form__button-text" data-v-37cfe7b1>SOLAR PANELS + BATTERY</span></a><a class="cro-form__button" data-v-37cfe7b1><span class="cro-form__button-text" data-v-37cfe7b1>SOLAR PANELS</span></a><a class="cro-form__button" data-v-37cfe7b1><span class="cro-form__button-text" data-v-37cfe7b1>SOLAR BATTERY</span></a></div><div class="cro-form__progress" data-v-37cfe7b1><div class="cro-form__progress-item" data-v-37cfe7b1><span data-v-37cfe7b1>1</span></div><div class="cro-form__progress-item cro-form__progress-item--blank" data-v-37cfe7b1><span data-v-37cfe7b1>2</span></div><div class="cro-form__progress-item cro-form__progress-item--blank" data-v-37cfe7b1><span data-v-37cfe7b1>3</span></div><div class="cro-form__progress-item cro-form__progress-item--blank" data-v-37cfe7b1><span data-v-37cfe7b1>4</span></div><div class="cro-form__progress-item cro-form__progress-item--blank" data-v-37cfe7b1><span data-v-37cfe7b1>5</span></div></div><div class="cro-form__footer" data-v-37cfe7b1><p class="cro-form__footer-text" data-v-37cfe7b1> It only takes 30 seconds<br data-v-37cfe7b1> 100% free with no obligation </p></div></div><div class="form" data-v-2d5d288a><div class="form-header"><span class="form-header__title">Answer these simple questions and we will find you the BEST prices.</span></div><form class="form-generator"><div class="form-step"><div class="form-row form-row--radio_sliding"><div class="form-row__information--full-width form-row__information"><label for="ChooseProduct" class="form-row__label">What type of fuel do you require for your new boiler?</label></div><div class="radio-sliding" style="--column-count-mobile:1;--column-count-desktop:2;"><div class="radio-sliding__item"><label for="ChooseProduct_0" class="radio-sliding__item-label"><span class="radio-sliding__item-inner"><input id="ChooseProduct_0" name="ChooseProduct" class="radio-sliding__item-input" type="radio" value="10" data-redirect="https://www.greenmatch.co.uk/boiler-quotes"><span class="radio-sliding__item-label-text">Gas</span></span></label><div class="radio-sliding__tooltip"></div></div><div class="radio-sliding__item"><label for="ChooseProduct_1" class="radio-sliding__item-label"><span class="radio-sliding__item-inner"><input id="ChooseProduct_1" name="ChooseProduct" class="radio-sliding__item-input" type="radio" value="23" data-redirect="https://www.greenmatch.co.uk/boiler-quotes"><span class="radio-sliding__item-label-text">Oil</span></span></label><div class="radio-sliding__tooltip"></div></div><div class="radio-sliding__item"><label for="ChooseProduct_2" class="radio-sliding__item-label"><span class="radio-sliding__item-inner"><input id="ChooseProduct_2" name="ChooseProduct" class="radio-sliding__item-input" type="radio" value="19" data-redirect="https://www.greenmatch.co.uk/boiler-quotes"><span class="radio-sliding__item-label-text">LPG</span></span></label><div class="radio-sliding__tooltip"><div class="inline-block form-row__popper" style="border:12px solid transparent;margin:-12px;" data-v-5784ed69><div data-v-5784ed69><div class="form-row__popper-icon" data-v-5784ed69-s><p class="form-row__popper-icon-questionmark" data-v-5784ed69-s> ? </p></div></div><div class="popper" style="display:none;" data-v-5784ed69 data-v-5784ed69><div class="form-row__popper-label" data-v-5784ed69-s>LPG boilers are fuelled by liquid petroleum gas that is stored separately in an external tank. You are likely to not be connected to mains gas.</div></div></div></div></div><div class="radio-sliding__item"><label for="ChooseProduct_3" class="radio-sliding__item-label"><span class="radio-sliding__item-inner"><input id="ChooseProduct_3" name="ChooseProduct" class="radio-sliding__item-input" type="radio" value="15" data-redirect="https://www.greenmatch.co.uk/boiler-quotes"><span class="radio-sliding__item-label-text">Electric</span></span></label><div class="radio-sliding__tooltip"></div></div><div class="radio-sliding__item"><label for="ChooseProduct_4" class="radio-sliding__item-label"><span class="radio-sliding__item-inner"><input id="ChooseProduct_4" name="ChooseProduct" class="radio-sliding__item-input" type="radio" value="4" data-redirect="https://www.greenmatch.co.uk/boiler-quotes"><span class="radio-sliding__item-label-text">Biomass</span></span></label><div class="radio-sliding__tooltip"></div></div></div></div></div></form><section class="form-submit" data-v-69094e9e><button class="form-submit__button" data-v-69094e9e><span data-v-69094e9e>Next step</span></button></section><div class="form-footer" data-v-2487a3a4><div class="form-footer__clock" data-v-2487a3a4>It only takes 30 seconds 100% free and with no obligation <div class="form-footer__back-button-wrapper" data-v-2487a3a4></div></div></div><div class="form-progress" style="--47d2ea1a:9;--60ad637c:1;" data-v-c90bc753><div class="form-progress__inner" data-v-c90bc753></div></div></div></div><div class="header-quote__sidebar-container" data-v-2d5d288a><div class="header-quote__selling-points-container" data-v-2d5d288a><div class="header-quote__selling-point" data-v-2d5d288a><div class="header-quote__icon-container" data-v-2d5d288a><img class="header-quote__usps-icon" src="https://cdn.greenmatch.co.uk/cdn-cgi/image/format=auto/2/2022/10/checkmark.svg" alt="Save hours of research time" loading="lazy" data-v-2d5d288a></div><div class="header-quote__usps-text" data-v-2d5d288a><span class="header-quote__usps-popper" data-v-2d5d288a><div class="inline-block" style="border: 12px solid transparent; margin: -12px;" data-v-5784ed69 data-v-2d5d288a><div data-v-5784ed69><button class="header-quote__popper-button" data-v-2d5d288a data-v-5784ed69-s>Save hours of research time</button></div><div class="popper" style="display:none;" data-v-5784ed69 data-v-5784ed69><div class="header-quote__popper-content" data-v-2d5d288a data-v-5784ed69-s>Get up to 3 quotes by filling in only 1 quick form</div><div id="arrow" data-popper-arrow data-v-20b7fd4a data-v-5784ed69></div></div></div></span><span class="header-quote__usps-headline" data-v-2d5d288a>Save hours of research time</span><p class="header-quote__usps-subtitle" data-v-2d5d288a>Get up to 3 quotes by filling in only 1 quick form</p></div></div><div class="header-quote__selling-point" data-v-2d5d288a><div class="header-quote__icon-container" data-v-2d5d288a><img class="header-quote__usps-icon" src="https://cdn.greenmatch.co.uk/cdn-cgi/image/format=auto/2/2022/10/checkmark.svg" alt="Save up to £975" loading="lazy" data-v-2d5d288a></div><div class="header-quote__usps-text" data-v-2d5d288a><span class="header-quote__usps-popper" data-v-2d5d288a><div class="inline-block" style="border: 12px solid transparent; margin: -12px;" data-v-5784ed69 data-v-2d5d288a><div data-v-5784ed69><button class="header-quote__popper-button" data-v-2d5d288a data-v-5784ed69-s>Save up to £975</button></div><div class="popper" style="display:none;" data-v-5784ed69 data-v-5784ed69><div class="header-quote__popper-content" data-v-2d5d288a data-v-5784ed69-s>Slash your energy bills by installing an energy efficient boiler</div><div id="arrow" data-popper-arrow data-v-20b7fd4a data-v-5784ed69></div></div></div></span><span class="header-quote__usps-headline" data-v-2d5d288a>Save up to £975</span><p class="header-quote__usps-subtitle" data-v-2d5d288a>Slash your energy bills by installing an energy efficient boiler</p></div></div><div class="header-quote__selling-point" data-v-2d5d288a><div class="header-quote__icon-container" data-v-2d5d288a><img class="header-quote__usps-icon" src="https://cdn.greenmatch.co.uk/cdn-cgi/image/format=auto/2/2022/10/checkmark.svg" alt="Save the planet" loading="lazy" data-v-2d5d288a></div><div class="header-quote__usps-text" data-v-2d5d288a><span class="header-quote__usps-popper" data-v-2d5d288a><div class="inline-block" style="border: 12px solid transparent; margin: -12px;" data-v-5784ed69 data-v-2d5d288a><div data-v-5784ed69><button class="header-quote__popper-button" data-v-2d5d288a data-v-5784ed69-s>Save the planet</button></div><div class="popper" style="display:none;" data-v-5784ed69 data-v-5784ed69><div class="header-quote__popper-content" data-v-2d5d288a data-v-5784ed69-s>We’ve helped over 500,000 homeowners reduce their carbon footprint</div><div id="arrow" data-popper-arrow data-v-20b7fd4a data-v-5784ed69></div></div></div></span><span class="header-quote__usps-headline" data-v-2d5d288a>Save the planet</span><p class="header-quote__usps-subtitle" data-v-2d5d288a>We’ve helped over 500,000 homeowners reduce their carbon footprint</p></div></div></div><div class="media-container" data-v-2d5d288a data-v-cebc749a><div class="media container" data-v-cebc749a><div class="media__inner--background media__inner" data-v-cebc749a><div class="media__list" data-v-cebc749a><div class="media__list-title" data-v-cebc749a>Mentioned in</div><img src="https://cdn.greenmatch.co.uk/cdn-cgi/image/format=auto/2/2023/04/guardian.png" alt="The Guardian logo" class="media__list-item" loading="lazy" width="99" height="40" data-v-cebc749a><img src="https://cdn.greenmatch.co.uk/cdn-cgi/image/format=auto/2/2023/04/harvard.png" alt="Harvard University logo" class="media__list-item" loading="lazy" width="116" height="40" data-v-cebc749a><img src="https://cdn.greenmatch.co.uk/cdn-cgi/image/format=auto/2/2023/04/independent.png" alt="Independent logo" class="media__list-item" loading="lazy" width="190" height="40" data-v-cebc749a><img src="https://cdn.greenmatch.co.uk/cdn-cgi/image/format=auto/2/2023/04/space.png" alt="SPACE.com logo" class="media__list-item" loading="lazy" width="96" height="40" data-v-cebc749a><img src="https://cdn.greenmatch.co.uk/cdn-cgi/image/format=auto/2/2023/04/forbes.png" alt="Forbes logo" class="media__list-item" loading="lazy" width="90" height="40" data-v-cebc749a></div></div></div></div></div></div></div></section></header><section class="content-and-sidebar container content"><div class="content-header-container" data-v-3c81030a><section class="content-header wp-block-group" data-v-3c81030a><div class="content-header__breadcrumbs" data-v-3c81030a><ul class="content-header__breadcrumbs-wrapper" data-v-3c81030a><li class="content-header__breadcrumbs-partial" data-v-3c81030a><a class="content-header__breadcrumbs-link" href="https://www.greenmatch.co.uk/" data-v-3c81030a>GreenMatch</a></li><li class="content-header__breadcrumbs-partial" data-v-3c81030a><a class="content-header__breadcrumbs-link" href="https://www.greenmatch.co.uk/boilers" data-v-3c81030a>Boilers</a></li><li class="content-header__breadcrumbs-partial" data-v-3c81030a><span class="content-header__breadcrumbs-text" data-v-3c81030a>Combi Boilers</span></li></ul></div><div class="content-header__info" data-v-3c81030a><div class="content-header__text" data-headlessui-state><div class="content-header__text-button" id="headlessui-popover-button-v-0-86" aria-expanded="false" data-headlessui-state> Text size </div></div><div hidden style="position:fixed;top:1;left:1;width:1;height:0;padding:0;margin:-1;overflow:hidden;clip:rect(0, 0, 0, 0);white-space:nowrap;border-width:0;display:none;"></div><div class="content-header__last-updated" data-v-3c81030a>Last updated: 28 November 2024</div></div></section></div><div class="flex flex-col md:flex-row mb-8"><div class="md:w-2/3 md:mr-4 mb-8 space-y-4"><div class="w-full"><div class="body-content"><div class="wordpress-group" style="" data-v-30804b50><div class="wordpress-heading u-heading-1 wordpress-heading--h1" style="--c37e9152:left;" data-v-beed8f72> <h1 class="wp-block-heading" id="what-is-a-combi">What is a Combi Boiler? A Full Explanation & Details</h1> </div><section class="author-byline-container" data-v-bcf82446><div class="author-byline" data-v-bcf82446><div class="author-byline__inner" data-v-bcf82446><div class="author-byline__item" data-v-bcf82446><img src="https://cdn.greenmatch.co.uk/cdn-cgi/image/format=auto/2/2022/10/tony.jpeg" alt="Luis Antonio Gómez Pérez" class="author-byline__item-image" data-v-bcf82446><div class="author-byline__item-content" data-v-bcf82446><div class="author-byline__item-title" data-v-bcf82446><span data-v-bcf82446>Written by</span></div><span data-v-bcf82446>Luis Antonio Gómez Pérez</span></div></div><div class="author-byline__item" data-v-bcf82446><div class="author-byline__item-content" data-v-bcf82446><div class="author-byline__item-title" data-v-bcf82446><svg class="author-byline__item-title-icon" xmlns="http://www.w3.org/2000/svg" viewBox="0 -960 960 960" data-v-bcf82446><path d="M200-80q-33 0-56.5-23.5T120-160v-560q0-33 23.5-56.5T200-800h40v-80h80v80h320v-80h80v80h40q33 0 56.5 23.5T840-720v560q0 33-23.5 56.5T760-80H200Zm0-80h560v-400H200v400Zm0-480h560v-80H200v80Zm0 0v-80 80Zm280 240q-17 0-28.5-11.5T440-440q0-17 11.5-28.5T480-480q17 0 28.5 11.5T520-440q0 17-11.5 28.5T480-400Zm-160 0q-17 0-28.5-11.5T280-440q0-17 11.5-28.5T320-480q17 0 28.5 11.5T360-440q0 17-11.5 28.5T320-400Zm320 0q-17 0-28.5-11.5T600-440q0-17 11.5-28.5T640-480q17 0 28.5 11.5T680-440q0 17-11.5 28.5T640-400ZM480-240q-17 0-28.5-11.5T440-280q0-17 11.5-28.5T480-320q17 0 28.5 11.5T520-280q0 17-11.5 28.5T480-240Zm-160 0q-17 0-28.5-11.5T280-280q0-17 11.5-28.5T320-320q17 0 28.5 11.5T360-280q0 17-11.5 28.5T320-240Zm320 0q-17 0-28.5-11.5T600-280q0-17 11.5-28.5T640-320q17 0 28.5 11.5T680-280q0 17-11.5 28.5T640-240Z" data-v-bcf82446></path></svg><span data-v-bcf82446>Last updated</span></div><span data-v-bcf82446>28 November 2024</span></div></div></div></div></section></div><div class="wordpress-group" style="" data-v-30804b50><div class="wordpress-image"> <figure class="wp-block-image aligncenter no-shadow"><img src="https://cdn.greenmatch.co.uk/cdn-cgi/image/format=auto/2/2022/10/collage-456.jpg" alt="What is a combi boiler" class="wp-image-60348" /></figure> </div><div class="wordpress-heading u-heading-2 wordpress-heading--h2" style="--c37e9152:left;" data-v-beed8f72> <h2 class="wp-block-heading" id="What-is-a-Combi-Boiler">What is a combi boiler?</h2> </div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p>A combination or combi boiler is a compact boiler unit that can heat both your hot water and your central heating. It does not require additional components such as hot water storage cylinders to work, making it a space-saving and, therefore, a popular choice among homeowners in the UK. In fact, it is the most commonly installed <a href="https://www.greenmatch.co.uk/blog/2019/06/best-boiler-to-buy#boiler-type" data-anchor="#boiler-type">type of boiler</a> in the country.</p> </div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p>Combi boilers are easy to install and also to hide away in a kitchen cupboard or boiler cabinet. These features enable you to merge a combi boiler with your home’s style. On top of that, they are also very convenient. Combi boilers provide a fast supply of instant hot water since they take water directly from the mains and heat it as required. In this article, we will take a closer look at combi boilers, their specific types, how they work, their pros, cons, and costs.</p> </div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p><em>Are you interested in a combi boiler? GreenMatch can help you find the one that best meets your needs. We will save you hours of research time and effort thanks to our team of heating experts and our nationwide network of partner installers. Ask for quotes now, and we will send you <strong>up to 3 tailor-made quotes</strong> for free. 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get you the best deal</div></div><div class="cta-block__bottom-phonenumber" style="color: rgb(var(--base-400))" data-v-94877ae5><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="currentColor" data-v-94877ae5><path fill-rule="evenodd" d="M1.5 4.5a3 3 0 013-3h1.372c.86 0 1.61.586 1.819 1.42l1.105 4.423a1.875 1.875 0 01-.694 1.955l-1.293.97c-.135.101-.164.249-.126.352a11.285 11.285 0 006.697 6.697c.103.038.25.009.352-.126l.97-1.293a1.875 1.875 0 011.955-.694l4.423 1.105c.834.209 1.42.959 1.42 1.82V19.5a3 3 0 01-3 3h-2.25C8.552 22.5 1.5 15.448 1.5 6.75V4.5z" clip-rule="evenodd" data-v-94877ae5></path></svg><a href="tel:+443308080405" data-v-94877ae5>0330 808 0405</a></div></div></div></div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p></p> </div></div><div class="wordpress-group" style="" data-v-30804b50><div class="table-of-contents table-of-contents--background" style=""><div class="table-of-contents__heading">Learn More in Our Guide</div><ul class="table-of-contents__list"><li class="table-of-contents__item"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 20 20" fill="currentColor" class="table-of-contents__icon"><path fill-rule="evenodd" d="M5.293 7.293a1 1 0 011.414 0L10 10.586l3.293-3.293a1 1 0 111.414 1.414l-4 4a1 1 0 01-1.414 0l-4-4a1 1 0 010-1.414z" clip-rule="evenodd"></path></svg><a href="#What-Type-of-Heating-is-a-Combi-Boiler" class="table-of-contents__link">What type of heating is a combi boiler</a></li><li class="table-of-contents__item"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 20 20" fill="currentColor" class="table-of-contents__icon"><path fill-rule="evenodd" d="M5.293 7.293a1 1 0 011.414 0L10 10.586l3.293-3.293a1 1 0 111.414 1.414l-4 4a1 1 0 01-1.414 0l-4-4a1 1 0 010-1.414z" clip-rule="evenodd"></path></svg><a href="#How-Does-a-Combination-Boiler-Work" class="table-of-contents__link">How does a combination boiler work</a></li><li class="table-of-contents__item"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 20 20" fill="currentColor" class="table-of-contents__icon"><path fill-rule="evenodd" d="M5.293 7.293a1 1 0 011.414 0L10 10.586l3.293-3.293a1 1 0 111.414 1.414l-4 4a1 1 0 01-1.414 0l-4-4a1 1 0 010-1.414z" clip-rule="evenodd"></path></svg><a href="#Advantages-of-a-Combi-Boiler" class="table-of-contents__link">Advantages of a combi boiler</a></li><li class="table-of-contents__item"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 20 20" fill="currentColor" class="table-of-contents__icon"><path fill-rule="evenodd" d="M5.293 7.293a1 1 0 011.414 0L10 10.586l3.293-3.293a1 1 0 111.414 1.414l-4 4a1 1 0 01-1.414 0l-4-4a1 1 0 010-1.414z" clip-rule="evenodd"></path></svg><a href="#Disadvantages-of-a-Combi-Boiler" class="table-of-contents__link">Disadvantages of a combi boiler</a></li><li class="table-of-contents__item"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 20 20" fill="currentColor" class="table-of-contents__icon"><path fill-rule="evenodd" d="M5.293 7.293a1 1 0 011.414 0L10 10.586l3.293-3.293a1 1 0 111.414 1.414l-4 4a1 1 0 01-1.414 0l-4-4a1 1 0 010-1.414z" clip-rule="evenodd"></path></svg><a href="#What-Should-You-Consider-When-Choosing-a-Combi-Boiler" class="table-of-contents__link">What should you consider when choosing a combi boiler</a></li><li class="table-of-contents__item"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 20 20" fill="currentColor" class="table-of-contents__icon"><path fill-rule="evenodd" d="M5.293 7.293a1 1 0 011.414 0L10 10.586l3.293-3.293a1 1 0 111.414 1.414l-4 4a1 1 0 01-1.414 0l-4-4a1 1 0 010-1.414z" clip-rule="evenodd"></path></svg><a href="#Cost-of-a-Combination-Boiler" class="table-of-contents__link">Cost of a combination boiler</a></li><li class="table-of-contents__item"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 20 20" fill="currentColor" class="table-of-contents__icon"><path fill-rule="evenodd" d="M5.293 7.293a1 1 0 011.414 0L10 10.586l3.293-3.293a1 1 0 111.414 1.414l-4 4a1 1 0 01-1.414 0l-4-4a1 1 0 010-1.414z" clip-rule="evenodd"></path></svg><a href="#FAQ" class="table-of-contents__link">FAQ</a></li></ul></div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p></p> </div></div><div class="wordpress-group" style="" data-v-30804b50><div class="wordpress-heading u-heading-2 wordpress-heading--h2" style="--c37e9152:left;" data-v-beed8f72> <h2 class="wp-block-heading" id="What-Type-of-Heating-is-a-Combi-Boiler">What type of heating is a combi boiler?</h2> </div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p>Combi boilers are simple units. Usually, they are designed for wall-mounted installation. The most significant difference between their different types is the fuel they use. Currently, there are 4 main types of fuels for combi boilers: gas, oil, LPG (Liquified Petroleum Gas), and electricity.</p> </div><div class="wordpress-heading u-heading-3 wordpress-heading--h3" style="--c37e9152:left;" data-v-beed8f72> <h3 class="wp-block-heading">Gas combination boilers</h3> </div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p>Gas combi boilers are the most common combi boilers in the UK. They run on natural gas sent to homes via the national gas grid. Even though natural gas is produced from fossil fuels, it is considered cleaner than oil and coal.</p> </div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p>Although they release CO2 into the atmosphere when running, all modern combi models have inbuilt <a href="https://www.greenmatch.co.uk/boilers/condensing/efficiency" title="How Efficient is a Condensing Boiler?">condensing technology</a> that makes them highly efficient heating units. This technology ensures that the heat usually lost out of the flue pipe is recycled back into the system.</p> </div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p>As a result, you can minimise energy consumption and, therefore, help the environment while keeping your heating bills low.</p> </div><div class="wordpress-heading u-heading-3 wordpress-heading--h3" style="--c37e9152:left;" data-v-beed8f72> <h3 class="wp-block-heading">Oil combi boiler</h3> </div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p><a href="https://www.greenmatch.co.uk/boilers/combi-boilers/oil-fired-combi-boilers">Oil combi boilers</a> are a cost-effective alternative for houses disconnected from the grid. However, they are not as space-saving as other combi boilers since you will need to store the fuel in an external tank. You must also order refills periodically to ensure you don’t run out of fuel.</p> </div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p>Modern oil combi boilers also have inbuilt condensing technology. Nevertheless, this fuel’s emissions intensity (measured in kilograms of CO2 equivalent per kWh) is higher than that of gas.</p> </div><div class="wordpress-heading u-heading-3 wordpress-heading--h3" style="--c37e9152:left;" data-v-beed8f72> <h3 class="wp-block-heading">LPG combi boilers</h3> </div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p>These boilers run on Liquefied Petroleum Gas, which is a combined product of natural gas and oil extractions. They are also a suitable option for properties disconnected from the grid, with the advantage of being cheaper and slightly cleaner than oil. Many manufacturers already offer gas boilers that are compatible with LPG.</p> </div><div class="wordpress-heading u-heading-3 wordpress-heading--h3" style="--c37e9152:left;" data-v-beed8f72> <h3 class="wp-block-heading">Electric combi boilers</h3> </div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p><a href="https://www.greenmatch.co.uk/boilers/electric/combi" title="Electric Combi Boilers">Electric combi boilers</a> boast efficiency ratings of 99-100%, making them the most energy-efficient boiler type available. They don’t waste energy or release CO2 when working. However, they can only achieve a zero-emissions performance as long as the electricity powering them comes from renewable sources.</p> </div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p>In this regard, you could combine them with <a href="https://www.greenmatch.co.uk/solar-energy/solar-panels" title="Solar Panels">solar panels</a> or check whether your energy supplier favours the use of renewable sources in the energy mix.</p> </div><div class="wordpress-heading u-heading-3 wordpress-heading--h3" style="--c37e9152:left;" data-v-beed8f72> <h3 class="wp-block-heading">Environmental impact of combi boilers</h3> </div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p>Although it varies greatly from case to case, we can get an overview of the environmental impact of combi boilers, depending on what fuel they use.</p> </div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p>For instance, looking at the data from the Energy Saving Trust comparing gas, oil, LPG, and electricity across the UK, we can draw some conclusions based on each fuel’s emission intensity.</p> </div><div class="wordpress-html"> <div class="table-responsive"><table border="0"><tbody><tr><th colspan="3">Emission Intensity by Fuel (kilograms of CO2 equivalent per kWh)</th></tr><tr><td> </td><td><p><strong>England, Scotland and Wales</strong></p></td><td><p><strong>Northern Ireland</strong></p></td></tr><tr><td><p>Gas</p></td><td><p>0.213</p></td><td><p>0.213</p></td></tr><tr><td><p>Oil</p></td><td><p>0.298</p></td><td><p>0.298</p></td></tr><tr><td><p>LPG</p></td><td><p>0.240</p></td><td><p>0.240</p></td></tr><tr><td><p>Electricity</p></td><td><p>0.225</p></td><td><p>0.234</p></td></tr></tbody></table></div> </div><div class="wordpress-html"> <p style="text-align: center" class="fine-print"><strong>Source:</strong> Energy Saving Trust (July 2023)</p> </div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p>It is worth mentioning that data for electricity in the table above refers to the regions’ averages and assumes that it is electricity distributed through the national grid. This is why electricity’s emission intensity appears higher than that of natural gas, as the UK’s electricity generation relies mostly on fossil fuels at the moment.</p> </div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p>If you manage to power your electric combi boiler with renewable sources (e.g. <a href="https://www.greenmatch.co.uk/solar-energy" title="Solar Energy">solar energy</a>), then its negative environmental impact will be minimal.</p> </div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p>At GreenMatch, we are committed to helping you navigate the transition to more sustainable ways of heating your home. In this case, we recommend switching to <a href="https://www.greenmatch.co.uk/blog/low-carbon-heating" title="Low Carbon Heating">low-carbon systems</a> such as solar panels, <a href="https://www.greenmatch.co.uk/heat-pumps" title="Heat Pump">heat pumps</a>, or <a href="https://www.greenmatch.co.uk/boilers/biomass/domestic" title="Domestic">domestic biomass boilers</a>. However, despite becoming more affordable over time, these are still rather expensive alternatives.</p> </div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p><em>If you are not ready yet to switch because of either technical or financing reasons, consider installing a highly-efficient electric or gas combi boiler. Our experts at GreenMatch can send you up to 3 free offers for these energy-efficient solutions tailored to your home's energy requirements from suppliers that operate near you.</em></p> </div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p><em>We advise you then compare these offers objectively to lock in the best deal. For instance, in a gas-heated home in England, Scotland or Wales, you could save up to £630 per year on your energy bills by installing a highly-efficient condensing combi boiler. Get started by clicking the button below.</em></p> </div><div class="cta-block" style="background-image:linear-gradient(to right, #deeefa, #deeefa);--1554cd56:#000;--4f2215c8:#c3e0f3;--147220ca:rgb(68 68 68);--7b28d34a:rgb(255, 111, 0);--09347c9a:#ffffff;--3bc782e2:rgb(148, 148, 148);--67e53659:#deeefa;--e9b1b55c:#deeefa;--5c587492:#3daee2;--454f35ba:#535456;--20c6ad50:#000;--10fda644:#c3e0f3;--e8a5e7c6:rgb(68 68 68);--143b308c:rgb(255, 111, 0);--33169ddc:#ffffff;--947f57de:rgb(148, 148, 148);--388c8c7a:#5f6265;--224b6ae2:#fff;--90c71118:rgb(var(--base-400));--4c846620:rgb(var(--base-200));--70bbd5b2:rgb(var(--base-200));" data-v-94877ae5><div class="cta-block__header" data-v-94877ae5><div class="cta-block__title" style="color: #3daee2" data-v-94877ae5>Get your best deal</div><div class="cta-block__sub-title" style="color: #535456" data-v-94877ae5>Quickly compare 3 FREE quotes</div></div><div class="cta-block__content-container" data-v-94877ae5><div class="cta-block__usp-container" data-v-94877ae5><div class="cta-block__usps" data-v-94877ae5><ul class="ul1"> <li class="li1">Quotes from local engineers</li> <li class="li1">Payment by finance available</li> <li class="li1">Save up to £975</li> </ul> </div><div class="cta-button cta-button--background" data-v-94877ae5 style="" data-v-ed61c7a3><div class="buttons-orange" data-v-ed61c7a3><div class="link">GET QUOTES NOW</div></div><p class="cta-button__description--text-color cta-button__description" data-v-ed61c7a3><svg xmlns="http://www.w3.org/2000/svg" class="cta-button__icon" fill="none" viewBox="0 0 24 24" stroke="currentColor" stroke-width="2" data-v-ed61c7a3><path stroke-linecap="round" stroke-linejoin="round" d="M12 8v4l3 3m6-3a9 9 0 11-18 0 9 9 0 0118 0z" data-v-ed61c7a3></path></svg> It only takes 30 seconds</p></div><img src="https://cdn.greenmatch.co.uk/cdn-cgi/image/format=auto/2/2023/03/person.png" alt="" width="124" height="277" loading="lazy" data-v-94877ae5></div><div class="cta-block__optimize-home-container" data-v-94877ae5><div class="cta-block__optimize-image-container" data-v-94877ae5><div class="cta-block__optimize-image" data-v-94877ae5><img src="https://cdn.greenmatch.co.uk/cdn-cgi/image/format=auto/2/2023/03/earth-globe-square.svg" alt="Earth globe icon" loading="lazy" data-v-94877ae5></div></div><div class="cta-block__optimize-text" data-v-94877ae5>Optimise your home and save the planet</div></div><div data-v-94877ae5><img src="https://cdn.greenmatch.co.uk/cdn-cgi/image/format=auto/2/2023/03/earth-globe-square.svg" alt="Earth globe icon" loading="lazy" data-v-94877ae5></div></div><div class="cta-block__bottom" style="background-color: #fff" data-v-94877ae5><div class="cta-block__bottom-container" data-v-94877ae5><div class="cta-block__bottom-title-container" style="color: #5f6265" data-v-94877ae5><div class="cta-block__bottom-title" data-v-94877ae5>Call us to get quotes</div><div class="cta-block__bottom-sub-title" data-v-94877ae5>We will get you the best deal</div></div><div class="cta-block__bottom-phonenumber" style="color: rgb(var(--base-400))" data-v-94877ae5><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="currentColor" data-v-94877ae5><path fill-rule="evenodd" d="M1.5 4.5a3 3 0 013-3h1.372c.86 0 1.61.586 1.819 1.42l1.105 4.423a1.875 1.875 0 01-.694 1.955l-1.293.97c-.135.101-.164.249-.126.352a11.285 11.285 0 006.697 6.697c.103.038.25.009.352-.126l.97-1.293a1.875 1.875 0 011.955-.694l4.423 1.105c.834.209 1.42.959 1.42 1.82V19.5a3 3 0 01-3 3h-2.25C8.552 22.5 1.5 15.448 1.5 6.75V4.5z" clip-rule="evenodd" data-v-94877ae5></path></svg><a href="tel:+443308080405" data-v-94877ae5>0330 808 0405</a></div></div></div></div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p></p> </div></div><div class="wordpress-group" style="" data-v-30804b50><div class="wordpress-heading u-heading-2 wordpress-heading--h2" style="--c37e9152:left;" data-v-beed8f72> <h2 class="wp-block-heading" id="How-Does-a-Combination-Boiler-Work">How does a combination boiler work?</h2> </div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p>Although combi boilers may use different fuels, they all work almost the same way. Every time you turn on a tap or switch on the heating, your combi boiler will fire up and start heating the water that goes through the pipes across your home.</p> </div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p>During this process, the cold water from the mains passes over a highly efficient heat exchanger. The heat exchanger transfers most heat from the burnt gas (90% or more) to the cold water and then distributes it to the taps as needed.</p> </div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p>The hot water travels to a diverter, and then it is sent either to the pipes for your taps or out into the radiators. Once the water has circulated through the radiators, it is sent back around the circuit, reheated, and used again.</p> </div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p>A combination boiler produces a continuous flow of hot water; however, a slight decline in water pressure may occur if you simultaneously use more than one tap or shower. This makes combination boilers more suitable for smaller households with just one bathroom.</p> </div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p>Nevertheless, there are combi boiler models powerful enough to meet the heating and hot water demand of houses with 4-5 bedrooms and 2 or more bathrooms.</p> </div><div class="wordpress-heading u-heading-3 wordpress-heading--h3" style="--c37e9152:left;" data-v-beed8f72> <h3 class="wp-block-heading">How does a combi boiler fit in your central heating system (diagram)?</h3> </div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p>With a combi boiler, you don’t need to install additional components such as a hot water cylinder or a feed water tank. In addition to extra space, this also means that no extra heat will be lost by keeping water hot inside a cylinder.</p> </div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p>As you can see, combination boilers are potentially more energy-saving options than other types of boilers. Below we have included a combi boiler diagram showing how they operate.</p> </div><div class="wordpress-image"> <figure class="wp-block-image aligncenter"><img src="https://cdn.greenmatch.co.uk/cdn-cgi/image/format=auto/2/2022/10/gm-how_a_boiler_works.png" alt="Combi boiler diagram" class="wp-image-60322" /></figure> </div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p> </p> </div></div><div class="wordpress-group" style="" data-v-30804b50><div class="wordpress-heading u-heading-2 wordpress-heading--h2" style="--c37e9152:left;" data-v-beed8f72> <h2 class="wp-block-heading" id="Advantages-of-a-Combi-Boiler">Advantages of a combi boiler</h2> </div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p>Combi boilers are the right solution for many homes because of their advantages. Here we’ve listed a few of them:</p> </div><div class="wordpress-list" style="--59fc38e0:;" data-v-9bc93961><ul class="wordpress-list__wrapper checkmarks-colored" data-v-9bc93961> <li><strong>Highly efficient</strong></li> </ul></div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p>Due to condensing technology, modern combi boilers' efficiency is frequently over 92%. To put it into context, this means that for every £1 you spend on powering your boiler, only 8p is lost in the heating process. Old boilers’ efficiency could be as low as 70-80%, assuming their performance is still acceptable.</p> </div><div class="wordpress-list" style="--59fc38e0:;" data-v-9bc93961><ul class="wordpress-list__wrapper checkmarks-colored" data-v-9bc93961> <li><strong>Money-saving, with lower energy bills</strong></li> </ul></div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p>Look at the example above: 20-30p does not seem like much money but, added up over time, it is a considerable sum wasted. Combi boilers’ high-efficiency rating can help you cut off your energy bills. How much you can save depends on the efficiencies of your old boiler and the new combi you are replacing it with, as well as on your property size and type.</p> </div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p>For instance, replacing a 70% efficient old gas boiler with a highly efficient condensing combi boiler (90%+) in a detached house can save you around £630 per year. We have other in-depth resources that could help you determine <a href="https://www.greenmatch.co.uk/boilers/what-size-boiler-do-i-need" target="_blank" rel="noreferrer noopener">what size boiler you need</a>.</p> </div><div class="wordpress-list" style="--59fc38e0:;" data-v-9bc93961><ul class="wordpress-list__wrapper checkmarks-colored" data-v-9bc93961> <li><strong>Hot water on demand</strong></li> </ul></div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p>With a combi, you get hot water from your taps whenever you need it. This is because combination boilers take their water supply directly from the mains, heat it, and send it to your water outlets right away.</p> </div><div class="wordpress-list" style="--59fc38e0:;" data-v-9bc93961><ul class="wordpress-list__wrapper checkmarks-colored" data-v-9bc93961> <li><strong>Small in size</strong></li> </ul></div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p>Most combi boilers can be installed within a standard kitchen cupboard, thanks to their compact dimensions. Furthermore, they don't need water storage cylinders or feed tanks; thus, they can save space all around your house. It also makes installation quicker, easier, and potentially cheaper.</p> </div></div><div class="wordpress-group" style="" data-v-30804b50><div class="wordpress-heading u-heading-2 wordpress-heading--h2" style="--c37e9152:left;" data-v-beed8f72> <h2 class="wp-block-heading" id="Disadvantages-of-a-Combi-Boiler">Disadvantages of a combi boiler</h2> </div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p>Naturally, combi boilers also have some disadvantages. These are the main two:</p> </div><div class="wordpress-list" style="--59fc38e0:;" data-v-9bc93961><ul class="wordpress-list__wrapper" data-v-9bc93961> <li><strong>Not suitable for large homes with multiple bathrooms</strong></li> </ul></div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p>Most combi boilers aren't powerful enough to meet great demands for hot water in houses with 2 or more bathrooms, especially if they are used at the same time. Despite some combi models being capable of doing so, you might want to consider a <a href="https://www.greenmatch.co.uk/boilers/system">system boiler</a> instead.</p> </div><div class="wordpress-list" style="--59fc38e0:;" data-v-9bc93961><ul class="wordpress-list__wrapper" data-v-9bc93961> <li><strong>Not ideal for homes with weak mains pressure</strong></li> </ul></div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p>Similarly, a combination boiler may struggle to keep a proper flow of water to your taps if your mains pressure is already low. To solve it, you could install an additional pump to strengthen the flow. However, this device comes at an extra cost.</p> </div><div class="wordpress-heading u-heading-2 wordpress-heading--h2" style="--c37e9152:left;" data-v-beed8f72> <h2 class="wp-block-heading" id="What-Should-You-Consider-When-Choosing-a-Combi-Boiler">What should you consider when choosing a combi boiler?</h2> </div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p>When looking for a combi boiler for your home, you should consider its brand, type of fuel, output rating, efficiency, warranty, and price. There might be some other special features you are looking for, but these 6 are essential.</p> </div><div class="wordpress-list" style="--59fc38e0:;" data-v-9bc93961><ul class="wordpress-list__wrapper" data-v-9bc93961> <li><strong>Brand</strong></li> </ul></div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p>Getting a combi boiler from a reputable brand is always a plus. This way, you can rest assured that you have bought a reliable, high-quality boiler. Usually, customer services from top brands are also of a higher quality. You can also look at our section on <a href="https://www.greenmatch.co.uk/boilers/brands" title="Brands">boiler brands</a> to know which is the best combi boiler on the market for you!</p> </div><div class="wordpress-list" style="--59fc38e0:;" data-v-9bc93961><ul class="wordpress-list__wrapper" data-v-9bc93961> <li><strong>Type of fuel</strong></li> </ul></div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p>As we explained above, <a href="#What-Type-of-Heating-is-a-Combi-Boiler">combi boilers can run on different types of fuels</a>. Make sure to select one that fits your needs, as each of them has different advantages.</p> </div><div class="wordpress-list" style="--59fc38e0:;" data-v-9bc93961><ul class="wordpress-list__wrapper" data-v-9bc93961> <li><strong>Output rating</strong></li> </ul></div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p>A combi boiler’s output rating is its power, measured in kilowatts (kW). Combi boilers have two output ratings: one for central heating (CH) and another for domestic hot water (DHW).</p> </div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p>Compared to regular and system boilers, combi boilers need to be more powerful to achieve the same result. Therefore, the <a href="https://www.greenmatch.co.uk/blog/best-boiler-4-bedroom-house">best combi boiler for a 4 bedroom house</a> should have a higher power output than one for smaller homes. The table below shows the approximate combi boiler output ranges meeting the central heating requirements of different houses.</p> </div><div class="wordpress-html"> <div class="table-responsive"><table border="0"><tbody><tr><th colspan="2">Approximate Combi Boiler Output Rating (CH Output)</th></tr><tr><td><p>Houses with up to 10 radiators (up to 4 bedrooms)</p></td><td><p>24-27 kW</p></td></tr><tr><td><p>Houses with 10-15 radiators (4-5 bedrooms)</p></td><td><p>28-34 kW</p></td></tr><tr><td><p>Houses with 15-20 radiators (5+ bedrooms)</p></td><td><p>35-42 kW</p></td></tr></tbody></table></div> </div><div class="wordpress-list" style="--59fc38e0:;" data-v-9bc93961><ul class="wordpress-list__wrapper" data-v-9bc93961> <li><strong>Efficiency</strong></li> </ul></div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p>Boilers receive an energy efficiency rating from A (highest) to G (lowest) on an ABC banding scale known as the ErP rating.</p> </div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p>All modern gas boilers are highly efficient. Most of them are A-rated, but it is also worth checking their efficiency rating out of 100%. The closer they are to 100%, the lower your bills.</p> </div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p>Electric combi boilers, on the other hand, boast 99-100% efficiency ratings. However, many of them have an ErP D-rating. This is because most electricity is generated by burning fossil fuels. Therefore, it is considered carbon-intensive and not very efficient.</p> </div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p>If renewable energy generation keeps growing steadily, we might see the ErP rating given to electric combi boilers improve in the near future.</p> </div><div class="wordpress-list" style="--59fc38e0:;" data-v-9bc93961><ul class="wordpress-list__wrapper" data-v-9bc93961> <li><strong>Warranty</strong></li> </ul></div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p>Manufacturers provide different warranties for different combi boilers in their range. Terms and conditions may also vary. When choosing your combination boiler, ensure that it comes with a long warranty period. This way, you can rest assured that your boiler will last a long time.</p> </div><div class="wordpress-list" style="--59fc38e0:;" data-v-9bc93961><ul class="wordpress-list__wrapper" data-v-9bc93961> <li><strong>Price</strong></li> </ul></div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p>Last but not least, the price. The total cost of a new combi boiler consists of the boiler unit and installation costs. Special accessories (e.g. smart thermostats, magnetic filters) may also add to the final price. We will talk more about combi boilers' costs in the next section.</p> </div></div><div class="wordpress-group" style="" data-v-30804b50><div class="wordpress-heading u-heading-2 wordpress-heading--h2" style="--c37e9152:left;" data-v-beed8f72> <h2 class="wp-block-heading" id="Cost-of-a-Combination-Boiler">Cost of a combination boiler</h2> </div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p>New <a href="https://www.greenmatch.co.uk/blog/2018/08/new-boiler-cost">combi boiler prices</a> in the UK range from <strong>£500 to £3,000</strong>. Among the factors determining the price, we can list:</p> </div><div class="wordpress-list" style="--59fc38e0:;" data-v-9bc93961><ul class="wordpress-list__wrapper" data-v-9bc93961> <li><strong>The boiler manufacturer you choose</strong></li> <li><strong>The model you want</strong> (budget, mid-range, premium)</li> <li><strong>The type of fuel</strong></li> <li><strong>The combi boiler output rating</strong> (the higher, the more expensive)</li> </ul></div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p>You usually pay a higher price for increased performance and for a prolonged warranty period as well.</p> </div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p>In addition, you have to consider installation costs. On average, boiler installation costs in the UK range from <strong>£1,600 to £3,500</strong>. The two main factors affecting the cost are:</p> </div><div class="wordpress-list" style="--59fc38e0:;" data-v-9bc93961><ul class="wordpress-list__wrapper" data-v-9bc93961> <li><strong>Varying labour costs in different areas</strong> (usually higher in large cities)</li> <li><strong>The specific combi boiler replacement situation</strong></li> </ul></div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p>Regarding the latter, replacing an old combination boiler with a new one is less expensive than replacing a regular or a system boiler with a combi. It is because cylinders and feed tanks need to be removed and the pipework adjusted in the last two cases. Installing a new combi in a space that is difficult to access may also add an extra amount to the bill.</p> </div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p>Probably the best way to keep installation costs as low as possible is to find and compare quotes from different heating engineers in your local area. This allows you to choose the one that best meets your requirements and budget and, therefore, lock in the best deal for you.</p> </div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p>The only downside is that researching and sorting options among dozens of suppliers could take you several hours. Not to mention the time you must spend verifying their credentials and checking customer reviews.</p> </div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p><em>However, this is something we are ready to help you with. At GreenMatch, we work with a network of accredited heating engineers across the UK. Fill out the form, and we will send you up to 3 free quotes from our partner installers. You are not obliged to accept any quote you receive.</em></p> </div><div class="cta-block" style="background-image:linear-gradient(to right, #deeefa, #deeefa);--1554cd56:#000;--4f2215c8:#c3e0f3;--147220ca:rgb(68 68 68);--7b28d34a:rgb(255, 111, 0);--09347c9a:#ffffff;--3bc782e2:rgb(148, 148, 148);--67e53659:#deeefa;--e9b1b55c:#deeefa;--5c587492:#3daee2;--454f35ba:#535456;--20c6ad50:#000;--10fda644:#c3e0f3;--e8a5e7c6:rgb(68 68 68);--143b308c:rgb(255, 111, 0);--33169ddc:#ffffff;--947f57de:rgb(148, 148, 148);--388c8c7a:#5f6265;--224b6ae2:#fff;--90c71118:rgb(var(--base-400));--4c846620:rgb(var(--base-200));--70bbd5b2:rgb(var(--base-200));" data-v-94877ae5><div class="cta-block__header" data-v-94877ae5><div class="cta-block__title" style="color: #3daee2" data-v-94877ae5>Get your best deal</div><div class="cta-block__sub-title" style="color: #535456" data-v-94877ae5>Quickly compare 3 FREE quotes</div></div><div class="cta-block__content-container" data-v-94877ae5><div class="cta-block__usp-container" data-v-94877ae5><div class="cta-block__usps" data-v-94877ae5><ul class="ul1"> <li class="li1">Quotes from local engineers</li> <li class="li1">Payment by finance available</li> <li class="li1">Save up to £975</li> </ul> </div><div class="cta-button cta-button--background" data-v-94877ae5 style="" data-v-ed61c7a3><div class="buttons-orange" data-v-ed61c7a3><div class="link">GET QUOTES NOW</div></div><p class="cta-button__description--text-color cta-button__description" data-v-ed61c7a3><svg xmlns="http://www.w3.org/2000/svg" class="cta-button__icon" fill="none" viewBox="0 0 24 24" stroke="currentColor" stroke-width="2" data-v-ed61c7a3><path stroke-linecap="round" stroke-linejoin="round" d="M12 8v4l3 3m6-3a9 9 0 11-18 0 9 9 0 0118 0z" data-v-ed61c7a3></path></svg> It only takes 30 seconds</p></div><img src="https://cdn.greenmatch.co.uk/cdn-cgi/image/format=auto/2/2023/03/person.png" alt="" width="124" height="277" loading="lazy" data-v-94877ae5></div><div class="cta-block__optimize-home-container" data-v-94877ae5><div class="cta-block__optimize-image-container" data-v-94877ae5><div class="cta-block__optimize-image" data-v-94877ae5><img src="https://cdn.greenmatch.co.uk/cdn-cgi/image/format=auto/2/2023/03/earth-globe-square.svg" alt="Earth globe icon" loading="lazy" data-v-94877ae5></div></div><div class="cta-block__optimize-text" data-v-94877ae5>Optimise your home and save the planet</div></div><div data-v-94877ae5><img src="https://cdn.greenmatch.co.uk/cdn-cgi/image/format=auto/2/2023/03/earth-globe-square.svg" alt="Earth globe icon" loading="lazy" data-v-94877ae5></div></div><div class="cta-block__bottom" style="background-color: #fff" data-v-94877ae5><div class="cta-block__bottom-container" data-v-94877ae5><div class="cta-block__bottom-title-container" style="color: #5f6265" data-v-94877ae5><div class="cta-block__bottom-title" data-v-94877ae5>Call us to get quotes</div><div class="cta-block__bottom-sub-title" data-v-94877ae5>We will get you the best deal</div></div><div class="cta-block__bottom-phonenumber" style="color: rgb(var(--base-400))" data-v-94877ae5><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="currentColor" data-v-94877ae5><path fill-rule="evenodd" d="M1.5 4.5a3 3 0 013-3h1.372c.86 0 1.61.586 1.819 1.42l1.105 4.423a1.875 1.875 0 01-.694 1.955l-1.293.97c-.135.101-.164.249-.126.352a11.285 11.285 0 006.697 6.697c.103.038.25.009.352-.126l.97-1.293a1.875 1.875 0 011.955-.694l4.423 1.105c.834.209 1.42.959 1.42 1.82V19.5a3 3 0 01-3 3h-2.25C8.552 22.5 1.5 15.448 1.5 6.75V4.5z" clip-rule="evenodd" data-v-94877ae5></path></svg><a href="tel:+443308080405" data-v-94877ae5>0330 808 0405</a></div></div></div></div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p></p> </div></div><div class="wordpress-group" style="" data-v-30804b50><div class="wordpress-heading u-heading-2 wordpress-heading--h2" style="--c37e9152:left;" data-v-beed8f72> <h2 class="wp-block-heading" id="FAQ">FAQ</h2> </div><div data-headlessui-state class="faq" data-v-86ecb72c><button id="headlessui-disclosure-button-v-0-91" type="button" aria-expanded="false" data-headlessui-state class="faq__button closed faq__button--has-color" data-v-86ecb72c><div class="faq__title faq__title--has-color" data-v-86ecb72c>Is a combi boiler a good idea?</div><svg class="faq__icon faq__icon--has-color" xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke="currentColor" stroke-width="2" data-v-86ecb72c><path stroke-linecap="round" stroke-linejoin="round" d="M19 9l-7 7-7-7" data-v-86ecb72c></path></svg></button><div id="headlessui-disclosure-panel-v-0-92" hidden style="display:none;" data-headlessui-state class="faq__panel faq__panel--has-color faq__panel-text-parent--has-color" data-v-86ecb72c><p>A combi boiler is definitely a good idea, especially if you want a highly efficient boiler in just a single unit. Here are some of the <a href="#Advantages-of-a-Combi-Boiler">advantages of a combi boiler</a>:</p> <ul> <li>They are highly efficient boilers</li> <li>They can help you save money on your energy bills</li> <li>You can get hot water on demand</li> <li>They are small in size, allowing installation even within a kitchen cupboard</li> </ul> </div></div><div data-headlessui-state class="faq" data-v-86ecb72c><button id="headlessui-disclosure-button-v-0-93" type="button" aria-expanded="false" data-headlessui-state class="faq__button closed faq__button--has-color" data-v-86ecb72c><div class="faq__title faq__title--has-color" data-v-86ecb72c>What are the disadvantages of a combi boiler?</div><svg class="faq__icon faq__icon--has-color" xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke="currentColor" stroke-width="2" data-v-86ecb72c><path stroke-linecap="round" stroke-linejoin="round" d="M19 9l-7 7-7-7" data-v-86ecb72c></path></svg></button><div id="headlessui-disclosure-panel-v-0-94" hidden style="display:none;" data-headlessui-state class="faq__panel faq__panel--has-color faq__panel-text-parent--has-color" data-v-86ecb72c><p>The two main <a href="#Disadvantages-of-a-Combi-Boiler">disadvantages of a combi boiler</a> are:</p> <ul> <li>They are not suitable for large homes with multiple bathrooms</li> <li>They are not ideal for homes with weak mains pressure</li> </ul> </div></div><div data-headlessui-state class="faq" data-v-86ecb72c><button id="headlessui-disclosure-button-v-0-95" type="button" aria-expanded="false" data-headlessui-state class="faq__button closed faq__button--has-color" data-v-86ecb72c><div class="faq__title faq__title--has-color" data-v-86ecb72c>What is the difference between a combi boiler and a regular boiler?</div><svg class="faq__icon faq__icon--has-color" xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke="currentColor" stroke-width="2" data-v-86ecb72c><path stroke-linecap="round" stroke-linejoin="round" d="M19 9l-7 7-7-7" data-v-86ecb72c></path></svg></button><div id="headlessui-disclosure-panel-v-0-96" hidden style="display:none;" data-headlessui-state class="faq__panel faq__panel--has-color faq__panel-text-parent--has-color" data-v-86ecb72c><p>There are two main differences between regular and <a href="#What-is-a-Combi-Boiler">combi boilers</a>:</p> <ul> <li>Space: Combi boilers are very compact. They combine everything needed to heat your water and radiators in a single unit. In stark contrast, regular boilers need hot water storage cylinders and feed tanks.</li> <li>Water demand: Combi boilers are best suited for small to medium-sized homes with 1 bathroom. They may struggle to meet higher demands for hot water. On the other hand, regular boilers can supply multiple hot water outlets at the same time, thanks to the storage cylinder.</li> </ul> </div></div><div data-headlessui-state class="faq" data-v-86ecb72c><button id="headlessui-disclosure-button-v-0-97" type="button" aria-expanded="false" data-headlessui-state class="faq__button closed faq__button--has-color" data-v-86ecb72c><div class="faq__title faq__title--has-color" data-v-86ecb72c>Is a combi boiler gas or electric?</div><svg class="faq__icon faq__icon--has-color" xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke="currentColor" stroke-width="2" data-v-86ecb72c><path stroke-linecap="round" stroke-linejoin="round" d="M19 9l-7 7-7-7" data-v-86ecb72c></path></svg></button><div id="headlessui-disclosure-panel-v-0-98" hidden style="display:none;" data-headlessui-state class="faq__panel faq__panel--has-color faq__panel-text-parent--has-color" data-v-86ecb72c><p>Combi boilers can run on a <a href="#What-Type-of-Heating-is-a-Combi-Boiler">wide variety of fuels</a>, including natural gas, oil, LPG (Liquified Petroleum Gas), and electricity.</p> </div></div><div data-headlessui-state class="faq" data-v-86ecb72c><button id="headlessui-disclosure-button-v-0-99" type="button" aria-expanded="false" data-headlessui-state class="faq__button closed faq__button--has-color" data-v-86ecb72c><div class="faq__title faq__title--has-color" data-v-86ecb72c>Will combi boilers be phased out?</div><svg class="faq__icon faq__icon--has-color" xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke="currentColor" stroke-width="2" data-v-86ecb72c><path stroke-linecap="round" stroke-linejoin="round" d="M19 9l-7 7-7-7" data-v-86ecb72c></path></svg></button><div id="headlessui-disclosure-panel-v-0-100" hidden style="display:none;" data-headlessui-state class="faq__panel faq__panel--has-color faq__panel-text-parent--has-color" data-v-86ecb72c><p>You must be aware that the upcoming boiler ban in the UK will affect all types of gas boilers alike: combi, system, and regular boilers. However, it is still unclear when this will happen. Furthermore, it will apply only to new builds, so replacement gas combi boilers are still fine for existing homes.</p> <p>In any case, combi boilers will not be banned per se, as <a href="#What-Type-of-Heating-is-a-Combi-Boiler">they can run on fuels other than gas</a>, such as electricity.</p> </div></div><div style="" data-v-86ecb72c><script type="application/ld+json">{"@context":"https://schema.org","@type":"FAQPage","mainEntity":[{"@type":"Question","name":"Is a combi boiler a good idea?","acceptedAnswer":{"@type":"Answer","text":"A combi boiler is definitely a good idea, especially if you want a highly efficient boiler in just a single unit. Here are some of the advantages of a combi boiler:\n\nThey are highly efficient boilers\nThey can help you save money on your energy bills\nYou can get hot water on demand\nThey are small in size, allowing installation even within a kitchen cupboard\n\n"}},{"@type":"Question","name":"What are the disadvantages of a combi boiler?","acceptedAnswer":{"@type":"Answer","text":"The two main disadvantages of a combi boiler are:\n\nThey are not suitable for large homes with multiple bathrooms\nThey are not ideal for homes with weak mains pressure\n\n"}},{"@type":"Question","name":"What is the difference between a combi boiler and a regular boiler?","acceptedAnswer":{"@type":"Answer","text":"There are two main differences between regular and combi boilers:\n\nSpace: Combi boilers are very compact. They combine everything needed to heat your water and radiators in a single unit. In stark contrast, regular boilers need hot water storage cylinders and feed tanks.\nWater demand: Combi boilers are best suited for small to medium-sized homes with 1 bathroom. They may struggle to meet higher demands for hot water. On the other hand, regular boilers can supply multiple hot water outlets at the same time, thanks to the storage cylinder.\n\n"}},{"@type":"Question","name":"Is a combi boiler gas or electric?","acceptedAnswer":{"@type":"Answer","text":"Combi boilers can run on a wide variety of fuels, including natural gas, oil, LPG (Liquified Petroleum Gas), and electricity.\n"}},{"@type":"Question","name":"Will combi boilers be phased out?","acceptedAnswer":{"@type":"Answer","text":"You must be aware that the upcoming boiler ban in the UK will affect all types of gas boilers alike: combi, system, and regular boilers. However, it is still unclear when this will happen. Furthermore, it will apply only to new builds, so replacement gas combi boilers are still fine for existing homes.\nIn any case, combi boilers will not be banned per se, as they can run on fuels other than gas, such as electricity.\n"}}]}</script></div></div></div></div><div class="space-y-4"><section class="content-author" data-v-07f80019><div class="content-author__content-container" data-v-07f80019><div class="content-author__image" data-v-07f80019><img src="https://cdn.greenmatch.co.uk/cdn-cgi/image/format=auto/2/2022/10/tony.jpeg" alt="Luis Antonio Gómez Pérez" loading="lazy" data-v-07f80019></div><div class="content-author__content" data-v-07f80019><div class="content-author__content--header" data-v-07f80019><div class="header__socials" data-v-07f80019><a class="button-email" href="/cdn-cgi/l/email-protection#2f5b014840424a55015f4a5d4a556f434a4e4b5c014640" target="_blank" data-v-07f80019><span class="sr-only" data-v-07f80019>Email</span></a></div><div class="header__title" data-v-07f80019><span data-v-07f80019>Written by </span><a href="https://www.greenmatch.co.uk/authors/luis-antonio-gomez-perez" data-v-07f80019>Luis Antonio Gómez Pérez</a><span data-v-07f80019>, Writer</span></div></div><div class="content-author__content--shortbio" data-v-07f80019><p>Luis Antonio is a seasoned Content Writer with international journalism experience. His writing style, enriched by a Master’s in Journalism, contributes informative content to GreenMatch on topics including low-carbon heating systems.</p> </div></div></div></section><div class="related-articles" data-v-2534d049><div class="related-articles__title" data-v-2534d049>Related Articles</div><div class="related-articles__articles" data-v-2534d049><div class="related-articles__article" data-v-2534d049><a class="related-articles__article-inner" href="https://www.greenmatch.co.uk/boilers/electric/combi" data-v-2534d049><div class="related-articles__article-image-wrapper" data-v-2534d049><img src="https://cdn.greenmatch.co.uk/cdn-cgi/image/w=152,h=152,fit=cover,f=auto/2/2022/10/electric-combi-boilers.jpg" alt="Electric Combi Boilers" class="related-articles__article-image" loading="lazy" data-v-2534d049></div><div class="related-articles__article-title" data-v-2534d049>Electric Combi Boilers</div></a></div><div class="related-articles__article" data-v-2534d049><a class="related-articles__article-inner" href="https://www.greenmatch.co.uk/boilers/combi-boilers/oil-fired-combi-boilers" data-v-2534d049><div class="related-articles__article-image-wrapper" data-v-2534d049><img src="https://cdn.greenmatch.co.uk/cdn-cgi/image/w=152,h=152,fit=cover,f=auto/2/2022/10/oil-fired-boiler-1.jpg" alt="Oil Fired Combi Boilers" class="related-articles__article-image" loading="lazy" data-v-2534d049></div><div class="related-articles__article-title" data-v-2534d049>Oil Fired Combi Boilers</div></a></div><div class="related-articles__article" data-v-2534d049><a class="related-articles__article-inner" href="https://www.greenmatch.co.uk/boilers/combi-boilers/combi-boiler-installation" data-v-2534d049><div class="related-articles__article-image-wrapper" data-v-2534d049><img src="https://cdn.greenmatch.co.uk/cdn-cgi/image/w=152,h=152,fit=cover,f=auto/2/2024/07/Combi-boiler-installation.png" alt="Combi Boiler Installation" class="related-articles__article-image" loading="lazy" data-v-2534d049></div><div class="related-articles__article-title" data-v-2534d049>Combi Boiler Installation</div></a></div></div></div><div class="more-on-this-topic" data-v-088378b7><div class="more-on-this-topic__title" data-v-088378b7>More on This Topic</div><ul class="more-on-this-topic__list" data-v-088378b7><div class="more-on-this-topic__item" data-v-088378b7><li class="more-on-this-topic__item-inner" data-v-088378b7><a class="more-on-this-topic__item-link" href="https://www.greenmatch.co.uk/boilers/combi-boilers/oil-fired-combi-boilers" data-v-088378b7>Oil Fired Combi Boilers</a></li></div><div class="more-on-this-topic__item" data-v-088378b7><li class="more-on-this-topic__item-inner" data-v-088378b7><a class="more-on-this-topic__item-link" href="https://www.greenmatch.co.uk/boilers/combi-boilers/small-combi-boilers" data-v-088378b7>Small Combi Boilers</a></li></div><div class="more-on-this-topic__item" data-v-088378b7><li class="more-on-this-topic__item-inner" data-v-088378b7><a class="more-on-this-topic__item-link" href="https://www.greenmatch.co.uk/boilers/combi-boilers/combi-boiler-installation" data-v-088378b7>Combi Boiler Installation</a></li></div></ul></div></div></div><div class="sidebar" data-v-6c955e7f><div class="its-that-easy" data-v-6c955e7f data-v-b5448dc3><div class="its-that-easy__title" data-v-b5448dc3>How It Works</div><div class="its-that-easy__usps" data-v-b5448dc3><div class="its-that-easy__usp" data-v-b5448dc3><div class="its-that-easy__number-container" data-v-b5448dc3><div class="its-that-easy__number" data-v-b5448dc3>1</div></div><div class="its-that-easy__usp-content" data-v-b5448dc3><div class="its-that-easy__usp-title" data-v-b5448dc3>Answer a few simple questions</div> Describe your requirements by answering some super quick and easy questions</div></div><div class="its-that-easy__usp" data-v-b5448dc3><div class="its-that-easy__number-container" data-v-b5448dc3><div class="its-that-easy__number" data-v-b5448dc3>2</div></div><div class="its-that-easy__usp-content" data-v-b5448dc3><div class="its-that-easy__usp-title" data-v-b5448dc3>Talk to installers</div> Up to 4 installers will get in touch with you directly</div></div><div class="its-that-easy__usp" data-v-b5448dc3><div class="its-that-easy__number-container" data-v-b5448dc3><div class="its-that-easy__number" data-v-b5448dc3>3</div></div><div class="its-that-easy__usp-content" data-v-b5448dc3><div class="its-that-easy__usp-title" data-v-b5448dc3>Receive up to 4 quotes</div> Compare quotes and select the best option for you</div></div></div></div><div class="become-a-partner-container" data-v-6c955e7f data-v-66f83ad8><div class="become-a-partner__title" data-v-66f83ad8>Become a Partner</div><div class="become-a-partner__inner" data-v-66f83ad8><div class="become-a-partner__top" data-v-66f83ad8><p class="become-a-partner__text" data-v-66f83ad8>We strive to connect our customers with the right product and supplier. Would you like to be part of GreenMatch?</p><img src="https://cdn.greenmatch.co.uk/cdn-cgi/image/format=auto/2/2023/02/become-a-partner.svg" class="become-a-partner__image" alt="Become a Partner" loading="lazy" data-v-66f83ad8></div><div data-v-66f83ad8><a href="https://www.greenmatch.co.uk/supplier-sign-up" class="become-a-partner__button" data-v-66f83ad8>Apply now</a></div></div></div><div class="sidebar__sticky" data-v-6c955e7f><div data-headlessui-state="open" class="guide-container" data-v-6c955e7f data-v-39639fae><button id="headlessui-disclosure-button-v-0-101" type="button" aria-expanded="true" aria-controls="headlessui-disclosure-panel-v-0-102" data-headlessui-state="open" class="guide" data-v-39639fae><span class="guide__title" data-v-39639fae>Learn More in Our Guide</span><svg class="guide__icon" xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke="currentColor" stroke-width="2" data-v-39639fae><path stroke-linecap="round" stroke-linejoin="round" d="M19 9l-7 7-7-7" data-v-39639fae></path></svg></button><div id="headlessui-disclosure-panel-v-0-102" data-headlessui-state="open" class="guide__content" data-v-39639fae data-v-39639fae><ul class="guide__content-items" data-v-39639fae><li class="guide__content-item" data-v-39639fae><a class="guide__content-item-link active" href="#what-is-a-combi" data-v-39639fae>What is a Combi Boiler? A Full Explanation & Details</a></li><li class="guide__content-item" data-v-39639fae><a class="guide__content-item-link" href="#What-Type-of-Heating-is-a-Combi-Boiler" data-v-39639fae>What type of heating is a combi boiler</a></li><li class="guide__content-item" data-v-39639fae><a class="guide__content-item-link" href="#How-Does-a-Combination-Boiler-Work" data-v-39639fae>How does a combination boiler work</a></li><li class="guide__content-item" data-v-39639fae><a class="guide__content-item-link" href="#Advantages-of-a-Combi-Boiler" data-v-39639fae>Advantages of a combi boiler</a></li><li class="guide__content-item" data-v-39639fae><a class="guide__content-item-link" href="#Disadvantages-of-a-Combi-Boiler" data-v-39639fae>Disadvantages of a combi boiler</a></li><li class="guide__content-item" data-v-39639fae><a class="guide__content-item-link" href="#What-Should-You-Consider-When-Choosing-a-Combi-Boiler" data-v-39639fae>What should you consider when choosing a combi boiler</a></li><li 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