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A Complete Guide","yoastHead":"\n\n<meta name=\"description\" content=\"Find out everything you need to know about boiler sizes for combi, electric and other boiler types.\" 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/what-size-boiler-do-i-need\" 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 Size Boiler Do I Need in the UK? 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A Complete Guide\",\"isPartOf\":{\"@id\":\"https://www.greenmatch.co.uk/#website\"},\"primaryImageOfPage\":{\"@id\":\"https://www.greenmatch.co.uk/boilers/what-size-boiler-do-i-need#primaryimage\"},\"image\":{\"@id\":\"https://www.greenmatch.co.uk/boilers/what-size-boiler-do-i-need#primaryimage\"},\"thumbnailUrl\":\"https://cdn.greenmatch.co.uk/cdn-cgi/image/format=auto/2/2023/08/What-size-boiler_Hero.png\",\"datePublished\":\"2023-08-09T10:06:23+00:00\",\"dateModified\":\"2024-09-10T11:30:16+00:00\",\"description\":\"Find out everything you need to know about boiler sizes for combi, electric and other boiler types.\",\"breadcrumb\":{\"@id\":\"https://www.greenmatch.co.uk/boilers/what-size-boiler-do-i-need#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https://www.greenmatch.co.uk/boilers/what-size-boiler-do-i-need\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https://www.greenmatch.co.uk/boilers/what-size-boiler-do-i-need#primaryimage\",\"url\":\"https://cdn.greenmatch.co.uk/cdn-cgi/image/format=auto/2/2023/08/What-size-boiler_Hero.png\",\"contentUrl\":\"https://cdn.greenmatch.co.uk/cdn-cgi/image/format=auto/2/2023/08/What-size-boiler_Hero.png\",\"width\":730,\"height\":330,\"caption\":\"What size boiler do I need\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https://www.greenmatch.co.uk/boilers/what-size-boiler-do-i-need#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"GreenMatch\",\"item\":\"https://www.greenmatch.co.uk/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Boilers\",\"item\":\"https://www.greenmatch.co.uk/boilers\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"What Size Boiler do I Need\"}]},{\"@type\":\"WebSite\",\"@id\":\"https://www.greenmatch.co.uk/#website\",\"url\":\"https://www.greenmatch.co.uk/\",\"name\":\"GreenMatch.co.uk\",\"description\":\"\",\"inLanguage\":\"en-US\"}]}</script>\n","template":"content-and-sidebar.php","contentTitle":"What Size Boiler do I Need","content":[{"blockName":"core/group","attrs":[],"innerBlocks":[{"blockName":"core/heading","attrs":{"level":1},"innerBlocks":[],"innerHTML":"\n<h1 class=\"wp-block-heading\" id=\"h1\">What Size Boiler Do I Need in the UK? A Complete Guide</h1>\n","innerContent":["\n<h1 class=\"wp-block-heading\" id=\"h1\">What Size Boiler Do I Need in the UK? A Complete Guide</h1>\n"]},{"blockName":"acf/macro-author-byline","attrs":{"name":"acf/macro-author-byline","mode":"preview","bindData":[]},"innerBlocks":[],"innerHTML":"","innerContent":[],"isValid":true,"theme":"greenmatch"},{"blockName":"core/image","attrs":{"id":75172,"sizeSlug":"full","linkDestination":"none","className":"no-shadow"},"innerBlocks":[],"innerHTML":"\n<figure class=\"wp-block-image size-full no-shadow\"><img src=\"https://cdn.greenmatch.co.uk/cdn-cgi/image/format=auto/2/2023/08/What-size-boiler_Hero.png\" alt=\"What size boiler do I need\" class=\"wp-image-75172\" /></figure>\n","innerContent":["\n<figure class=\"wp-block-image size-full no-shadow\"><img src=\"https://cdn.greenmatch.co.uk/cdn-cgi/image/format=auto/2/2023/08/What-size-boiler_Hero.png\" alt=\"What size boiler do I need\" class=\"wp-image-75172\" /></figure>\n"]},{"blockName":"core/html","attrs":[],"innerBlocks":[],"innerHTML":"\n<ul class=\"checkmarks-colored\">\n<li>The right combi boiler size for a 3-4 bedroom house is <strong>28 to 34kW</strong></li>\n<li>The right system boiler size for a 3-4 bedroom house is <strong>18 to 26kW</strong></li>\n<li>The right conventional boiler size for a 3-4 bedroom house is <strong>18 to 26kW.</strong></li>\n</ul>\n","innerContent":["\n<ul class=\"checkmarks-colored\">\n<li>The right combi boiler size for a 3-4 bedroom house is <strong>28 to 34kW</strong></li>\n<li>The right system boiler size for a 3-4 bedroom house is <strong>18 to 26kW</strong></li>\n<li>The right conventional boiler size for a 3-4 bedroom house is <strong>18 to 26kW.</strong></li>\n</ul>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p>When it comes to your heating needs, choosing the right <a href=\"https://www.greenmatch.co.uk/boilers\">boiler</a> can seem difficult. One of the main considerations is getting the right size, both in dimensions and heat output, for your home. If you’re wondering “What size boiler do I need?”, this article will help you determine just that.</p>\n","innerContent":["\n<p>When it comes to your heating needs, choosing the right <a href=\"https://www.greenmatch.co.uk/boilers\">boiler</a> can seem difficult. One of the main considerations is getting the right size, both in dimensions and heat output, for your home. If you’re wondering “What size boiler do I need?”, this article will help you determine just that.</p>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p>You can also watch the video below for a quick overview of how to calculate the best boiler size for your home:</p>\n","innerContent":["\n<p>You can also watch the video below for a quick overview of how to calculate the best boiler size for your home:</p>\n"]},{"blockName":"acf/macro-embed-video","attrs":{"name":"acf/macro-embed-video","data":{"videoid":"yPWYXgz4hcA","_videoid":"field_macro_embed_video_videoid","forcetranslatedsubtitles":"0","_forcetranslatedsubtitles":"field_macro_embed_video_forcetranslatedsubtitles","title":"Choosing the Right Size Boiler - How to Calculate?","_title":"field_macro_embed_video_title","description":"Size is one of the most important factors when choosing the right boiler for your house - and we don't mean physical size. In this video we go through why it is important, and how you can calculate an estimate for the ideal size boiler for your home. If you want to get an exact figure, it is always best to contact a professional heating engineer, and we can help you with that! If you fill in our form, we can connect you with up to 3 Gas Safe engineers, who can help you figure out the perfect boiler for you, and give you their offers!","_description":"field_macro_embed_video_description","transcript":"when choosing a new boiler its size is\r\none of the most important factors to\r\nconsider and we're not talking about the\r\nphysical size either we're actually\r\ntalking about the output size and\r\ncapacity of the boiler as in how many\r\nkilowatts of energy it can produce not\r\nthat physical Size Doesn't Matter the\r\noutput size of a boiler is very\r\nimportant because if its output is too\r\nsmall your boiler could struggle to\r\nsufficiently heat your house on the\r\nother hand a boiler with an output\r\nthat's way too big can end up wasting\r\nenergy and therefore your money too but\r\nluckily it's not too hard to work out\r\nthe appropriate size for your home at\r\nits simplest the formula to determine\r\nthis is to allow for 1.5 or 2 KW for\r\nevery Radiator in your home for example\r\na home with 10 radiators would need a\r\nboiler with an output of 15 to 20 Kow\r\nthis will of course vary a bit depending\r\non the size of your radiators the type\r\nof boiler you choose and even based on\r\nhow well insulated your house is That's\r\nwhy you should use the calculation just\r\nas a general guide if you want to get an\r\nexact figure it is always best to\r\ncontact a professional heating engineer\r\nand that's something that we can\r\nactually help with if you fill in our\r\nform we can connect you with up to three\r\ngas safe Engineers who can help you\r\nfigure out the perfect boiler for you\r\nand give you their offers you can then\r\ncompare them and pick the one that's\r\nbest for you our service is completely\r\nfree and non-binding just click the link\r\nin the description to get started now as\r\nyou've maybe not counted the radiators\r\nin your home recently we'd thought we'd\r\nlist some common home sizes and the\r\nboiler output that would be suitable for\r\nthem the most common boiler type in the\r\nUK is a Combi boiler and the majority of\r\nUK homes use boilers with outputs\r\nbetween 24 and 42 KW a one to\r\ntwo-bedroom property with up to 10\r\nradiators and one bathroom will\r\ngenerally need a Combi boiler with an\r\noutput size of 18 to 27 KW this goes up\r\nto around 28 to 34 Kow for a 3 to four\r\nbedroom property that has up to 15\r\nradiators and 2 to three bathrooms while\r\na large five-bedroom home with 15 to 20\r\nradiators and 3 to four bathrooms will\r\nrequire a boiler with an output of\r\nbetween 35 and 43 KW it's worth noting\r\nthat we don't recommend Combi boilers\r\nfor homes that have three to four\r\nbedrooms and multiple bathrooms as they\r\nare usually not capable of meeting the\r\nhigh hot water Demands a property of\r\nthat size provides in these cases system\r\nand conventional boilers are recommended\r\nagain all of these examples are just\r\nguidelines and the numbers will change\r\nbased on which type of boiler you choose\r\nand how efficient your radiators are so\r\ndon't forget that to get quotes from up\r\nto three local installers that can help\r\nyou make the right choice all you need\r\nto do is fill in our form thank you and\r\nI'll see you in the next\r\none","_transcript":"field_macro_embed_video_transcript","duration":"PT3M18S","_duration":"field_macro_embed_video_duration","uploaddate":"2024-02-12T07:15:03Z","_uploaddate":"field_macro_embed_video_uploaddate","alternativethumbnail":"0","_alternativethumbnail":"field_macro_embed_video_alternativethumbnail"},"mode":"preview","bindData":{"videoId":"yPWYXgz4hcA","forceTranslatedSubtitles":false,"title":"Choosing the Right Size Boiler - How to Calculate?","description":"<p>Size is one of the most important factors when choosing the right boiler for your house &#8211; and we don&#8217;t mean physical size. In this video we go through why it is important, and how you can calculate an estimate for the ideal size boiler for your home. If you want to get an exact figure, it is always best to contact a professional heating engineer, and we can help you with that! If you fill in our form, we can connect you with up to 3 Gas Safe engineers, who can help you figure out the perfect boiler for you, and give you their offers!</p>\n","transcript":"<p>when choosing a new boiler its size is<br />\none of the most important factors to<br />\nconsider and we&#8217;re not talking about the<br />\nphysical size either we&#8217;re actually<br />\ntalking about the output size and<br />\ncapacity of the boiler as in how many<br />\nkilowatts of energy it can produce not<br />\nthat physical Size Doesn&#8217;t Matter the<br />\noutput size of a boiler is very<br />\nimportant because if its output is too<br />\nsmall your boiler could struggle to<br />\nsufficiently heat your house on the<br />\nother hand a boiler with an output<br />\nthat&#8217;s way too big can end up wasting<br />\nenergy and therefore your money too but<br />\nluckily it&#8217;s not too hard to work out<br />\nthe appropriate size for your home at<br />\nits simplest the formula to determine<br />\nthis is to allow for 1.5 or 2 KW for<br />\nevery Radiator in your home for example<br />\na home with 10 radiators would need a<br />\nboiler with an output of 15 to 20 Kow<br />\nthis will of course vary a bit depending<br />\non the size of your radiators the type<br />\nof boiler you choose and even based on<br />\nhow well insulated your house is That&#8217;s<br />\nwhy you should use the calculation just<br />\nas a general guide if you want to get an<br />\nexact figure it is always best to<br />\ncontact a professional heating engineer<br />\nand that&#8217;s something that we can<br />\nactually help with if you fill in our<br />\nform we can connect you with up to three<br />\ngas safe Engineers who can help you<br />\nfigure out the perfect boiler for you<br />\nand give you their offers you can then<br />\ncompare them and pick the one that&#8217;s<br />\nbest for you our service is completely<br />\nfree and non-binding just click the link<br />\nin the description to get started now as<br />\nyou&#8217;ve maybe not counted the radiators<br />\nin your home recently we&#8217;d thought we&#8217;d<br />\nlist some common home sizes and the<br />\nboiler output that would be suitable for<br />\nthem the most common boiler type in the<br />\nUK is a Combi boiler and the majority of<br />\nUK homes use boilers with outputs<br />\nbetween 24 and 42 KW a one to<br />\ntwo-bedroom property with up to 10<br />\nradiators and one bathroom will<br />\ngenerally need a Combi boiler with an<br />\noutput size of 18 to 27 KW this goes up<br />\nto around 28 to 34 Kow for a 3 to four<br />\nbedroom property that has up to 15<br />\nradiators and 2 to three bathrooms while<br />\na large five-bedroom home with 15 to 20<br />\nradiators and 3 to four bathrooms will<br />\nrequire a boiler with an output of<br />\nbetween 35 and 43 KW it&#8217;s worth noting<br />\nthat we don&#8217;t recommend Combi boilers<br />\nfor homes that have three to four<br />\nbedrooms and multiple bathrooms as they<br />\nare usually not capable of meeting the<br />\nhigh hot water Demands a property of<br />\nthat size provides in these cases system<br />\nand conventional boilers are recommended<br />\nagain all of these examples are just<br />\nguidelines and the numbers will change<br />\nbased on which type of boiler you choose<br />\nand how efficient your radiators are so<br />\ndon&#8217;t forget that to get quotes from up<br />\nto three local installers that can help<br />\nyou make the right choice all you need<br />\nto do is fill in our form thank you and<br />\nI&#8217;ll see you in the next<br />\none</p>\n","duration":"PT3M18S","uploadDate":"2024-02-12T07:15:03Z","alternativeThumbnail":false}},"innerBlocks":[],"innerHTML":"","innerContent":[],"isValid":true,"theme":"greenmatch"},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p>But first, if you’re already on the hunt for a boiler, you’ll need a professional you can trust. Researching different installers, vet them for trustworthiness, and compare their prices on your own can be laborious. This can end up taking days, but with our handy service, you can easily find a trusted installer with us doing the legwork. </p>\n","innerContent":["\n<p>But first, if you’re already on the hunt for a boiler, you’ll need a professional you can trust. Researching different installers, vet them for trustworthiness, and compare their prices on your own can be laborious. This can end up taking days, but with our handy service, you can easily find a trusted installer with us doing the legwork. </p>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p><em>All you have to do is fill out a 30-second form and we will begin providing you with prices from our network of dependable local professionals. Click the button below to <strong>obtain up to 3 free, non-binding quotes</strong> from vetted engineers in your area.</em></p>\n","innerContent":["\n<p><em>All you have to do is fill out a 30-second form and we will begin providing you with prices from our network of dependable local professionals. Click the button below to <strong>obtain up to 3 free, non-binding quotes</strong> from vetted engineers in your area.</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":"edit","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 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size vs boiler dimensions #boiler-size\r\nWhy is choosing the correct boiler size important? #why\r\nWhat influences which boiler size is the best for your UK household? #what-influences\r\nWhat size boiler do I need per boiler type? #what-size\r\nInterested in buying a new boiler? #buying-new-boiler\r\nFAQ #faq","_list":"field_macro_card_list","fieldMacroTableOfContentsBackgroundColor":"","_fieldMacroTableOfContentsBackgroundColor":"field_macro_table_of_contents_background_color"},"mode":"preview","bindData":{"heading":"","list":"Boiler size vs boiler dimensions #boiler-size\r\nWhy is choosing the correct boiler size important? #why\r\nWhat influences which boiler size is the best for your UK household? #what-influences\r\nWhat size boiler do I need per boiler type? #what-size\r\nInterested in buying a new boiler? #buying-new-boiler\r\nFAQ #faq","backgroundColor":""}},"innerBlocks":[],"innerHTML":"","innerContent":[],"isValid":true,"theme":"greenmatch"},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p></p>\n","innerContent":["\n<p></p>\n"]},{"blockName":"core/heading","attrs":[],"innerBlocks":[],"innerHTML":"\n<h2 class=\"wp-block-heading\" id=\"boiler-size\">Boiler size vs boiler dimensions</h2>\n","innerContent":["\n<h2 class=\"wp-block-heading\" id=\"boiler-size\">Boiler size vs boiler dimensions</h2>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p>When it comes to boiler size, we aren’t always talking about the physical space it takes. More often, size is about efficiency, power input, and heat output. When thinking about size, you should ask “What kW boiler do I need” rather than how much space it takes.</p>\n","innerContent":["\n<p>When it comes to boiler size, we aren’t always talking about the physical space it takes. More often, size is about efficiency, power input, and heat output. When thinking about size, you should ask “What kW boiler do I need” rather than how much space it takes.</p>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p>While dimensions can be important for planning the physical space in your house, boiler size is crucial in determining whether your boiler is up to the task. Boiler size can determine whether the heating system can manage to heat your home and should be considered alongside how efficiently it operates. Generally, the larger your home the larger the boiler you will need.</p>\n","innerContent":["\n<p>While dimensions can be important for planning the physical space in your house, boiler size is crucial in determining whether your boiler is up to the task. Boiler size can determine whether the heating system can manage to heat your home and should be considered alongside how efficiently it operates. Generally, the larger your home the larger the boiler you will need.</p>\n"]},{"blockName":"core/heading","attrs":[],"innerBlocks":[],"innerHTML":"\n<h2 class=\"wp-block-heading\" id=\"why\">Why is choosing the right boiler size important?</h2>\n","innerContent":["\n<h2 class=\"wp-block-heading\" id=\"why\">Why is choosing the right boiler size important?</h2>\n"]},{"blockName":"core/image","attrs":{"id":75230,"sizeSlug":"full","linkDestination":"none","className":"no-shadow"},"innerBlocks":[],"innerHTML":"\n<figure class=\"wp-block-image size-full no-shadow\"><img src=\"https://cdn.greenmatch.co.uk/cdn-cgi/image/format=auto/2/2023/08/What-size-boiler_Pros.png\" alt=\"Why choosing the right boiler size is important\" class=\"wp-image-75230\" /></figure>\n","innerContent":["\n<figure class=\"wp-block-image size-full no-shadow\"><img src=\"https://cdn.greenmatch.co.uk/cdn-cgi/image/format=auto/2/2023/08/What-size-boiler_Pros.png\" alt=\"Why choosing the right boiler size is important\" class=\"wp-image-75230\" /></figure>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p>The correct boiler size can have an impact on your electricity and/or gas bills, so it’s important to focus on power and efficiency. If a boiler is too big for your home, you may end up spending unnecessary money on it. If it’s too small, you may not be able to adequately heat all the areas of your house. This is why finding the right balance is important.</p>\n","innerContent":["\n<p>The correct boiler size can have an impact on your electricity and/or gas bills, so it’s important to focus on power and efficiency. If a boiler is too big for your home, you may end up spending unnecessary money on it. If it’s too small, you may not be able to adequately heat all the areas of your house. This is why finding the right balance is important.</p>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p>Most modern boilers can adjust their energy usage to the amount you need, except conventional or heat-only boilers, which can waste energy and produce excess heat that will increase your energy bills. They may also consume extra fuel and use up more energy than you need.</p>\n","innerContent":["\n<p>Most modern boilers can adjust their energy usage to the amount you need, except conventional or heat-only boilers, which can waste energy and produce excess heat that will increase your energy bills. They may also consume extra fuel and use up more energy than you need.</p>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p>Aside from efficiency and heating, changing the size of your boiler can have advantages for your house. If your home has a conventional boiler but does not need the heating output it provides (possibly because it’s a smaller home), you can free up a lot of space by getting a combi boiler.&nbsp;</p>\n","innerContent":["\n<p>Aside from efficiency and heating, changing the size of your boiler can have advantages for your house. If your home has a conventional boiler but does not need the heating output it provides (possibly because it’s a smaller home), you can free up a lot of space by getting a combi boiler.&nbsp;</p>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p>A <a href=\"https://www.greenmatch.co.uk/blog/boiler-replacement\">boiler replacement</a> that adds more modern heating can also allow you to improve the energy efficiency of your home, adding value to the house and decreasing your carbon footprint to better match lower energy and/or gas consumption.</p>\n","innerContent":["\n<p>A <a href=\"https://www.greenmatch.co.uk/blog/boiler-replacement\">boiler replacement</a> that adds more modern heating can also allow you to improve the energy efficiency of your home, adding value to the house and decreasing your carbon footprint to better match lower energy and/or gas consumption.</p>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p>On the other hand, a more powerful boiler can benefit large properties by ensuring stable water pressure. Combi boilers are best for one-shower households but system and conventional boilers can operate multiple hot taps and showers simultaneously. However, this also means that higher power systems incur higher <a href=\"https://www.greenmatch.co.uk/blog/2018/08/new-boiler-cost\">boiler costs</a>, so choose wisely.</p>\n","innerContent":["\n<p>On the other hand, a more powerful boiler can benefit large properties by ensuring stable water pressure. Combi boilers are best for one-shower households but system and conventional boilers can operate multiple hot taps and showers simultaneously. However, this also means that higher power systems incur higher <a href=\"https://www.greenmatch.co.uk/blog/2018/08/new-boiler-cost\">boiler costs</a>, so choose wisely.</p>\n"]},{"blockName":"core/heading","attrs":[],"innerBlocks":[],"innerHTML":"\n<h2 class=\"wp-block-heading\" id=\"what-influences\">What influences what boiler size is best for your UK household?</h2>\n","innerContent":["\n<h2 class=\"wp-block-heading\" id=\"what-influences\">What influences what boiler size is best for your UK household?</h2>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p>Let’s go over the 2 most important factors to consider when selecting the boiler size you need. These are the energy needs of your home and the type of boiler you want to purchase.</p>\n","innerContent":["\n<p>Let’s go over the 2 most important factors to consider when selecting the boiler size you need. These are the energy needs of your home and the type of boiler you want to purchase.</p>\n"]},{"blockName":"core/heading","attrs":{"level":3},"innerBlocks":[],"innerHTML":"\n<h3 class=\"wp-block-heading\">Size of your house and amount of radiators</h3>\n","innerContent":["\n<h3 class=\"wp-block-heading\">Size of your house and amount of radiators</h3>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p>The size of your house and its energy requirements decide what kW boiler you need to heat your home properly. To accurately gauge the size of your house and what boiler size will be best suited for it, you need to consider:</p>\n","innerContent":["\n<p>The size of your house and its energy requirements decide what kW boiler you need to heat your home properly. To accurately gauge the size of your house and what boiler size will be best suited for it, you need to consider:</p>\n"]},{"blockName":"core/list","attrs":[],"innerBlocks":[{"blockName":"core/list-item","attrs":[],"innerBlocks":[],"innerHTML":"\n<li>Number of bedrooms</li>\n","innerContent":["\n<li>Number of bedrooms</li>\n"]},{"blockName":"core/list-item","attrs":[],"innerBlocks":[],"innerHTML":"\n<li>Number of radiators</li>\n","innerContent":["\n<li>Number of radiators</li>\n"]},{"blockName":"core/list-item","attrs":[],"innerBlocks":[],"innerHTML":"\n<li>Number of bathrooms</li>\n","innerContent":["\n<li>Number of bathrooms</li>\n"]},{"blockName":"core/list-item","attrs":[],"innerBlocks":[],"innerHTML":"\n<li>How well-insulated your home is</li>\n","innerContent":["\n<li>How well-insulated your home is</li>\n"]}],"innerHTML":"\n<ul>\n\n\n\n\n\n</ul>\n","innerContent":["\n<ul>",null,"\n\n",null,"\n\n",null,"\n\n",null,"</ul>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p>The number of radiators, bedrooms, and bathrooms each constitutes a heating or water usage source, which requires more power from a boiler.</p>\n","innerContent":["\n<p>The number of radiators, bedrooms, and bathrooms each constitutes a heating or water usage source, which requires more power from a boiler.</p>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p>Homes with adequate insulation tend to preserve heat better and thus require less work from the boiler. Older houses may need a more powerful boiler for this same reason.</p>\n","innerContent":["\n<p>Homes with adequate insulation tend to preserve heat better and thus require less work from the boiler. Older houses may need a more powerful boiler for this same reason.</p>\n"]},{"blockName":"core/heading","attrs":{"level":3},"innerBlocks":[],"innerHTML":"\n<h3 class=\"wp-block-heading\" id=\"boiler-types\">Which boiler do I need? Boiler types and size differences</h3>\n","innerContent":["\n<h3 class=\"wp-block-heading\" id=\"boiler-types\">Which boiler do I need? Boiler types and size differences</h3>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p>Considering how they work, there are 3 main types of boilers:</p>\n","innerContent":["\n<p>Considering how they work, there are 3 main types of boilers:</p>\n"]},{"blockName":"core/list","attrs":[],"innerBlocks":[{"blockName":"core/list-item","attrs":[],"innerBlocks":[],"innerHTML":"\n<li><a href=\"https://www.greenmatch.co.uk/boilers/combi-boilers\">Combi boilers</a>&nbsp;</li>\n","innerContent":["\n<li><a href=\"https://www.greenmatch.co.uk/boilers/combi-boilers\">Combi boilers</a>&nbsp;</li>\n"]},{"blockName":"core/list-item","attrs":[],"innerBlocks":[],"innerHTML":"\n<li><a href=\"https://www.greenmatch.co.uk/boilers/system\">System boilers</a></li>\n","innerContent":["\n<li><a href=\"https://www.greenmatch.co.uk/boilers/system\">System boilers</a></li>\n"]},{"blockName":"core/list-item","attrs":[],"innerBlocks":[],"innerHTML":"\n<li><a href=\"https://www.greenmatch.co.uk/boilers/conventional\">Conventional boilers</a> or regular boilers</li>\n","innerContent":["\n<li><a href=\"https://www.greenmatch.co.uk/boilers/conventional\">Conventional boilers</a> or regular boilers</li>\n"]}],"innerHTML":"\n<ul>\n\n\n\n</ul>\n","innerContent":["\n<ul>",null,"\n\n",null,"\n\n",null,"</ul>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p>Boilers can also be categorised in terms of the fuel they use:</p>\n","innerContent":["\n<p>Boilers can also be categorised in terms of the fuel they use:</p>\n"]},{"blockName":"core/list","attrs":[],"innerBlocks":[{"blockName":"core/list-item","attrs":[],"innerBlocks":[],"innerHTML":"\n<li>Gas boilers (with combi gas boilers being the most popular ones in the UK)</li>\n","innerContent":["\n<li>Gas boilers (with combi gas boilers being the most popular ones in the UK)</li>\n"]},{"blockName":"core/list-item","attrs":[],"innerBlocks":[],"innerHTML":"\n<li>Electric boilers</li>\n","innerContent":["\n<li>Electric boilers</li>\n"]},{"blockName":"core/list-item","attrs":[],"innerBlocks":[],"innerHTML":"\n<li>Oil boilers</li>\n","innerContent":["\n<li>Oil boilers</li>\n"]},{"blockName":"core/list-item","attrs":[],"innerBlocks":[],"innerHTML":"\n<li>Biomass boilers</li>\n","innerContent":["\n<li>Biomass boilers</li>\n"]}],"innerHTML":"\n<ul>\n\n\n\n\n\n</ul>\n","innerContent":["\n<ul>",null,"\n\n",null,"\n\n",null,"\n\n",null,"</ul>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p>If you require running more than one bath simultaneously, it’s best to eschew combi boilers for systems or conventional ones. Similarly, the number of bedrooms and the heat output you expect from the radiators may influence whether you need conventional and system boilers, which can handle higher loads.&nbsp;</p>\n","innerContent":["\n<p>If you require running more than one bath simultaneously, it’s best to eschew combi boilers for systems or conventional ones. Similarly, the number of bedrooms and the heat output you expect from the radiators may influence whether you need conventional and system boilers, which can handle higher loads.&nbsp;</p>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p>While gas boilers can also have a high-power output, they are only applicable if your home already has a gas main. Similarly, conventional boilers require an attic space or an airing cupboard since they come with extra parts. System boilers also require a cylinder which can take up space, so be sure to choose the right boiler based on the specifications of your home.</p>\n","innerContent":["\n<p>While gas boilers can also have a high-power output, they are only applicable if your home already has a gas main. Similarly, conventional boilers require an attic space or an airing cupboard since they come with extra parts. System boilers also require a cylinder which can take up space, so be sure to choose the right boiler based on the specifications of your home.</p>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p>Alternatively, if you have a small home and would prefer a more efficient system, gas or <a href=\"https://www.greenmatch.co.uk/boilers/electric/combi\">electric combi boilers</a> can both be great. They can have an efficiency rating of up to 98%, making them ideal for smaller homes. These boilers can also save physical space as they have smaller overall dimensions (due to the lack of external parts like water tanks and cylinders).</p>\n","innerContent":["\n<p>Alternatively, if you have a small home and would prefer a more efficient system, gas or <a href=\"https://www.greenmatch.co.uk/boilers/electric/combi\">electric combi boilers</a> can both be great. They can have an efficiency rating of up to 98%, making them ideal for smaller homes. These boilers can also save physical space as they have smaller overall dimensions (due to the lack of external parts like water tanks and cylinders).</p>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p>The main difference between the two is that electric combi boilers purely rely on electricity while traditional combi boilers also utilise gas.</p>\n","innerContent":["\n<p>The main difference between the two is that electric combi boilers purely rely on electricity while traditional combi boilers also utilise gas.</p>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p>Although, if you’ve already decided on what type of boiler you want, the next step in getting it is to find an installer that you can trust. This can be a daunting task that could take days on your own. Luckily, we’re here to help!</p>\n","innerContent":["\n<p>Although, if you’ve already decided on what type of boiler you want, the next step in getting it is to find an installer that you can trust. This can be a daunting task that could take days on your own. Luckily, we’re here to help!</p>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p><em>Our handy service can easily find the installer you need and provide you with up to 3 free, non-binding quotes. All you need to do is click the button below and fill out our 30-second form.</em></p>\n","innerContent":["\n<p><em>Our handy service can easily find the installer you need and provide you with up to 3 free, non-binding quotes. All you need to do is click the button below and fill out our 30-second form.</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":"edit","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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your best deal","subTitle":"Quickly compare 3 FREE quotes","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","uspsImage":{"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","buttonDescription":"It only takes 30 seconds","buttonUrl":"","optimizeText":"Optimise your home and save the planet","optimizeImage":{"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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us to get quotes","bottomSubTitle":"We will get you the best deal","phone":"0330 808 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class=\"wp-block-heading\" id=\"what-size\">What size boiler do I need per boiler type?</h2>\n","innerContent":["\n<h2 class=\"wp-block-heading\" id=\"what-size\">What size boiler do I need per boiler type?</h2>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p>Now let’s discuss which type is most appropriate along with what kilowatt boiler you need for different types of households. It’s important to remember that the tables below provide rough estimates and the needs of your house can vary depending on factors outside of them.</p>\n","innerContent":["\n<p>Now let’s discuss which type is most appropriate along with what kilowatt boiler you need for different types of households. It’s important to remember that the tables below provide rough estimates and the needs of your house can vary depending on factors outside of them.</p>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p>It’s a good rule of thumb to add 1.5kW per radiator that your property has. So, if there are 8 radiators then a 12kW boiler will provide sufficient central heating. Although this isn’t always the case, it’s a handy rule to have.</p>\n","innerContent":["\n<p>It’s a good rule of thumb to add 1.5kW per radiator that your property has. So, if there are 8 radiators then a 12kW boiler will provide sufficient central heating. Although this isn’t always the case, it’s a handy rule to have.</p>\n"]},{"blockName":"core/heading","attrs":{"level":3},"innerBlocks":[],"innerHTML":"\n<h3 class=\"wp-block-heading\">What size combi boiler do I need?</h3>\n","innerContent":["\n<h3 class=\"wp-block-heading\">What size combi boiler do I need?</h3>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p>Combi boilers differ from system and conventional boilers in that they tend to consume more electricity per room but can decrease overall costs as they are more efficient and heat water on demand as opposed to constantly keeping a store of hot water.</p>\n","innerContent":["\n<p>Combi boilers differ from system and conventional boilers in that they tend to consume more electricity per room but can decrease overall costs as they are more efficient and heat water on demand as opposed to constantly keeping a store of hot water.</p>\n"]},{"blockName":"core/table","attrs":[],"innerBlocks":[],"innerHTML":"\n<figure class=\"wp-block-table\"><table><tbody><tr><th>Bedrooms</th><th>Radiators</th><th>Bathrooms</th><th>Boiler size</th></tr><tr><td>1-2</td><td>0 to 10</td><td>1</td><td>18 to 27kW</td></tr><tr><td>3-4</td><td>10 to 15</td><td>2 to 3</td><td>28 to 34kW</td></tr><tr><td>5 or more</td><td>15 to 20</td><td>4 or more</td><td>35 to 43kW</td></tr></tbody></table></figure>\n","innerContent":["\n<figure class=\"wp-block-table\"><table><tbody><tr><th>Bedrooms</th><th>Radiators</th><th>Bathrooms</th><th>Boiler size</th></tr><tr><td>1-2</td><td>0 to 10</td><td>1</td><td>18 to 27kW</td></tr><tr><td>3-4</td><td>10 to 15</td><td>2 to 3</td><td>28 to 34kW</td></tr><tr><td>5 or more</td><td>15 to 20</td><td>4 or more</td><td>35 to 43kW</td></tr></tbody></table></figure>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p>It’s worth noting that we cannot recommend combi boilers for homes that have 3 to 4 bedrooms and multiple bathrooms as they are not meant for these high water-demand environments. In these cases, system and conventional boilers are recommended.</p>\n","innerContent":["\n<p>It’s worth noting that we cannot recommend combi boilers for homes that have 3 to 4 bedrooms and multiple bathrooms as they are not meant for these high water-demand environments. In these cases, system and conventional boilers are recommended.</p>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p>For electric combi boilers, numbers can vary a bit as shown below.</p>\n","innerContent":["\n<p>For electric combi boilers, numbers can vary a bit as shown below.</p>\n"]},{"blockName":"core/table","attrs":[],"innerBlocks":[],"innerHTML":"\n<figure class=\"wp-block-table\"><table><tbody><tr><th>Radiators</th><th>Boiler size</th></tr><tr><td>4</td><td>6kW</td></tr><tr><td>6</td><td>9kW</td></tr><tr><td>8</td><td>12kW</td></tr><tr><td>10</td><td>15 kW</td></tr></tbody></table></figure>\n","innerContent":["\n<figure class=\"wp-block-table\"><table><tbody><tr><th>Radiators</th><th>Boiler size</th></tr><tr><td>4</td><td>6kW</td></tr><tr><td>6</td><td>9kW</td></tr><tr><td>8</td><td>12kW</td></tr><tr><td>10</td><td>15 kW</td></tr></tbody></table></figure>\n"]},{"blockName":"core/heading","attrs":{"level":3},"innerBlocks":[],"innerHTML":"\n<h3 class=\"wp-block-heading\">What size system boiler do I need?</h3>\n","innerContent":["\n<h3 class=\"wp-block-heading\">What size system boiler do I need?</h3>\n"]},{"blockName":"core/table","attrs":[],"innerBlocks":[],"innerHTML":"\n<figure class=\"wp-block-table\"><table><tbody><tr><th>Bedrooms</th><th>Radiators</th><th>Bathrooms</th><th>Boiler size</th></tr><tr><td>1 to 2</td><td>0 to 10</td><td>1</td><td>9 to 18kW</td></tr><tr><td>3 to 4</td><td>10 to 15</td><td>2 to 3</td><td>18 to 26kW</td></tr><tr><td>5 or more</td><td>15 to 20</td><td>4 or more</td><td>27 to 40kW</td></tr></tbody></table></figure>\n","innerContent":["\n<figure class=\"wp-block-table\"><table><tbody><tr><th>Bedrooms</th><th>Radiators</th><th>Bathrooms</th><th>Boiler size</th></tr><tr><td>1 to 2</td><td>0 to 10</td><td>1</td><td>9 to 18kW</td></tr><tr><td>3 to 4</td><td>10 to 15</td><td>2 to 3</td><td>18 to 26kW</td></tr><tr><td>5 or more</td><td>15 to 20</td><td>4 or more</td><td>27 to 40kW</td></tr></tbody></table></figure>\n"]},{"blockName":"core/heading","attrs":{"level":3},"innerBlocks":[],"innerHTML":"\n<h3 class=\"wp-block-heading\">What size conventional boiler do I need?</h3>\n","innerContent":["\n<h3 class=\"wp-block-heading\">What size conventional boiler do I need?</h3>\n"]},{"blockName":"core/table","attrs":[],"innerBlocks":[],"innerHTML":"\n<figure class=\"wp-block-table\"><table><tbody><tr><th>Bedrooms</th><th>Radiators</th><th>Bathrooms</th><th>Boiler size</th></tr><tr><td>1 to 2</td><td>0 to 10&nbsp;</td><td>1</td><td>9 to 18kW</td></tr><tr><td>3 to 4</td><td>10 to 15</td><td>2-3</td><td>18 to 26kW</td></tr><tr><td>5 or more</td><td>15 to 20</td><td>4 or more</td><td>26 to 40kW</td></tr></tbody></table></figure>\n","innerContent":["\n<figure class=\"wp-block-table\"><table><tbody><tr><th>Bedrooms</th><th>Radiators</th><th>Bathrooms</th><th>Boiler size</th></tr><tr><td>1 to 2</td><td>0 to 10&nbsp;</td><td>1</td><td>9 to 18kW</td></tr><tr><td>3 to 4</td><td>10 to 15</td><td>2-3</td><td>18 to 26kW</td></tr><tr><td>5 or more</td><td>15 to 20</td><td>4 or more</td><td>26 to 40kW</td></tr></tbody></table></figure>\n"]},{"blockName":"core/heading","attrs":{"level":3},"innerBlocks":[],"innerHTML":"\n<h3 class=\"wp-block-heading\" id=\"conclusion\">Conclusion: What size boiler do I need for my house?</h3>\n","innerContent":["\n<h3 class=\"wp-block-heading\" id=\"conclusion\">Conclusion: What size boiler do I need for my house?</h3>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p>As stated earlier, to determine how big a boiler you need, you should compare the size of your home, the number of simultaneous running bathrooms and radiators you require, and which type of boiler best suits your needs.</p>\n","innerContent":["\n<p>As stated earlier, to determine how big a boiler you need, you should compare the size of your home, the number of simultaneous running bathrooms and radiators you require, and which type of boiler best suits your needs.</p>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p>If you have a small apartment with 1 or 2 bedrooms, 1 bathroom, and less than 10 radiators, then a small boiler (12 to 18kW for system/conventional and 24 to 27kW for combi) will suffice. Anything over ten radiators and multiple bathrooms can require small to medium-sized boilers (18 to 26kW for system/conventional and 28 to 34kW for combi).</p>\n","innerContent":["\n<p>If you have a small apartment with 1 or 2 bedrooms, 1 bathroom, and less than 10 radiators, then a small boiler (12 to 18kW for system/conventional and 24 to 27kW for combi) will suffice. Anything over ten radiators and multiple bathrooms can require small to medium-sized boilers (18 to 26kW for system/conventional and 28 to 34kW for combi).</p>\n"]},{"blockName":"core/html","attrs":[],"innerBlocks":[],"innerHTML":"\n<div class=\"table-responsive\"><table class=\"no-alteration\" border=\"1\">\n<thead>\n <tr>\n <th colspan=\"3\">Number of rooms and radiators</th>\n <th colspan=\"3\">Boiler size (kW)</th>\n </tr>\n</thead>\n<tbody>\n <tr>\n <td>Bedrooms</td>\n <td>Radiators</td>\n <td>Bathrooms</td>\n <td>Combi</td>\n <td>System</td>\n <td>Conventional</td>\n </tr>\n <tr>\n <td>1-2</td>\n <td>0-10</td>\n <td>1</td>\n <td>18-27kW</td>\n <td>8-18kW</td>\n <td>9-18kW</td>\n </tr>\n <tr>\n <td>3-4</td>\n <td>10-15</td>\n <td>2-3</td>\n <td>28-34kW</td>\n <td>18-26kW</td>\n <td>18-26kW</td>\n </tr>\n <tr>\n <td>5+</td>\n <td>15-20</td>\n <td>4+</td>\n <td>35-43kW</td>\n <td>27-40kW</td>\n <td>26-40kW</td>\n </tr>\n</tbody>\n</table>\n</div>\n","innerContent":["\n<div class=\"table-responsive\"><table class=\"no-alteration\" border=\"1\">\n<thead>\n <tr>\n <th colspan=\"3\">Number of rooms and radiators</th>\n <th colspan=\"3\">Boiler size (kW)</th>\n </tr>\n</thead>\n<tbody>\n <tr>\n <td>Bedrooms</td>\n <td>Radiators</td>\n <td>Bathrooms</td>\n <td>Combi</td>\n <td>System</td>\n <td>Conventional</td>\n </tr>\n <tr>\n <td>1-2</td>\n <td>0-10</td>\n <td>1</td>\n <td>18-27kW</td>\n <td>8-18kW</td>\n <td>9-18kW</td>\n </tr>\n <tr>\n <td>3-4</td>\n <td>10-15</td>\n <td>2-3</td>\n <td>28-34kW</td>\n <td>18-26kW</td>\n <td>18-26kW</td>\n </tr>\n <tr>\n <td>5+</td>\n <td>15-20</td>\n <td>4+</td>\n <td>35-43kW</td>\n <td>27-40kW</td>\n <td>26-40kW</td>\n </tr>\n</tbody>\n</table>\n</div>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p>Houses that are far larger and have multiple bathrooms should swing for 26 to 43kW boilers. Aside from the wattage, it’s also important to make sure that you have space for a conventional or system boiler as they require more components than electric ones.</p>\n","innerContent":["\n<p>Houses that are far larger and have multiple bathrooms should swing for 26 to 43kW boilers. Aside from the wattage, it’s also important to make sure that you have space for a conventional or system boiler as they require more components than electric ones.</p>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p>Here is a handy visual guide to help you decide what’s right for you:</p>\n","innerContent":["\n<p>Here is a handy visual guide to help you decide what’s right for you:</p>\n"]},{"blockName":"core/image","attrs":{"id":75249,"sizeSlug":"full","linkDestination":"none","className":"no-shadow"},"innerBlocks":[],"innerHTML":"\n<figure class=\"wp-block-image size-full no-shadow\"><img src=\"https://cdn.greenmatch.co.uk/cdn-cgi/image/format=auto/2/2023/08/What-size-boiler_Table.png\" alt=\"What size boiler do I need for my home\" class=\"wp-image-75249\" title=\"\" /></figure>\n","innerContent":["\n<figure class=\"wp-block-image size-full no-shadow\"><img src=\"https://cdn.greenmatch.co.uk/cdn-cgi/image/format=auto/2/2023/08/What-size-boiler_Table.png\" alt=\"What size boiler do I need for my home\" class=\"wp-image-75249\" title=\"\" /></figure>\n"]},{"blockName":"core/heading","attrs":[],"innerBlocks":[],"innerHTML":"\n<h2 class=\"wp-block-heading\" id=\"buying-new-boiler\">Interested in buying a new boiler?</h2>\n","innerContent":["\n<h2 class=\"wp-block-heading\" id=\"buying-new-boiler\">Interested in buying a new boiler?</h2>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p>If you’re in the market for a new boiler, you will need an installer that you can trust. One of the best ways to do this is through our handy service. It takes 30 seconds to fill out our forms, removing the need to do days of research and comparing prices. Which would you rather do?</p>\n","innerContent":["\n<p>If you’re in the market for a new boiler, you will need an installer that you can trust. One of the best ways to do this is through our handy service. It takes 30 seconds to fill out our forms, removing the need to do days of research and comparing prices. Which would you rather do?</p>\n"]},{"blockName":"core/paragraph","attrs":[],"innerBlocks":[],"innerHTML":"\n<p><em>Aside from the convenience, we have an extensive list of <strong>trusted installers</strong> that can provide you with their best prices. <strong>Compare up to 3 free, non-binding quotes</strong> and see what suits your needs the best. Click the button below to get started.</em></p>\n","innerContent":["\n<p><em>Aside from the convenience, we have an extensive list of <strong>trusted installers</strong> that can provide you with their best prices. <strong>Compare up to 3 free, non-binding quotes</strong> and see what suits your needs the best. Click the button below to get started.</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":"edit","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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QUOTES NOW","buttonDescription":"It only takes 30 seconds","buttonUrl":"","optimizeText":"Optimise your home and save the planet","optimizeImage":{"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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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>What Size Boiler do I Need</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-0-85" 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: 10 September 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="h1">What Size Boiler Do I Need in the UK? A Complete Guide</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/2/2024/01/Author-Images_Rawal_GM_line.png" alt="Rawal Ahmed " 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>Rawal Ahmed </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>10 September 2024</span></div></div></div></div></section><div class="wordpress-image"> <figure class="wp-block-image size-full no-shadow"><img src="https://cdn.greenmatch.co.uk/cdn-cgi/image/format=auto/2/2023/08/What-size-boiler_Hero.png" alt="What size boiler do I need" class="wp-image-75172" /></figure> </div><div class="wordpress-html"> <ul class="checkmarks-colored"> <li>The right combi boiler size for a 3-4 bedroom house is <strong>28 to 34kW</strong></li> <li>The right system boiler size for a 3-4 bedroom house is <strong>18 to 26kW</strong></li> <li>The right conventional boiler size for a 3-4 bedroom house is <strong>18 to 26kW.</strong></li> </ul> </div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p>When it comes to your heating needs, choosing the right <a href="https://www.greenmatch.co.uk/boilers">boiler</a> can seem difficult. One of the main considerations is getting the right size, both in dimensions and heat output, for your home. If you’re wondering “What size boiler do I need?”, this article will help you determine just that.</p> </div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p>You can also watch the video below for a quick overview of how to calculate the best boiler size for your home:</p> </div><div class="embed-video" data-v-3d984b4d><img class="image" src="https://i.ytimg.com/vi/yPWYXgz4hcA/maxresdefault.jpg" alt="Choosing the Right Size Boiler - How to Calculate?" loading="lazy" data-v-3d984b4d><svg class="icon" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 68 48" data-v-3d984b4d><path class="path1" d="M66.52,7.74c-0.78-2.93-2.49-5.41-5.42-6.19C55.79,.13,34,0,34,0S12.21,.13,6.9,1.55 C3.97,2.33,2.27,4.81,1.48,7.74C0.06,13.05,0,24,0,24s0.06,10.95,1.48,16.26c0.78,2.93,2.49,5.41,5.42,6.19 C12.21,47.87,34,48,34,48s21.79-0.13,27.1-1.55c2.93-0.78,4.64-3.26,5.42-6.19C67.94,34.95,68,24,68,24S67.94,13.05,66.52,7.74z" data-v-3d984b4d></path><path class="path2" d="M 45,24 27,14 27,34" data-v-3d984b4d></path></svg><iframe class="iframe" src="about:blank" title="Choosing the Right Size Boiler - How to Calculate?" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen data-v-3d984b4d></iframe></div><div data-v-3d984b4d><script type="application/ld+json">{"@context":"https://schema.org","@type":"VideoObject","name":"Choosing the Right Size Boiler - How to Calculate?","description":"<p>Size is one of the most important factors when choosing the right boiler for your house – and we don’t mean physical size. In this video we go through why it is important, and how you can calculate an estimate for the ideal size boiler for your home. If you want to get an exact figure, it is always best to contact a professional heating engineer, and we can help you with that! If you fill in our form, we can connect you with up to 3 Gas Safe engineers, who can help you figure out the perfect boiler for you, and give you their offers!</p>\n","duration":"PT3M18S","uploadDate":"2024-02-12T07:15:03Z","embedUrl":"https://www.youtube-nocookie.com/embed/yPWYXgz4hcA?autoplay=1&rel=0","thumbnailUrl":"https://i.ytimg.com/vi/yPWYXgz4hcA/maxresdefault.jpg","transcript":"<p>when choosing a new boiler its size is<br />\none of the most important factors to<br />\nconsider and we’re not talking about the<br />\nphysical size either we’re actually<br />\ntalking about the output size and<br />\ncapacity of the boiler as in how many<br />\nkilowatts of energy it can produce not<br />\nthat physical Size Doesn’t Matter the<br />\noutput size of a boiler is very<br />\nimportant because if its output is too<br />\nsmall your boiler could struggle to<br />\nsufficiently heat your house on the<br />\nother hand a boiler with an output<br />\nthat’s way too big can end up wasting<br />\nenergy and therefore your money too but<br />\nluckily it’s not too hard to work out<br />\nthe appropriate size for your home at<br />\nits simplest the formula to determine<br />\nthis is to allow for 1.5 or 2 KW for<br />\nevery Radiator in your home for example<br />\na home with 10 radiators would need a<br />\nboiler with an output of 15 to 20 Kow<br />\nthis will of course vary a bit depending<br />\non the size of your radiators the type<br />\nof boiler you choose and even based on<br />\nhow well insulated your house is That’s<br />\nwhy you should use the calculation just<br />\nas a general guide if you want to get an<br />\nexact figure it is always best to<br />\ncontact a professional heating engineer<br />\nand that’s something that we can<br />\nactually help with if you fill in our<br />\nform we can connect you with up to three<br />\ngas safe Engineers who can help you<br />\nfigure out the perfect boiler for you<br />\nand give you their offers you can then<br />\ncompare them and pick the one that’s<br />\nbest for you our service is completely<br />\nfree and non-binding just click the link<br />\nin the description to get started now as<br />\nyou’ve maybe not counted the radiators<br />\nin your home recently we’d thought we’d<br />\nlist some common home sizes and the<br />\nboiler output that would be suitable for<br />\nthem the most common boiler type in the<br />\nUK is a Combi boiler and the majority of<br />\nUK homes use boilers with outputs<br />\nbetween 24 and 42 KW a one to<br />\ntwo-bedroom property with up to 10<br />\nradiators and one bathroom will<br />\ngenerally need a Combi boiler with an<br />\noutput size of 18 to 27 KW this goes up<br />\nto around 28 to 34 Kow for a 3 to four<br />\nbedroom property that has up to 15<br />\nradiators and 2 to three bathrooms while<br />\na large five-bedroom home with 15 to 20<br />\nradiators and 3 to four bathrooms will<br />\nrequire a boiler with an output of<br />\nbetween 35 and 43 KW it’s worth noting<br />\nthat we don’t recommend Combi boilers<br />\nfor homes that have three to four<br />\nbedrooms and multiple bathrooms as they<br />\nare usually not capable of meeting the<br />\nhigh hot water Demands a property of<br />\nthat size provides in these cases system<br />\nand conventional boilers are recommended<br />\nagain all of these examples are just<br />\nguidelines and the numbers will change<br />\nbased on which type of boiler you choose<br />\nand how efficient your radiators are so<br />\ndon’t forget that to get quotes from up<br />\nto three local installers that can help<br />\nyou make the right choice all you need<br />\nto do is fill in our form thank you and<br />\nI’ll see you in the next<br />\none</p>\n"}</script></div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p>But first, if you’re already on the hunt for a boiler, you’ll need a professional you can trust. Researching different installers, vet them for trustworthiness, and compare their prices on your own can be laborious. This can end up taking days, but with our handy service, you can easily find a trusted installer with us doing the legwork. </p> </div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p><em>All you have to do is fill out a 30-second form and we will begin providing you with prices from our network of dependable local professionals. Click the button below to <strong>obtain up to 3 free, non-binding quotes</strong> from vetted engineers in your area.</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 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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="#boiler-size" class="table-of-contents__link">Boiler size vs boiler dimensions</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="#why" class="table-of-contents__link">Why is choosing the correct boiler size important?</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-influences" class="table-of-contents__link">What influences which boiler size is the best for your UK household?</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-size" class="table-of-contents__link">What size boiler do I need per boiler type?</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="#buying-new-boiler" class="table-of-contents__link">Interested in buying a new 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 class="wordpress-heading u-heading-2 wordpress-heading--h2" style="--c37e9152:left;" data-v-beed8f72> <h2 class="wp-block-heading" id="boiler-size">Boiler size vs boiler dimensions</h2> </div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p>When it comes to boiler size, we aren’t always talking about the physical space it takes. More often, size is about efficiency, power input, and heat output. When thinking about size, you should ask “What kW boiler do I need” rather than how much space it takes.</p> </div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p>While dimensions can be important for planning the physical space in your house, boiler size is crucial in determining whether your boiler is up to the task. Boiler size can determine whether the heating system can manage to heat your home and should be considered alongside how efficiently it operates. Generally, the larger your home the larger the boiler you will need.</p> </div><div class="wordpress-heading u-heading-2 wordpress-heading--h2" style="--c37e9152:left;" data-v-beed8f72> <h2 class="wp-block-heading" id="why">Why is choosing the right boiler size important?</h2> </div><div class="wordpress-image"> <figure class="wp-block-image size-full no-shadow"><img src="https://cdn.greenmatch.co.uk/cdn-cgi/image/format=auto/2/2023/08/What-size-boiler_Pros.png" alt="Why choosing the right boiler size is important" class="wp-image-75230" /></figure> </div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p>The correct boiler size can have an impact on your electricity and/or gas bills, so it’s important to focus on power and efficiency. If a boiler is too big for your home, you may end up spending unnecessary money on it. If it’s too small, you may not be able to adequately heat all the areas of your house. This is why finding the right balance is important.</p> </div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p>Most modern boilers can adjust their energy usage to the amount you need, except conventional or heat-only boilers, which can waste energy and produce excess heat that will increase your energy bills. They may also consume extra fuel and use up more energy than you need.</p> </div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p>Aside from efficiency and heating, changing the size of your boiler can have advantages for your house. If your home has a conventional boiler but does not need the heating output it provides (possibly because it’s a smaller home), you can free up a lot of space by getting a combi boiler. </p> </div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p>A <a href="https://www.greenmatch.co.uk/blog/boiler-replacement">boiler replacement</a> that adds more modern heating can also allow you to improve the energy efficiency of your home, adding value to the house and decreasing your carbon footprint to better match lower energy and/or gas consumption.</p> </div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p>On the other hand, a more powerful boiler can benefit large properties by ensuring stable water pressure. Combi boilers are best for one-shower households but system and conventional boilers can operate multiple hot taps and showers simultaneously. However, this also means that higher power systems incur higher <a href="https://www.greenmatch.co.uk/blog/2018/08/new-boiler-cost">boiler costs</a>, so choose wisely.</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-influences">What influences what boiler size is best for your UK household?</h2> </div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p>Let’s go over the 2 most important factors to consider when selecting the boiler size you need. These are the energy needs of your home and the type of boiler you want to purchase.</p> </div><div class="wordpress-heading u-heading-3 wordpress-heading--h3" style="--c37e9152:left;" data-v-beed8f72> <h3 class="wp-block-heading">Size of your house and amount of radiators</h3> </div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p>The size of your house and its energy requirements decide what kW boiler you need to heat your home properly. To accurately gauge the size of your house and what boiler size will be best suited for it, you need to consider:</p> </div><div class="wordpress-list" style="--59fc38e0:;" data-v-9bc93961><ul class="wordpress-list__wrapper" data-v-9bc93961> <li>Number of bedrooms</li> <li>Number of radiators</li> <li>Number of bathrooms</li> <li>How well-insulated your home is</li> </ul></div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p>The number of radiators, bedrooms, and bathrooms each constitutes a heating or water usage source, which requires more power from a boiler.</p> </div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p>Homes with adequate insulation tend to preserve heat better and thus require less work from the boiler. Older houses may need a more powerful boiler for this same reason.</p> </div><div class="wordpress-heading u-heading-3 wordpress-heading--h3" style="--c37e9152:left;" data-v-beed8f72> <h3 class="wp-block-heading" id="boiler-types">Which boiler do I need? Boiler types and size differences</h3> </div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p>Considering how they work, there are 3 main types of boilers:</p> </div><div class="wordpress-list" style="--59fc38e0:;" data-v-9bc93961><ul class="wordpress-list__wrapper" data-v-9bc93961> <li><a href="https://www.greenmatch.co.uk/boilers/combi-boilers">Combi boilers</a> </li> <li><a href="https://www.greenmatch.co.uk/boilers/system">System boilers</a></li> <li><a href="https://www.greenmatch.co.uk/boilers/conventional">Conventional boilers</a> or regular boilers</li> </ul></div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p>Boilers can also be categorised in terms of the fuel they use:</p> </div><div class="wordpress-list" style="--59fc38e0:;" data-v-9bc93961><ul class="wordpress-list__wrapper" data-v-9bc93961> <li>Gas boilers (with combi gas boilers being the most popular ones in the UK)</li> <li>Electric boilers</li> <li>Oil boilers</li> <li>Biomass boilers</li> </ul></div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p>If you require running more than one bath simultaneously, it’s best to eschew combi boilers for systems or conventional ones. Similarly, the number of bedrooms and the heat output you expect from the radiators may influence whether you need conventional and system boilers, which can handle higher loads. </p> </div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p>While gas boilers can also have a high-power output, they are only applicable if your home already has a gas main. Similarly, conventional boilers require an attic space or an airing cupboard since they come with extra parts. System boilers also require a cylinder which can take up space, so be sure to choose the right boiler based on the specifications of your home.</p> </div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p>Alternatively, if you have a small home and would prefer a more efficient system, gas or <a href="https://www.greenmatch.co.uk/boilers/electric/combi">electric combi boilers</a> can both be great. They can have an efficiency rating of up to 98%, making them ideal for smaller homes. These boilers can also save physical space as they have smaller overall dimensions (due to the lack of external parts like water tanks and cylinders).</p> </div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p>The main difference between the two is that electric combi boilers purely rely on electricity while traditional combi boilers also utilise gas.</p> </div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p>Although, if you’ve already decided on what type of boiler you want, the next step in getting it is to find an installer that you can trust. This can be a daunting task that could take days on your own. Luckily, we’re here to help!</p> </div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p><em>Our handy service can easily find the installer you need and provide you with up to 3 free, non-binding quotes. All you need to do is click the button below and fill out our 30-second form.</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 class="wordpress-heading u-heading-2 wordpress-heading--h2" style="--c37e9152:left;" data-v-beed8f72> <h2 class="wp-block-heading" id="what-size">What size boiler do I need per boiler type?</h2> </div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p>Now let’s discuss which type is most appropriate along with what kilowatt boiler you need for different types of households. It’s important to remember that the tables below provide rough estimates and the needs of your house can vary depending on factors outside of them.</p> </div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p>It’s a good rule of thumb to add 1.5kW per radiator that your property has. So, if there are 8 radiators then a 12kW boiler will provide sufficient central heating. Although this isn’t always the case, it’s a handy rule to have.</p> </div><div class="wordpress-heading u-heading-3 wordpress-heading--h3" style="--c37e9152:left;" data-v-beed8f72> <h3 class="wp-block-heading">What size combi boiler do I need?</h3> </div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p>Combi boilers differ from system and conventional boilers in that they tend to consume more electricity per room but can decrease overall costs as they are more efficient and heat water on demand as opposed to constantly keeping a store of hot water.</p> </div><div class="wordpress-table"> <figure class="wp-block-table"><table><tbody><tr><th>Bedrooms</th><th>Radiators</th><th>Bathrooms</th><th>Boiler size</th></tr><tr><td>1-2</td><td>0 to 10</td><td>1</td><td>18 to 27kW</td></tr><tr><td>3-4</td><td>10 to 15</td><td>2 to 3</td><td>28 to 34kW</td></tr><tr><td>5 or more</td><td>15 to 20</td><td>4 or more</td><td>35 to 43kW</td></tr></tbody></table></figure> </div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p>It’s worth noting that we cannot recommend combi boilers for homes that have 3 to 4 bedrooms and multiple bathrooms as they are not meant for these high water-demand environments. In these cases, system and conventional boilers are recommended.</p> </div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p>For electric combi boilers, numbers can vary a bit as shown below.</p> </div><div class="wordpress-table"> <figure class="wp-block-table"><table><tbody><tr><th>Radiators</th><th>Boiler size</th></tr><tr><td>4</td><td>6kW</td></tr><tr><td>6</td><td>9kW</td></tr><tr><td>8</td><td>12kW</td></tr><tr><td>10</td><td>15 kW</td></tr></tbody></table></figure> </div><div class="wordpress-heading u-heading-3 wordpress-heading--h3" style="--c37e9152:left;" data-v-beed8f72> <h3 class="wp-block-heading">What size system boiler do I need?</h3> </div><div class="wordpress-table"> <figure class="wp-block-table"><table><tbody><tr><th>Bedrooms</th><th>Radiators</th><th>Bathrooms</th><th>Boiler size</th></tr><tr><td>1 to 2</td><td>0 to 10</td><td>1</td><td>9 to 18kW</td></tr><tr><td>3 to 4</td><td>10 to 15</td><td>2 to 3</td><td>18 to 26kW</td></tr><tr><td>5 or more</td><td>15 to 20</td><td>4 or more</td><td>27 to 40kW</td></tr></tbody></table></figure> </div><div class="wordpress-heading u-heading-3 wordpress-heading--h3" style="--c37e9152:left;" data-v-beed8f72> <h3 class="wp-block-heading">What size conventional boiler do I need?</h3> </div><div class="wordpress-table"> <figure class="wp-block-table"><table><tbody><tr><th>Bedrooms</th><th>Radiators</th><th>Bathrooms</th><th>Boiler size</th></tr><tr><td>1 to 2</td><td>0 to 10 </td><td>1</td><td>9 to 18kW</td></tr><tr><td>3 to 4</td><td>10 to 15</td><td>2-3</td><td>18 to 26kW</td></tr><tr><td>5 or more</td><td>15 to 20</td><td>4 or more</td><td>26 to 40kW</td></tr></tbody></table></figure> </div><div class="wordpress-heading u-heading-3 wordpress-heading--h3" style="--c37e9152:left;" data-v-beed8f72> <h3 class="wp-block-heading" id="conclusion">Conclusion: What size boiler do I need for my house?</h3> </div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p>As stated earlier, to determine how big a boiler you need, you should compare the size of your home, the number of simultaneous running bathrooms and radiators you require, and which type of boiler best suits your needs.</p> </div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p>If you have a small apartment with 1 or 2 bedrooms, 1 bathroom, and less than 10 radiators, then a small boiler (12 to 18kW for system/conventional and 24 to 27kW for combi) will suffice. Anything over ten radiators and multiple bathrooms can require small to medium-sized boilers (18 to 26kW for system/conventional and 28 to 34kW for combi).</p> </div><div class="wordpress-html"> <div class="table-responsive"><table class="no-alteration" border="1"> <thead> <tr> <th colspan="3">Number of rooms and radiators</th> <th colspan="3">Boiler size (kW)</th> </tr> </thead> <tbody> <tr> <td>Bedrooms</td> <td>Radiators</td> <td>Bathrooms</td> <td>Combi</td> <td>System</td> <td>Conventional</td> </tr> <tr> <td>1-2</td> <td>0-10</td> <td>1</td> <td>18-27kW</td> <td>8-18kW</td> <td>9-18kW</td> </tr> <tr> <td>3-4</td> <td>10-15</td> <td>2-3</td> <td>28-34kW</td> <td>18-26kW</td> <td>18-26kW</td> </tr> <tr> <td>5+</td> <td>15-20</td> <td>4+</td> <td>35-43kW</td> <td>27-40kW</td> <td>26-40kW</td> </tr> </tbody> </table> </div> </div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p>Houses that are far larger and have multiple bathrooms should swing for 26 to 43kW boilers. Aside from the wattage, it’s also important to make sure that you have space for a conventional or system boiler as they require more components than electric ones.</p> </div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p>Here is a handy visual guide to help you decide what’s right for you:</p> </div><div class="wordpress-image"> <figure class="wp-block-image size-full no-shadow"><img src="https://cdn.greenmatch.co.uk/cdn-cgi/image/format=auto/2/2023/08/What-size-boiler_Table.png" alt="What size boiler do I need for my home" class="wp-image-75249" title="" /></figure> </div><div class="wordpress-heading u-heading-2 wordpress-heading--h2" style="--c37e9152:left;" data-v-beed8f72> <h2 class="wp-block-heading" id="buying-new-boiler">Interested in buying a new boiler?</h2> </div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p>If you’re in the market for a new boiler, you will need an installer that you can trust. One of the best ways to do this is through our handy service. It takes 30 seconds to fill out our forms, removing the need to do days of research and comparing prices. Which would you rather do?</p> </div><div class="wordpress-paragraph" style="--25ab227a:left;" data-v-c0f9f52b> <p><em>Aside from the convenience, we have an extensive list of <strong>trusted installers</strong> that can provide you with their best prices. <strong>Compare up to 3 free, non-binding quotes</strong> and see what suits your needs the best. Click the button below to get started.</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 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-0-90" 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>How do I calculate the size of the boiler needed for my home?</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-0-91" 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 need to compare the number of rooms in your house, the number of radiators, and the number of bathrooms. Small apartments with 1 or 2 bedrooms, 1 bathroom, and less than 10 radiators can make do with a small boiler, for example. We have a <a href="#conclusion">handy chart that can help you with more specific sizes</a>.</p> </div></div><div data-headlessui-state class="faq" data-v-86ecb72c><button id="headlessui-disclosure-button-v-0-92" 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 size system boiler do I need for my house?</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-0-93" hidden style="display:none;" data-headlessui-state class="faq__panel faq__panel--has-color faq__panel-text-parent--has-color" data-v-86ecb72c><p>For a one to two-bedroom apartment, a 9 to 18kW system boiler can be sufficient. For larger houses, you can check <a href="#what-size">our table breaking down the sizes of boilers for various homes</a>.</p> </div></div><div data-headlessui-state class="faq" data-v-86ecb72c><button id="headlessui-disclosure-button-v-0-94" 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 size boiler do I need for 13 radiators?</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-0-95" hidden style="display:none;" data-headlessui-state class="faq__panel faq__panel--has-color faq__panel-text-parent--has-color" data-v-86ecb72c><p>13 radiators can require anywhere from 18 to 34kW sized boilers. On average 13 radiators will need 19.5kW power. This mostly depends on the <a href="#boiler-types">type of boiler you choose (electric, conventional, or system)</a>.</p> </div></div><div data-headlessui-state class="faq" data-v-86ecb72c><button id="headlessui-disclosure-button-v-0-96" 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 happens if you oversize a 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-0-97" hidden style="display:none;" data-headlessui-state class="faq__panel faq__panel--has-color faq__panel-text-parent--has-color" data-v-86ecb72c><p>If you oversize a boiler you can waste energy, increase your bills, and cause unnecessary waste that damages the environment. There are <a href="#why">multiple reasons you should choose the right boiler size</a>.</p> </div></div><div style="" data-v-86ecb72c><script type="application/ld+json">{"@context":"https://schema.org","@type":"FAQPage","mainEntity":[{"@type":"Question","name":"How do I calculate the size of the boiler needed for my home?","acceptedAnswer":{"@type":"Answer","text":"You need to compare the number of rooms in your house, the number of radiators, and the number of bathrooms. Small apartments with 1 or 2 bedrooms, 1 bathroom, and less than 10 radiators can make do with a small boiler, for example. We have a handy chart that can help you with more specific sizes.\n"}},{"@type":"Question","name":"What size system boiler do I need for my house?","acceptedAnswer":{"@type":"Answer","text":"For a one to two-bedroom apartment, a 9 to 18kW system boiler can be sufficient. For larger houses, you can check our table breaking down the sizes of boilers for various homes.\n"}},{"@type":"Question","name":"What size boiler do I need for 13 radiators?","acceptedAnswer":{"@type":"Answer","text":"13 radiators can require anywhere from 18 to 34kW sized boilers. On average 13 radiators will need 19.5kW power. This mostly depends on the type of boiler you choose (electric, conventional, or system).\n"}},{"@type":"Question","name":"What happens if you oversize a boiler?","acceptedAnswer":{"@type":"Answer","text":"If you oversize a boiler you can waste energy, increase your bills, and cause unnecessary waste that damages the environment. There are multiple reasons you should choose the right boiler size.\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/2/2024/01/Author-Images_Rawal_GM_line.png" alt="Rawal Ahmed " 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#bbc995dad3d6dedffbd7dedadfc895d2d4" 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/rawal-ahmed" data-v-07f80019>Rawal Ahmed </a><span data-v-07f80019>, Writer</span></div></div><div class="content-author__content--shortbio" data-v-07f80019><p>Rawal Ahmed is a writer at GreenMatch with an interest in sustainability and a background in tech journalism and digital marketing.</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/biomass/cost" 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/biomass-boiler-costs-and-savings.png" alt="How Much Does a Biomass Boiler Cost?" class="related-articles__article-image" loading="lazy" data-v-2534d049></div><div class="related-articles__article-title" data-v-2534d049>How Much Does a 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src="https://cdn.greenmatch.co.uk/cdn-cgi/image/w=152,h=152,fit=cover,f=auto/2/2022/10/boiler-replacement-allowance.jpg" alt="All You Need to Know About The Boiler Replacement Allowance" class="related-articles__article-image" loading="lazy" data-v-2534d049></div><div class="related-articles__article-title" data-v-2534d049>All You Need to Know About The Boiler Replacement Allowance</div></a></div><div class="related-articles__article" data-v-2534d049><a class="related-articles__article-inner" href="https://www.greenmatch.co.uk/blog/2015/06/do-solar-thermal-panels-work-with-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/solar-thermal-combi-boilers.jpg" alt="Do Solar Thermal Panels Work with Combi Boilers?" class="related-articles__article-image" loading="lazy" data-v-2534d049></div><div class="related-articles__article-title" data-v-2534d049>Do Solar Thermal Panels Work with Combi Boilers?</div></a></div></div></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 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