{"id":23603,"date":"2025-03-05T10:13:03","date_gmt":"2025-03-05T10:13:03","guid":{"rendered":"https:\/\/www.granddesignsmagazine.com\/?p=23603"},"modified":"2025-03-05T21:59:56","modified_gmt":"2025-03-05T21:59:56","slug":"my-heat-pump-journey-series-part-two","status":"publish","type":"post","link":"https:\/\/www.granddesignsmagazine.com\/heating\/my-heat-pump-journey-series-part-two\/","title":{"rendered":"My heat pump journey part two: making a plan"},"content":{"rendered":"<p>In <a href=\"https:\/\/www.granddesignsmagazine.com\/heating\/my-heat-pump-journey-series-part-one\/\" target=\"_blank\" rel=\"noopener\">part one<\/a> of this series, I looked at preparation. How to make your home ready for a heat pump. I did this by insulating my 1930s terrace on all sides. I insulated walls, floors, roof, so much that it went up from an EPC D rating to a C.<\/p>\n<p>This second article is about how to pick a heat pump supplier, get a survey done &#8211; and figure out if it\u2019s even doable.<\/p>\n<h2>A huge \u00a37,500 discount<\/h2>\n<p>If you\u2019re replacing a gas boiler (or other fossil fuel-based heating system) in England you should be eligible for the <a href=\"https:\/\/www.gov.uk\/apply-boiler-upgrade-scheme\" target=\"_blank\" rel=\"noopener\">Boiler Upgrade Scheme (BUS)<\/a>. This knocks \u00a37,500 off your installation bill.<\/p><div class=\"gdmag-content\" id=\"gdmag-156115402\" data-cfpa=\"20295\" data-cfpw=\"20295\"><div class=\"gdmag-adlabel\">Advertisements<\/div><div class=\"GRVMpuWrapper mobile\"><div class=\"GRVAd inline mobile\" data-ad-type=\"primary-mpu\" data-ad-label=\"mpu\" data-ad-sizemapping=\"primary-mpu\" data-ad-sizes=\"[[300,250],[300,600],[320,480]]\" data-ad-refreshmapping=\"always\"><\/div><\/div><\/div><script type=\"text\/javascript\">;new advadsCfpAd( 20295 );<\/script>\n<p>For me, this brought the cost of a heat pump down so much that it was similar to the cost of a replacement boiler. But you must use an <a href=\"https:\/\/www.gov.uk\/guidance\/find-a-heat-pump-installer\" target=\"_blank\" rel=\"noopener\">MCS certified installer<\/a> who is registered for the BUS to get the funding.<\/p>\n<p>This also means you know you\u2019re getting someone who\u2019s competent and that the products meet standards.<\/p>\n<p>The discount comes off the bill. So you don\u2019t have to pay the full amount and claim the money back. But you will need to sign some forms to say that the work has been done and the discount has been applied.<\/p>\n<h2>Picking a supplier<\/h2>\n<p>I started researching heat pumps. Soon after, my social media was full of ads from energy companies and heat pump makers.<\/p><div class=\"gdmag-content-2\" id=\"gdmag-1807669173\" data-cfpa=\"19928\" data-cfpw=\"19928\"><div class=\"gdmag-adlabel\">Advertisements<\/div><!-- code from Primis - granddesignsmagazine.com -->\r\n<script type=\"text\/javascript\" language=\"javascript\" src=\"https:\/\/live.primis.tech\/live\/liveView.php?s=116493&schain=1.0,1!grv.media,65,1\"><\/script>\r\n<!-- code from Primis --><\/div><script type=\"text\/javascript\">;new advadsCfpAd( 19928 );<\/script>\n<p>I didn\u2019t want to use a little company that I\u2019d never heard of to install it. I decided it was best to pick a well-respected supplier rather than fixate on a specific make and model of heat pump.<\/p>\n<p>The supplier visits and does a thorough survey. It\u2019s only after this that you\u2019ll start talking about makes and models.<\/p>\n<p>I found several certified installers near me, but settled on energy company <a href=\"https:\/\/octopus.energy\/\" target=\"_blank\" rel=\"noopener\">Octopus Energy<\/a> in the end. The company is known for its flexible tariffs and eco options.<\/p>\n<p>Octopus Energy has committed to heat pumps in a big way, so there\u2019s also an economy of scale that drives prices down.<\/p>\n<p>You don\u2019t have to change electricity supplier but I chose to, to take advantage of its heat pump friendly <a href=\"https:\/\/octopus.energy\/smart\/cosy-octopus\/\" target=\"_blank\" rel=\"noopener\">Cosy Octopus tariff<\/a>.<\/p><div class=\"gdmag-prop-primary-mpu\" id=\"gdmag-4031711228\" data-cfpa=\"20294\" data-cfpw=\"20294\"><div class=\"gdmag-adlabel\">Advertisements<\/div><div class=\"GRVMpuWrapper\"><div class=\"GRVAd inline\" data-ad-type=\"mpu\" data-ad-sizes=\"[[300,250]]\" data-ad-refreshmapping=\"always\"><\/div><\/div><\/div><script type=\"text\/javascript\">;new advadsCfpAd( 20294 );<\/script>\n<p>You start by filling in an <a href=\"https:\/\/octopus.energy\/order\/heat-pump\/\" target=\"_blank\" rel=\"noopener\">online survey<\/a> to get a quote, pay a refundable \u00a3200 deposit and request a home survey.<\/p>\n<h2>The survey<\/h2>\n<p>On the survey day, <a href=\"https:\/\/octopus.energy\/\" target=\"_blank\" rel=\"noopener\">Octopus Energy<\/a> sent two people over.<\/p>\n<p>One was armed with an app and tape measure to survey the house and measured every wall and window, even the radiators &#8211; \u00a0they were on a mission to find out how much heat the house needed and how much heat the radiators would put out.<\/p>\n<p>The other was a heating engineer &#8211; looking at where to position the heat pump and how to fit it to my system.<\/p><div class=\"gdmag-prop-in-content-mpu\" id=\"gdmag-2709743834\" data-cfpa=\"20294\" data-cfpw=\"20294\"><div class=\"gdmag-adlabel\">Advertisements<\/div><div class=\"GRVMpuWrapper\"><div class=\"GRVAd inline\" data-ad-type=\"mpu\" data-ad-sizes=\"[[300,250]]\" data-ad-refreshmapping=\"always\"><\/div><\/div><\/div><script type=\"text\/javascript\">;new advadsCfpAd( 20294 );<\/script>\n<p>An air source heat pump needs a unit outdoors to gather heat energy from the air (it looks like air conditioning unit) and a large water storage cylinder indoors.<\/p>\n<p>My house was well insulated but finding space for the indoor equipment was a challenge. Like many people, I had a combi boiler and no cylinder\u2026 and no room for one.<\/p>\n<div id=\"attachment_23606\" style=\"width: 710px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-23606\" class=\"wp-image-23606 size-large\" style=\"font-size: 16px;\" src=\"https:\/\/www.granddesignsmagazine.com\/wp-content\/uploads\/2025\/02\/comped-700x614.jpg\" alt=\"One surveyor takes a photo of a cupboard with a boiler and washing machine in, the other measures the thickness of a loft roof\" width=\"700\" height=\"614\" srcset=\"https:\/\/www.granddesignsmagazine.com\/wp-content\/uploads\/2025\/02\/comped-700x614.jpg 700w, https:\/\/www.granddesignsmagazine.com\/wp-content\/uploads\/2025\/02\/comped-250x219.jpg 250w, https:\/\/www.granddesignsmagazine.com\/wp-content\/uploads\/2025\/02\/comped-768x673.jpg 768w, https:\/\/www.granddesignsmagazine.com\/wp-content\/uploads\/2025\/02\/comped-1536x1347.jpg 1536w, https:\/\/www.granddesignsmagazine.com\/wp-content\/uploads\/2025\/02\/comped-2048x1796.jpg 2048w, https:\/\/www.granddesignsmagazine.com\/wp-content\/uploads\/2025\/02\/comped-120x105.jpg 120w, https:\/\/www.granddesignsmagazine.com\/wp-content\/uploads\/2025\/02\/comped-1200x1052.jpg 1200w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><p id=\"caption-attachment-23606\" class=\"wp-caption-text\">One surveyor focussed on how, and where, to install the heat pump. The other measured everything.<\/p><\/div>\n<h2>No space for a cylinder<\/h2>\n<p>When we extended the house and built the kitchen in 2017, it didn\u2019t occur to me that I\u2019d ever need space for a cylinder.<\/p>\n<p>In fact, the bespoke kitchen was built around the aging combi boiler; I just assumed that I\u2019d find a new one of a similar size &#8211; I didn\u2019t think about heat pumps.<\/p><div class=\"gdmag-prop-in-content-mpu-2\" id=\"gdmag-1275730105\" data-cfpa=\"20294\" data-cfpw=\"20294\"><div class=\"gdmag-adlabel\">Advertisements<\/div><div class=\"GRVMpuWrapper\"><div class=\"GRVAd inline\" data-ad-type=\"mpu\" data-ad-sizes=\"[[300,250]]\" data-ad-refreshmapping=\"always\"><\/div><\/div><\/div><script type=\"text\/javascript\">;new advadsCfpAd( 20294 );<\/script>\n<h2>The outdoor unit<\/h2>\n<p>The easy part was agreeing where the outdoor unit should sit.<\/p>\n<p>My house is end of terrace, so it has a side passage. This made it possible to have a back-to-back installation, with the outdoor unit in the side passage just the other side of the wall from the old boiler.<\/p>\n<p>Planning permission wasn\u2019t needed &#8211; the rules are that it must be at least 1m from your neighbour\u2019s boundary (which it was) and not loud near any windows (theirs or yours).<\/p>\n<p>Of course, it\u2019s different for listed buildings and conservation areas.<\/p>\n<p>Mine didn\u2019t need planning permission but I discussed it with my neighbour all the same and she was supportive.<\/p><div class=\"gdmag-prop-in-content-mpu-3\" id=\"gdmag-3602047877\" data-cfpa=\"20294\" data-cfpw=\"20294\"><div class=\"gdmag-adlabel\">Advertisements<\/div><div class=\"GRVMpuWrapper\"><div class=\"GRVAd inline\" data-ad-type=\"mpu\" data-ad-sizes=\"[[300,250]]\" data-ad-refreshmapping=\"always\"><\/div><\/div><\/div><script type=\"text\/javascript\">;new advadsCfpAd( 20294 );<\/script>\n<h2>The indoor unit<\/h2>\n<p>Inside was so much tougher.<\/p>\n<p>The <a href=\"http:\/\/jonathanmaker.com\/\" target=\"_blank\" rel=\"noopener\">Jonathan Maker<\/a> kitchen, built bespoke in 2017, fitted everything in perfectly. There was no spare room &#8211; so I had to sacrifice something.<\/p>\n<p>I considered various places around the house and decided that the heat pump belonged where the combi boiler was being removed, for a back-to-back installation.<\/p>\n<p>This would mean losing a cupboard\u2019s worth of space, including my tumble dryer.<\/p>\n<p>The space was still extremely tight: taller but narrower than most heat pump cupboards.<\/p>\n<p>The surveyor put a lot of thought into it and concluded that it was possible, literally at a squeeze.<\/p><div class=\"gdmag-prop-in-content-mpu-4\" id=\"gdmag-2877605570\" data-cfpa=\"20294\" data-cfpw=\"20294\"><div class=\"gdmag-adlabel\">Advertisements<\/div><div class=\"GRVMpuWrapper\"><div class=\"GRVAd inline\" data-ad-type=\"mpu\" data-ad-sizes=\"[[300,250]]\" data-ad-refreshmapping=\"always\"><\/div><\/div><\/div><script type=\"text\/javascript\">;new advadsCfpAd( 20294 );<\/script>\n<p>I then emptied another kitchen cupboard and moved the tumble dryer into it &#8211; losing \u00a0storage space but no appliances.<\/p>\n<h2>Other changes<\/h2>\n<p>Meanwhile the other surveyor was visiting every room, measuring the walls, windows and radiators, and asking me questions.<\/p>\n<p>All the data gets entered into an app and then the results tell you what modifications your heating system needs.<\/p>\n<p>This bit was amusing. Both surveyors saw my 1930s house and imagined that I\u2019d need to replace a lot of radiators.<\/p>\n<p>But I\u2019d done such a good job of insulating the house than only two radiators needed replacing. This was a pleasant surprise.<\/p>\n<p>Radiators get replaced in order to put out more heat so you might get a larger radiator or one that discreetly has more panels.<\/p>\n<p>This is because heat pumps circulate water at a lower temperature than gas boilers (around 45-50\u00b0C rather than 65-70\u00b0C), so you sometimes need larger radiators in order to put out enough heat.<\/p>\n<p>The surveyors from <a href=\"https:\/\/octopus.energy\/\" target=\"_blank\" rel=\"noopener\">Octopus Energy<\/a> were stunned by the results &#8211; they even double-checked them because my house doesn\u2019t look like an eco-home.<\/p>\n<p>It was really good news, my preparation had paid off and I was quoted just \u00a32,400 for the installation, which covered everything, including the radiator changes.<\/p>\n<p>The total came to \u00a39,900 but with \u00a37,500 deducted, thanks to the Boiler Upgrade Scheme.<\/p>\n<p>At \u00a32,400, the cost was equivalent to a new boiler and, seeing as my old combi was broken, it was a no-brainer.<\/p>\n<p>I\u2019d lose some cupboard space but I\u2019d finally be able to get off fossil fuels and hopefully save on energy bills.<\/p>\n<p>The alternative, a new boiler, would be easier but would commit me to another decade of fossil fuels and reliance on gas prices &#8211; instead, this was a good plan in terms of cash and the climate.<\/p>\n<h2>Will a heat pump work in your home?<\/h2>\n<p>If you have the space indoors and out, I feel a heat pump can work in any home.<\/p>\n<p>The caveat is that you might have to throw cash at it. My 1930s house was really well insulated \u2013 as documented in <a href=\"https:\/\/www.granddesignsmagazine.com\/heating\/my-heat-pump-journey-series-part-one\/\">part one<\/a> of this series \u2013 but many aren\u2019t.<\/p>\n<p>Either spend money on insulation, so less heat is lost, or spend money on radiators, to put more heat out.<\/p>\n<p>Modern homes are better insulated so tend to be better candidates.<\/p>\n<p>Though if you\u2019re unlucky enough to have \u2018microbore\u2019 narrow central heating pipes that were popular in the 1970s and 1980s, you\u2019ll likely need new pipework.<\/p>\n<h2>Next steps<\/h2>\n<p>The <a href=\"https:\/\/octopus.energy\/\" target=\"_blank\" rel=\"noopener\">Octopus Energy<\/a> surveyors left me with a plan, costed out, that detailed the heat pump equipment and performance. I just had to read, sign it and book a date.<\/p>\n<p>Considering my old combi boiler had died, so we had no heating and no hot water, I couldn\u2019t wait.<\/p>\n<p>I had to empty the double cupboard and <a href=\"http:\/\/jonathanmaker.com\/\" target=\"_blank\" rel=\"noopener\">Jonathan Maker<\/a> removed the bespoke cabinetry, promising to return and redo it once the heat pump was in place.<\/p>\n<p>I was nearly there. In the third article in this series, I\u2019ll talk about the installation day itself. We were finally getting a heat pump\u2026 or were we?<\/p>\n<p>Meanwhile, if you\u2019re interested in heat pumps, take a look at this <a href=\"https:\/\/www.granddesignsmagazine.com\/heating\/heat-pumps-do-work-consider-installing\/\">heat pump explainer<\/a>, this overview of <a href=\"https:\/\/www.granddesignsmagazine.com\/heating\/air-source-heat-pump-cost\/\">heat pump installation costs<\/a> and this article on <a href=\"https:\/\/www.granddesignsmagazine.com\/heating\/how-much-does-a-heat-pump-cost-to-run\/\">heat pump running costs<\/a>.<\/p>\n<p><!--more--><\/p>\n","protected":false},"excerpt":{"rendered":"In part one of this series, I looked at preparation. How to make your home ready for a heat pump. I did this by insulating my 1930s terrace on all sides. I insulated walls, floors, roof, so much that it went up from an EPC D rating to a C. This second article is about&#8230; <a class=\"view-article\" href=\"https:\/\/www.granddesignsmagazine.com\/heating\/my-heat-pump-journey-series-part-two\/\">View Article<\/a>","protected":false},"author":12063,"featured_media":23604,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[518,584],"tags":[],"class_list":["post-23603","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-heating","category-sustainable-design"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.3 (Yoast SEO v26.6) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>My heat pump journey part two: making a plan - Grand Designs Magazine<\/title>\n<meta name=\"description\" content=\"If you want replace your gas boiler with an air source heat pump, read on to find out how to get a survey and make a plan\u2026\" \/>\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.granddesignsmagazine.com\/heating\/my-heat-pump-journey-series-part-two\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"My heat pump journey part two: making a plan\" \/>\n<meta property=\"og:description\" content=\"If you want replace your gas boiler with an air source heat pump, read on to find out how to get a survey and make a plan\u2026\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.granddesignsmagazine.com\/heating\/my-heat-pump-journey-series-part-two\/\" \/>\n<meta property=\"og:site_name\" content=\"Grand Designs Magazine\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/GrandDesigns\" \/>\n<meta property=\"article:published_time\" content=\"2025-03-05T10:13:03+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-03-05T21:59:56+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.granddesignsmagazine.com\/wp-content\/uploads\/2025\/02\/lead-3-scaled.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"2560\" \/>\n\t<meta property=\"og:image:height\" content=\"1440\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Caramel Quin\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@granddesigns\" \/>\n<meta name=\"twitter:site\" content=\"@granddesigns\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Caramel Quin\" \/>\n\t<meta name=\"twitter:label2\" content=\"Estimated reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"7 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.granddesignsmagazine.com\/heating\/my-heat-pump-journey-series-part-two\/\",\"url\":\"https:\/\/www.granddesignsmagazine.com\/heating\/my-heat-pump-journey-series-part-two\/\",\"name\":\"My heat pump journey part two: making a plan - 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