{"id":18773,"date":"2026-10-24T14:52:35","date_gmt":"2026-10-24T12:52:35","guid":{"rendered":"https:\/\/templari.com\/heat-pump-installation\/"},"modified":"2026-10-26T12:42:35","modified_gmt":"2026-10-26T11:42:35","slug":"heat-pump-installation","status":"publish","type":"post","link":"https:\/\/templari.com\/en\/news\/heat-pump-installation\/","title":{"rendered":"Heat pump installation: where to put it, what you need and how it is done, step by step"},"content":{"rendered":"<div id=\"aa\">\n<style>body:has(#aa){overflow:visible!important;overflow-x:clip!important}body:has(#aa) .featured-media-under-header{display:none!important}body:has(#aa) .container-wrap{padding:0!important;background:#000!important}body:has(#aa) .container-wrap .main-content,body:has(#aa) .main-content>.row,body:has(#aa) .post-area,body:has(#aa) article.post,body:has(#aa) article .inner-wrap,body:has(#aa) .post-content,body:has(#aa) 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summary{list-style:none;cursor:pointer;font-size:19px;font-weight:600;color:#fff;display:flex;justify-content:space-between;gap:18px}#aa .chiara summary{color:#051822}#aa summary::-webkit-details-marker{display:none}#aa summary:after{content:\"+\";color:#0BABE4;font-size:26px;line-height:1;font-weight:400}#aa .chiara summary:after{color:#05587a}#aa details[open] summary:after{content:\"\\2212\"}#aa details p{margin:12px 0 0}#aa .larga,#aa .fine .wrap{max-width:1160px}@media(min-width:1000px){#aa .duo .larga{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,1fr);gap:56px;align-items:start}#aa .duo.inv .testo{order:2}#aa .duo .foto{position:sticky;top:190px}#aa .duo .foto figure{margin:0 0 26px}#aa .duo .foto figure:last-child{margin-bottom:0}#aa .duo .foto img{max-height:72vh}#aa .duo.senza .larga{grid-template-columns:minmax(0,1fr) minmax(0,1.6fr)}#aa .duo.senza .testa{position:sticky;top:190px}}body:has(#aa) #header-outer{background:#000!important}#aa .fine{padding:36px 0 52px}#aa .fine p{font-size:16px}@media(max-width:820px){#aa{font-size:18px}#aa p,#aa li{font-size:18px}#aa .hero{min-height:auto}#aa .hero .in{padding:96px 20px 32px}#aa .lead{font-size:18px}#aa .sec{padding:40px 0}#aa .wrap{padding:0 20px}#aa .subnav{top:64px}#aa .faq .wrap{grid-template-columns:1fr;gap:8px}}<\/style>\n<section class=\"hero\" style=\"background-image:url(https:\/\/templari.com\/wp-content\/uploads\/2026\/10\/p16-kita-x-pompa-di-calore-ibrido-2-5.jpg)\">\n<div class=\"in\"><span class=\"badge\">Technical tips<\/span><\/p>\n<h1>Heat pump installation: where to put it, what you need and how it is done, step by step<\/h1>\n<p class=\"lead\">Installation is the most searched topic after the unit itself: in France &#8220;installation pompe \u00e0 chaleur&#8221; 5,400 times a month, in Poland &#8220;monta\u017c pompy ciep\u0142a&#8221; 1,900, in Germany, the Netherlands and Spain 1,600, in the UK &#8220;heat pump installation&#8221; 2,900. Here we follow an air-to-water monobloc heat pump like ours from the survey to the first start-up, with the things that decide whether the system works well for twenty years. We do not give prices: they depend on the house.<\/p>\n<\/div>\n<\/section>\n<div class=\"subnav\">\n<nav><a href=\"#s1\">First: the calculation and the survey<\/a><a href=\"#s2\">Where the unit goes outside<\/a><a href=\"#s3\">The defrost water<\/a><a href=\"#s4\">Only two water pipes come into the house<\/a><a href=\"#s5\">Electrics and sensors<\/a><a href=\"#s6\">First start-up and commissioning<\/a><a href=\"#s7\">What to ask the installer<\/a><a href=\"#s8\">Frequently asked questions<\/a><\/nav>\n<\/div>\n<section class=\"sec chiara\">\n<div class=\"wrap\">\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" data-src=\"https:\/\/templari.com\/wp-content\/uploads\/2026\/10\/installazione-pompa-di-calore-sette-fasi-en.jpg\" class=\"lazyload\" alt=\"The seven stages of installing an air-to-water monobloc: on site nobody opens the refrigerant circuit\" width=\"760\" height=\"1565\" loading=\"lazy\"><noscript><img decoding=\"async\" src=\"https:\/\/templari.com\/wp-content\/uploads\/2026\/10\/installazione-pompa-di-calore-sette-fasi-en.jpg\" alt=\"The seven stages of installing an air-to-water monobloc: on site nobody opens the refrigerant circuit\" width=\"760\" height=\"1565\" loading=\"lazy\"><\/noscript><figcaption>The seven stages of installing an air-to-water monobloc: on site nobody opens the refrigerant circuit.<\/figcaption><\/figure>\n<\/div>\n<\/section>\n<section id=\"s1\" class=\"sec duo senza\">\n<div class=\"wrap larga\">\n<div class=\"testa\">\n<p class=\"num\">01<\/p>\n<h2>First: the calculation and the survey<\/h2>\n<\/div>\n<div class=\"testo\">\n<p>The output is not copied from the old boiler: it is calculated from the house&#8217;s heat losses on the coldest day of the area, as we explain in the <a href=\"https:\/\/templari.com\/en\/news\/heat-pump-inverter-sizing-half-capacity\/\" rel=\"noreferrer\">article on sizing<\/a>. At the survey the existing system is checked: with radiators it is worth first running the winter test with the boiler at 55 \u00b0C, described in the <a href=\"https:\/\/templari.com\/en\/news\/heat-pump-with-radiators-does-it-work\/\" rel=\"noreferrer\">article on heat pumps with radiators<\/a>. And it is decided where the unit, the buffer tank and the cylinder go.<\/p>\n<\/div>\n<\/div>\n<\/section>\n<section id=\"s2\" class=\"sec duo chiara inv\">\n<div class=\"wrap larga\">\n<div class=\"testo\">\n<p class=\"num\">02<\/p>\n<h2>Where the unit goes outside<\/h2>\n<p>A monobloc stands outdoors, on a stable base separate from the house and on anti-vibration feet, with free space in front of the fan and behind the coil so the air can circulate. Away from corners and bedroom windows, with the air outlet facing the garden: distances from the neighbours are explained in the <a href=\"https:\/\/templari.com\/en\/news\/heat-pump-noise\/\" rel=\"noreferrer\">article on noise<\/a>. With propane there is one more rule. Propane is about one and a half times heavier than air (PubChem): if it ever leaked, it would sink. That is why there is a safety zone around the unit, given in the manual according to EN 378, inside which there must be no windows, doors, light wells, drains, gullies or electrical sockets.<\/p>\n<\/div>\n<div class=\"foto\">\n<figure class=\"wp-block-image size-large\"><picture><source media=\"(max-width: 767px)\" srcset=\"https:\/\/templari.com\/wp-content\/uploads\/2026\/10\/installazione-pompa-di-calore-dove-metterla-en-telefono.jpg\" \/><img decoding=\"async\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" data-src=\"https:\/\/templari.com\/wp-content\/uploads\/2026\/10\/installazione-pompa-di-calore-dove-metterla-en.jpg\" class=\"lazyload\" alt=\"Where the unit goes: propane safety zone, space for the air, gravel for the defrost water, away from corners and windows\" width=\"1400\" height=\"669\" loading=\"lazy\"><noscript><img decoding=\"async\" src=\"https:\/\/templari.com\/wp-content\/uploads\/2026\/10\/installazione-pompa-di-calore-dove-metterla-en.jpg\" alt=\"Where the unit goes: propane safety zone, space for the air, gravel for the defrost water, away from corners and windows\" width=\"1400\" height=\"669\" loading=\"lazy\"><\/noscript><\/picture><figcaption>Where the unit goes: propane safety zone, space for the air, gravel for the defrost water, away from corners and windows.<\/figcaption><\/figure>\n<\/div>\n<\/div>\n<\/section>\n<section id=\"s3\" class=\"sec duo senza\">\n<div class=\"wrap larga\">\n<div class=\"testa\">\n<p class=\"num\">03<\/p>\n<h2>The defrost water<\/h2>\n<\/div>\n<div class=\"testo\">\n<p>In winter the unit melts the frost on the coil and discharges water, sometimes several times a day, as we explain in the <a href=\"https:\/\/templari.com\/en\/news\/heat-pump-timed-or-demand-defrost\/\" rel=\"noreferrer\">article on defrosting<\/a>. That water must go onto a gravel bed or into a frost-protected drain, never onto a path or steps, where it would turn to ice.<\/p>\n<\/div>\n<\/div>\n<\/section>\n<section id=\"s4\" class=\"sec duo senza chiara\">\n<div class=\"wrap larga\">\n<div class=\"testa\">\n<p class=\"num\">04<\/p>\n<h2>Only two water pipes come into the house<\/h2>\n<\/div>\n<div class=\"testo\">\n<p>In a monobloc the refrigerant circuit is sealed and tested at the factory: nobody opens it on site, and only the water flow and return come into the house. The outdoor section must be short and insulated, with frost protection: anti-freeze valves that drain the water below a certain temperature, or glycol in the circuit, as we explain on the <a href=\"https:\/\/templari.com\/en\/monobloc-heat-pump\/\" rel=\"noreferrer\">page on the monobloc<\/a>. Inside go the buffer tank, plain and not stratified, the hot water cylinder, ideally 300-500 litres, and a dirt filter: the system water must be treated, because whatever settles ends up in the heat exchangers. The reasons are in the <a href=\"https:\/\/templari.com\/en\/news\/heat-pump-buffer-tank\/\" rel=\"noreferrer\">article on the buffer tank<\/a>.<\/p>\n<\/div>\n<\/div>\n<\/section>\n<section id=\"s5\" class=\"sec duo senza\">\n<div class=\"wrap larga\">\n<div class=\"testa\">\n<p class=\"num\">05<\/p>\n<h2>Electrics and sensors<\/h2>\n<\/div>\n<div class=\"testo\">\n<p>The unit needs its own electrical line from the board, with the protection and cable size given in the manual. Then the controls: with HCC each room gets a temperature and humidity sensor, and the unit regulates on the rooms, not on the buffer tank sensor. Why, we explain in the <a href=\"https:\/\/templari.com\/en\/news\/heat-pump-is-not-a-boiler-hcc\/\" rel=\"noreferrer\">article on why a heat pump is not a boiler<\/a> and in the one <a href=\"https:\/\/templari.com\/en\/news\/heat-pump-controls-thermostats-underfloor-cooling\/\" rel=\"noreferrer\">on the complete system<\/a>.<\/p>\n<\/div>\n<\/div>\n<\/section>\n<section id=\"s6\" class=\"sec duo senza chiara\">\n<div class=\"wrap larga\">\n<div class=\"testa\">\n<p class=\"num\">06<\/p>\n<h2>First start-up and commissioning<\/h2>\n<\/div>\n<div class=\"testo\">\n<p>The system is filled, the air is vented, pressure and flow are checked and the heating curve is set, that is the water temperature according to the cold outside, as we explain in the <a href=\"https:\/\/templari.com\/en\/news\/heat-pump-heating-curve-weather-compensation\/\" rel=\"noreferrer\">article on the heating curve<\/a>. At the end the installer hands over the documents; in Italy this includes the declaration of conformity of the system (Ministerial Decree 37\/2008). From then on the checks are those in the <a href=\"https:\/\/templari.com\/en\/news\/heat-pump-maintenance-servicing\/\" rel=\"noreferrer\">article on maintenance<\/a>.<\/p>\n<\/div>\n<\/div>\n<\/section>\n<section id=\"s7\" class=\"sec duo senza\">\n<div class=\"wrap larga\">\n<div class=\"testa\">\n<p class=\"num\">07<\/p>\n<h2>What to ask the installer<\/h2>\n<\/div>\n<div class=\"testo\">\n<p>Six questions. What calculation the output is based on. Where the unit will go and whether the safety zone in the manual has been checked. Where the defrost water goes. How the outdoor pipes are protected from frost. Which buffer tank and cylinder are fitted. And what controls the unit: the rooms or the buffer tank sensor. If you want an opinion on your house, <a href=\"https:\/\/templari.com\/en\/contacts\/\" rel=\"noreferrer\">ask us for information<\/a>.<\/p>\n<\/div>\n<\/div>\n<\/section>\n<section id=\"s8\" class=\"sec faq chiara\">\n<div class=\"wrap\">\n<div>\n<p class=\"num\">08<\/p>\n<h2>Frequently asked questions<\/h2>\n<\/div>\n<div>\n<details>\n<summary>Where is an air-to-water heat pump installed?<\/summary>\n<p>Outdoors, on a base separate from the house, with free space for the air, away from corners and bedroom windows. With propane, the safety zone must be free of windows, doors, light wells, drains and sockets.<\/p>\n<\/details>\n<details>\n<summary>Do you need a refrigeration engineer to install a monobloc heat pump?<\/summary>\n<p>No: the refrigerant circuit is sealed and tested at the factory. On site only the water and electrical connections are made.<\/p>\n<\/details>\n<details>\n<summary>Can a heat pump go near a window?<\/summary>\n<p>Not inside the safety zone given in the manual, because propane is heavier than air. And for noise, better away from bedroom windows: for a free-standing Kita X the German LAI guide gives at least 4.6 metres from the neighbour&#8217;s window at night.<\/p>\n<\/details>\n<details>\n<summary>Where does the water coming out of a heat pump in winter go?<\/summary>\n<p>It is defrost water: it must go onto a gravel bed or into a frost-protected drain, never onto a path or steps.<\/p>\n<\/details>\n<details>\n<summary>What is needed indoors for a monobloc heat pump?<\/summary>\n<p>Two water pipes, a plain buffer tank, a hot water cylinder, ideally 300-500 litres, a filter, a dedicated electrical line and the room sensors.<\/p>\n<\/details>\n<details>\n<summary>Who can install a heat pump?<\/summary>\n<p>A qualified installer. In Italy they issue the declaration of conformity required by Ministerial Decree 37\/2008.<\/p>\n<\/details>\n<\/div>\n<\/div>\n<\/section>\n<section class=\"fine\">\n<div class=\"wrap\">\n<p><small>Sources: <a href=\"https:\/\/pubchem.ncbi.nlm.nih.gov\/compound\/Propane\" rel=\"noreferrer\" rel=\"nofollow\">PubChem, Propane<\/a> \u00b7 EN 378 \u00b7 DM 37\/2008<\/small><\/p>\n<p class=\"tpl-vedi-anche\"><strong>See also:<\/strong> <a href=\"https:\/\/templari.com\/en\/heat-pump-block-of-flats\/\" rel=\"noreferrer\">Heat pump for a block of flats: communal or one per flat, output, hot water and where it goes<\/a> \u00b7 <a href=\"https:\/\/templari.com\/en\/news\/heat-pump-for-flat\/\" rel=\"noreferrer\">Heat pump for a flat: can you have one without an outdoor unit? What goes outside and what goes indoors<\/a> \u00b7 <a href=\"https:\/\/templari.com\/en\/news\/three-phase-or-single-phase-heat-pump\/\" rel=\"noreferrer\">Three phase or single phase heat pump: which to choose and what supply you need<\/a><\/p>\n<p><em>All the technical tips are on the <a href=\"https:\/\/templari.com\/en\/technical-tips\/\" rel=\"noreferrer\">series page<\/a>.<\/em><\/p>\n<\/div>\n<\/section>\n<\/div>\n<p><script>(function(){var a=[].slice.call(document.querySelectorAll('#aa .subnav a')),n=document.querySelector('#aa .subnav'),h=document.getElementById('header-outer');function u(){if(n&&h)n.style.top=Math.max(0,h.getBoundingClientRect().bottom)+'px';var y=window.scrollY+200,c=null;a.forEach(function(l){var s=document.querySelector(l.getAttribute('href'));if(s&&s.offsetTop<=y)c=l});a.forEach(function(l){l.classList.toggle('on',l===c)});if(c&#038;&#038;c!==u.c){u.c=c;c.parentNode.scrollTo({left:c.offsetLeft-20,behavior:'smooth'})}}window.addEventListener('scroll',function(){u();setTimeout(u,400)},{passive:true});u()})();<\/script><script type=\"application\/ld+json\">{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"Where is an air-to-water heat pump installed?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Outdoors, on a base separate from the house, with free space for the air, away from corners and bedroom windows. 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In Italy they issue the declaration of conformity required by Ministerial Decree 37\/2008.\"}}]}<\/script><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Technical tips Heat pump installation: where to put it, what you need and how it is done, step by step Installation is the most searched topic after the unit itself:&#8230;<\/p>\n","protected":false},"author":3,"featured_media":14058,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_yoast_wpseo_meta-robots-noindex":"","footnotes":""},"categories":[201],"tags":[],"class_list":["post-18773","post","type-post","status-publish","format-standard","has-post-thumbnail","category-technical-tips"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Heat pump installation, step by step | Templari<\/title>\n<meta name=\"description\" content=\"Heat pump installation: air-to-water monobloc. 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