{"id":14490,"date":"2026-09-28T17:07:33","date_gmt":"2026-09-28T15:07:33","guid":{"rendered":"https:\/\/templari.com\/monobloc-heat-pump\/"},"modified":"2026-10-26T14:03:10","modified_gmt":"2026-10-26T13:03:10","slug":"monobloc-heat-pump","status":"publish","type":"page","link":"https:\/\/templari.com\/en\/monobloc-heat-pump\/","title":{"rendered":"Monobloc heat pump: what it is, monobloc vs split, and when it makes sense"},"content":{"rendered":"<h1 style=\"padding-top: 40px;\">Monobloc heat pump: what it is and when it makes sense<\/h1>\n<p>A <strong>monobloc heat pump<\/strong> has the whole refrigerant circuit in a single outdoor unit: compressor, heat exchangers, fan and expansion valve are sealed in the factory inside the same casing. Only two water pipes, the heating flow and return, and the power cable go into the house. All our air-to-water heat pumps are built this way.<\/p>\n<figure style=\"margin:28px 0;\"><img decoding=\"async\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" data-src=\"https:\/\/templari.com\/wp-content\/uploads\/2026\/10\/pompa-di-calore-monoblocco-neve.jpg\" class=\"lazyload\" width=\"1600\" height=\"1200\" alt=\"Two Templari monobloc heat pumps in the snow next to the wall of a house\" loading=\"lazy\" style=\"width:100%;height:auto;aspect-ratio:1600\/1200;border-radius:8px;display:block;\"><noscript><img decoding=\"async\" src=\"https:\/\/templari.com\/wp-content\/uploads\/2026\/10\/pompa-di-calore-monoblocco-neve.jpg\" width=\"1600\" height=\"1200\" alt=\"Two Templari monobloc heat pumps in the snow next to the wall of a house\" loading=\"lazy\" style=\"width:100%;height:auto;aspect-ratio:1600\/1200;border-radius:8px;display:block;\"><\/noscript><figcaption style=\"color:#bbbbbb;font-size:14px;margin-top:8px;\">Two Templari air-to-water monoblocs in the snow: the whole refrigerant circuit stays out here.<\/figcaption><\/figure>\n<h2>What is a monobloc heat pump<\/h2>\n<p>Monobloc means the machine is one single block. Inside the outdoor unit the refrigerant takes heat from the air, the compressor raises its temperature and a plate heat exchanger passes it to the water, all inside the same casing. What comes out is hot water, which goes to the underfloor heating, the radiators or the hot water cylinder, just like the water from a boiler. The refrigerant circuit is charged and tested in the factory and is never opened on site.<\/p>\n<p>For the installer it means working as with a boiler: water pipes, valves, expansion vessel and electrical connection. We explain the refrigeration cycle step by step in the article <a href=\"\/en\/news\/how-a-heat-pump-works\/\" style=\"color:#45e3ff;text-decoration:underline;\">how a heat pump works<\/a>.<\/p>\n<h2>Why propane R290 goes in a monobloc<\/h2>\n<p>R290 is propane: a natural refrigerant with GWP 3. It is not a fluorinated gas, so it has no periodic F-Gas checks. It is, however, flammable, class A3. In a monobloc the whole charge stays in the outdoor unit, in the open air, and no refrigerant enters the house; installation follows the safety rules of EN 378.<\/p>\n<p>That is why all our air-to-water units are R290 monoblocs. We describe what is inside a propane heat pump in the article <a href=\"\/en\/news\/heat-pump-r290-how-it-is-built\/\" style=\"color:#45e3ff;text-decoration:underline;\">R290 heat pump: how it is built<\/a>.<\/p>\n<figure style=\"margin:28px 0;\"><img decoding=\"async\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" data-src=\"https:\/\/templari.com\/wp-content\/uploads\/2026\/08\/Aria-Acqua-R290_3.png\" class=\"lazyload\" width=\"800\" height=\"800\" alt=\"Templari monobloc air-to-water heat pump, the fan close up\" loading=\"lazy\" style=\"width:100%;height:auto;aspect-ratio:800\/800;border-radius:8px;display:block;\"><noscript><img decoding=\"async\" src=\"https:\/\/templari.com\/wp-content\/uploads\/2026\/08\/Aria-Acqua-R290_3.png\" width=\"800\" height=\"800\" alt=\"Templari monobloc air-to-water heat pump, the fan close up\" loading=\"lazy\" style=\"width:100%;height:auto;aspect-ratio:800\/800;border-radius:8px;display:block;\"><\/noscript><figcaption style=\"color:#bbbbbb;font-size:14px;margin-top:8px;\">Templari R290 monobloc: all the propane stays in the outdoor unit.<\/figcaption><\/figure>\n<h2>Outdoor or indoor monobloc heat pump<\/h2>\n<p>Anyone looking for a monobloc will also find indoor models: the machine sits inside the house, in a plant room, and draws and returns outdoor air through two ducts in the wall. There is nothing in the garden or on the facade, but you need space, two large holes in the wall and a room where the noise of compressor and fan will not bother anyone. Our monoblocs are all outdoor units: only the hydraulic part stays inside.<\/p>\n<h2>The weak point: water pipes in winter<\/h2>\n<p>In a monobloc the heating water leaves the house and runs to the outdoor unit. If the machine stops during a frost, for example during a power cut, that water can freeze in the pipes or in the exchanger. So the outdoor run must be short and insulated, and the installer adds protection: anti-freeze valves that drain the water below a set temperature, or glycol in the circuit.<\/p>\n<h2>Where it goes: space and noise<\/h2>\n<p>A monobloc stands outdoors on a base, with free space in front of the fan and behind the coil so the air can circulate. Where you put it matters: away from bedroom windows and not in a closed corner where cold air lingers. Sizes, weights and noise of our monoblocs:<\/p>\n<div style=\"overflow-x:auto;margin:16px 0;\">\n<table style=\"width:100%;border-collapse:collapse;margin:16px 0;font-size:0.95em;background:#ffffff !important;color:#1a1a1a !important\">\n<thead>\n<tr>\n<th style=\"text-align:left;border-bottom:2px solid #cfcfcf;padding:10px;color:#1a1a1a !important;background:#f2f2f2 !important\">Model<\/th>\n<th style=\"text-align:left;border-bottom:2px solid #cfcfcf;padding:10px;color:#1a1a1a !important;background:#f2f2f2 !important\">Output<\/th>\n<th style=\"text-align:left;border-bottom:2px solid #cfcfcf;padding:10px;color:#1a1a1a !important;background:#f2f2f2 !important\">Sound pressure at 1 m<\/th>\n<th style=\"text-align:left;border-bottom:2px solid #cfcfcf;padding:10px;color:#1a1a1a !important;background:#f2f2f2 !important\">Dimensions (H x W x D)<\/th>\n<th style=\"text-align:left;border-bottom:2px solid #cfcfcf;padding:10px;color:#1a1a1a !important;background:#f2f2f2 !important\">Weight<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"padding:10px;border-bottom:1px solid #e0e0e0;color:#1a1a1a !important;vertical-align:top;\">Kita XS<\/td>\n<td style=\"padding:10px;border-bottom:1px solid #e0e0e0;color:#1a1a1a !important;vertical-align:top;\">7.5 \/ 9 kW<\/td>\n<td style=\"padding:10px;border-bottom:1px solid #e0e0e0;color:#1a1a1a !important;vertical-align:top;\">50.5 dB(A)<\/td>\n<td style=\"padding:10px;border-bottom:1px solid #e0e0e0;color:#1a1a1a !important;vertical-align:top;\">1000 x 1000 x 435 mm (low version)<br \/>1205 x 1000 x 435 mm (high version)<\/td>\n<td style=\"padding:10px;border-bottom:1px solid #e0e0e0;color:#1a1a1a !important;vertical-align:top;\">155 \/ 160 kg<\/td>\n<\/tr>\n<tr>\n<td style=\"padding:10px;border-bottom:1px solid #e0e0e0;color:#1a1a1a !important;vertical-align:top;\">Kita SP<\/td>\n<td style=\"padding:10px;border-bottom:1px solid #e0e0e0;color:#1a1a1a !important;vertical-align:top;\">8 \/ 10 \/ 12 kW<\/td>\n<td style=\"padding:10px;border-bottom:1px solid #e0e0e0;color:#1a1a1a !important;vertical-align:top;\">46.8 dB(A)<\/td>\n<td style=\"padding:10px;border-bottom:1px solid #e0e0e0;color:#1a1a1a !important;vertical-align:top;\">908 x 1406 x 550 mm<\/td>\n<td style=\"padding:10px;border-bottom:1px solid #e0e0e0;color:#1a1a1a !important;vertical-align:top;\">180 kg<\/td>\n<\/tr>\n<tr>\n<td style=\"padding:10px;border-bottom:1px solid #e0e0e0;color:#1a1a1a !important;vertical-align:top;\">Kita MP<\/td>\n<td style=\"padding:10px;border-bottom:1px solid #e0e0e0;color:#1a1a1a !important;vertical-align:top;\">14 &#8211; 20 kW<\/td>\n<td style=\"padding:10px;border-bottom:1px solid #e0e0e0;color:#1a1a1a !important;vertical-align:top;\">47.2-47.3 dB(A)<\/td>\n<td style=\"padding:10px;border-bottom:1px solid #e0e0e0;color:#1a1a1a !important;vertical-align:top;\">1012 x 1591 x 546 mm<\/td>\n<td style=\"padding:10px;border-bottom:1px solid #e0e0e0;color:#1a1a1a !important;vertical-align:top;\">220 kg<\/td>\n<\/tr>\n<tr>\n<td style=\"padding:10px;border-bottom:1px solid #e0e0e0;color:#1a1a1a !important;vertical-align:top;\">Kita LP<\/td>\n<td style=\"padding:10px;border-bottom:1px solid #e0e0e0;color:#1a1a1a !important;vertical-align:top;\">22 &#8211; 35 kW<\/td>\n<td style=\"padding:10px;border-bottom:1px solid #e0e0e0;color:#1a1a1a !important;vertical-align:top;\">48.4-53.3 dB(A)<\/td>\n<td style=\"padding:10px;border-bottom:1px solid #e0e0e0;color:#1a1a1a !important;vertical-align:top;\">1257 x 1791 x 641 mm<\/td>\n<td style=\"padding:10px;border-bottom:1px solid #e0e0e0;color:#1a1a1a !important;vertical-align:top;\">280 kg<\/td>\n<\/tr>\n<tr>\n<td style=\"padding:10px;border-bottom:1px solid #e0e0e0;color:#1a1a1a !important;vertical-align:top;\">Kita LP Plus<\/td>\n<td style=\"padding:10px;border-bottom:1px solid #e0e0e0;color:#1a1a1a !important;vertical-align:top;\">35 \/ 40 kW<\/td>\n<td style=\"padding:10px;border-bottom:1px solid #e0e0e0;color:#1a1a1a !important;vertical-align:top;\">50.3 dB(A)<\/td>\n<td style=\"padding:10px;border-bottom:1px solid #e0e0e0;color:#1a1a1a !important;vertical-align:top;\">1414 x 2018 x 956 mm<\/td>\n<td style=\"padding:10px;border-bottom:1px solid #e0e0e0;color:#1a1a1a !important;vertical-align:top;\">320 kg<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>Noise values are sound pressure at 1 metre, as given on the product pages.<\/p>\n<h2>Installation and cost: what changes with a monobloc<\/h2>\n<p>Connecting a monobloc is a job for a plumber and an electrician: water pipes, valves, expansion vessel, hot water cylinder, power cable. The refrigerant circuit arrives sealed and tested from the factory, so on site there is no refrigeration engineer, no evacuation and no gas charging. With propane there is not even the F-Gas logbook with periodic leak checks.<\/p>\n<p>The final cost depends on the heating system in the house: underfloor heating or radiators, hot water cylinder, buffer tank.<\/p>\n<h2>Which output: 8, 12 or 20 kW<\/h2>\n<p>The next question is the output, and the answer is not in the floor area. As a rough guide, a 150 m\u00b2 house built to class A needs 4-6 kW on the coldest day; the same house built before 1990 and never insulated needs 12-18 kW. A home usually needs up to 20 kW, up to 30 if it is large and old.<\/p>\n<p>The real figure is calculated from the heat losses of the building, according to EN 12831: we explain how in the article <a href=\"\/en\/news\/heat-pump-inverter-sizing-half-capacity\/\" style=\"color:#45e3ff;text-decoration:underline;\">on heat pump sizing<\/a>. Our monoblocs deliver water up to 70 \u00b0C, so they also work with radiators: read <a href=\"\/en\/news\/heat-pump-with-radiators-does-it-work\/\" style=\"color:#45e3ff;text-decoration:underline;\">heat pump with radiators<\/a>.<\/p>\n<h2>Templari monobloc heat pumps<\/h2>\n<p>All Templari air-to-water heat pumps are propane R290 monoblocs, energy class A+++, with domestic hot water up to 70 \u00b0C without a backup boiler. Kita SP, MP, LP and LP Plus work with outdoor temperatures below -20 \u00b0C.<\/p>\n<ul>\n<li><a href=\"\/en\/air-to-water-heat-pumps\/kita-xs\/\" style=\"color:#45e3ff;text-decoration:underline;\">Kita XS<\/a> 7.5 and 9 kW: houses and flats, also with the Armadio Tecnico Mono cabinet;<\/li>\n<li><a href=\"\/en\/air-to-water-heat-pumps\/kita-sp\/\" style=\"color:#45e3ff;text-decoration:underline;\">Kita SP<\/a> 8, 10 and 12 kW: detached houses;<\/li>\n<li><a href=\"\/en\/air-to-water-heat-pumps\/kita-mp\/\" style=\"color:#45e3ff;text-decoration:underline;\">Kita MP<\/a> 14 to 20 kW: large houses and small offices;<\/li>\n<li><a href=\"\/en\/air-to-water-heat-pumps\/kita-lp\/\" style=\"color:#45e3ff;text-decoration:underline;\">Kita LP<\/a> 22 to 35 kW, and the <a href=\"\/en\/air-to-water-heat-pumps\/kita-lp-plus\/\" style=\"color:#45e3ff;text-decoration:underline;\">Kita LP Plus<\/a> at 35 and 40 kW: apartment blocks, commercial buildings, large and old houses.<\/li>\n<\/ul>\n<figure style=\"margin:28px 0;\"><img decoding=\"async\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" data-src=\"https:\/\/templari.com\/wp-content\/uploads\/2025\/12\/Foto-24-Realizzazioni.jpg\" class=\"lazyload\" width=\"1200\" height=\"1200\" alt=\"Templari monobloc air-to-water heat pump just installed\" loading=\"lazy\" style=\"width:100%;height:auto;aspect-ratio:1200\/1200;border-radius:8px;display:block;\"><noscript><img decoding=\"async\" src=\"https:\/\/templari.com\/wp-content\/uploads\/2025\/12\/Foto-24-Realizzazioni.jpg\" width=\"1200\" height=\"1200\" alt=\"Templari monobloc air-to-water heat pump just installed\" loading=\"lazy\" style=\"width:100%;height:auto;aspect-ratio:1200\/1200;border-radius:8px;display:block;\"><\/noscript><figcaption style=\"color:#bbbbbb;font-size:14px;margin-top:8px;\">A Templari monobloc just installed: only water and power go into the house.<\/figcaption><\/figure>\n<p><a href=\"\/en\/air-to-water-heat-pumps\/\" style=\"color:#45e3ff;text-decoration:underline;font-weight:700;\">See the whole air-to-water range<\/a><\/p>\n<div id=\"tpl-faq\" style=\"background:#0b1f2a;color:#ffffff;border:1px solid #45e3ff;padding:20px 24px;margin:30px 0;\">\n<h2 style=\"color:#ffffff;margin:0 0 12px;\">Frequently asked questions<\/h2>\n<h3 style=\"color:#ffffff;font-size:18px;margin:16px 0 4px;\">What is a monobloc heat pump?<\/h3>\n<p style=\"color:#ffffff;margin:0;\">It is a heat pump with the whole refrigerant circuit in a single outdoor unit, sealed in the factory: only the heating water pipes and the power cable go into the house.<\/p>\n<h3 style=\"color:#ffffff;font-size:18px;margin:16px 0 4px;\">Is there an indoor monobloc heat pump?<\/h3>\n<p style=\"color:#ffffff;margin:0;\">Yes: the machine sits inside and draws outdoor air through two ducts in the wall. It needs space and a room where the noise does not disturb. Templari monoblocs are all outdoor units.<\/p>\n<h3 style=\"color:#ffffff;font-size:18px;margin:16px 0 4px;\">What happens to the water pipes in a frost?<\/h3>\n<p style=\"color:#ffffff;margin:0;\">If the machine stops, the water in the outdoor section can freeze. It is protected with short, insulated pipes and with anti-freeze valves or glycol, as the installer specifies.<\/p>\n<h3 style=\"color:#ffffff;font-size:18px;margin:16px 0 4px;\">Are Templari heat pumps monobloc?<\/h3>\n<p style=\"color:#ffffff;margin:0;\">Yes. All Templari air-to-water heat pumps are propane R290 monoblocs, from 7.5 to 40 kW.<\/p>\n<h3 style=\"color:#ffffff;font-size:18px;margin:16px 0 4px;\">Do you need a refrigeration engineer to install a monobloc heat pump?<\/h3>\n<p style=\"color:#ffffff;margin:0;\">No: the refrigerant circuit is sealed at the factory. A plumber for the water and an electrician for the power are enough.<\/p>\n<h3 style=\"color:#ffffff;font-size:18px;margin:16px 0 4px;\">What maintenance does a monobloc heat pump need?<\/h3>\n<p style=\"color:#ffffff;margin:0;\">The same as any water-based heating system, plus cleaning the outdoor coil. With propane there are no F-Gas checks. Everything else is in our <a href=\"\/en\/news\/heat-pump-maintenance-servicing\/\" style=\"color:#45e3ff;text-decoration:underline;\">article on maintenance<\/a>.<\/p>\n<\/div>\n<p><script type=\"application\/ld+json\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What is a monobloc heat pump?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"It is a heat pump with the whole refrigerant circuit in a single outdoor unit, sealed in the factory: only the heating water pipes and the power cable go into the house.\"}},{\"@type\":\"Question\",\"name\":\"Is there an indoor monobloc heat pump?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes: the machine sits inside and draws outdoor air through two ducts in the wall. It needs space and a room where the noise does not disturb. 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Everything else is in our article on maintenance.\"}}]}<\/script><\/p>\n<div id=\"tpl-leggi-anche\" style=\"background:#0b1f2a;color:#ffffff;border:1px solid #45e3ff;padding:20px 24px;margin:30px 0;\">\n<p style=\"color:#ffffff;font-weight:700;margin:0 0 8px;\">Read also<\/p>\n<ul style=\"color:#ffffff;margin:0;padding-left:20px;\">\n<li style=\"margin:6px 0;\"><a href=\"\/en\/news\/how-a-heat-pump-works\/\" style=\"color:#45e3ff;text-decoration:underline;\">How does a heat pump work: heat is not produced, it is moved<\/a><\/li>\n<li style=\"margin:6px 0;\"><a href=\"\/en\/news\/heat-pump-inverter-sizing-half-capacity\/\" style=\"color:#45e3ff;text-decoration:underline;\">Heat pump sizing: an inverter heat pump is sized to run at half capacity<\/a><\/li>\n<li style=\"margin:6px 0;\"><a href=\"\/en\/news\/heat-pump-r290-how-it-is-built\/\" style=\"color:#45e3ff;text-decoration:underline;\">R290 heat pump: what is inside a propane air-to-water unit<\/a><\/li>\n<li style=\"margin:6px 0;\"><a href=\"\/en\/news\/heat-pump-with-radiators-does-it-work\/\" style=\"color:#45e3ff;text-decoration:underline;\">Heat pumps and radiators: does it work? Yes, and better with propane<\/a><\/li>\n<li style=\"margin:6px 0;\"><a href=\"\/en\/news\/how-much-electricity-does-a-heat-pump-use\/\" style=\"color:#45e3ff;text-decoration:underline;\">How much electricity does a heat pump use: per day, per year and by size, with the data sheet figures<\/a><\/li>\n<li style=\"margin:6px 0;\"><a href=\"\/en\/news\/heat-pump-and-photovoltaics\/\" style=\"color:#45e3ff;text-decoration:underline;\">Heat pump and solar panels: how much the roof really covers, month by month, and how to make them work together<\/a><\/li>\n<li class=\"tpl-vedi-anche\" style=\"margin:6px 0;\"><a href=\"https:\/\/templari.com\/en\/news\/heat-pump-installation\/\" rel=\"noreferrer\" style=\"color:#45e3ff;text-decoration:underline;\">Heat pump installation: where to put it, what you need and how it is done, step by step<\/a><\/li>\n<\/ul>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Monobloc heat pump: what it is and when it makes sense A monobloc heat pump has the whole refrigerant circuit in a single outdoor unit: compressor, heat exchangers, fan and&#8230;<\/p>\n","protected":false},"author":3,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"_yoast_wpseo_focuskw":"monobloc heat pump","_yoast_wpseo_title":"Monobloc heat pump: what it is, R290, installation | Templari","_yoast_wpseo_metadesc":"Monobloc heat pump: what it is, why propane R290 goes in a monobloc, indoor or outdoor, frost on the water pipes, space and noise. 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