{"id":21387,"date":"2026-10-24T18:01:55","date_gmt":"2026-10-24T16:01:55","guid":{"rendered":"https:\/\/templari.com\/heat-pump-underfloor-heating\/"},"modified":"2026-10-24T18:01:56","modified_gmt":"2026-10-24T16:01:56","slug":"heat-pump-underfloor-heating","status":"publish","type":"page","link":"https:\/\/templari.com\/en\/heat-pump-underfloor-heating\/","title":{"rendered":"Heat pump with underfloor heating: water temperature, running costs and summer cooling"},"content":{"rendered":"<h1 style=\"padding-top: 40px;\">Heat pump with underfloor heating: water temperature, running costs and summer cooling<\/h1>\n<p>&#8220;Heat pump underfloor heating&#8221; is searched 480 times a month in the UK; in Spain &#8220;aerotermia suelo radiante&#8221; 1,600, in the Netherlands &#8220;warmtepomp vloerverwarming&#8221; 1,600, in Germany &#8220;W\u00e4rmepumpe Fu\u00dfbodenheizung&#8221; 1,300. Underfloor heating and a heat pump are the pair that performs best. Here is why, what water temperature it needs, how rooms are controlled and what the floor does in summer.<\/p>\n<h2>Why they work well together<\/h2>\n<p>The floor heats a large surface with lukewarm water, and the cooler the water, the less electricity the heat pump uses. Our Kita X, for 1,000 kWh of heat over a season, uses 178 kWh of electricity with water at 35 \u00b0C and 228 with water at 55 \u00b0C, the radiator temperature. Why is explained in the <a href=\"https:\/\/templari.com\/en\/news\/how-a-heat-pump-works\/\" rel=\"noreferrer\">article on how it works<\/a>.<\/p>\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\/pavimento-radiante-corrente-35-55-en.jpg\" class=\"lazyload\" alt=\"Kita X: electricity for 1,000 kWh of heat with underfloor heating and with radiators\" width=\"760\" height=\"468\" loading=\"lazy\"><noscript><img decoding=\"async\" src=\"https:\/\/templari.com\/wp-content\/uploads\/2026\/10\/pavimento-radiante-corrente-35-55-en.jpg\" alt=\"Kita X: electricity for 1,000 kWh of heat with underfloor heating and with radiators\" width=\"760\" height=\"468\" loading=\"lazy\"><\/noscript><figcaption>Kita X: electricity for 1,000 kWh of heat with underfloor heating and with radiators.<\/figcaption><\/figure>\n<h2>What temperature the water needs<\/h2>\n<p>Engineers often set the water at a fixed 35 \u00b0C, with a margin. But the floor is a mass of screed that stores heat, and much less is enough: in a home with underfloor heating that we follow, with electronics controlling by the rooms and the optimiser, the water runs at 23 \u00b0C in the morning and 27-28 \u00b0C in the evening. Running long and gently beats switching on and off. See the <a href=\"https:\/\/templari.com\/en\/news\/heat-pump-heating-curve-weather-compensation\/\" rel=\"noreferrer\">article on weather compensation<\/a> and the one <a href=\"https:\/\/templari.com\/en\/news\/heat-pump-energy-optimiser-thermal-storage\/\" rel=\"noreferrer\">on the optimiser<\/a>.<\/p>\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\/pavimento-radiante-temperatura-acqua-en.jpg\" class=\"lazyload\" alt=\"Water in the floor: a fixed 35 \u00b0C against 23-28 \u00b0C with room-based control\" width=\"760\" height=\"601\" loading=\"lazy\"><noscript><img decoding=\"async\" src=\"https:\/\/templari.com\/wp-content\/uploads\/2026\/10\/pavimento-radiante-temperatura-acqua-en.jpg\" alt=\"Water in the floor: a fixed 35 \u00b0C against 23-28 \u00b0C with room-based control\" width=\"760\" height=\"601\" loading=\"lazy\"><\/noscript><figcaption>Water in the floor: a fixed 35 \u00b0C against 23-28 \u00b0C with room-based control.<\/figcaption><\/figure>\n<h2>Rooms and circuits<\/h2>\n<p>Each room has its circuits on the manifold, and they must be balanced with the flow meters, as we explain in the <a href=\"https:\/\/templari.com\/en\/news\/how-to-balance-radiators-heat-pump\/\" rel=\"noreferrer\">article on balancing<\/a>. With our units the underfloor zone is driven by the Floor board of the HCC electronics, with mixing valve, modulating circulator and actuators, and room sensors tell the unit how much heat is needed. The whole system is in the <a href=\"https:\/\/templari.com\/en\/news\/heat-pump-controls-thermostats-underfloor-cooling\/\" rel=\"noreferrer\">article on system control<\/a>.<\/p>\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\/Componente-Scheda-FLOOR-HD.webp\" class=\"lazyload\" alt=\"The Floor board: mixing valve, circulator and actuators of an underfloor zone\" width=\"828\" height=\"612\" loading=\"lazy\" style=\"background:#eef0f3;border-radius:12px;padding:12px;box-sizing:border-box\"><noscript><img decoding=\"async\" src=\"https:\/\/templari.com\/wp-content\/uploads\/2026\/10\/Componente-Scheda-FLOOR-HD.webp\" alt=\"The Floor board: mixing valve, circulator and actuators of an underfloor zone\" width=\"828\" height=\"612\" loading=\"lazy\" style=\"background:#eef0f3;border-radius:12px;padding:12px;box-sizing:border-box\"><\/noscript><figcaption>The Floor board: mixing valve, circulator and actuators of an underfloor zone.<\/figcaption><\/figure>\n<h2>In summer the floor cools<\/h2>\n<p>In summer the same unit sends water at around 18 \u00b0C into the floor, above the dew point: the Kita X works at EER 4.88, against 3.21 with the 7 \u00b0C water of fan coils. The floor must not go below 19 \u00b0C and gives 45-50 W\/m\u00b2 of cooling, without blown air; for humidity a dehumidifier is needed. The full sum is in the <a href=\"https:\/\/templari.com\/en\/news\/heat-pump-cooling\/\" rel=\"noreferrer\">article on cooling<\/a>.<\/p>\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\/pavimento-radiante-estate-en.jpg\" class=\"lazyload\" alt=\"In summer: underfloor and fan coils compared\" width=\"760\" height=\"770\" loading=\"lazy\"><noscript><img decoding=\"async\" src=\"https:\/\/templari.com\/wp-content\/uploads\/2026\/10\/pavimento-radiante-estate-en.jpg\" alt=\"In summer: underfloor and fan coils compared\" width=\"760\" height=\"770\" loading=\"lazy\"><\/noscript><figcaption>In summer: underfloor and fan coils compared.<\/figcaption><\/figure>\n<h2>New build or renovation<\/h2>\n<p>In a new home underfloor heating and a heat pump are the most common choice. In a renovation it depends on how much depth can be removed; where the floor cannot be redone, the heat pump also works with radiators, as we explain in the <a href=\"https:\/\/templari.com\/en\/news\/heat-pump-with-radiators-does-it-work\/\" rel=\"noreferrer\">article on radiators<\/a>: ours reach 70 \u00b0C. The real limits are on the <a href=\"https:\/\/templari.com\/en\/heat-pump-pros-and-cons\/\" rel=\"noreferrer\">page on pros and cons<\/a>.<\/p>\n<h2>Which unit<\/h2>\n<p>For flats and small homes we offer the Kita X, a 7.5 and 9 kW propane monobloc; for larger homes our new propane heat pump. The output is calculated for the house. For an opinion, <a href=\"https:\/\/templari.com\/en\/contacts\/\" rel=\"noreferrer\">ask us for information<\/a>.<\/p>\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\/kita-x-pompa-di-calore-propano-monoblocco.jpg\" class=\"lazyload\" alt=\"The Kita X, our propane heat pump for the home\" width=\"1600\" height=\"1200\" loading=\"lazy\"><noscript><img decoding=\"async\" src=\"https:\/\/templari.com\/wp-content\/uploads\/2026\/10\/kita-x-pompa-di-calore-propano-monoblocco.jpg\" alt=\"The Kita X, our propane heat pump for the home\" width=\"1600\" height=\"1200\" loading=\"lazy\"><\/noscript><figcaption>The Kita X, our propane heat pump for the home.<\/figcaption><\/figure>\n<h2>Frequently asked questions<\/h2>\n<h3>Is underfloor heating good with a heat pump?<\/h3>\n<p>It is where a heat pump performs best: it works with lukewarm water. The Kita X uses 178 kWh of electricity for 1,000 kWh of heat with water at 35 \u00b0C and 228 with the 55 \u00b0C of radiators.<\/p>\n<h3>What water temperature for underfloor heating with a heat pump?<\/h3>\n<p>It is often set at a fixed 35 \u00b0C, but less is enough: in a home we follow, with room-based control, the water runs at 23 \u00b0C in the morning and 27-28 \u00b0C in the evening.<\/p>\n<h3>Can underfloor heating cool?<\/h3>\n<p>Yes, with water at around 18 \u00b0C above the dew point: the floor stays above 19 \u00b0C and gives 45-50 W\/m\u00b2. A dehumidifier is needed for humidity.<\/p>\n<h3>Should the heat pump be left on with underfloor heating?<\/h3>\n<p>It is better to let it run long and gently: the floor stores heat. Switching it on and off like a boiler makes it use more.<\/p>\n<h3>What if I cannot redo the floor?<\/h3>\n<p>The heat pump also works with radiators: ours reach 70 \u00b0C, and the water can often be much cooler.<\/p>\n<h3>Does underfloor heating need balancing?<\/h3>\n<p>Yes, circuit by circuit with the manifold flow meters: short circuits take more water than long ones.<\/p>\n<p class=\"tpl-vedi-anche\"><strong>See also:<\/strong> <a href=\"https:\/\/templari.com\/en\/news\/heat-pump-fan-coil\/\" rel=\"noreferrer\">Fan coils with a heat pump: when to choose them, what water temperature they need and how they cool<\/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<p><script type=\"application\/ld+json\">{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"Is underfloor heating good with a heat pump?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"It is where a heat pump performs best: it works with lukewarm water. 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radiante&#8221;&#8230;<\/p>\n","protected":false},"author":3,"featured_media":14058,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"_yoast_wpseo_focuskw":"heat pump underfloor heating","_yoast_wpseo_title":"Heat pump and underfloor heating | Templari","_yoast_wpseo_metadesc":"Heat pump underfloor heating: what water temperature it needs, how much it uses against radiators, how rooms are controlled and how it cools in summer.","_yoast_wpseo_meta-robots-noindex":"","footnotes":""},"class_list":["post-21387","page","type-page","status-publish","has-post-thumbnail"],"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 and underfloor heating | Templari<\/title>\n<meta name=\"description\" content=\"Heat pump underfloor heating: what water temperature it needs, how much it uses against radiators, how rooms are 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