{"id":66916,"date":"2026-02-24T16:16:03","date_gmt":"2026-02-24T15:16:03","guid":{"rendered":"https:\/\/www.idm-energie.at\/?page_id=66916"},"modified":"2026-07-06T15:41:24","modified_gmt":"2026-07-06T13:41:24","slug":"flow-temperature","status":"publish","type":"page","link":"https:\/\/www.idm-energie.at\/en\/heat-pump-efficiency\/flow-temperature\/","title":{"rendered":"Flow Temperature"},"content":{"rendered":"<p><div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-1 fusion-flex-container has-pattern-background has-mask-background nonhundred-percent-fullwidth non-hundred-percent-height-scrolling\" style=\"--awb-border-radius-top-left:0px;--awb-border-radius-top-right:0px;--awb-border-radius-bottom-right:0px;--awb-border-radius-bottom-left:0px;--awb-flex-wrap:wrap;\" ><div class=\"fusion-builder-row fusion-row fusion-flex-align-items-flex-start fusion-flex-content-wrap\" style=\"max-width:1185.6px;margin-left: calc(-4% \/ 2 );margin-right: calc(-4% \/ 2 );\"><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-0 fusion_builder_column_1_1 1_1 fusion-flex-column\" style=\"--awb-bg-size:cover;--awb-width-large:100%;--awb-margin-top-large:0px;--awb-spacing-right-large:1.92%;--awb-margin-bottom-large:20px;--awb-spacing-left-large:1.92%;--awb-width-medium:100%;--awb-order-medium:0;--awb-spacing-right-medium:1.92%;--awb-spacing-left-medium:1.92%;--awb-width-small:100%;--awb-order-small:0;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-justify-content-flex-start fusion-content-layout-column\"><nav class=\"fusion-breadcrumbs fusion-breadcrumbs-1\" style=\"--awb-margin-top:1%;--awb-breadcrumb-sep:&#039;\/&#039;;\" aria-label=\"Breadcrumb\"><nav aria-label=\"breadcrumbs\" class=\"rank-math-breadcrumb\"><p><span class=\"last\">Home<\/span><\/p><\/nav><\/nav><div class=\"fusion-title title fusion-title-1 fusion-sep-none fusion-title-center fusion-title-text fusion-title-size-one\" style=\"--awb-margin-top:3%;--awb-margin-bottom:3%;--awb-margin-top-small:10px;--awb-margin-right-small:0px;--awb-margin-bottom-small:10px;--awb-margin-left-small:0px;\"><h1 class=\"fusion-title-heading title-heading-center fusion-responsive-typography-calculated\" style=\"margin:0;--fontSize:42;line-height:1;\">Flow Temperature in Heat Pump Efficiency<\/h1><\/div><div class=\"fusion-text fusion-text-1\"><p>Flow temperature is one of the most important factors influencing heat pump efficiency.<\/p>\n<p>It describes the temperature of the heating water leaving the heat pump and flowing into the heat distribution system (such as underfloor heating or radiators). The higher this temperature, the harder the heat pump must work \u2014 and the lower the efficiency becomes.<\/p>\n<p>Understanding flow temperature is essential when evaluating seasonal performance, operating costs, and system design.<\/p>\n<\/div><\/div><\/div><\/div><\/div><div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-2 fusion-flex-container has-pattern-background has-mask-background nonhundred-percent-fullwidth non-hundred-percent-height-scrolling\" style=\"--awb-border-radius-top-left:0px;--awb-border-radius-top-right:0px;--awb-border-radius-bottom-right:0px;--awb-border-radius-bottom-left:0px;--awb-flex-wrap:wrap;\" ><div class=\"fusion-builder-row fusion-row fusion-flex-align-items-stretch fusion-flex-justify-content-center fusion-flex-content-wrap\" style=\"max-width:1185.6px;margin-left: calc(-4% \/ 2 );margin-right: calc(-4% \/ 2 );\"><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-1 fusion-flex-column\" style=\"--awb-padding-top:1%;--awb-padding-right:2%;--awb-padding-left:2%;--awb-overflow:hidden;--awb-bg-color:#fff042;--awb-bg-color-hover:#fff042;--awb-bg-size:cover;--awb-border-radius:16px 16px 16px 16px;--awb-width-large:800px;--awb-margin-top-large:0px;--awb-spacing-right-large:2%;--awb-margin-bottom-large:20px;--awb-spacing-left-large:2%;--awb-width-medium:100%;--awb-order-medium:0;--awb-spacing-right-medium:1.92%;--awb-spacing-left-medium:1.92%;--awb-width-small:100%;--awb-order-small:0;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;\" data-scroll-devices=\"small-visibility,medium-visibility,large-visibility\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-justify-content-flex-start fusion-content-layout-column\"><div class=\"fusion-title title fusion-title-2 fusion-sep-none fusion-title-center fusion-title-text fusion-title-size-paragraph blink-heading\" style=\"--awb-margin-top-small:10px;--awb-margin-right-small:0px;--awb-margin-bottom-small:10px;--awb-margin-left-small:0px;--awb-font-size:20px;\"><p class=\"fusion-title-heading title-heading-center title-heading-tag fusion-responsive-typography-calculated\" style=\"margin:0;text-transform:uppercase;font-size:1em;--fontSize:20;line-height:1.8;\"><strong>Configure your personalized heat pump system!<\/strong><\/p><\/div><div class=\"fusion-builder-row fusion-builder-row-inner fusion-row fusion-flex-align-items-stretch fusion-flex-justify-content-center fusion-flex-content-wrap\" style=\"--awb-flex-grow:0;--awb-flex-grow-medium:0;--awb-flex-grow-small:0;--awb-flex-shrink:0;--awb-flex-shrink-medium:0;--awb-flex-shrink-small:0;width:104% !important;max-width:104% !important;margin-left: calc(-4% \/ 2 );margin-right: calc(-4% \/ 2 );\"><div class=\"fusion-layout-column fusion_builder_column_inner fusion-builder-nested-column-0 fusion_builder_column_inner_1_1 1_1 fusion-flex-column\" style=\"--awb-bg-size:cover;--awb-width-large:100%;--awb-margin-top-large:0px;--awb-spacing-right-large:1.92%;--awb-margin-bottom-large:-5px;--awb-spacing-left-large:1.92%;--awb-width-medium:100%;--awb-order-medium:0;--awb-spacing-right-medium:1.92%;--awb-spacing-left-medium:1.92%;--awb-width-small:100%;--awb-order-small:0;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;\" data-scroll-devices=\"small-visibility,medium-visibility,large-visibility\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-justify-content-flex-start fusion-content-layout-column\"><div class=\"fusion-text fusion-text-2\" style=\"--awb-margin-left:2%;\"><p style=\"text-align: left;\">Plan your heat pump system with iDM Energiesysteme. Discover efficient heating, cooling, and hot water solutions for new buildings, renovations, and modern energy systems. Configure and personalize your iDM heat pump solution in just a few clicks.<\/p>\n<\/div><\/div><\/div><div class=\"fusion-layout-column fusion_builder_column_inner fusion-builder-nested-column-1 fusion_builder_column_inner_2_3 2_3 fusion-flex-column\" style=\"--awb-bg-size:cover;--awb-width-large:66.666666666667%;--awb-margin-top-large:0px;--awb-spacing-right-large:2.88%;--awb-margin-bottom-large:20px;--awb-spacing-left-large:2.88%;--awb-width-medium:100%;--awb-order-medium:0;--awb-spacing-right-medium:1.92%;--awb-spacing-left-medium:1.92%;--awb-width-small:100%;--awb-order-small:0;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;\" data-scroll-devices=\"small-visibility,medium-visibility,large-visibility\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-justify-content-flex-start fusion-content-layout-column\"><div class=\"fusion-text fusion-text-3\"><div style=\"display: flex; align-items: center; gap: 15px; flex-wrap: wrap;\">\n<div style=\"display: flex;\"><img decoding=\"async\" width=\"150\" height=\"150\" class=\"size-thumbnail wp-image-73518 aligncenter\" style=\"width: 50px; height: 50px; border-radius: 50%; border: 2px solid #000000;\" src=\"https:\/\/www.idm-energie.at\/wp-content\/uploads\/2026\/07\/thomas-portrait-150x150.jpg\" alt=\"Thomas Pletzer\" srcset=\"https:\/\/www.idm-energie.at\/wp-content\/uploads\/2026\/07\/thomas-portrait-66x66.jpg 66w, https:\/\/www.idm-energie.at\/wp-content\/uploads\/2026\/07\/thomas-portrait-150x150.jpg 150w\" sizes=\"(max-width: 150px) 100vw, 150px\" \/><br \/>\n<img decoding=\"async\" width=\"150\" height=\"150\" class=\"size-thumbnail wp-image-73509 aligncenter\" style=\"width: 50px; height: 50px; border-radius: 50%; border: 2px solid #000000;\" src=\"https:\/\/www.idm-energie.at\/wp-content\/uploads\/2026\/07\/matthias-portrait-150x150.jpg\" alt=\"Matthias Steiner\" srcset=\"https:\/\/www.idm-energie.at\/wp-content\/uploads\/2026\/07\/matthias-portrait-66x66.jpg 66w, https:\/\/www.idm-energie.at\/wp-content\/uploads\/2026\/07\/matthias-portrait-150x150.jpg 150w\" sizes=\"(max-width: 150px) 100vw, 150px\" \/><br \/>\n<img decoding=\"async\" width=\"150\" height=\"150\" class=\"size-thumbnail wp-image-73500 aligncenter\" style=\"width: 50px; height: 50px; border-radius: 50%; border: 2px solid #000000;\" src=\"https:\/\/www.idm-energie.at\/wp-content\/uploads\/2026\/07\/christian-hutter-portrait-150x150.jpg\" alt=\"Christian Hutter\" srcset=\"https:\/\/www.idm-energie.at\/wp-content\/uploads\/2026\/07\/christian-hutter-portrait-66x66.jpg 66w, https:\/\/www.idm-energie.at\/wp-content\/uploads\/2026\/07\/christian-hutter-portrait-150x150.jpg 150w\" sizes=\"(max-width: 150px) 100vw, 150px\" \/><br \/>\n<img decoding=\"async\" width=\"150\" height=\"150\" class=\"size-thumbnail wp-image-73491 aligncenter\" style=\"width: 50px; height: 50px; border-radius: 50%; border: 2px solid #000000;\" src=\"https:\/\/www.idm-energie.at\/wp-content\/uploads\/2026\/07\/adrian-portrait-150x150.jpg\" alt=\"Adrian Egger\" srcset=\"https:\/\/www.idm-energie.at\/wp-content\/uploads\/2026\/07\/adrian-portrait-66x66.jpg 66w, https:\/\/www.idm-energie.at\/wp-content\/uploads\/2026\/07\/adrian-portrait-150x150.jpg 150w\" sizes=\"(max-width: 150px) 100vw, 150px\" \/><\/div>\n<div style=\"color: #000000; line-height: 0.7; margin-left: 2%;\"><strong style=\"display: block;\">CONNECT WITH OUR EXPERTS<\/strong><br \/>\n<span style=\"opacity: 0.8;\">50+ Years of Heat Pumps Experience<\/span><\/div>\n<\/div>\n<\/div><\/div><\/div><div class=\"fusion-layout-column fusion_builder_column_inner fusion-builder-nested-column-2 fusion_builder_column_inner_1_3 1_3 fusion-flex-column fusion-flex-align-self-center\" style=\"--awb-bg-size:cover;--awb-width-large:33.333333333333%;--awb-margin-top-large:0px;--awb-spacing-right-large:5.76%;--awb-margin-bottom-large:20px;--awb-spacing-left-large:5.76%;--awb-width-medium:100%;--awb-order-medium:0;--awb-spacing-right-medium:1.92%;--awb-spacing-left-medium:1.92%;--awb-width-small:100%;--awb-order-small:0;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;\" data-scroll-devices=\"small-visibility,medium-visibility,large-visibility\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-justify-content-center fusion-content-layout-column\"><div style=\"text-align:center;\"><a class=\"fusion-button button-flat fusion-button-default-size button-default fusion-button-default button-1 fusion-button-default-span fusion-button-default-type\" target=\"_self\" href=\"https:\/\/konfigurator.myidm.at\/#\/?lang=EN\" rel=\"noopener\"><span class=\"fusion-button-text awb-button__text awb-button__text--default\">Configure Now!<\/span><\/a><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-3 fusion-flex-container has-pattern-background has-mask-background nonhundred-percent-fullwidth non-hundred-percent-height-scrolling\" style=\"--awb-border-radius-top-left:0px;--awb-border-radius-top-right:0px;--awb-border-radius-bottom-right:0px;--awb-border-radius-bottom-left:0px;--awb-flex-wrap:wrap;\" ><div class=\"fusion-builder-row fusion-row fusion-flex-align-items-flex-start fusion-flex-content-wrap\" style=\"max-width:1185.6px;margin-left: calc(-4% \/ 2 );margin-right: calc(-4% \/ 2 );\"><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-2 fusion_builder_column_1_1 1_1 fusion-flex-column\" style=\"--awb-bg-size:cover;--awb-width-large:100%;--awb-margin-top-large:0px;--awb-spacing-right-large:1.92%;--awb-margin-bottom-large:20px;--awb-spacing-left-large:1.92%;--awb-width-medium:100%;--awb-order-medium:0;--awb-spacing-right-medium:1.92%;--awb-spacing-left-medium:1.92%;--awb-width-small:100%;--awb-order-small:0;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-justify-content-flex-start fusion-content-layout-column\"><div class=\"fusion-text fusion-text-4\">\n<\/div><div class=\"fusion-text fusion-text-5\"><div id=\"ez-toc-container\" class=\"ez-toc-v2_0_87 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.idm-energie.at\/en\/heat-pump-efficiency\/flow-temperature\/#What_Is_Flow_Temperature\" >What Is Flow Temperature?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.idm-energie.at\/en\/heat-pump-efficiency\/flow-temperature\/#Why_Flow_Temperature_Affects_Efficiency\" >Why Flow Temperature Affects Efficiency<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.idm-energie.at\/en\/heat-pump-efficiency\/flow-temperature\/#Flow_Temperature_and_COP\" >Flow Temperature and COP<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.idm-energie.at\/en\/heat-pump-efficiency\/flow-temperature\/#Flow_Temperature_and_Seasonal_Efficiency\" >Flow Temperature and Seasonal Efficiency<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.idm-energie.at\/en\/heat-pump-efficiency\/flow-temperature\/#Typical_Flow_Temperatures_by_Heat_Emitter_Type\" >Typical Flow Temperatures by Heat Emitter Type<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.idm-energie.at\/en\/heat-pump-efficiency\/flow-temperature\/#What_Determines_Required_Flow_Temperature\" >What Determines Required Flow Temperature?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.idm-energie.at\/en\/heat-pump-efficiency\/flow-temperature\/#Flow_Temperature_and_System_Optimization\" >Flow Temperature and System Optimization<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.idm-energie.at\/en\/heat-pump-efficiency\/flow-temperature\/#Common_Misunderstanding\" >Common Misunderstanding<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.idm-energie.at\/en\/heat-pump-efficiency\/flow-temperature\/#Practical_Takeaway\" >Practical Takeaway<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.idm-energie.at\/en\/heat-pump-efficiency\/flow-temperature\/#Frequently_Asked_Questions_FAQs\" >Frequently Asked Questions (FAQs)<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"What_Is_Flow_Temperature\"><\/span>What Is Flow Temperature?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Flow temperature (also called supply temperature) is the temperature of the water delivered from the heat pump to the heating system.<\/p>\n<p>It is usually expressed in degrees Celsius (\u00b0C). Typical ranges include:<\/p>\n<ul>\n<li>Around 30\u201335\u00b0C for underfloor heating<\/li>\n<li>Around 40\u201345\u00b0C for low-temperature radiators<\/li>\n<li>50\u00b0C or higher for conventional high-temperature radiator systems<\/li>\n<\/ul>\n<p>The required flow temperature depends on the building\u2019s heat demand and emitter design.<\/p>\n<\/div><div class=\"fusion-image-element\" style=\"text-align:center;--awb-margin-top:2%;--awb-margin-bottom:2%;--awb-caption-title-font-family:var(--h2_typography-font-family);--awb-caption-title-font-weight:var(--h2_typography-font-weight);--awb-caption-title-font-style:var(--h2_typography-font-style);--awb-caption-title-size:var(--h2_typography-font-size);--awb-caption-title-transform:var(--h2_typography-text-transform);--awb-caption-title-line-height:var(--h2_typography-line-height);--awb-caption-title-letter-spacing:var(--h2_typography-letter-spacing);\"><span class=\" fusion-imageframe imageframe-none imageframe-1 hover-type-none\" style=\"border:3px solid #333333;\"><img decoding=\"async\" width=\"1024\" height=\"559\" alt=\"flow temperature as a factor in heat pump efficiency\" title=\"flow-temperature\" src=\"https:\/\/www.idm-energie.at\/wp-content\/uploads\/2026\/02\/flow-temperature-1024x559.webp\" class=\"img-responsive wp-image-66931\" srcset=\"https:\/\/www.idm-energie.at\/wp-content\/uploads\/2026\/02\/flow-temperature-200x109.webp 200w, https:\/\/www.idm-energie.at\/wp-content\/uploads\/2026\/02\/flow-temperature-400x218.webp 400w, https:\/\/www.idm-energie.at\/wp-content\/uploads\/2026\/02\/flow-temperature-600x327.webp 600w, https:\/\/www.idm-energie.at\/wp-content\/uploads\/2026\/02\/flow-temperature-800x436.webp 800w, https:\/\/www.idm-energie.at\/wp-content\/uploads\/2026\/02\/flow-temperature-1200x655.webp 1200w\" sizes=\"(max-width: 1024px) 100vw, (max-width: 640px) 100vw, 1200px\" \/><\/span><\/div><div class=\"fusion-text fusion-text-6\"><h2><span class=\"ez-toc-section\" id=\"Why_Flow_Temperature_Affects_Efficiency\"><\/span>Why Flow Temperature Affects Efficiency<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Heat pumps do not generate heat through combustion. They transfer heat from a low-temperature source (air, ground, or water) to a higher temperature level.<\/p>\n<p>The larger the temperature difference between:<\/p>\n<ul>\n<li>Heat source temperature (e.g., outdoor air)<\/li>\n<li>Required flow temperature<\/li>\n<\/ul>\n<p>the more electrical energy is required.<\/p>\n<p>This temperature difference is called the temperature lift.<\/p>\n<p>Higher temperature lift \u2192 Lower COP \u2192 Lower seasonal efficiency.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Flow_Temperature_and_COP\"><\/span>Flow Temperature and COP<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Under standardized testing according to EN 14511, efficiency values are measured at defined combinations such as:<\/p>\n<ul>\n<li>A7\/W35<\/li>\n<li>A2\/W35<\/li>\n<\/ul>\n<p>The \u201cW35\u201d represents a 35\u00b0C flow temperature.<\/p>\n<p>If the same heat pump were tested at 55\u00b0C flow temperature instead of 35\u00b0C, the COP would be significantly lower.<\/p>\n<p>This is why flow temperature is one of the strongest technical drivers of efficiency.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Flow_Temperature_and_Seasonal_Efficiency\"><\/span>Flow Temperature and Seasonal Efficiency<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Seasonal metrics such as SCOP are calculated according to EN 14825, which uses multiple temperature bins and part-load data.<\/p>\n<p>Lower design flow temperatures generally result in:<\/p>\n<ul>\n<li>Higher SCOP values<\/li>\n<li>Higher seasonal space heating energy efficiency (\u03b7s)<\/li>\n<li>Lower electricity consumption over the heating season<\/li>\n<\/ul>\n<p>Therefore, system design directly influences seasonal performance.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Typical_Flow_Temperatures_by_Heat_Emitter_Type\"><\/span>Typical Flow Temperatures by Heat Emitter Type<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3>Underfloor Heating<\/h3>\n<ul>\n<li>Large surface area<\/li>\n<li>Low operating temperature<\/li>\n<li>Typically 30\u201335\u00b0C<\/li>\n<li>Very suitable for heat pumps<\/li>\n<\/ul>\n<h3>Low-Temperature Radiators<\/h3>\n<ul>\n<li>Larger radiator surface than conventional systems<\/li>\n<li>Typically 40\u201345\u00b0C<\/li>\n<li>Moderate efficiency impact<\/li>\n<\/ul>\n<h3>Conventional Radiators<\/h3>\n<ul>\n<li>Smaller heat emission area<\/li>\n<li>Often require 50\u201360\u00b0C<\/li>\n<li>Lower heat pump efficiency<\/li>\n<\/ul>\n<p>The lower the required flow temperature, the better the seasonal efficiency.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"What_Determines_Required_Flow_Temperature\"><\/span>What Determines Required Flow Temperature?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Flow temperature is influenced by:<\/p>\n<ul>\n<li>Building heat load<\/li>\n<li>Insulation level<\/li>\n<li>Emitter surface area<\/li>\n<li>Outdoor temperature<\/li>\n<li>Control strategy (weather-compensated control)<\/li>\n<\/ul>\n<p>In well-insulated buildings, lower flow temperatures are often sufficient to maintain comfort.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Flow_Temperature_and_System_Optimization\"><\/span>Flow Temperature and System Optimization<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Modern heat pump systems use weather-compensated control, which adjusts flow temperature based on outdoor temperature.<\/p>\n<p>For example:<\/p>\n<ul>\n<li>Mild weather \u2192 lower flow temperature<\/li>\n<li>Cold weather \u2192 higher flow temperature<\/li>\n<\/ul>\n<p>This dynamic adjustment improves seasonal efficiency and reduces unnecessary electrical consumption.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Common_Misunderstanding\"><\/span>Common Misunderstanding<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Higher flow temperature does not mean better comfort.<\/p>\n<p>Comfort depends on:<\/p>\n<ul>\n<li>Correct heat load calculation<\/li>\n<li>Proper emitter sizing<\/li>\n<li>Stable room temperature control<\/li>\n<\/ul>\n<p>Oversized flow temperatures increase electricity consumption without improving comfort.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Practical_Takeaway\"><\/span>Practical Takeaway<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Flow temperature is one of the most influential system parameters in heat pump efficiency.<\/p>\n<p>Lower flow temperature generally leads to:<\/p>\n<ul>\n<li>Higher COP<\/li>\n<li>Higher SCOP<\/li>\n<li>Lower operating costs<\/li>\n<li>Improved seasonal performance<\/li>\n<\/ul>\n<p>When evaluating heat pump efficiency, always consider the required heating system temperature \u2014 not just the rated efficiency value.<\/p>\n<\/div><\/div><\/div><\/div><\/div><div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-4 fusion-flex-container has-pattern-background has-mask-background nonhundred-percent-fullwidth non-hundred-percent-height-scrolling\" style=\"--awb-border-radius-top-left:0px;--awb-border-radius-top-right:0px;--awb-border-radius-bottom-right:0px;--awb-border-radius-bottom-left:0px;--awb-flex-wrap:wrap;\" ><div class=\"fusion-builder-row fusion-row fusion-flex-align-items-stretch fusion-flex-justify-content-center fusion-flex-content-wrap\" style=\"max-width:1185.6px;margin-left: calc(-4% \/ 2 );margin-right: calc(-4% \/ 2 );\"><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-3 fusion-flex-column\" style=\"--awb-padding-top:1%;--awb-padding-right:2%;--awb-padding-left:2%;--awb-overflow:hidden;--awb-bg-color:#fff042;--awb-bg-color-hover:#fff042;--awb-bg-size:cover;--awb-border-radius:16px 16px 16px 16px;--awb-width-large:800px;--awb-margin-top-large:0px;--awb-spacing-right-large:2%;--awb-margin-bottom-large:20px;--awb-spacing-left-large:2%;--awb-width-medium:100%;--awb-order-medium:0;--awb-spacing-right-medium:1.92%;--awb-spacing-left-medium:1.92%;--awb-width-small:100%;--awb-order-small:0;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;\" data-scroll-devices=\"small-visibility,medium-visibility,large-visibility\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-justify-content-flex-start fusion-content-layout-column\"><div class=\"fusion-title title fusion-title-3 fusion-sep-none fusion-title-center fusion-title-text fusion-title-size-paragraph blink-heading\" style=\"--awb-margin-top-small:10px;--awb-margin-right-small:0px;--awb-margin-bottom-small:10px;--awb-margin-left-small:0px;--awb-font-size:20px;\"><p class=\"fusion-title-heading title-heading-center title-heading-tag fusion-responsive-typography-calculated\" style=\"margin:0;text-transform:uppercase;font-size:1em;--fontSize:20;line-height:1.8;\"><strong>Configure your personalized heat pump system!<\/strong><\/p><\/div><div class=\"fusion-builder-row fusion-builder-row-inner fusion-row fusion-flex-align-items-stretch fusion-flex-justify-content-center fusion-flex-content-wrap\" style=\"--awb-flex-grow:0;--awb-flex-grow-medium:0;--awb-flex-grow-small:0;--awb-flex-shrink:0;--awb-flex-shrink-medium:0;--awb-flex-shrink-small:0;width:104% !important;max-width:104% !important;margin-left: calc(-4% \/ 2 );margin-right: calc(-4% \/ 2 );\"><div class=\"fusion-layout-column fusion_builder_column_inner fusion-builder-nested-column-3 fusion_builder_column_inner_1_1 1_1 fusion-flex-column\" style=\"--awb-bg-size:cover;--awb-width-large:100%;--awb-margin-top-large:0px;--awb-spacing-right-large:1.92%;--awb-margin-bottom-large:-5px;--awb-spacing-left-large:1.92%;--awb-width-medium:100%;--awb-order-medium:0;--awb-spacing-right-medium:1.92%;--awb-spacing-left-medium:1.92%;--awb-width-small:100%;--awb-order-small:0;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;\" data-scroll-devices=\"small-visibility,medium-visibility,large-visibility\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-justify-content-flex-start fusion-content-layout-column\"><div class=\"fusion-text fusion-text-7\" style=\"--awb-margin-left:2%;\"><p style=\"text-align: left;\">Plan your heat pump system with iDM Energiesysteme. Discover efficient heating, cooling, and hot water solutions for new buildings, renovations, and modern energy systems. Configure and personalize your iDM heat pump solution in just a few clicks.<\/p>\n<\/div><\/div><\/div><div class=\"fusion-layout-column fusion_builder_column_inner fusion-builder-nested-column-4 fusion_builder_column_inner_2_3 2_3 fusion-flex-column\" style=\"--awb-bg-size:cover;--awb-width-large:66.666666666667%;--awb-margin-top-large:0px;--awb-spacing-right-large:2.88%;--awb-margin-bottom-large:20px;--awb-spacing-left-large:2.88%;--awb-width-medium:100%;--awb-order-medium:0;--awb-spacing-right-medium:1.92%;--awb-spacing-left-medium:1.92%;--awb-width-small:100%;--awb-order-small:0;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;\" data-scroll-devices=\"small-visibility,medium-visibility,large-visibility\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-justify-content-flex-start fusion-content-layout-column\"><div class=\"fusion-text fusion-text-8\"><div style=\"display: flex; align-items: center; gap: 15px; flex-wrap: wrap;\">\n<div style=\"display: flex;\"><img decoding=\"async\" width=\"150\" height=\"150\" class=\"size-thumbnail wp-image-73518 aligncenter\" style=\"width: 50px; height: 50px; border-radius: 50%; border: 2px solid #000000;\" src=\"https:\/\/www.idm-energie.at\/wp-content\/uploads\/2026\/07\/thomas-portrait-150x150.jpg\" alt=\"Thomas Pletzer\" srcset=\"https:\/\/www.idm-energie.at\/wp-content\/uploads\/2026\/07\/thomas-portrait-66x66.jpg 66w, https:\/\/www.idm-energie.at\/wp-content\/uploads\/2026\/07\/thomas-portrait-150x150.jpg 150w\" sizes=\"(max-width: 150px) 100vw, 150px\" \/><br \/>\n<img decoding=\"async\" width=\"150\" height=\"150\" class=\"size-thumbnail wp-image-73509 aligncenter\" style=\"width: 50px; height: 50px; border-radius: 50%; border: 2px solid #000000;\" src=\"https:\/\/www.idm-energie.at\/wp-content\/uploads\/2026\/07\/matthias-portrait-150x150.jpg\" alt=\"Matthias Steiner\" srcset=\"https:\/\/www.idm-energie.at\/wp-content\/uploads\/2026\/07\/matthias-portrait-66x66.jpg 66w, https:\/\/www.idm-energie.at\/wp-content\/uploads\/2026\/07\/matthias-portrait-150x150.jpg 150w\" sizes=\"(max-width: 150px) 100vw, 150px\" \/><br \/>\n<img decoding=\"async\" width=\"150\" height=\"150\" class=\"size-thumbnail wp-image-73500 aligncenter\" style=\"width: 50px; height: 50px; border-radius: 50%; border: 2px solid #000000;\" src=\"https:\/\/www.idm-energie.at\/wp-content\/uploads\/2026\/07\/christian-hutter-portrait-150x150.jpg\" alt=\"Christian Hutter\" srcset=\"https:\/\/www.idm-energie.at\/wp-content\/uploads\/2026\/07\/christian-hutter-portrait-66x66.jpg 66w, https:\/\/www.idm-energie.at\/wp-content\/uploads\/2026\/07\/christian-hutter-portrait-150x150.jpg 150w\" sizes=\"(max-width: 150px) 100vw, 150px\" \/><br \/>\n<img decoding=\"async\" width=\"150\" height=\"150\" class=\"size-thumbnail wp-image-73491 aligncenter\" style=\"width: 50px; height: 50px; border-radius: 50%; border: 2px solid #000000;\" src=\"https:\/\/www.idm-energie.at\/wp-content\/uploads\/2026\/07\/adrian-portrait-150x150.jpg\" alt=\"Adrian Egger\" srcset=\"https:\/\/www.idm-energie.at\/wp-content\/uploads\/2026\/07\/adrian-portrait-66x66.jpg 66w, https:\/\/www.idm-energie.at\/wp-content\/uploads\/2026\/07\/adrian-portrait-150x150.jpg 150w\" sizes=\"(max-width: 150px) 100vw, 150px\" \/><\/div>\n<div style=\"color: #000000; line-height: 0.7; margin-left: 2%;\"><strong style=\"display: block;\">CONNECT WITH OUR EXPERTS<\/strong><br \/>\n<span style=\"opacity: 0.8;\">50+ Years of Heat Pumps Experience<\/span><\/div>\n<\/div>\n<\/div><\/div><\/div><div class=\"fusion-layout-column fusion_builder_column_inner fusion-builder-nested-column-5 fusion_builder_column_inner_1_3 1_3 fusion-flex-column fusion-flex-align-self-center\" style=\"--awb-bg-size:cover;--awb-width-large:33.333333333333%;--awb-margin-top-large:0px;--awb-spacing-right-large:5.76%;--awb-margin-bottom-large:20px;--awb-spacing-left-large:5.76%;--awb-width-medium:100%;--awb-order-medium:0;--awb-spacing-right-medium:1.92%;--awb-spacing-left-medium:1.92%;--awb-width-small:100%;--awb-order-small:0;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;\" data-scroll-devices=\"small-visibility,medium-visibility,large-visibility\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-justify-content-center fusion-content-layout-column\"><div style=\"text-align:center;\"><a class=\"fusion-button button-flat fusion-button-default-size button-default fusion-button-default button-2 fusion-button-default-span fusion-button-default-type\" target=\"_self\" href=\"https:\/\/konfigurator.myidm.at\/#\/?lang=EN\" rel=\"noopener\"><span class=\"fusion-button-text awb-button__text awb-button__text--default\">Configure Now!<\/span><\/a><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-5 fusion-flex-container has-pattern-background has-mask-background nonhundred-percent-fullwidth non-hundred-percent-height-scrolling\" style=\"--awb-border-radius-top-left:0px;--awb-border-radius-top-right:0px;--awb-border-radius-bottom-right:0px;--awb-border-radius-bottom-left:0px;--awb-flex-wrap:wrap;\" ><div class=\"fusion-builder-row fusion-row fusion-flex-align-items-flex-start fusion-flex-content-wrap\" style=\"max-width:1185.6px;margin-left: calc(-4% \/ 2 );margin-right: calc(-4% \/ 2 );\"><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-4 fusion_builder_column_1_1 1_1 fusion-flex-column\" style=\"--awb-bg-size:cover;--awb-width-large:100%;--awb-margin-top-large:0px;--awb-spacing-right-large:1.92%;--awb-margin-bottom-large:20px;--awb-spacing-left-large:1.92%;--awb-width-medium:100%;--awb-order-medium:0;--awb-spacing-right-medium:1.92%;--awb-spacing-left-medium:1.92%;--awb-width-small:100%;--awb-order-small:0;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-justify-content-flex-start fusion-content-layout-column\"><div class=\"fusion-text fusion-text-9 fusion-text-no-margin\" style=\"--awb-margin-bottom:5px;\"><h2><span class=\"ez-toc-section\" id=\"Frequently_Asked_Questions_FAQs\"><\/span>Frequently Asked Questions (FAQs)<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<\/div><div class=\"accordian fusion-accordian\" style=\"--awb-border-size:1px;--awb-icon-size:16px;--awb-content-font-size:15px;--awb-icon-alignment:right;--awb-hover-color:#f9f9fb;--awb-border-color:#e2e2e2;--awb-background-color:#ffffff;--awb-divider-color:#e2e2e2;--awb-divider-hover-color:#e2e2e2;--awb-icon-color:#009fe3;--awb-title-color:#212934;--awb-content-color:#3f3f3f;--awb-icon-box-color:#212934;--awb-toggle-hover-accent-color:#009fe3;--awb-title-font-family:&quot;Aller&quot;;--awb-title-font-weight:700;--awb-title-font-style:normal;--awb-title-font-size:18px;--awb-content-font-family:&quot;Aller&quot;;--awb-content-font-style:normal;--awb-content-font-weight:400;\"><div class=\"panel-group fusion-toggle-icon-right fusion-toggle-icon-unboxed\" id=\"accordion-66916-1\"><div class=\"fusion-panel panel-default panel-1ed18363513b7642a fusion-toggle-no-divider fusion-toggle-boxed-mode\" style=\"--awb-title-color:#212934;--awb-content-color:#3f3f3f;\"><div class=\"panel-heading\"><h4 class=\"panel-title toggle\" id=\"toggle_1ed18363513b7642a\"><a aria-expanded=\"false\" aria-controls=\"1ed18363513b7642a\" role=\"button\" data-toggle=\"collapse\" data-parent=\"#accordion-66916-1\" data-target=\"#1ed18363513b7642a\" href=\"#1ed18363513b7642a\"><span class=\"fusion-toggle-icon-wrapper\" aria-hidden=\"true\"><i class=\"fa-fusion-box active-icon awb-icon-minus\" aria-hidden=\"true\"><\/i><i class=\"fa-fusion-box inactive-icon awb-icon-plus\" aria-hidden=\"true\"><\/i><\/span><span class=\"fusion-toggle-heading\">1. What is flow temperature in a heat pump system?<\/span><\/a><\/h4><\/div><div id=\"1ed18363513b7642a\" class=\"panel-collapse collapse \" aria-labelledby=\"toggle_1ed18363513b7642a\"><div class=\"panel-body toggle-content fusion-clearfix\">\n<p>Flow temperature is the temperature of the heating water leaving the heat pump and entering the heat distribution system.<\/p>\n<p>It determines how warm the supplied water must be to heat the building. Lower flow temperatures generally improve heat pump efficiency.<\/p>\n<\/div><\/div><\/div><div class=\"fusion-panel panel-default panel-2eceadc2efc88b50d fusion-toggle-no-divider fusion-toggle-boxed-mode\" style=\"--awb-title-color:#212934;--awb-content-color:#3f3f3f;\"><div class=\"panel-heading\"><h4 class=\"panel-title toggle\" id=\"toggle_2eceadc2efc88b50d\"><a aria-expanded=\"false\" aria-controls=\"2eceadc2efc88b50d\" role=\"button\" data-toggle=\"collapse\" data-parent=\"#accordion-66916-1\" data-target=\"#2eceadc2efc88b50d\" href=\"#2eceadc2efc88b50d\"><span class=\"fusion-toggle-icon-wrapper\" aria-hidden=\"true\"><i class=\"fa-fusion-box active-icon awb-icon-minus\" aria-hidden=\"true\"><\/i><i class=\"fa-fusion-box inactive-icon awb-icon-plus\" aria-hidden=\"true\"><\/i><\/span><span class=\"fusion-toggle-heading\">2. Why does flow temperature affect heat pump efficiency?<\/span><\/a><\/h4><\/div><div id=\"2eceadc2efc88b50d\" class=\"panel-collapse collapse \" aria-labelledby=\"toggle_2eceadc2efc88b50d\"><div class=\"panel-body toggle-content fusion-clearfix\">\n<p>Heat pumps transfer heat from a lower-temperature source (such as outdoor air or ground) to a higher temperature level.<\/p>\n<p>The greater the temperature difference between the heat source and the required flow temperature, the more electrical energy the system needs.<\/p>\n<p>Higher flow temperature increases the temperature lift, which reduces COP and seasonal efficiency.<\/p>\n<\/div><\/div><\/div><div class=\"fusion-panel panel-default panel-95f933c735293b5c8 fusion-toggle-no-divider fusion-toggle-boxed-mode\" style=\"--awb-title-color:#212934;--awb-content-color:#3f3f3f;\"><div class=\"panel-heading\"><h4 class=\"panel-title toggle\" id=\"toggle_95f933c735293b5c8\"><a aria-expanded=\"false\" aria-controls=\"95f933c735293b5c8\" role=\"button\" data-toggle=\"collapse\" data-parent=\"#accordion-66916-1\" data-target=\"#95f933c735293b5c8\" href=\"#95f933c735293b5c8\"><span class=\"fusion-toggle-icon-wrapper\" aria-hidden=\"true\"><i class=\"fa-fusion-box active-icon awb-icon-minus\" aria-hidden=\"true\"><\/i><i class=\"fa-fusion-box inactive-icon awb-icon-plus\" aria-hidden=\"true\"><\/i><\/span><span class=\"fusion-toggle-heading\">3. What is a typical flow temperature for heat pumps?<\/span><\/a><\/h4><\/div><div id=\"95f933c735293b5c8\" class=\"panel-collapse collapse \" aria-labelledby=\"toggle_95f933c735293b5c8\"><div class=\"panel-body toggle-content fusion-clearfix\">\n<p data-start=\"1056\" data-end=\"1114\">Typical flow temperatures depend on the heat emitter type:<\/p>\n<ul data-start=\"1116\" data-end=\"1259\">\n<li data-start=\"1116\" data-end=\"1157\">\n<p data-start=\"1118\" data-end=\"1157\">Around 30\u201335\u00b0C for underfloor heating<\/p>\n<\/li>\n<li data-start=\"1158\" data-end=\"1206\">\n<p data-start=\"1160\" data-end=\"1206\">Around 40\u201345\u00b0C for low-temperature radiators<\/p>\n<\/li>\n<li data-start=\"1207\" data-end=\"1259\">\n<p data-start=\"1209\" data-end=\"1259\">50\u00b0C or higher for conventional radiator systems<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"1261\" data-end=\"1331\">Lower flow temperatures generally support higher seasonal performance.<\/p>\n<\/div><\/div><\/div><div class=\"fusion-panel panel-default panel-39b7fca4948ddbd78 fusion-toggle-no-divider fusion-toggle-boxed-mode\" style=\"--awb-title-color:#212934;--awb-content-color:#3f3f3f;\"><div class=\"panel-heading\"><h4 class=\"panel-title toggle\" id=\"toggle_39b7fca4948ddbd78\"><a aria-expanded=\"false\" aria-controls=\"39b7fca4948ddbd78\" role=\"button\" data-toggle=\"collapse\" data-parent=\"#accordion-66916-1\" data-target=\"#39b7fca4948ddbd78\" href=\"#39b7fca4948ddbd78\"><span class=\"fusion-toggle-icon-wrapper\" aria-hidden=\"true\"><i class=\"fa-fusion-box active-icon awb-icon-minus\" aria-hidden=\"true\"><\/i><i class=\"fa-fusion-box inactive-icon awb-icon-plus\" aria-hidden=\"true\"><\/i><\/span><span class=\"fusion-toggle-heading\">4. Is lower flow temperature always better?<\/span><\/a><\/h4><\/div><div id=\"39b7fca4948ddbd78\" class=\"panel-collapse collapse \" aria-labelledby=\"toggle_39b7fca4948ddbd78\"><div class=\"panel-body toggle-content fusion-clearfix\">\n<p data-start=\"1387\" data-end=\"1479\">From an efficiency perspective, yes \u2014 lower flow temperature improves heat pump performance.<\/p>\n<p data-start=\"1481\" data-end=\"1635\">However, the flow temperature must still be high enough to meet the building\u2019s heat demand. Proper heat load calculation and emitter sizing are essential.<\/p>\n<p data-start=\"1637\" data-end=\"1686\">Efficiency should not compromise thermal comfort.<\/p>\n<\/div><\/div><\/div><div class=\"fusion-panel panel-default panel-52811407258a699b9 fusion-toggle-no-divider fusion-toggle-boxed-mode\" style=\"--awb-title-color:#212934;--awb-content-color:#3f3f3f;\"><div class=\"panel-heading\"><h4 class=\"panel-title toggle\" id=\"toggle_52811407258a699b9\"><a aria-expanded=\"false\" aria-controls=\"52811407258a699b9\" role=\"button\" data-toggle=\"collapse\" data-parent=\"#accordion-66916-1\" data-target=\"#52811407258a699b9\" href=\"#52811407258a699b9\"><span class=\"fusion-toggle-icon-wrapper\" aria-hidden=\"true\"><i class=\"fa-fusion-box active-icon awb-icon-minus\" aria-hidden=\"true\"><\/i><i class=\"fa-fusion-box inactive-icon awb-icon-plus\" aria-hidden=\"true\"><\/i><\/span><span class=\"fusion-toggle-heading\">5. How is flow temperature considered in standardized testing?<\/span><\/a><\/h4><\/div><div id=\"52811407258a699b9\" class=\"panel-collapse collapse \" aria-labelledby=\"toggle_52811407258a699b9\"><div class=\"panel-body toggle-content fusion-clearfix\">\n<p data-start=\"1761\" data-end=\"1942\">Under <strong data-start=\"1767\" data-end=\"1808\"><span class=\"hover:entity-accent entity-underline inline cursor-pointer align-baseline\"><span class=\"whitespace-normal\">EN 14511<\/span><\/span><\/strong>, efficiency values such as COP are measured at defined flow temperatures (for example, W35 indicates 35\u00b0C heating water temperature).<\/p>\n<p data-start=\"1944\" data-end=\"2090\">Seasonal efficiency values calculated under <strong data-start=\"1988\" data-end=\"2029\"><span class=\"hover:entity-accent entity-underline inline cursor-pointer align-baseline\"><span class=\"whitespace-normal\">EN 14825<\/span><\/span><\/strong> also reflect performance at defined flow temperature levels.<\/p>\n<p data-start=\"2092\" data-end=\"2157\">This ensures standardized and comparable testing across products.<\/p>\n<\/div><\/div><\/div><div class=\"fusion-panel panel-default panel-e492ba7742b829243 fusion-toggle-no-divider fusion-toggle-boxed-mode\" style=\"--awb-title-color:#212934;--awb-content-color:#3f3f3f;\"><div class=\"panel-heading\"><h4 class=\"panel-title toggle\" id=\"toggle_e492ba7742b829243\"><a aria-expanded=\"false\" aria-controls=\"e492ba7742b829243\" role=\"button\" data-toggle=\"collapse\" data-parent=\"#accordion-66916-1\" data-target=\"#e492ba7742b829243\" href=\"#e492ba7742b829243\"><span class=\"fusion-toggle-icon-wrapper\" aria-hidden=\"true\"><i class=\"fa-fusion-box active-icon awb-icon-minus\" aria-hidden=\"true\"><\/i><i class=\"fa-fusion-box inactive-icon awb-icon-plus\" aria-hidden=\"true\"><\/i><\/span><span class=\"fusion-toggle-heading\">6. Does flow temperature affect seasonal efficiency (SCOP)?<\/span><\/a><\/h4><\/div><div id=\"e492ba7742b829243\" class=\"panel-collapse collapse \" aria-labelledby=\"toggle_e492ba7742b829243\"><div class=\"panel-body toggle-content fusion-clearfix\">\n<p data-start=\"2229\" data-end=\"2233\">Yes.<\/p>\n<p data-start=\"2235\" data-end=\"2388\">Lower design flow temperatures generally result in higher SCOP values because the heat pump operates with lower temperature lift over the heating season.<\/p>\n<p data-start=\"2390\" data-end=\"2451\">This often leads to reduced seasonal electricity consumption.<\/p>\n<\/div><\/div><\/div><div class=\"fusion-panel panel-default panel-42ac35e3b11e76405 fusion-toggle-no-divider fusion-toggle-boxed-mode\" style=\"--awb-title-color:#212934;--awb-content-color:#3f3f3f;\"><div class=\"panel-heading\"><h4 class=\"panel-title toggle\" id=\"toggle_42ac35e3b11e76405\"><a aria-expanded=\"false\" aria-controls=\"42ac35e3b11e76405\" role=\"button\" data-toggle=\"collapse\" data-parent=\"#accordion-66916-1\" data-target=\"#42ac35e3b11e76405\" href=\"#42ac35e3b11e76405\"><span class=\"fusion-toggle-icon-wrapper\" aria-hidden=\"true\"><i class=\"fa-fusion-box active-icon awb-icon-minus\" aria-hidden=\"true\"><\/i><i class=\"fa-fusion-box inactive-icon awb-icon-plus\" aria-hidden=\"true\"><\/i><\/span><span class=\"fusion-toggle-heading\">7. Can flow temperature be adjusted automatically?<\/span><\/a><\/h4><\/div><div id=\"42ac35e3b11e76405\" class=\"panel-collapse collapse \" aria-labelledby=\"toggle_42ac35e3b11e76405\"><div class=\"panel-body toggle-content fusion-clearfix\">\n<p data-start=\"2514\" data-end=\"2518\">Yes.<\/p>\n<p data-start=\"2520\" data-end=\"2628\">Modern systems use weather-compensated control, which adjusts flow temperature based on outdoor temperature.<\/p>\n<p data-start=\"2630\" data-end=\"2800\">When outdoor conditions are mild, the system reduces flow temperature to improve efficiency. When it is colder, the system increases flow temperature to maintain comfort.<\/p>\n<p data-start=\"2802\" data-end=\"2859\">This dynamic control helps optimize seasonal performance.<\/p>\n<\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/p>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":34,"featured_media":2902,"parent":66448,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"100-width.php","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-66916","page","type-page","status-publish","has-post-thumbnail","hentry"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.idm-energie.at\/en\/wp-json\/wp\/v2\/pages\/66916","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.idm-energie.at\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.idm-energie.at\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.idm-energie.at\/en\/wp-json\/wp\/v2\/users\/34"}],"replies":[{"embeddable":true,"href":"https:\/\/www.idm-energie.at\/en\/wp-json\/wp\/v2\/comments?post=66916"}],"version-history":[{"count":0,"href":"https:\/\/www.idm-energie.at\/en\/wp-json\/wp\/v2\/pages\/66916\/revisions"}],"up":[{"embeddable":true,"href":"https:\/\/www.idm-energie.at\/en\/wp-json\/wp\/v2\/pages\/66448"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.idm-energie.at\/en\/wp-json\/wp\/v2\/media\/2902"}],"wp:attachment":[{"href":"https:\/\/www.idm-energie.at\/en\/wp-json\/wp\/v2\/media?parent=66916"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}