{"id":66982,"date":"2026-02-25T16:06:05","date_gmt":"2026-02-25T15:06:05","guid":{"rendered":"https:\/\/www.idm-energie.at\/?page_id=66982"},"modified":"2026-07-06T15:42:23","modified_gmt":"2026-07-06T13:42:23","slug":"outdoor-temperature","status":"publish","type":"page","link":"https:\/\/www.idm-energie.at\/en\/heat-pump-efficiency\/outdoor-temperature\/","title":{"rendered":"Outdoor 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;\">Outdoor Temperature in Heat Pump Efficiency<\/h1><\/div><div class=\"fusion-text fusion-text-1\"><p>Outdoor temperature is one of the most influential factors affecting heat pump efficiency.<\/p>\n<p>Because a heat pump transfers heat from the environment into a building, the temperature of that environment directly impacts how much electrical energy is required. As outdoor temperatures change, so does system performance.<\/p>\n<p>Understanding this relationship helps you interpret COP, SCOP, and seasonal efficiency values correctly.<\/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_85 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\/outdoor-temperature\/#What_Is_Outdoor_Temperature\" >What Is Outdoor 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\/outdoor-temperature\/#Outdoor_Temperature_in_Heat_Pump_Systems\" >Outdoor Temperature in Heat Pump Systems<\/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\/outdoor-temperature\/#Why_Outdoor_Temperature_Matters\" >Why Outdoor Temperature Matters<\/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\/outdoor-temperature\/#Outdoor_Temperature_and_COP\" >Outdoor Temperature and COP<\/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\/outdoor-temperature\/#Outdoor_Temperature_and_Seasonal_Efficiency_SCOP\" >Outdoor Temperature and Seasonal Efficiency (SCOP)<\/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\/outdoor-temperature\/#Air-Source_vs_Ground-Source_Sensitivity\" >Air-Source vs Ground-Source Sensitivity<\/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\/outdoor-temperature\/#Extreme_Cold_Conditions\" >Extreme Cold Conditions<\/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\/outdoor-temperature\/#Outdoor_Temperature_and_Cooling_Mode\" >Outdoor Temperature and Cooling Mode<\/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\/outdoor-temperature\/#Climate_Categories_in_European_Standards\" >Climate Categories in European Standards<\/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\/outdoor-temperature\/#Interaction_with_Flow_Temperature\" >Interaction with Flow Temperature<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.idm-energie.at\/en\/heat-pump-efficiency\/outdoor-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-12\" href=\"https:\/\/www.idm-energie.at\/en\/heat-pump-efficiency\/outdoor-temperature\/#Frequently_Asked_Questions_FAQs\" >Frequently Asked Questions (FAQs)<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"What_Is_Outdoor_Temperature\"><\/span>What Is Outdoor Temperature?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Outdoor temperature is the temperature of the air outside a building, usually measured in degrees Celsius (\u00b0C).<\/p>\n<p>In general weather terms, it describes how warm or cold the outside environment is at a specific location and time.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Outdoor_Temperature_in_Heat_Pump_Systems\"><\/span>Outdoor Temperature in Heat Pump Systems<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>In heat pump efficiency, outdoor temperature is especially important because it often serves as the heat source for air-source heat pumps.<\/p>\n<p>When outdoor temperature:<\/p>\n<ul>\n<li>Is higher (mild weather) \u2192 More heat energy is available in the air \u2192 The heat pump operates more efficiently.<\/li>\n<li>Is lower (cold weather) \u2192 Less heat energy is available \u2192 The system requires more electrical input \u2192 Efficiency decreases.<\/li>\n<\/ul>\n<p>This directly affects performance values such as COP and seasonal efficiency calculated under EN 14825.<\/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=\"outdoor temperature as a factor in heat pump efficiency\" title=\"outdoor-temperature\" src=\"https:\/\/www.idm-energie.at\/wp-content\/uploads\/2026\/02\/outdoor-temperature-1024x559.webp\" class=\"img-responsive wp-image-67000\" srcset=\"https:\/\/www.idm-energie.at\/wp-content\/uploads\/2026\/02\/outdoor-temperature-200x109.webp 200w, https:\/\/www.idm-energie.at\/wp-content\/uploads\/2026\/02\/outdoor-temperature-400x218.webp 400w, https:\/\/www.idm-energie.at\/wp-content\/uploads\/2026\/02\/outdoor-temperature-600x327.webp 600w, https:\/\/www.idm-energie.at\/wp-content\/uploads\/2026\/02\/outdoor-temperature-800x436.webp 800w, https:\/\/www.idm-energie.at\/wp-content\/uploads\/2026\/02\/outdoor-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_Outdoor_Temperature_Matters\"><\/span>Why Outdoor Temperature Matters<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Heat pumps operate by moving heat from a lower temperature source to a higher temperature sink (the heating system).<\/p>\n<p>For air-source systems, the outdoor air temperature is the primary heat source. When outdoor temperature drops:<\/p>\n<ul>\n<li>Less thermal energy is available in the air<\/li>\n<li>The compressor must work harder<\/li>\n<li>Electrical consumption increases<\/li>\n<li>COP decreases<\/li>\n<\/ul>\n<p>The larger the temperature difference between the outdoor air and the required flow temperature, the lower the efficiency.<\/p>\n<p>This temperature difference is often called temperature lift.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Outdoor_Temperature_and_COP\"><\/span>Outdoor Temperature and COP<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Efficiency values such as COP are measured at defined test points under EN 14511.<\/p>\n<p>For example:<\/p>\n<ul>\n<li>A7\/W35 \u2192 outdoor air 7\u00b0C, flow temperature 35\u00b0C<\/li>\n<li>A2\/W35 \u2192 outdoor air 2\u00b0C, flow temperature 35\u00b0C<\/li>\n<\/ul>\n<p>The same heat pump will typically have a lower COP at A2\/W35 than at A7\/W35 because colder air increases temperature lift.<\/p>\n<p>This shows how strongly outdoor temperature influences point efficiency.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Outdoor_Temperature_and_Seasonal_Efficiency_SCOP\"><\/span>Outdoor Temperature and Seasonal Efficiency (SCOP)<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Seasonal performance values such as SCOP are calculated according to EN 14825.<\/p>\n<p>EN 14825 uses:<\/p>\n<ul>\n<li>Multiple outdoor temperature bins<\/li>\n<li>Part-load operation data<\/li>\n<li>Defined climate profiles (warmer, average, colder)<\/li>\n<\/ul>\n<p>Because SCOP includes temperature distribution across a heating season, it reflects how the system performs under realistic climate conditions.<\/p>\n<p>In colder climates, SCOP values are typically lower than in milder climates.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Air-Source_vs_Ground-Source_Sensitivity\"><\/span>Air-Source vs Ground-Source Sensitivity<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3>Air-Source Heat Pumps<\/h3>\n<p>Highly dependent on outdoor air temperature.<\/p>\n<p>Efficiency decreases noticeably in colder weather.<\/p>\n<p>At temperatures near freezing, defrost cycles may temporarily reduce heating performance.<\/p>\n<h3>Ground-Source Heat Pumps<\/h3>\n<p>Use soil or groundwater as a heat source.<\/p>\n<p>Subsurface temperatures are more stable throughout winter.<\/p>\n<p>This typically results in more consistent seasonal efficiency.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Extreme_Cold_Conditions\"><\/span>Extreme Cold Conditions<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Modern air-source heat pumps are designed to operate at low outdoor temperatures, but efficiency decreases as:<\/p>\n<ul>\n<li>Outdoor temperature drops<\/li>\n<li>Flow temperature demand increases<\/li>\n<\/ul>\n<p>In very cold conditions, some systems may activate auxiliary heating. This increases electricity consumption and reduces overall seasonal efficiency.<\/p>\n<p>However, seasonal efficiency calculations already account for typical temperature distributions under standardized conditions.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Outdoor_Temperature_and_Cooling_Mode\"><\/span>Outdoor Temperature and Cooling Mode<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>In cooling mode, outdoor temperature also influences efficiency.<\/p>\n<p>As outdoor temperature rises:<\/p>\n<ul>\n<li>Heat rejection becomes more difficult<\/li>\n<li>Electrical input increases<\/li>\n<li>EER decreases<\/li>\n<\/ul>\n<p>Seasonal cooling efficiency (SEER) reflects temperature variations across the cooling season.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Climate_Categories_in_European_Standards\"><\/span>Climate Categories in European Standards<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>European seasonal calculations under EN 14825 use three climate profiles:<\/p>\n<ul>\n<li>Warmer<\/li>\n<li>Average<\/li>\n<li>Colder<\/li>\n<\/ul>\n<p>These categories ensure that seasonal performance reflects realistic regional temperature distributions.<\/p>\n<p>This prevents misleading comparison between products tested under different assumed climates.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Interaction_with_Flow_Temperature\"><\/span>Interaction with Flow Temperature<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Outdoor temperature does not act alone.<\/p>\n<p>Efficiency depends on the combination of:<\/p>\n<ul>\n<li>Outdoor temperature (heat source)<\/li>\n<li>Required flow temperature (heat sink)<\/li>\n<\/ul>\n<p>Lower flow temperature can partially compensate for low outdoor temperature by reducing temperature lift.<\/p>\n<p>This is why system design and building insulation play a critical role in overall efficiency.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Practical_Takeaway\"><\/span>Practical Takeaway<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Outdoor temperature directly affects:<\/p>\n<ul>\n<li>COP at specific operating points<\/li>\n<li>Seasonal efficiency (SCOP)<\/li>\n<li>Electricity consumption<\/li>\n<li>Defrost frequency (air-source systems)<\/li>\n<\/ul>\n<p>When evaluating heat pump efficiency:<\/p>\n<ul>\n<li>Always consider climate zone<\/li>\n<li>Compare identical test conditions<\/li>\n<li>Understand that colder conditions reduce point efficiency<\/li>\n<\/ul>\n<p>Understanding outdoor temperature as a performance factor helps interpret efficiency values correctly and avoid unrealistic expectations.<\/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:#59682f;--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-66982-1\"><div class=\"fusion-panel panel-default panel-8534f4fdcf8c8d836 fusion-toggle-no-divider fusion-toggle-boxed-mode\" style=\"--awb-title-color:#59682f;--awb-content-color:#3f3f3f;\"><div class=\"panel-heading\"><h4 class=\"panel-title toggle\" id=\"toggle_8534f4fdcf8c8d836\"><a aria-expanded=\"false\" aria-controls=\"8534f4fdcf8c8d836\" role=\"button\" data-toggle=\"collapse\" data-parent=\"#accordion-66982-1\" data-target=\"#8534f4fdcf8c8d836\" href=\"#8534f4fdcf8c8d836\"><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 outdoor temperature in heat pump efficiency?<\/span><\/a><\/h4><\/div><div id=\"8534f4fdcf8c8d836\" class=\"panel-collapse collapse \" aria-labelledby=\"toggle_8534f4fdcf8c8d836\"><div class=\"panel-body toggle-content fusion-clearfix\">\n<p>Outdoor temperature refers to the temperature of the outside air surrounding the building.<\/p>\n<p>For air-source heat pumps, outdoor air acts as the primary heat source in heating mode. Changes in outdoor temperature directly influence how efficiently the system can extract and transfer heat.<\/p>\n<\/div><\/div><\/div><div class=\"fusion-panel panel-default panel-2b21cc79c71f5d744 fusion-toggle-no-divider fusion-toggle-boxed-mode\" style=\"--awb-title-color:#59682f;--awb-content-color:#3f3f3f;\"><div class=\"panel-heading\"><h4 class=\"panel-title toggle\" id=\"toggle_2b21cc79c71f5d744\"><a aria-expanded=\"false\" aria-controls=\"2b21cc79c71f5d744\" role=\"button\" data-toggle=\"collapse\" data-parent=\"#accordion-66982-1\" data-target=\"#2b21cc79c71f5d744\" href=\"#2b21cc79c71f5d744\"><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 outdoor temperature affect heat pump efficiency?<\/span><\/a><\/h4><\/div><div id=\"2b21cc79c71f5d744\" class=\"panel-collapse collapse \" aria-labelledby=\"toggle_2b21cc79c71f5d744\"><div class=\"panel-body toggle-content fusion-clearfix\">\n<p data-start=\"696\" data-end=\"803\">Heat pumps transfer heat from a lower temperature source to a higher temperature level inside the building.<\/p>\n<p data-start=\"805\" data-end=\"840\">When outdoor temperature decreases:<\/p>\n<ul data-start=\"842\" data-end=\"980\">\n<li data-start=\"842\" data-end=\"889\">\n<p data-start=\"844\" data-end=\"889\">Less thermal energy is available in the air<\/p>\n<\/li>\n<li data-start=\"890\" data-end=\"925\">\n<p data-start=\"892\" data-end=\"925\">The compressor must work harder<\/p>\n<\/li>\n<li data-start=\"926\" data-end=\"962\">\n<p data-start=\"928\" data-end=\"962\">Electrical consumption increases<\/p>\n<\/li>\n<li data-start=\"963\" data-end=\"980\">\n<p data-start=\"965\" data-end=\"980\">COP decreases<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"982\" data-end=\"1096\">The larger the temperature difference between outdoor air and required flow temperature, the lower the efficiency.<\/p>\n<\/div><\/div><\/div><div class=\"fusion-panel panel-default panel-b67d3135bfe4457a3 fusion-toggle-no-divider fusion-toggle-boxed-mode\" style=\"--awb-title-color:#59682f;--awb-content-color:#3f3f3f;\"><div class=\"panel-heading\"><h4 class=\"panel-title toggle\" id=\"toggle_b67d3135bfe4457a3\"><a aria-expanded=\"false\" aria-controls=\"b67d3135bfe4457a3\" role=\"button\" data-toggle=\"collapse\" data-parent=\"#accordion-66982-1\" data-target=\"#b67d3135bfe4457a3\" href=\"#b67d3135bfe4457a3\"><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. How is outdoor temperature considered in standardized testing?<\/span><\/a><\/h4><\/div><div id=\"b67d3135bfe4457a3\" class=\"panel-collapse collapse \" aria-labelledby=\"toggle_b67d3135bfe4457a3\"><div class=\"panel-body toggle-content fusion-clearfix\">\n<p data-start=\"1174\" data-end=\"1352\">Under <strong data-start=\"1180\" data-end=\"1221\"><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 outdoor temperature conditions (for example, A7 indicates 7\u00b0C outdoor air).<\/p>\n<p data-start=\"1354\" data-end=\"1535\">Seasonal efficiency values such as SCOP are calculated according to <strong data-start=\"1422\" data-end=\"1463\"><span class=\"hover:entity-accent entity-underline inline cursor-pointer align-baseline\"><span class=\"whitespace-normal\">EN 14825<\/span><\/span><\/strong>, which includes multiple outdoor temperature bins and climate profiles.<\/p>\n<p data-start=\"1537\" data-end=\"1588\">This ensures consistent comparison across products.<\/p>\n<\/div><\/div><\/div><div class=\"fusion-panel panel-default panel-475b033a387f1cef9 fusion-toggle-no-divider fusion-toggle-boxed-mode\" style=\"--awb-title-color:#59682f;--awb-content-color:#3f3f3f;\"><div class=\"panel-heading\"><h4 class=\"panel-title toggle\" id=\"toggle_475b033a387f1cef9\"><a aria-expanded=\"false\" aria-controls=\"475b033a387f1cef9\" role=\"button\" data-toggle=\"collapse\" data-parent=\"#accordion-66982-1\" data-target=\"#475b033a387f1cef9\" href=\"#475b033a387f1cef9\"><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. Do colder climates reduce seasonal efficiency?<\/span><\/a><\/h4><\/div><div id=\"475b033a387f1cef9\" class=\"panel-collapse collapse \" aria-labelledby=\"toggle_475b033a387f1cef9\"><div class=\"panel-body toggle-content fusion-clearfix\">\n<p data-start=\"1650\" data-end=\"1665\">Generally, yes.<\/p>\n<p data-start=\"1667\" data-end=\"1825\">In colder climates, heat pumps operate more frequently at lower outdoor temperatures. This increases temperature lift and reduces average seasonal efficiency.<\/p>\n<p data-start=\"1827\" data-end=\"1939\">European seasonal calculations account for this using standardized climate categories (warmer, average, colder).<\/p>\n<\/div><\/div><\/div><div class=\"fusion-panel panel-default panel-5c550f0f71e46e374 fusion-toggle-no-divider fusion-toggle-boxed-mode\" style=\"--awb-title-color:#59682f;--awb-content-color:#3f3f3f;\"><div class=\"panel-heading\"><h4 class=\"panel-title toggle\" id=\"toggle_5c550f0f71e46e374\"><a aria-expanded=\"false\" aria-controls=\"5c550f0f71e46e374\" role=\"button\" data-toggle=\"collapse\" data-parent=\"#accordion-66982-1\" data-target=\"#5c550f0f71e46e374\" href=\"#5c550f0f71e46e374\"><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. Does outdoor temperature affect cooling efficiency?<\/span><\/a><\/h4><\/div><div id=\"5c550f0f71e46e374\" class=\"panel-collapse collapse \" aria-labelledby=\"toggle_5c550f0f71e46e374\"><div class=\"panel-body toggle-content fusion-clearfix\">\n<p data-start=\"2006\" data-end=\"2010\">Yes.<\/p>\n<p data-start=\"2012\" data-end=\"2163\">In cooling mode, higher outdoor temperatures make it more difficult to reject heat to the environment. This increases electrical input and reduces EER.<\/p>\n<p data-start=\"2165\" data-end=\"2266\">Seasonal cooling efficiency (SEER) reflects outdoor temperature variations across the cooling season.<\/p>\n<\/div><\/div><\/div><div class=\"fusion-panel panel-default panel-0d502f7c97105b994 fusion-toggle-no-divider fusion-toggle-boxed-mode\" style=\"--awb-title-color:#59682f;--awb-content-color:#3f3f3f;\"><div class=\"panel-heading\"><h4 class=\"panel-title toggle\" id=\"toggle_0d502f7c97105b994\"><a aria-expanded=\"false\" aria-controls=\"0d502f7c97105b994\" role=\"button\" data-toggle=\"collapse\" data-parent=\"#accordion-66982-1\" data-target=\"#0d502f7c97105b994\" href=\"#0d502f7c97105b994\"><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. Is outdoor temperature the only factor affecting efficiency?<\/span><\/a><\/h4><\/div><div id=\"0d502f7c97105b994\" class=\"panel-collapse collapse \" aria-labelledby=\"toggle_0d502f7c97105b994\"><div class=\"panel-body toggle-content fusion-clearfix\">\n<p data-start=\"2342\" data-end=\"2345\">No.<\/p>\n<p data-start=\"2347\" data-end=\"2409\">Efficiency depends on multiple interacting factors, including:<\/p>\n<ul data-start=\"2411\" data-end=\"2525\">\n<li data-start=\"2411\" data-end=\"2431\">\n<p data-start=\"2413\" data-end=\"2431\">Flow temperature<\/p>\n<\/li>\n<li data-start=\"2432\" data-end=\"2455\">\n<p data-start=\"2434\" data-end=\"2455\">Heat emitter design<\/p>\n<\/li>\n<li data-start=\"2456\" data-end=\"2476\">\n<p data-start=\"2458\" data-end=\"2476\">Control strategy<\/p>\n<\/li>\n<li data-start=\"2477\" data-end=\"2501\">\n<p data-start=\"2479\" data-end=\"2501\">Installation quality<\/p>\n<\/li>\n<li data-start=\"2502\" data-end=\"2525\">\n<p data-start=\"2504\" data-end=\"2525\">Building insulation<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"2527\" data-end=\"2649\">Outdoor temperature is one of the most influential external factors, but overall system design also plays a critical role.<\/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-66982","page","type-page","status-publish","has-post-thumbnail","hentry"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.idm-energie.at\/en\/wp-json\/wp\/v2\/pages\/66982","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=66982"}],"version-history":[{"count":0,"href":"https:\/\/www.idm-energie.at\/en\/wp-json\/wp\/v2\/pages\/66982\/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=66982"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}