{"id":67279,"date":"2026-03-02T14:49:21","date_gmt":"2026-03-02T13:49:21","guid":{"rendered":"https:\/\/www.idm-energie.at\/?page_id=67279"},"modified":"2026-07-06T16:17:05","modified_gmt":"2026-07-06T14:17:05","slug":"control-strategy-effect","status":"publish","type":"page","link":"https:\/\/www.idm-energie.at\/en\/heat-pump-efficiency\/control-strategy-effect\/","title":{"rendered":"Control Strategy Effect"},"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;\">Control Strategy Effect on Heat Pump Efficiency<\/h1><\/div><div class=\"fusion-text fusion-text-1\"><p>Control strategy is one of the biggest \u201cinvisible\u201d drivers of heat pump efficiency. It is the set of rules that decides when the heat pump runs, what flow temperature it targets, how it reacts to outdoor temperature changes, and how it avoids unnecessary cycling.<\/p>\n<p>A heat pump can have excellent rated performance, but if the controls force higher temperatures, frequent start-stop operation, or unnecessary pump runtime, the system efficiency and seasonal performance can drop noticeably.<\/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\/control-strategy-effect\/#What_is_the_Control_Strategy_Effect\" >What is the Control Strategy Effect?<\/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\/control-strategy-effect\/#What_%E2%80%9Ccontrol_strategy%E2%80%9D_means_in_practice\" >What \u201ccontrol strategy\u201d means in practice<\/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\/control-strategy-effect\/#Why_control_strategy_affects_efficiency\" >Why control strategy affects efficiency<\/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\/control-strategy-effect\/#Weather_compensation_and_the_heating_curve\" >Weather compensation and the heating curve<\/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\/control-strategy-effect\/#Room_thermostats_setback_and_%E2%80%9Conoff_thinking%E2%80%9D\" >Room thermostats, setback, and \u201con\/off thinking\u201d<\/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\/control-strategy-effect\/#Zoning_control_and_efficiency\" >Zoning control and efficiency<\/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\/control-strategy-effect\/#Domestic_hot_water_control_strategy\" >Domestic hot water control strategy<\/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\/control-strategy-effect\/#Control_strategy_and_seasonal_ratings\" >Control strategy and seasonal ratings<\/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\/control-strategy-effect\/#Frequently_Asked_Questions_FAQs\" >Frequently Asked Questions (FAQs)<\/a><\/li><\/ul><\/nav><\/div>\n<h2 data-start=\"605\" data-end=\"649\"><span class=\"ez-toc-section\" id=\"What_is_the_Control_Strategy_Effect\"><\/span>What is the Control Strategy Effect?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"605\" data-end=\"649\">A heat pump control strategy is the set of rules and algorithms that dictate when the heat pump turns on, what temperature it produces, and how fast it runs. Unlike a traditional boiler that often operates at a fixed, high temperature, a heat pump\u2019s efficiency is highly sensitive to its operating conditions.<\/p>\n<h2 data-start=\"605\" data-end=\"649\"><span class=\"ez-toc-section\" id=\"What_%E2%80%9Ccontrol_strategy%E2%80%9D_means_in_practice\"><\/span>What \u201ccontrol strategy\u201d means in practice<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"651\" data-end=\"699\">A heat pump control strategy typically includes:<\/p>\n<ul data-start=\"701\" data-end=\"1382\">\n<li data-start=\"701\" data-end=\"800\">\n<p data-start=\"703\" data-end=\"800\"><strong data-start=\"703\" data-end=\"744\">Weather compensation (heating curve):<\/strong> flow temperature adjusts based on outdoor temperature<\/p>\n<\/li>\n<li data-start=\"801\" data-end=\"881\">\n<p data-start=\"803\" data-end=\"881\"><strong data-start=\"803\" data-end=\"839\">Room control \/ thermostat logic:<\/strong> how indoor temperature feedback is used<\/p>\n<\/li>\n<li data-start=\"882\" data-end=\"948\">\n<p data-start=\"884\" data-end=\"948\"><strong data-start=\"884\" data-end=\"903\">Time schedules:<\/strong> setback, night operation, warm-up behavior<\/p>\n<\/li>\n<li data-start=\"949\" data-end=\"1014\">\n<p data-start=\"951\" data-end=\"1014\"><strong data-start=\"951\" data-end=\"962\">Zoning:<\/strong> how multiple heating zones and valves are managed<\/p>\n<\/li>\n<li data-start=\"1015\" data-end=\"1094\">\n<p data-start=\"1017\" data-end=\"1094\"><strong data-start=\"1017\" data-end=\"1054\">Domestic hot water (DHW) control:<\/strong> priority, setpoints, reheating cycles<\/p>\n<\/li>\n<li data-start=\"1095\" data-end=\"1171\">\n<p data-start=\"1097\" data-end=\"1171\"><strong data-start=\"1097\" data-end=\"1120\">Anti-cycling logic:<\/strong> minimum run times, minimum off times, hysteresis<\/p>\n<\/li>\n<li data-start=\"1172\" data-end=\"1256\">\n<p data-start=\"1174\" data-end=\"1256\"><strong data-start=\"1174\" data-end=\"1201\">Pump and valve control:<\/strong> how circulation pumps and mixing valves are operated<\/p>\n<\/li>\n<li data-start=\"1257\" data-end=\"1382\">\n<p data-start=\"1259\" data-end=\"1382\"><strong data-start=\"1259\" data-end=\"1294\">Bivalent \/ backup heater logic:<\/strong> if present, when auxiliary heat is allowed to run<\/p>\n<\/li>\n<\/ul>\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=\"Infographic comparing heat pump control strategies, showing how smart controls with weather compensation lead to higher seasonal efficiency (SCOP) than basic on\/off cycling.\" title=\"control-strategy-effect\" src=\"https:\/\/www.idm-energie.at\/wp-content\/uploads\/2026\/03\/control-strategy-effect-1024x559.webp\" class=\"img-responsive wp-image-67293\" srcset=\"https:\/\/www.idm-energie.at\/wp-content\/uploads\/2026\/03\/control-strategy-effect-200x109.webp 200w, https:\/\/www.idm-energie.at\/wp-content\/uploads\/2026\/03\/control-strategy-effect-400x218.webp 400w, https:\/\/www.idm-energie.at\/wp-content\/uploads\/2026\/03\/control-strategy-effect-600x327.webp 600w, https:\/\/www.idm-energie.at\/wp-content\/uploads\/2026\/03\/control-strategy-effect-800x436.webp 800w, https:\/\/www.idm-energie.at\/wp-content\/uploads\/2026\/03\/control-strategy-effect-1200x655.webp 1200w\" sizes=\"(max-width: 1024px) 100vw, (max-width: 640px) 100vw, 1200px\" \/><\/span><\/div><div class=\"fusion-text fusion-text-6\"><h2 data-start=\"1389\" data-end=\"1431\"><span class=\"ez-toc-section\" id=\"Why_control_strategy_affects_efficiency\"><\/span>Why control strategy affects efficiency<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3 data-start=\"1433\" data-end=\"1489\">Flow temperature control is an efficiency lever<\/h3>\n<p data-start=\"1490\" data-end=\"1885\">Heat pumps operate more efficiently at lower flow temperatures. Weather compensation reduces flow temperature in mild weather instead of running at a constant high setpoint. SEAI notes that weather compensation improves efficiency and comfort, and for heat pumps it has an added benefit because the heat pump operates more efficiently at lower temperatures.<\/p>\n<h3 data-start=\"1887\" data-end=\"1938\">Cycling losses reduce seasonal performance<\/h3>\n<p data-start=\"1939\" data-end=\"2286\">Many buildings require only part of the heat pump\u2019s maximum output for most of the year. If the control strategy causes frequent on\/off cycling, seasonal efficiency drops. Research and field discussions consistently highlight cycling response and control configuration as influential for part-load efficiency.<\/p>\n<h3 data-start=\"2288\" data-end=\"2326\">Auxiliary electricity adds up<\/h3>\n<p data-start=\"2327\" data-end=\"2582\">Controls also decide how long pumps run, whether valves keep circulating water, and when standby modes are active. Those electrical loads can reduce overall system efficiency even if the compressor is performing well.<\/p>\n<h2 data-start=\"2589\" data-end=\"2634\"><span class=\"ez-toc-section\" id=\"Weather_compensation_and_the_heating_curve\"><\/span>Weather compensation and the heating curve<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"2636\" data-end=\"2802\">Weather compensation (also called an outdoor reset or heating curve) is widely treated as the most efficient base control approach for hydronic heat pumps because it:<\/p>\n<ul data-start=\"2804\" data-end=\"3029\">\n<li data-start=\"2804\" data-end=\"2863\">\n<p data-start=\"2806\" data-end=\"2863\">lowers flow temperature whenever outdoor conditions allow<\/p>\n<\/li>\n<li data-start=\"2864\" data-end=\"2925\">\n<p data-start=\"2866\" data-end=\"2925\">reduces cycling by keeping the system running more steadily<\/p>\n<\/li>\n<li data-start=\"2926\" data-end=\"3029\">\n<p data-start=\"2928\" data-end=\"3029\">improves comfort stability by matching heat supply to heat loss<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"3031\" data-end=\"3372\">Weather compensation must be set correctly. If the heating curve is too steep, the system runs hotter than needed and efficiency falls. Guidance for homeowners and operators specifically calls out checking the weather compensation curve and setpoints to keep systems efficient.<\/p>\n<h2 data-start=\"3379\" data-end=\"3430\"><span class=\"ez-toc-section\" id=\"Room_thermostats_setback_and_%E2%80%9Conoff_thinking%E2%80%9D\"><\/span>Room thermostats, setback, and \u201con\/off thinking\u201d<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"3432\" data-end=\"3736\">Heat pumps generally perform best with <strong data-start=\"3471\" data-end=\"3508\">steady, low-temperature operation<\/strong> rather than sharp on\/off patterns. A control strategy that frequently shuts down and restarts the heat pump (for example, aggressive thermostat setbacks or short time blocks) can increase cycling and reduce seasonal efficiency.<\/p>\n<p data-start=\"3738\" data-end=\"4069\">This does not mean \u201cnever use schedules.\u201d It means schedules should be used in a way that avoids repeated warm-up spikes that force higher temperatures or short cycling. Practical operation guidance recommends reviewing time and temperature settings and adapting them to actual usage patterns.<\/p>\n<h2 data-start=\"4076\" data-end=\"4108\"><span class=\"ez-toc-section\" id=\"Zoning_control_and_efficiency\"><\/span>Zoning control and efficiency<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"4110\" data-end=\"4221\">Zoning can improve comfort and reduce heating in unused spaces, but it can also reduce efficiency if it causes:<\/p>\n<ul data-start=\"4223\" data-end=\"4338\">\n<li data-start=\"4223\" data-end=\"4268\">\n<p data-start=\"4225\" data-end=\"4268\">frequent closing of circuits (reduced flow)<\/p>\n<\/li>\n<li data-start=\"4269\" data-end=\"4299\">\n<p data-start=\"4271\" data-end=\"4299\">unstable return temperatures<\/p>\n<\/li>\n<li data-start=\"4300\" data-end=\"4338\">\n<p data-start=\"4302\" data-end=\"4338\">short cycling due to low active load<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"4340\" data-end=\"4653\">In those cases, the control strategy must manage flow and minimum run conditions properly (sometimes with system design measures such as hydraulic balancing or a correctly justified buffer volume). The goal is: <strong data-start=\"4551\" data-end=\"4615\">heat only where needed, without destabilizing the heat pump.<\/strong><\/p>\n<h2 data-start=\"4660\" data-end=\"4698\"><span class=\"ez-toc-section\" id=\"Domestic_hot_water_control_strategy\"><\/span>Domestic hot water control strategy<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"4700\" data-end=\"4815\">DHW production often requires a higher temperature than space heating. Control strategy affects efficiency through:<\/p>\n<ul data-start=\"4817\" data-end=\"4979\">\n<li data-start=\"4817\" data-end=\"4841\">\n<p data-start=\"4819\" data-end=\"4841\">DHW setpoint selection<\/p>\n<\/li>\n<li data-start=\"4842\" data-end=\"4876\">\n<p data-start=\"4844\" data-end=\"4876\">how often reheating is triggered<\/p>\n<\/li>\n<li data-start=\"4877\" data-end=\"4934\">\n<p data-start=\"4879\" data-end=\"4934\">whether DHW is given strict priority over space heating<\/p>\n<\/li>\n<li data-start=\"4935\" data-end=\"4979\">\n<p data-start=\"4937\" data-end=\"4979\">how backup heating is managed (if present)<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"4981\" data-end=\"5288\">A practical efficiency approach is to avoid unnecessarily high DHW setpoints and avoid reheating patterns that cause frequent, short high-temperature cycles\u2014while still meeting hygiene and comfort needs (the exact requirements depend on system type and local guidance).<\/p>\n<h2 data-start=\"5295\" data-end=\"5335\"><span class=\"ez-toc-section\" id=\"Control_strategy_and_seasonal_ratings\"><\/span>Control strategy and seasonal ratings<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"5337\" data-end=\"5518\">Seasonal performance standards consider part-load operation and auxiliary consumption because these are real drivers of seasonal efficiency.<\/p>\n<p data-start=\"5520\" data-end=\"5703\">Seasonal efficiency depends on how the heat pump is controlled across varying temperatures and loads, not only on a single rated COP value.<\/p>\n<p data-start=\"5733\" data-end=\"5801\">Control strategy affects heat pump efficiency mainly by controlling:<\/p>\n<ul data-start=\"5803\" data-end=\"6064\">\n<li data-start=\"5803\" data-end=\"5863\">\n<p data-start=\"5805\" data-end=\"5863\"><strong data-start=\"5805\" data-end=\"5825\">flow temperature<\/strong> (especially via weather compensation)<\/p>\n<\/li>\n<li data-start=\"5864\" data-end=\"5925\">\n<p data-start=\"5866\" data-end=\"5925\"><strong data-start=\"5866\" data-end=\"5877\">cycling<\/strong> (stable part-load operation vs frequent on\/off)<\/p>\n<\/li>\n<li data-start=\"5926\" data-end=\"5991\">\n<p data-start=\"5928\" data-end=\"5991\"><strong data-start=\"5928\" data-end=\"5953\">auxiliary electricity<\/strong> (pumps, standby, backup heater logic)<\/p>\n<\/li>\n<li data-start=\"5992\" data-end=\"6064\">\n<p data-start=\"5994\" data-end=\"6064\"><strong data-start=\"5994\" data-end=\"6024\">DHW temperature and timing<\/strong><\/p>\n<\/li>\n<\/ul>\n<p data-start=\"6066\" data-end=\"6270\">A well-tuned control strategy helps the heat pump run at the lowest temperature needed, with long stable runtimes\u2014supporting higher seasonal efficiency and lower electricity consumption in real operation.<\/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 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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\" 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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-67279-1\"><div class=\"fusion-panel panel-default panel-a782c09170b8acdee 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_a782c09170b8acdee\"><a aria-expanded=\"false\" aria-controls=\"a782c09170b8acdee\" role=\"button\" data-toggle=\"collapse\" data-parent=\"#accordion-67279-1\" data-target=\"#a782c09170b8acdee\" href=\"#a782c09170b8acdee\"><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 a control strategy in a heat pump system?<\/span><\/a><\/h4><\/div><div id=\"a782c09170b8acdee\" class=\"panel-collapse collapse \" aria-labelledby=\"toggle_a782c09170b8acdee\"><div class=\"panel-body toggle-content fusion-clearfix\">\n<p>A control strategy is the set of control rules and settings that determines how a heat pump operates. It defines when the system runs, what flow temperature it targets, how it reacts to outdoor temperature changes, and how it manages domestic hot water, pumps, and (if present) backup heating.<\/p>\n<\/div><\/div><\/div><div class=\"fusion-panel panel-default panel-e17f9326446fe71a7 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_e17f9326446fe71a7\"><a aria-expanded=\"false\" aria-controls=\"e17f9326446fe71a7\" role=\"button\" data-toggle=\"collapse\" data-parent=\"#accordion-67279-1\" data-target=\"#e17f9326446fe71a7\" href=\"#e17f9326446fe71a7\"><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 control strategy affect heat pump efficiency?<\/span><\/a><\/h4><\/div><div id=\"e17f9326446fe71a7\" class=\"panel-collapse collapse \" aria-labelledby=\"toggle_e17f9326446fe71a7\"><div class=\"panel-body toggle-content fusion-clearfix\">\n<p data-start=\"724\" data-end=\"807\">Control strategy affects efficiency because it influences key drivers of electricity use, especially flow temperature, cycling frequency, and auxiliary energy consumption. Controls that keep temperatures higher than necessary or cause frequent start-stop operation typically reduce seasonal performance.<\/p>\n<\/div><\/div><\/div><div class=\"fusion-panel panel-default panel-46c865e6e1409303e 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_46c865e6e1409303e\"><a aria-expanded=\"false\" aria-controls=\"46c865e6e1409303e\" role=\"button\" data-toggle=\"collapse\" data-parent=\"#accordion-67279-1\" data-target=\"#46c865e6e1409303e\" href=\"#46c865e6e1409303e\"><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 weather compensation and why is it efficient?<\/span><\/a><\/h4><\/div><div id=\"46c865e6e1409303e\" class=\"panel-collapse collapse \" aria-labelledby=\"toggle_46c865e6e1409303e\"><div class=\"panel-body toggle-content fusion-clearfix\">\n<p data-start=\"817\" data-end=\"840\">Weather compensation (heating curve control) adjusts flow temperature based on outdoor temperature. It improves efficiency because the system delivers only the temperature needed for current conditions, reducing temperature lift and supporting steadier operation at part load.<\/p>\n<\/div><\/div><\/div><div class=\"fusion-panel panel-default panel-207e2d1766fece7d5 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_207e2d1766fece7d5\"><a aria-expanded=\"false\" aria-controls=\"207e2d1766fece7d5\" role=\"button\" data-toggle=\"collapse\" data-parent=\"#accordion-67279-1\" data-target=\"#207e2d1766fece7d5\" href=\"#207e2d1766fece7d5\"><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. Can thermostats and scheduling reduce efficiency?<\/span><\/a><\/h4><\/div><div id=\"207e2d1766fece7d5\" class=\"panel-collapse collapse \" aria-labelledby=\"toggle_207e2d1766fece7d5\"><div class=\"panel-body toggle-content fusion-clearfix\">\n<p data-start=\"1293\" data-end=\"1390\">They can if they cause frequent on\/off cycling or repeated warm-up spikes that require higher flow temperatures. Heat pumps often operate most efficiently with stable, low-temperature operation. Scheduling can still be used, but it should avoid patterns that force short high-demand cycles.<\/p>\n<\/div><\/div><\/div><div class=\"fusion-panel panel-default panel-1fec284889e226746 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_1fec284889e226746\"><a aria-expanded=\"false\" aria-controls=\"1fec284889e226746\" role=\"button\" data-toggle=\"collapse\" data-parent=\"#accordion-67279-1\" data-target=\"#1fec284889e226746\" href=\"#1fec284889e226746\"><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 can zoning affect heat pump efficiency?<\/span><\/a><\/h4><\/div><div id=\"1fec284889e226746\" class=\"panel-collapse collapse \" aria-labelledby=\"toggle_1fec284889e226746\"><div class=\"panel-body toggle-content fusion-clearfix\">\n<p data-start=\"1730\" data-end=\"1733\">Zoning can improve comfort and reduce heating in unused rooms, but it can reduce efficiency if many zones close frequently and the heat pump is left with low active load or unstable flow. Good zoning control needs stable flow management and anti-cycling logic.<\/p>\n<\/div><\/div><\/div><div class=\"fusion-panel panel-default panel-53784c942c648f06c 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_53784c942c648f06c\"><a aria-expanded=\"false\" aria-controls=\"53784c942c648f06c\" role=\"button\" data-toggle=\"collapse\" data-parent=\"#accordion-67279-1\" data-target=\"#53784c942c648f06c\" href=\"#53784c942c648f06c\"><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 domestic hot water control influence efficiency?<\/span><\/a><\/h4><\/div><div id=\"53784c942c648f06c\" class=\"panel-collapse collapse \" aria-labelledby=\"toggle_53784c942c648f06c\"><div class=\"panel-body toggle-content fusion-clearfix\">\n<p data-start=\"1967\" data-end=\"2008\">Yes. Domestic hot water often requires higher temperatures than space heating. Higher setpoints and frequent reheating cycles can reduce efficiency because they increase temperature lift and may create more high-temperature operating hours.<\/p>\n<\/div><\/div><\/div><div class=\"fusion-panel panel-default panel-29fca50e6a1dc85db 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_29fca50e6a1dc85db\"><a aria-expanded=\"false\" aria-controls=\"29fca50e6a1dc85db\" role=\"button\" data-toggle=\"collapse\" data-parent=\"#accordion-67279-1\" data-target=\"#29fca50e6a1dc85db\" href=\"#29fca50e6a1dc85db\"><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 a well-rated heat pump still perform poorly because of controls?<\/span><\/a><\/h4><\/div><div id=\"29fca50e6a1dc85db\" class=\"panel-collapse collapse \" aria-labelledby=\"toggle_29fca50e6a1dc85db\"><div class=\"panel-body toggle-content fusion-clearfix\">\n<p data-start=\"2023\" data-end=\"2154\">Yes. A strong COP or SCOP rating does not guarantee high real-world efficiency if the control strategy forces unnecessarily high temperatures, frequent cycling, or high auxiliary electricity consumption. Control setup and commissioning strongly influence system 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-67279","page","type-page","status-publish","has-post-thumbnail","hentry"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.idm-energie.at\/en\/wp-json\/wp\/v2\/pages\/67279","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=67279"}],"version-history":[{"count":0,"href":"https:\/\/www.idm-energie.at\/en\/wp-json\/wp\/v2\/pages\/67279\/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=67279"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}