{"id":2975,"date":"2025-03-19T14:31:43","date_gmt":"2025-03-19T14:31:43","guid":{"rendered":"https:\/\/heatpumpingtechnologies.org\/annex62\/?page_id=2975"},"modified":"2025-09-12T14:42:35","modified_gmt":"2025-09-12T14:42:35","slug":"de014-hybrid-solution-for-two-mfbs-in-hamburg","status":"publish","type":"case_studies","link":"https:\/\/heatpumpingtechnologies.org\/project62\/case-studies\/de014-hybrid-solution-for-two-mfbs-in-hamburg\/","title":{"rendered":"DE014 Hybrid Solution for two MFBs in Hamburg"},"content":{"rendered":"\n<div class=\"wp-block-group is-layout-constrained wp-block-group-is-layout-constrained\">\n<div class=\"wp-block-group is-layout-constrained wp-block-group-is-layout-constrained\"><div class=\"container container--no-margin\">\n<p class=\"wp-block-paragraph \" style=\"font-size:25px\">Free and Hanseatic City of Hamburg, Germany<\/p>\n<\/div>\n\n\n<div class=\"wp-block-group is-layout-constrained wp-block-group-is-layout-constrained\"><div class=\"container container--no-margin\">\n<p class=\"wp-block-paragraph \">The landlords of two multi-family buildings (MFBs) in the Schnelsen district in Hamburg were worried that their old heating system might reach its end of service life in the near future. Thus, it was their highest priority to ensure that the tenants could still properly heat their apartments in the upcoming winter days so no one had to be cold.<\/p>\n<\/div>\n\n<div class=\"container container--no-margin\">\n<p class=\"wp-block-paragraph \">Accordingly, they went out looking a modern and sustainable solution that could be implemented without renovation efforts going pear-shaped. Eventually, they found a way:<\/p>\n<\/div>\n\n<div class=\"container container--no-margin\">\n<p class=\"wp-block-paragraph \">Both buildings would be heated with a hybrid solution consisting of heat pumps and gas boilers.<\/p>\n<\/div>\n\n<div class=\"container\">\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1080\" height=\"1080\" src=\"https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/75\/2025\/03\/de014-hplarge.png\" alt=\"\" class=\"wp-image-2976\" srcset=\"https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/75\/2025\/03\/de014-hplarge.png 1080w, https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/75\/2025\/03\/de014-hplarge-300x300.png 300w, https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/75\/2025\/03\/de014-hplarge-1024x1024.png 1024w, https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/75\/2025\/03\/de014-hplarge-150x150.png 150w, https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/75\/2025\/03\/de014-hplarge-768x768.png 768w, https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/75\/2025\/03\/de014-hplarge-400x400.png 400w\" sizes=\"auto, (max-width: 1080px) 100vw, 1080px\" \/><figcaption class=\"wp-element-caption\">Credits: bwp Bundesverband W\u00e4rmepumpe eV; DIEHN Heizungstechnik<\/figcaption><\/figure>\n<\/div><\/div>\n\n\n<div class=\"container container--no-margin\">\n<p class=\"wp-block-paragraph \"><strong>Lessons learned<\/strong><\/p>\n<\/div>\n\n<div class=\"container container--no-margin\">\n<ul class=\"wp-block-list\">\n<li>Even without an extensive renovation of the buildings, the heat pumps were able to keep the inhabitants comfortable.<\/li>\n<\/ul>\n<\/div>\n\n<div class=\"container container--no-margin\">\n<p class=\"wp-block-paragraph \"><strong>Key facts<\/strong><\/p>\n<\/div>\n\n\n<div class=\"wp-block-group is-layout-constrained wp-block-group-is-layout-constrained\"><div class=\"container container--no-margin\">\n<figure class=\"wp-block-table is-style-stripes\"><table><tbody><tr><td><strong>Building<\/strong><\/td><td><\/td><td><strong>Heat Pump and Source<\/strong><\/td><td><\/td><\/tr><tr><td>Location<\/td><td><em>Hamburg, Germany<\/em><\/td><td>Number of HP<\/td><td><em>2 (1 for each building)<\/em><\/td><\/tr><tr><td>Construction<\/td><td><em>1968<\/em>, <em>retrofitted<\/em><\/td><td>Operation mode<\/td><td><em>bivalent-parallel<\/em><\/td><\/tr><tr><td>No. of buildings<\/td><td><em>2<\/em><\/td><td>Heat source<\/td><td><em>air<\/em><\/td><\/tr><tr><td>Level of insulation<\/td><td><em>poor<\/em><\/td><td>Type of system<\/td><td><em>central<\/em><\/td><\/tr><tr><td><\/td><td><\/td><td>Model<\/td><td><em>Vitocal 200-A PRO<\/em><br><em>AWo-AC 201<\/em><\/td><\/tr><tr><td><\/td><td><\/td><td>Installed power<\/td><td><em>32 kW<\/em><br><em>64 kW<\/em><\/td><\/tr><tr><td><strong>Heating system (SH + DHW)<\/strong><\/td><td><\/td><td><\/td><td><\/td><\/tr><tr><td>Heating temp<\/td><td><em>65\u00b0C<\/em><\/td><td>Gas boilers<\/td><td><em>60 kW<\/em><br><em>160 kW<\/em><\/td><\/tr><tr><td><\/td><td><\/td><td><\/td><td><\/td><\/tr><tr><td><strong>Other information<\/strong><\/td><td><\/td><td><\/td><td><\/td><\/tr><tr><td>Climate Zone<\/td><td><em>Cfb<\/em><\/td><td>COP <\/td><td><em>3.9\/4.0<\/em><\/td><\/tr><tr><td>CO<sub>2<\/sub> Savings<\/td><td><em>37,700 kg\/year<\/em><\/td><td>Refrigerant<\/td><td><em>R407C<\/em><\/td><\/tr><tr><td><\/td><td><\/td><td><\/td><td><\/td><\/tr><\/tbody><\/table><figcaption class=\"wp-element-caption\">For each individual building, it is a central solution which is why Annex 62 counts it as an <strong>A5 Solution<\/strong>.<\/figcaption><\/figure>\n<\/div>\n\n<div class=\"container container--no-margin\">\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n<\/div><\/div>\n\n\n<div class=\"container\">\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1021\" height=\"756\" src=\"https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/75\/2025\/03\/de014-scheme.png\" alt=\"\" class=\"wp-image-2977\" srcset=\"https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/75\/2025\/03\/de014-scheme.png 1021w, https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/75\/2025\/03\/de014-scheme-300x222.png 300w, https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/75\/2025\/03\/de014-scheme-768x569.png 768w, https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/75\/2025\/03\/de014-scheme-400x296.png 400w\" sizes=\"auto, (max-width: 1021px) 100vw, 1021px\" \/><\/figure>\n<\/div>\n\n<div class=\"container container--no-margin\">\n<p class=\"wp-block-paragraph \"><strong>Description of the technical concept<\/strong><\/p>\n<\/div>\n\n<div class=\"container container--no-margin\">\n<p class=\"wp-block-paragraph \">The hybrid system that was installed consists of two heating components for each building:<\/p>\n<\/div>\n\n<div class=\"container container--no-margin\">\n<ol class=\"wp-block-list\">\n<li>An air-to-water heat pump (<em>Viessmann Vitocal 200-A PRO AWO-AC 201)<\/em>, 32 kW for the smaller building and 64 kW for the larger one<\/li>\n\n\n\n<li>A gas boiler; 60 kW for the smaller building and 160 kW for the larger one.<\/li>\n<\/ol>\n<\/div>\n\n<div class=\"container container--no-margin\">\n<p class=\"wp-block-paragraph \">In each building, the heat pumps provide the base heat. On days that are especially cold, the boilers are activated and deliver the peak load. The smaller heat pump has a COP of 3.9 while the larger one has a COP of 4.0.<\/p>\n<\/div>\n\n<div class=\"container container--no-margin\">\n<p class=\"wp-block-paragraph \">No extensive renovations have been done on the building\u2019s envelope or structure for the HP installation.<\/p>\n<\/div>\n\n\n<div class=\"wp-block-group is-layout-constrained wp-block-group-is-layout-constrained\"><div class=\"container container--no-margin\">\n<div class=\"wp-block-buttons is-horizontal is-content-justification-center is-layout-flex wp-container-core-buttons-is-layout-b989473c wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button has-custom-width wp-block-button__width-50 has-custom-font-size is-style-outline has-medium-font-size is-style-outline--1\" style=\"text-transform:none\"><a class=\"wp-block-button__link has-vivid-cyan-blue-color has-white-background-color has-text-color has-background has-text-align-center wp-element-button\" href=\"https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/75\/2025\/03\/de014fact-sheet-hamburg.pdf\" style=\"border-radius:5px\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"84\" class=\"wp-image-2196\" style=\"width: 300px;\" src=\"https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/75\/2024\/02\/fact-sheet-button-pic.png\" alt=\"\" srcset=\"https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/75\/2024\/02\/fact-sheet-button-pic.png 845w, https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/75\/2024\/02\/fact-sheet-button-pic-300x84.png 300w, https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/75\/2024\/02\/fact-sheet-button-pic-768x215.png 768w, https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/75\/2024\/02\/fact-sheet-button-pic-400x112.png 400w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><\/div>\n<\/div>\n<\/div>\n\n<div class=\"container container--no-margin\">\n<p class=\"has-text-align-center wp-block-paragraph \"><strong>DE014 &#8211; <strong>Hybrid Solution fot two MFBs in Hamburg<\/strong><\/strong><\/p>\n<\/div><\/div>\n<\/div>\n\n\n<div class=\"container container--no-margin\">\n<p class=\"wp-block-paragraph \">Case study delivered by: Bundesverband W\u00e4rmepumpe bwp <a href=\"https:\/\/b2electrification.org\/ravens-crossing-how-community-went-all-electric\"><\/a><a href=\"https:\/\/www.waermepumpe.de\/presse\/referenzobjekte\/bwp-datenbank\/vom-fossilen-fernwaermenetz-zur-gruenen-quartiersloesung\/\"><\/a><a href=\"https:\/\/www.waermepumpe.de\/presse\/referenzobjekte\/bwp-datenbank\/hybridloesung-fuer-zwei-hamburger-mehrfamilienhaeuser\/\">BWP-Datenbank | Bundesverband W\u00e4rmepumpe (BWP) e.V.<\/a><\/p>\n<\/div><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Free and Hanseatic City of Hamburg, Germany The landlords of two multi-family buildings (MFBs) in the Schnelsen district in Hamburg&#8230;<\/p>\n","protected":false},"author":41,"featured_media":0,"menu_order":0,"template":"","filters":[],"markets":[24],"applications":[7,41],"class_list":["post-2975","case_studies","type-case_studies","status-publish","hentry","markets-germany","applications-buildings","applications-multi-family-buildings"],"acf":[],"_links":{"self":[{"href":"https:\/\/heatpumpingtechnologies.org\/project62\/wp-json\/wp\/v2\/case_studies\/2975","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/heatpumpingtechnologies.org\/project62\/wp-json\/wp\/v2\/case_studies"}],"about":[{"href":"https:\/\/heatpumpingtechnologies.org\/project62\/wp-json\/wp\/v2\/types\/case_studies"}],"author":[{"embeddable":true,"href":"https:\/\/heatpumpingtechnologies.org\/project62\/wp-json\/wp\/v2\/users\/41"}],"version-history":[{"count":2,"href":"https:\/\/heatpumpingtechnologies.org\/project62\/wp-json\/wp\/v2\/case_studies\/2975\/revisions"}],"predecessor-version":[{"id":3019,"href":"https:\/\/heatpumpingtechnologies.org\/project62\/wp-json\/wp\/v2\/case_studies\/2975\/revisions\/3019"}],"wp:attachment":[{"href":"https:\/\/heatpumpingtechnologies.org\/project62\/wp-json\/wp\/v2\/media?parent=2975"}],"wp:term":[{"taxonomy":"filters","embeddable":true,"href":"https:\/\/heatpumpingtechnologies.org\/project62\/wp-json\/wp\/v2\/filters?post=2975"},{"taxonomy":"markets","embeddable":true,"href":"https:\/\/heatpumpingtechnologies.org\/project62\/wp-json\/wp\/v2\/markets?post=2975"},{"taxonomy":"applications","embeddable":true,"href":"https:\/\/heatpumpingtechnologies.org\/project62\/wp-json\/wp\/v2\/applications?post=2975"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}