{"id":2235,"date":"2024-02-14T11:33:02","date_gmt":"2024-02-14T11:33:02","guid":{"rendered":"https:\/\/heatpumpingtechnologies.org\/annex62\/?page_id=2235"},"modified":"2026-03-18T10:40:52","modified_gmt":"2026-03-18T10:40:52","slug":"ground-source-heating-replaces-oil-in-this-former-finnisch-defence-forces-building","status":"publish","type":"case_studies","link":"https:\/\/heatpumpingtechnologies.org\/project62\/case-studies\/ground-source-heating-replaces-oil-in-this-former-finnisch-defence-forces-building\/","title":{"rendered":"Ground source heating replaces oil in this Former Finnisch Defence Forces Building"},"content":{"rendered":"<div class=\"container container--no-margin\">\n<p class=\"wp-block-paragraph \"><strong>Kemi, Finland<\/strong><\/p>\n<\/div>\n\n<div class=\"container container--no-margin\">\n<p class=\"wp-block-paragraph \">In Kemi, Finland, an old apartment building built by the Finnish Defence Forces required extensive renovation. Instead of by oil, the building would now be heated by ground source heating.<\/p>\n<\/div>\n\n<div class=\"container container--no-margin\">\n<p class=\"wp-block-paragraph \"><\/p>\n<\/div>\n\n<div class=\"container\">\n<figure class=\"wp-block-image aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"332\" height=\"199\" src=\"https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/75\/2024\/02\/fi003-house.jpg\" alt=\"\" class=\"wp-image-2236\" style=\"aspect-ratio:1.6289592760180995;width:724px;height:auto\" srcset=\"https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/75\/2024\/02\/fi003-house.jpg 332w, https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/75\/2024\/02\/fi003-house-300x180.jpg 300w\" sizes=\"auto, (max-width: 332px) 100vw, 332px\" \/><\/figure>\n<\/div>\n\n<div class=\"container container--no-margin\">\n<p class=\"wp-block-paragraph \"><strong>Lessons learned\u00a0<\/strong><\/p>\n<\/div>\n\n<div class=\"container container--no-margin\">\n<ul class=\"wp-block-list\">\n<li>Savings of over 10,000\u20ac per year<\/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<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>Kemi, Finland<\/em><\/td><td>Number of HP<\/td><td><em>1<\/em><\/td><\/tr><tr><td>Construction<\/td><td>retrofit<\/td><td>Installed power<\/td><td><em>60kW<\/em><\/td><\/tr><tr><td>Heat distribution<\/td><td><em>underfloor heating<\/em><\/td><td>Operation mode<\/td><td><em>monoenergetic<\/em><\/td><\/tr><tr><td>Heated area<\/td><td><em>640 m\u00b2<\/em><\/td><td>Heat source<\/td><td><em>ground<\/em><\/td><\/tr><tr><td>No. of apartments<\/td><td><em>14<\/em><\/td><td>Function<\/td><td>Space Heating<\/td><\/tr><tr><td>level of insulation<\/td><td>&#8211;<\/td><td><\/td><td><\/td><\/tr><tr><td><\/td><td><\/td><td><\/td><td><\/td><\/tr><tr><td><strong>Heating sytem<\/strong><\/td><td><\/td><td><strong>Domestic Hot Water<\/strong><\/td><td><\/td><\/tr><tr><td>Heat demand<\/td><td><em>&#8211; kWh \/ (m\u00b2a)<\/em><\/td><td>DHW demand<\/td><td><em>&#8211; kWh \/ (m\u00b2a)<\/em><\/td><\/tr><tr><td>Type of system<\/td><td><em>central<\/em><\/td><td>Type of system<\/td><td><em>central<\/em><\/td><\/tr><tr><td>Heating<br>temperature<\/td><td><em>35 \u00b0C<\/em><\/td><td>Max. temperature<\/td><td><em>110 \u00b0C working temp.<\/em><\/td><\/tr><tr><td><\/td><td><\/td><td>Circulation system <\/td><td>&#8211;<\/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><em>additional heating units<\/em><\/td><td><em>3000l superheat tank (10kW)<\/em><\/td><td>COP<\/td><td><em>3<\/em><\/td><\/tr><tr><td>Capacity<\/td><td><em>6<\/em><\/td><td>Refrigerant<\/td><td><em>R410A<\/em><\/td><\/tr><tr><td><\/td><td><\/td><td><\/td><td><\/td><\/tr><\/tbody><\/table><\/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 \">As part of the overhaul, the building\u2019s energy systems were upgraded, and the old oil heating system was replaced by locally sourced ground source heating. At the same time, water-circulating radiator heating was replaced with resident-friendly floor heating. In a 14-apartment building, a 3,000-liter super heat tank and a ground source heat pump from the Oilon pump range were installed instead of two oil boilers. According to Arto Heikkinen, chairman of the board of the housing association, the financing base for the building renovation was covered by switching away from oil.<\/p>\n<\/div>\n\n<div class=\"container container--no-margin\">\n<p class=\"wp-block-paragraph \">If we compare the oil bill of approx. 20,000 euros year before the renovation to that, that with ground source heating, for example, 4,000 euros are needed for the electricity bill, the investment is worthwhile, says Heikkinen. Switching from oil to ground source heat requires more electricity because the pumps are powered by electricity. Ground source heating is an investment of about 50,000 euros including VAT in this size of a property.<\/p>\n<\/div>\n\n<div class=\"container container--no-margin\">\n<p class=\"wp-block-paragraph \">When the annual savings are well over 10,000 euros, the ground source heat investment will pay for itself in a few years. The ground source heat pump&#8217;s COP is 3, so one kilowatt hour of electricity produces three kwh of heat, says Mika Poikela, the CEO of Engineering office Warmal\u00e4mp\u00f6 Oy, who was responsible for the ground source heat contracting of the site. Ground source heat can be installed in a building with a water circulation heating system.<\/p>\n<\/div>\n\n<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-75 is-style-outline is-style-outline--1\"><a class=\"wp-block-button__link has-vivid-red-color has-white-background-color has-text-color has-background has-medium-font-size has-text-align-center has-custom-font-size wp-element-button\" style=\"border-radius:5px;text-transform:none\"><img loading=\"lazy\" decoding=\"async\" width=\"845\" height=\"237\" 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: 845px) 100vw, 845px\" \/> not yet available<\/a><\/div>\n<\/div>\n<\/div>\n\n<div class=\"container container--no-margin\">\n<p class=\"has-text-align-center wp-block-paragraph \">FI003 Former Finnish Defence Building&nbsp; <\/p>\n<\/div>\n\n<div class=\"container container--no-margin\">\n<p class=\"wp-block-paragraph \"><\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Kemi, Finland In Kemi, Finland, an old apartment building built by the Finnish Defence Forces required extensive renovation. Instead of&#8230;<\/p>\n","protected":false},"author":41,"featured_media":0,"menu_order":0,"template":"","filters":[],"markets":[22],"applications":[],"class_list":["post-2235","case_studies","type-case_studies","status-publish","hentry","markets-finland"],"acf":[],"_links":{"self":[{"href":"https:\/\/heatpumpingtechnologies.org\/project62\/wp-json\/wp\/v2\/case_studies\/2235","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":4,"href":"https:\/\/heatpumpingtechnologies.org\/project62\/wp-json\/wp\/v2\/case_studies\/2235\/revisions"}],"predecessor-version":[{"id":3570,"href":"https:\/\/heatpumpingtechnologies.org\/project62\/wp-json\/wp\/v2\/case_studies\/2235\/revisions\/3570"}],"wp:attachment":[{"href":"https:\/\/heatpumpingtechnologies.org\/project62\/wp-json\/wp\/v2\/media?parent=2235"}],"wp:term":[{"taxonomy":"filters","embeddable":true,"href":"https:\/\/heatpumpingtechnologies.org\/project62\/wp-json\/wp\/v2\/filters?post=2235"},{"taxonomy":"markets","embeddable":true,"href":"https:\/\/heatpumpingtechnologies.org\/project62\/wp-json\/wp\/v2\/markets?post=2235"},{"taxonomy":"applications","embeddable":true,"href":"https:\/\/heatpumpingtechnologies.org\/project62\/wp-json\/wp\/v2\/applications?post=2235"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}