{"id":2899,"date":"2025-03-18T10:02:31","date_gmt":"2025-03-18T10:02:31","guid":{"rendered":"https:\/\/heatpumpingtechnologies.org\/annex62\/?page_id=2899"},"modified":"2025-09-12T14:38:08","modified_gmt":"2025-09-12T14:38:08","slug":"ca005-oso","status":"publish","type":"case_studies","link":"https:\/\/heatpumpingtechnologies.org\/project62\/case-studies\/ca005-oso\/","title":{"rendered":"CA005 OSO"},"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\">The NZER Challenge Winners<\/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 \">OSO, which means bear in Spanish, is a mixed-use development consisting of two buildings with commercial units on the ground floor and residential units above. Some small standalone amenity and commercial buildings are located between and behind the two larger buildings.<\/p>\n<\/div>\n\n<div class=\"container\">\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><div class=\"container container--no-margin\">\n<p class=\"wp-block-paragraph \"><\/p>\n<\/div><cite>\u201cOSO is exceptional because the construction details, mechanical design, and the equipment and materials used are all simple, readily available, and easy to put together. Vidorra\u2019s goal is to have any contractor in Canada review the plans and specifications and easily understand them. For this development, there was no extra training required for any tradesperson on the job site. Every detail was familiar to them and part of their standard trade skill set. For widespread adoption of high-performance buildings, this approach is essential..\u201d &#8211; Rod Nadeau, Co-owner, Vidorra Developments ltd.<\/cite><\/blockquote>\n<\/div>\n\n<div class=\"container container--no-margin\">\n<p class=\"wp-block-paragraph \">A unique aspect of this building is the integration of the heating and cooling system with the ventilation system. This integrated system provides heating and cooling for both the units and the corridors. For a previous project, this mechanical design strategy has proven successful in keeping occupants comfortable during the June 2021 heat wave and the December 2021 cold snap.<\/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=\"344\" height=\"246\" src=\"https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/75\/2025\/03\/ca005-constr.png\" alt=\"\" class=\"wp-image-2901\" style=\"width:412px;height:auto\" srcset=\"https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/75\/2025\/03\/ca005-constr.png 344w, https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/75\/2025\/03\/ca005-constr-300x215.png 300w\" sizes=\"auto, (max-width: 344px) 100vw, 344px\" \/><figcaption class=\"wp-element-caption\">Picture: ZEIC<\/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>Applying lessons learned from a previous high-performance building project is critical in achieving cost-effective results for developers, builders and the design team.<\/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(s)<\/strong><\/td><td><\/td><td><strong>Heat Pump and Source<\/strong><\/td><td><\/td><\/tr><tr><td>Location<\/td><td><em>Golden, Canada<\/em><\/td><td>Number of HP<\/td><td><em>2 for SH<\/em><br><em>10 (DHW)<\/em><\/td><\/tr><tr><td>Construction<\/td><td><em>2023<\/em><\/td><td>Operation mode<\/td><td><em>monoenergetic<\/em><\/td><\/tr><tr><td>Heated area<\/td><td><em>2250 m\u00b2<\/em><\/td><td>Heat source<\/td><td><em> air<\/em><\/td><\/tr><tr><td>No. of apartments<\/td><td><em>East: 30<br>West: 28<\/em><\/td><td>Type of system<\/td><td><em>central<\/em><\/td><\/tr><tr><td>Level of insulation<\/td><td><em>good<\/em><\/td><td>Model<\/td><td><em>Mitsubishi City Multi (SH)<\/em><br><em>SANCO2<sup>TM<\/sup> (DHW)<\/em><\/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>Installed power<\/td><td><em>1 x 35 kW<br>1 x 28 kW<\/em><\/td><td>Storage tanks<\/td><td><em>3 x 454 l tank<br>1 x 454 l swing tank<\/em><\/td><\/tr><tr><td>Thermal energy<br>use intensity<\/td><td><em>7.7 kWh\/m2 per year<\/em><\/td><td>Additional heating<\/td><td><em>tankless water heater<\/em> <em>(EL)<\/em><\/td><\/tr><tr><td>Annual cooling<br>demand<\/td><td><em>1.4<\/em> <em>kWh\/m2 per year<\/em><\/td><td><\/td><td><\/td><\/tr><tr><td>Return air temp.<\/td><td><em>22\u00b0C (year-round)<\/em><\/td><td><\/td><td><\/td><\/tr><tr><td>Additional<br>heating<\/td><td><em>Baseboard heaters (500W)<br>in each flat<\/em><\/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>Dfb<\/em><\/td><td>Refrigerant (SH)<\/td><td>R410A<\/td><\/tr><tr><td><\/td><td><\/td><td>Refrigerant (DHW)<\/td><td>CO<sub>2<\/sub><\/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<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\/ca005-scheme-1.png\" alt=\"\" class=\"wp-image-2903\" srcset=\"https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/75\/2025\/03\/ca005-scheme-1.png 1021w, https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/75\/2025\/03\/ca005-scheme-1-300x222.png 300w, https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/75\/2025\/03\/ca005-scheme-1-768x569.png 768w, https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/75\/2025\/03\/ca005-scheme-1-400x296.png 400w\" sizes=\"auto, (max-width: 1021px) 100vw, 1021px\" \/><figcaption class=\"wp-element-caption\">The swing tank, in combination with the tankless water heater, maintains the temperature of the hot water in the recirculation loop.<\/figcaption><\/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 \">Space Heating and Cooling:<\/p>\n<\/div>\n\n<div class=\"container container--no-margin\">\n<p class=\"wp-block-paragraph \">A 35kW (10-ton) and a 28kW (8-ton) <em>Mitsubishi City Multi <\/em>heat pump are connected to the Energy Recovery Ventilator\u2019s (ERV) heating and cooling coil. The heat pumps use R410A refrigerant and can provide heating in outdoor temperatures as low as -25\u00b0C. The ERV includes a boost mode which doubles the airflow rate when more cooling (or heating) energy is required. The control strategy is to maintain the return air at 22\u00b0C year-round and use the ERV\u2019s boost mode for additional cooling only.<\/p>\n<\/div>\n\n<div class=\"container container--no-margin\">\n<p class=\"wp-block-paragraph \">&nbsp;If supplemental or back-up heating I required, the occupants can rely on a 500W electric baseboard heater installed in each room along the perimeter of the building. The ERV also has a (heat exchanger) bypass mode which allows it to to cool the units with outdoor air at night when the outdoor temperature is 2\u00b0C lower than the indoor temperature.<\/p>\n<\/div>\n\n<div class=\"container container--no-margin\">\n<p class=\"wp-block-paragraph \">The ground-floor commercial units have mini-split heat pumps for backup heating and cooling. Their primary heating and cooling is supplied by the central ventilation system.<\/p>\n<\/div>\n\n<div class=\"container\">\n<figure class=\"wp-block-image aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"778\" height=\"681\" src=\"https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/75\/2025\/03\/ca005-hps.png\" alt=\"\" class=\"wp-image-2904\" srcset=\"https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/75\/2025\/03\/ca005-hps.png 778w, https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/75\/2025\/03\/ca005-hps-300x263.png 300w, https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/75\/2025\/03\/ca005-hps-768x672.png 768w, https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/75\/2025\/03\/ca005-hps-400x350.png 400w\" sizes=\"auto, (max-width: 778px) 100vw, 778px\" \/><figcaption class=\"wp-element-caption\">Picture: ZEIC<\/figcaption><\/figure>\n<\/div>\n\n<div class=\"container container--no-margin\">\n<p class=\"wp-block-paragraph \">Domestic Hot Water:<\/p>\n<\/div>\n\n<div class=\"container container--no-margin\">\n<p class=\"wp-block-paragraph \">Each building\u2019s domestic hot water (DHW) system includes five <em>SANCO2<sup>TM<\/sup> <\/em>heat pump water heaters, three 454 l storage tanks and one 454 l swing tank connected to a 36kW <em>Stiebel Eltroon<\/em> tankless water heater. The swing tank, in combination with the tankless water heater, maintains the temperature of the hot water in the recirculation loop. Given the capacity of the tankless water heater, it also serves as a back-up water heater should there be an issue with the heat pump water heaters.<\/p>\n<\/div>\n\n<div class=\"container container--no-margin\">\n<p class=\"wp-block-paragraph \">Four of the heat pumps are wall-mounted under the mechanical penthouse roof\u2019s overhang and the fifth is installed inside the mechanical penthouse to keep the room cool and increase the efficiency of the HP (by providing it warmer ambient air).<\/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\/ca005fact-sheet-oso.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>CA005 &#8211; OSO<\/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: Zero Emissions Innovation Centre (ZEIC) <a href=\"https:\/\/b2electrification.org\/ravens-crossing-how-community-went-all-electric\"><\/a><a href=\"https:\/\/www.zebx.org\/content\/uploads\/2022\/10\/OSO-Case-Study.pdf\"><\/a><a href=\"https:\/\/www.zebx.org\/case-study-oso\/\">Case Study: OSO \u2013 ZEBx<\/a><\/p>\n<\/div><\/div>\n","protected":false},"excerpt":{"rendered":"<p>The NZER Challenge Winners OSO, which means bear in Spanish, is a mixed-use development consisting of two buildings with commercial&#8230;<\/p>\n","protected":false},"author":41,"featured_media":0,"menu_order":0,"template":"","filters":[],"markets":[17],"applications":[7,41],"class_list":["post-2899","case_studies","type-case_studies","status-publish","hentry","markets-canada","applications-buildings","applications-multi-family-buildings"],"acf":[],"_links":{"self":[{"href":"https:\/\/heatpumpingtechnologies.org\/project62\/wp-json\/wp\/v2\/case_studies\/2899","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":3,"href":"https:\/\/heatpumpingtechnologies.org\/project62\/wp-json\/wp\/v2\/case_studies\/2899\/revisions"}],"predecessor-version":[{"id":2933,"href":"https:\/\/heatpumpingtechnologies.org\/project62\/wp-json\/wp\/v2\/case_studies\/2899\/revisions\/2933"}],"wp:attachment":[{"href":"https:\/\/heatpumpingtechnologies.org\/project62\/wp-json\/wp\/v2\/media?parent=2899"}],"wp:term":[{"taxonomy":"filters","embeddable":true,"href":"https:\/\/heatpumpingtechnologies.org\/project62\/wp-json\/wp\/v2\/filters?post=2899"},{"taxonomy":"markets","embeddable":true,"href":"https:\/\/heatpumpingtechnologies.org\/project62\/wp-json\/wp\/v2\/markets?post=2899"},{"taxonomy":"applications","embeddable":true,"href":"https:\/\/heatpumpingtechnologies.org\/project62\/wp-json\/wp\/v2\/applications?post=2899"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}