{"id":3763,"date":"2026-08-07T12:34:50","date_gmt":"2026-08-07T12:34:50","guid":{"rendered":"https:\/\/heatpumpingtechnologies.org\/project62\/?p=3763"},"modified":"2026-08-07T12:34:51","modified_gmt":"2026-08-07T12:34:51","slug":"from-can-it-work-to-how-can-it-scale-project-62-shares-its-final-results","status":"publish","type":"post","link":"https:\/\/heatpumpingtechnologies.org\/project62\/from-can-it-work-to-how-can-it-scale-project-62-shares-its-final-results\/","title":{"rendered":"From “can it work?” to “how can it scale?”: Project 62 shares its final results"},"content":{"rendered":"
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On 25 June 2026, the IEA HPT Project 62 team held its final webinar, drawing a line under three years of work on heat pumps for multi-family residential buildings in dense cities. Over roughly two hours, partners from across Europe presented what the project set out to answer, what the evidence now shows, and where the work goes next.<\/p>\n<\/div>\n\n

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One idea ran through the whole session. For heat pumps in multi-family buildings, the problem is no longer finding a solution. The problem is choosing the right one. Or, as the closing put it: the question is no longer “can it work?” but “how can it scale?”<\/p>\n<\/div>\n\n

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The audience reflected the project’s international reach: around 60 people from 20 countries across five continents. The participating countries were well represented, with Germany, France and Belgium among the largest groups, but interest stretched far beyond them, with sign-ups from Canada, the United States, Italy, Switzerland, the Netherlands, Sweden, Austria, Spain, Norway, the United Kingdom, Finland and Ukraine, and from as far afield as Japan, India, Indonesia, New Zealand and Brazil.<\/p>\n<\/div>\n\n

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What Project 62 set out to do<\/strong><\/p>\n<\/div>\n\n

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Project 62 sits in a line of IEA HPT work on the heating transition in apartment buildings. Where the earlier Annex 50 asked which solutions are theoretically possible, Project 62 asked which of them actually fit real urban buildings, with all their constraints: limited space, noise restrictions, domestic hot water demand, split ownership, and a long list of stakeholders who each have to agree.<\/p>\n<\/div>\n\n

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The team worked in a deliberately holistic way, letting a theoretical classification and real-world case studies refine each other. The classification framed practice, and evidence from the field reshaped the theory.<\/p>\n<\/div>\n\n

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A shared language: the five solution families<\/strong><\/p>\n<\/div>\n\n

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A central output is a general classification that gives the sector a common vocabulary. Solutions are grouped into five families along a spectrum from whole-building to individual-room systems:<\/p>\n<\/div>\n\n

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