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Heat pumps can't take the cold? Nordics debunk the myth
(techxplore.com)
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this post was submitted on 01 Nov 2023
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I have an air sourced heat pump and it gets to -35C for a few weeks at time here. When it's that cold it does produce heat but your breath is hotter. There's no point in running it as it just doesn't make any kind of useful heat. Below -10C the amount of heat it produces noticeably tapers off.