this post was submitted on 01 Nov 2023
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Heat pumps can't take the cold? Nordics debunk the myth::By installing a heat pump in his house in the hills of Oslo, Oyvind Solstad killed three birds with one stone, improving his comfort, finances and climate footprint.

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[โ€“] [email protected] 5 points 1 year ago (6 children)

I want to understand what happens when it's too cold out. And just running in pure air sourced HP mode, without supplemental heat.

Does it keep running at 100% but produces no heat? Limited heat? Does the house get colder and colder until everyone turns into a popsicle?

Or does it only heat the house to 18c instead of 20c?

In a climate where the low is -10c, how well does it work?

[โ€“] [email protected] 2 points 1 year ago

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.

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