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Heat pumps can't take the cold? Nordics debunk the myth (techxplore.com)

submitted 1 year ago by [email protected] to c/[email protected]

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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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[–] [email protected] 3 points 1 year ago (1 children)

So my question with heat pumps is more how much does humidity effect the efficiency? Where I live is high elevation, has cold winters, but the air is dry as fuck. Single digit humidity for a month wouldn't be unusual.

My understanding is that heat pumps work best with humidity since moving moisture is part of how the heat is produced. When does a reasonably priced heat pump start falling off in efficiency?

[–] [email protected] 7 points 1 year ago

They are just AC units in reverse. The biggest effect humidity is going to have is on how much condensation is going to form on the exterior radiator. That'll form frost that'll have to be melted in a defrosting cycle. That'll decrease performance and efficacy. Low humidity should keep that to a minimum.