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Heat pumps twice as efficient as fossil fuel systems in cold weather, study finds (www.theguardian.com)

submitted 9 months ago by [email protected] to c/[email protected]

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https://www.cell.com/joule/fulltext/S2542-4351(23)00351-3

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[–] [email protected] 4 points 9 months ago

As long as you can keep the evaporator above the evaporation temperature of your compressed refrigerant, you’re golden.

Also keeping the evaporator from getting covered in ice where it doesn't work. Yeah you can defrost but in certain weather it's just going to ice up immediately.