this post was submitted on 27 Oct 2024
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I think you're forgetting ground source heat pumps. They'll work fine at -40 because they don't rely on air temperature.
Those are different and that's cheating. It's not what this article is referencing or talking about.
Cheating in what?
Geothermal heatpumps that gather the heat from underground below the frost line are different and much more time and space extensive than a regular heatpump.