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Heat pumps sold so fast in Maine, the state just upped its target
(www.canarymedia.com)
This is a most excellent place for technology news and articles.
It probably wouldn’t run because the air its ingesting to cool is already cold, but if you bypassed the thermostat, sure.
Because they’re not designed to work that way I’m sure their efficiency would be low/non existent in actually cold temps.
Early heat pumps could only work to like 30F or so. New ones are much, much better.