Oxford study proves heat pumps triumph over fossil fuels in the cold::Published Monday in the scientific journal Joule, the research found that heat pumps are two to three times more efficient than their oil and gas counterparts, specifically in temperatures ranging from 10 C to -20 C.
brb putting in my window unit from the outside
You’d need to collect the condensate, but that would actually work quite well.
Also most of the electronics on the cold side aren’t designed to be exposed to the elements, so that would be a problem