4 ms·
heat pump are highly inefficient if outside temp gets below ~5 degC and that's what happening right now on most of Europe ( incl. southern europe, I saw spain m
by flal_ 6y ago
heat pump are highly inefficient if outside temp gets below ~5 degC and that's what happening right now on most of Europe ( incl. southern europe, I saw spain mentionned here ... )
- cjg_ 6y agoNot less efficient than just using electricity. At -20C you get 1:1 electricity to heat.
- wil421 6y agoMost heat pumps in the US have emergency heating that’s basically the same as electric. I believe even my gas furnace has an electric backup. It should be the same in Europe and it will work in case the temp drops too low.
- epistasis 6y agoHeat pumps are always at least as efficient as resistive heating, but do have less efficacy when the ambient temperature goes below their design parameters. Standard heat pumps these days work great even at 5C, at least any one that I have seen. The H2i line from Mitsubishi maintains 76% of its COP down to -25C (-13F).
- fulafel 6y agoJust the heat pumps sold to warm countries, others do ok in -20C and even below (eg COP 1.5 at -25C).