If heat pumps don't work in the winter, how come Sweden has (as of 2022) 2.2 million heat pumps (209 per 1000 residents) and Finland 1.4 million (251 per 1000 residents)?
https://publications.jrc.ec.europa.eu/repository/bitstream/J...
https://publications.jrc.ec.europa.eu/repository/bitstream/J...
Most of Europe isn't Sweden, and many industry manufacturing doesn't run on heat pumps, but on gas.