alt Hacker NewsFor "human" temperatures don't they just degrade back to the efficiency of resistive heating? Or are some places actually cold enough to push the factor below 1?
For "human" temperatures don't they just degrade back to the efficiency of resistive heating? Or are some places actually cold enough to push the factor below 1?
> Or are some places actually cold enough to push the factor below 1?
Probably some far north, but not that many. My Kaiteki 6600 has[1] a SCOP of 5.1 and a factory guaranteed COP at -25C (-13F) of 3.1.
[1]: https://mee.no/privat/produktkategori/luft-luft-varmepumper/...