what do you mean?
They kinda work like a reverse refrigerator. A fridge takes heat out from the inside and moves it to the outside. A heat pump does the opposite.
> Actual heating systems can be better than 100% efficient, while crypto mining or cinebench or whatever is <100%.
The intricacies of why a crypto minor is less than 100% efficient when working as a heater are easily deduced, unless you’re precisely the sort of midwit that likes to leave replies such as the one you left.