3 ms·
> I don't think that's quite the right energy balance for heat pumps ;) It's exactly right. A good heat pump will have a coefficient of performance (COP) of 5,
by dashundchen 8y ago
> I don't think that's quite the right energy balance for heat pumps ;)
It's exactly right. A good heat pump will have a coefficient of performance (COP) of 5, which means for every watt of electricity put in, 5 watts of heat is moved from outside to inside - effectively an efficiency of 500%. While resistance electric heat and fossil fuel can never give more heat than the energy put in.
https://en.wikipedia.org/wiki/Heat_pump#Performance_considerations https://en.wikipedia.org/wiki/Heat_pump#Performance_consider...
- zaroth 8y ago5 is highly optimistic. Real world average efficiency is closer to 2.5 (lower in colder climates) because there are a lot of variables you have to get exactly right to hit that 5 COP, and they very rarely line up. Source: I have a Fujitsu 36K BTU cold climate 4-zone system installed two years ago to replace electric baseboard heat. [1] [1] - http://www.fujitsugeneral.com/us/products/multi/2-3-4rooms/aou36rlxfzh.html http://www.fujitsugeneral.com/us/products/multi/2-3-4rooms/a...