3 ms·
It's not necessarily the heat pump, but the internal remodelling to fit larger rads/underfloor heating, and better insulation. Fundamentally, after that you're
by yodelshady 3y ago
It's not necessarily the heat pump, but the internal remodelling to fit larger rads/underfloor heating, and better insulation.
Fundamentally, after that you're using an energy source 3x as expensive as gas, so... any time the COP is less than 3 you're losing money. Oh, guess when you need the most heating? That's right, when it's cold. I don't give a flying what the COP at 10 C is, because waste heat from everyday activities keeps the house warm at that. I care about the COP at -2. On a becalmed day when the output of circa. 24 GW of wind capacity is < 1 GW. This absolutely happens.
- mytailorisrich 3y ago> On a becalmed day when the output of circa. 24 GW of wind capacity is < 1 GW. This absolutely happens. 2040s things: "Sorry I cannot drive to work today as there is no wind since yesterday". ;)
- fy20 3y agoFor modern heat pumps (e.g. Daikin Altherma) the COP at -2c will be around 2.8-3. They operate down to -25c in heat pump mode, then automatically switch over to resistive heating. I live in Lithuania (-20c and lower during winter is not uncommon) and almost all new houses have them. You can no longer use gas for heating in new builds. 3kW of solar generates more than enough power (with net metering) to run a heat pump over the course of a year for the average size house (150m2)