3 ms·
In the sense that a good heat pump can be over 400% efficient but electrical resistance heat is 100% efficient. (ok, it's not scientifically correct to say tha
by Johnny555 5y ago
In the sense that a good heat pump can be over 400% efficient but electrical resistance heat is 100% efficient.
(ok, it's not scientifically correct to say that anything is over 100% efficient, and COP gets lower as the temperature decreases, but a good minisplit can still deliver a COP close to 2.0 down to 0 degrees F)
- makomk 5y agoArguably heat pumps would've made this worse, because although they decrease total power usage they increase the rate at which power usage goes up during cold spells, making the ratio of normal power usage to peak worst-case power usage even larger and harder for the grid to deal with. In systems that are well sized for the climate, this often means outright falling back to inefficient resisitive heating with all the resulting electricity demand from that.