I'm talking about 0F because you brought up the average. Regardless. Night time temps fluctuate at the bottom of the COP range and then might even need resisti

I'm talking about 0F because you brought up the average. Regardless. Night time temps fluctuate at the bottom of the COP range and then might even need resistive when the heating demand is the absolute greatest. Plus you would need to build an outdoor shelter for the outside unit to handle snow. Then you have to hope the power grid holds up to all these people on resistive power. You can't just look at the happy path of.. well on average it works out great. The system seems to get quite complicated in extreme environments.