[lgjhn23]

Heat pumps down to about 35 degrees, then over to propane from there on down.
and FJB.....

[Tell It Right]

Heat pumps down to about 35 degrees, then over to propane from there on down. and FJB.....

Same here. I save a lot with a variable speed heat pump, supplemented with electric heat strips. It’d be cheaper to supplement with a natural gas furnace if I didn’t have solar and battery storage usually having enough charge to power the heat strips through most of the night.

During the warm half of the year I save more money by directing the cold air output from my hybrid water heater to an intake receiver of my central HVAC. This allows my variable speed heat pump to stay in low speed for more hours of the day.

[Chickensoup]

Here there is heat pump over to k-1