(12-28-2022, 08:41 AM)jagibelieve Wrote:

(12-27-2022, 11:06 PM)mikesez Wrote: Heat pumps are basically useless once the air temp is below 40. In Florida a small resistance heater is fine as a supplement for the rare freezing day.  In NC you'd want some sort of furnace or fireplace as a backup.  Maybe a space heater. 
But that heat pump will be back to kicking butt and saving you big bucks once the air temp is back above 40.

Not true.  Our heat pump maintains a comfortable 68 degrees in our home with outside temps in the low 20's.

In the US heat pumps are customarily installed with a resistance heating coil in the air handler.  If your air handler is on a 2 pole or 240V breaker, that's why.  The whole thing is sold as a package without explanation of the components.  I would be very surprised if your home did not have this.
Below 40F, the heat pump starts moving much less heat, even though the home needs more.  Below 25F, it moves no heat at all.  Below 32F, there is the possibility of icing over the coils, if the air is humid, which usually makes the thing shut down

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