Earlier quoted context omitted.
Air source heat pumps become less effective as the temperature drops. At 17F, you lose about 25% of BTU capacity as compared to 48F. Hot water is another huge use — it’s really expensive to use electricity for that purpose.
Heat pump water heaters exist. "Heat pump water heaters use electricity to move heat from one place to another instead of generating heat directly. Therefore, they can be two to three times more energy efficient than conventional electric resistance water heaters. To move the heat, heat pumps work like a refrigerator in reverse." https://www.energy.gov/energysaver/water-heating/heat-pump-w...
Yeah I just put one of those in, mostly because I didn't want to run a gas line. And feel a lot more competent running a 30amp circuit than cutting and sealing a hole in the roof.
Works fine.
Also friend in Florida says she has a heat pump with an air handler. It produces heat in the winter and cooling in the summer.
Not the end of the world.