Some newer ones can operate down to -22F. I’m in a place that hits those kind of of temps so I’d want a wood stove as a backup. I guess a ground source heat pump might be a better fit around here.
For what it’s worth, heat pump manufacturers know this, and usually include a way to generate heat. My parents use a heat pump system, and it has a radiator that only turns on when the outside temperature drops below whatever the efficiency threshold is. Radiators are cheap and easy to build, so they’re not difficult to include in an existing heat pump setup.
Some newer ones can operate down to -22F. I’m in a place that hits those kind of of temps so I’d want a wood stove as a backup. I guess a ground source heat pump might be a better fit around here.
For what it’s worth, heat pump manufacturers know this, and usually include a way to generate heat. My parents use a heat pump system, and it has a radiator that only turns on when the outside temperature drops below whatever the efficiency threshold is. Radiators are cheap and easy to build, so they’re not difficult to include in an existing heat pump setup.