Efficient low temperature conventional air source heat pumps
Can anyone point to conventional air source heat pumps (not mini-split) that are highly efficient at low temperature? I’m looking for something that will work year round in Rochester, NY, zone 5. (7°F manual J design conditions, but it can hit -5°F worst case.) I’m in the middle of a house re-design, so my old manual J is out of date, but I expect the heating load to be 20-30kbtu/h at 7F.