We have a adorable little 11k btu Rinnai in the basement and a single Fujitsu 15RLS3H (if I remember right) on first floor. It heats fine. This is a well insulated 1800 sq ft house. We do have a wood stove I don’t NEED to use but it’s good to have.

I would say I wouldn’t want just the heat pump. I’d want at least a gas backup or wood stove.