My home was designed to be heated by one 18,000 btu heat pump. The single head in our open living space has kept the whole house comfortable for all but a few hours of the last 6 years. It even kept operating at 20 deg. below zero. Upstairs bedrooms are about 5 degrees cooler in the winter, and because heat rises, the cooling does not really reach them in the summer. A small second unit upstairs would fix this. As long as a system is designed properly, heat pumps work well in this climate and can really cut carbon pollution!
