Posted 6/16/2017 01:22 (#6073628 - in reply to #6072985) Subject: RE: heat pump.....
NW Washington
It depends on where you live and what you want to do. In cold climates an air to air heat pump will need a back up when it get real cold. A ground source heat pump is really efficient and low cost way to heat and cool, but the up front cost is very costly.
heat pump.....
