Employs Digital growth valve to exactly Regulate the move of R290 refrigerant into your evaporator as well as a 4-way valve to divert the refrigerant movement to the defrost operation The refrigerant in an air-source heat pump absorbs heat from the outside air and turns right into a fuel by https://socials360.com/story11007526/5-tips-about-r290-propane-heat-pump-you-can-use-today