... the air, and transfers the heat into the water. It can still work when the air temperature ... is -5oC, and provide 60oC hot water. Features:1. Environment friendly: no air pollution, ... no person to take care of .4. World famous heat pump compressor;5. Suitable Places: hot water supply ... Hotels, Villas, Hair Salon, Foot Massage, etc; hot water source for swimming pool, factory , farm, etc.6 ...