1. Heat pump, air source, water heater 2. Restaurant,hotel, villas, etc. ... 4.R407C,R134a RWC series air source heat pump water heaterBrief introductionAir source heat pump water heater is ... need no person to take care of .4. World famous heat pump compressor;5. Suitable Places: hot water ... , Villas, Hair Salon, Foot Massage, etc; hot water source for swimming pool, factory , farm, etc.6. Heating ...