... air source, water heater 2. Restaurant,hotel, villas, etc. 3.high efficiency, enviroment friendly 4.R407C,R134a RWC series air source heat ... pump water heaterBrief introductionAir source heat pump water heater is one of ... hot water source for swimming pool, factory , farm, etc.6. Heating capacity: 18kw,35kw,70kw. RWC series air source heat pump ...