1. Heat pump, air source, water heater 2. Restaurant,hotel, villas, etc. 3.high efficiency, enviroment friendly 4.R407C,R134a RWC series air source heat ... pump water heater Brief introductionAir source heat pump water heater is one of the ... to 3~6kWh with the consumption of only 1kWh,save 50~80% electric costs; no fuel transportation costs and low ...