... friendly 4.R407C,R134a RWC series air source heat pump water heater Brief introductionAir source heat pump water heater is one of ... ~6kWh with the consumption of only 1kWh,save 50~80% electric costs; no fuel transportation costs and low maintenance costs3. Convenient ... for Hotels, Villas, Hair Salon, Foot Massage, etc; hot water source for swimming pool, factory , farm, etc.6. Heating capacity: 18kw ...