... . environment friendly; 4. R22,R410a,R134a Air source heat pump water heaterBrief introductionAir source heat pump water heater is one of the ... can still work when the air temperature is -5°C, and provide 60°C hot water.Features:1. Environment friendly: no air ... for Hotels, Villas, Hair Salon, Foot Massage, etc; hot water source for swimming pool, factory , farm, etc.6. Heating capacity: 18kw ...