... water heater 1.High efficiency,safety,reliable 2.Automatic defrost 3.Safety,reliable 4.R407c & R410a Refrigerant heat pump water ... high as 60%~80% compared with oil boiler, gas boiler, coal boiler, electricity water heater etc.Environment-friendly: ODP---Ozone ... weightkg680Package weightkg865Outside temperature is 20 /15. Input water temperature is 15, output is 55 air source heat pump water heater