household air source heat pump performance characteristics , Energy economy Safe and reliable Green Stable Easy to install household air source heat pumpair source heat pump water heater1-air source heta pump water heater :Painted tank or stainless steel tank for choose. 2-air source heta pump water heater :100L, 150L, 200L, 260L, 320L, 500L water tank (storage cylinder). 3-air source heta pump ...