Household Series Air Source Heat Pump Water Heater FEATURES: 1) Safe: the separation of water and electricity confirms the safety to users. No rise, no venomous gas put out and burnt. 2) Efficient and energy saving: absorbing heat energy from air, the average COP of one year is over 3.5, so the energy cost is only1/4 to 1/3, which saved lots of electricity cost. 3) Environmental protecting: the most of refrigerants are environmental protection, and the value of GWP and ODP is 0. 4) Comfortable: controlled automatically, auto-defrosting in winter; pressure-bear tank and big water capacity.NOTE: Technical parameters may change as the products improved, please refer to the name place. Testing Condition: Ambient temp.: 20°C, inlet water temp.: 20°C.