... works. 4.Low noise and low pollution. Heat Pump Water Heater1.Applying for world famous compressor.2.Microcomputer LCD ... froste,higher efficiency.4.Contant temperature water output, automatic circulation heat preserving, water temperature keeps at certain level, convinent ... functions, low pollution operate.6.Evaporator applies clear water membrance, high absorbing ability, anti-corrosion.7.Convinent ...