This product consumes electric energy a little. In detail, it absorbs heat in surrounding air, transmits the heat to condenser through compressor and release the heat to water tank to heat it, which has the energy efficiency three times higher than electric heater and can meet various demands on hot water of big water volume, high pressure and constant temperature for a whole family for 24 h. It can release cold air as an air conditioner and can dehumidify to certain extent in partial space as balcony, storage room and garage. With the exclusive 3D heating technique of Haier that heats locally with heating rod.