heat pump, heat pump water heater, water heater, safe, environmental protecting, energy saving Heat pump water heater is the newly-developed technology, which the heater absorbs the heat in the air and with some ... is only used to drive the compressor to pump up the heat from the air.2) Flexible: it can ... 's easy to install in many places,such as the garage,balcony,kitchen etc.5) All-weather use:it's ...