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Low-temperature air energy heat pump water heating unit adopts low-temperature jet enthalpy compressor, high-efficiency casing heat exchanger, R410A environmental protection refrigerant, patented defrosting technology, defrosting more quickly, high-efficiency heat exchanger and other world-famous brand parts configuration. Energy-saving advantage over traditional water heater equipment is significant, is the ideal choice to replace the traditional coal-fired, gas, oil, and other high energy consumption hot water equipment.