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Wind degree series split inverter low-temperature air energy, using European air energy style design. Outdoor unit and indoor unit using copper pipe connection, water heat exchanger design in the indoor unit, outdoor unit without water piping. There is no need to add antifreeze in the water system, no fear of power outage, no freezing potential, and can effectively avoid the heat loss caused by the exposure of water piping in the outdoor low temperature environment, greatly improving the heating capacity.