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Inviata - 03/11/2020 : 01:33:17 The water source heat pump unit enjoys efficiency better than the air cooling heat pump unit, can reduce power consumption. When only partial residents stay in the building, their own heat pump unit and circulating water system can be turned on without the running of heating or cooling system realizing energy saving. While for the central air conditioning system, turning it on for one or two residents use is a great waste of energy.http://www.headpowerac.com