1.commercial Air source heat pump water heater, 2. Use Special Compressor, 3. Safe, soft,environmental,energy ... KW22 143Rated Power KW4.5 9.0Heating exchange waycooling coolingHot Water Output L/H440 900Water Temperature The temperature is 55C,40 ... hours; 6.Customized design is available ,OEM &ODM are available. swimming pool heat pump water heaters