... .Compressor:Copeland/panasonic Air source heat pump, Swimming pool heat pump with CE,ROHS approval,Heat pump water heater,Swimming pool heat pump,Commercial electric air source heating pump,heat pump for swimming pool ... thread copper and hydrophilic aluminium foil type heat exchanger3. Condenser: titanium material,anticorrosive,special for swimming pool water.4. Expansion valve: electronic expansion ...