... .6.Metal case and stainless steel case are available,R22,R407C,R410a,R417A,R134A are for optional. Commercial type heat pump ... ) nested in aluminium finFan TypeLow-noise Wide-blade Axial FanRefrigerantTypeR22&R407C&R410aOperating ControllTypeFull-automatic, intelligenceControll panelLED display, back lightMain FunctionDisplayWater tank ...