Wall Mounted Exhaust Fan, Air Curtain, Centrifugal Fan manufacturer / supplier in China, offering Cross Flow Air Curtain Cool Air Curtain for Door Ventilation Creates Efficient Air Curtain, 36 Inch 180W 110V Powerful Air Door Commercial Indoor Air Fan 2 Speeds 1200cfm Commercial Indoor Heated Air Curtain, Customization 32 Inch 110V 220V High Efficiency and Insulation for Outdoor Hot and Cold Air Curtain and so on.