We are providing Air Curtains to our consumer with the following features:* All Metallic Casing â High in fire resistance, compact in overall construction, convenient in installing, easy for cleaning and maintenance.* Piano Type Button to control the high / low speed that can meet the need of various environments & door heights.* Reliable designed motor that can run 5000 hours continuously.* Multiple Installation specifications â Body dimensions of 4/5 feet* Variable Installation Heights â 7 to 9 Feet* Centrifugal Type Forward â bending blade Wheel construction, fitted with efficient Volute design, rendering the capacity of the curtain for the best result. This type of wheel is high efficient, less noisy, with large air volume (maximum air speed reaching 20m/s), High velocity of this air curtain is unmatched by other air curtain in the market.