Tubular Air Curtain 
 By optimizing the design of the impeller, with air volume, low noise, the impeller is a whole structure, the wind steady and uniform, can form a uniform air curtain 
 The air curtain is all-metal housing structure, high fire resistance, the overall structure is compact, easy to install, easy to clean and simple maintenance. 
 The air curtain with a glass fiber material with high strength plastic impeller, in addition to high-quality aluminum alloy impeller, the impeller strength, rigidity, corrosion resistance, lasting deformation, especially for large areas where the smoke concentration. 
 Air Curtain with future generations of this switch control, a high-low speed, suitable for different site requirements. 
 Computer optimized design of the motor, reliable, continuous operation of more than 5,000 consecutive hours.