Fan Engineers have innovated World Class Air Curtains made with Hi-Tech Modern Technology under strict quality control combined with style and performance to give round the clock efficiency and in turn provide trouble free operations for years to come. Air Curtain is an environment, separation equipment which prevents outside air, insects and hot air entry to the conditioned area through the open door ways or the door being opened at frequent intervals. The principal of Air Curtain is that it blows the atmosphere air to constant velocity at the doorways and forms a Air stream for the entire width and height of the door openings. The velocity will vary depending on the effective throw of the air stream.