Devi Enterprises provides high performance Natural Flap Ventilator for most kinds of industrial and commercial buildings. Our Natural Flap Ventilator is available in a wide range of sizes, louvre options and control options. It is best suited to industrial buildings and can provide both day to day and smoke ventilation, as well as permit the entry of natural daylight if fitted with polycarbonate flaps. The ventilator can be installed at any angle from the horizontal to 45°. Its wide range of base types and the fact that it is lightweight means that it can be installed into nearly any type of roof structure.