Save Cost, need only natural wind Safe as it does not require electricity. No pollution as it uses natural air Easy to install on any type of roof light weight, made from aluminum Virtually maintenance free No noise as using supervane bush Rain proof as AirExit is designed to protect from rain AirExit's main applications are industries like Textile Mills, Foundries, Chemical Factories, Engineering Industries, Steel Factories, Sugar Mills, Food & Sea Food Processing Industries, Distilleries & Breweries, Godowns, Auditoriums, Warehouses, Hospitals and for Domestic purposes.