Runs only on natural wind energy No electricity or generator required Noiseless and cost effective Exhausts heat, humidity, smoke & dust Releases suffocation No maintenance cost No accidental hazards like fire due to short-circuits, electrical shocks Low cost of installation Assured ventilation for 24 hrs./365 days Protects food products and chemicals Remove foul smell and maintain hygienic condition 80% depreciation under section 32 of IT act