Firstly we would like to introduce our selves M/s Global Air Solutions based at Kolhapur Maharashtra. We are the Manufacturer of Wind Turbine Air Ventilators and Polycarbonat ,FRP, and GP Sheet. In normal condition one turbo ventilator can cover 225/350 sq.ft. of area depend your shed heat temperature and you will get appropriate 12 to 13 air change / hour and this will be continues process too. By using this Turbine Air Ventilator you can save the energy by 5 to 7 kw/sq of area.