Protostar India has successfully introduced turbine ventilators which has zero running cost and gives year round ventilation.
Turbo Ventilators operate on WIND POWER. More over it is weather proof with stainless steel and aluminum construction. The Ventilators are maintenance free and do not have any operating cost during their lifetime.
The operation is simple. As the vent hood is rotated by the wind, the stale air is exhausted through the vanes by centrifugal force and a natural inward flow of fresh air takes place.

Easy installation: These ventilators are easily adaptable to all kinds of roofing and can be installed on slopes or ridges or flats. The product carries a no question asked 10 years warranty and has the added advantage of 80 % depreciation.