Wind Powered Exhaust Fans
These are non electric exhaust fans working 24 x 7 , non stop with zero power consumption and warranty of 10 years. It is easy to be fixed without the need for any kind of structural changes. It is widely used in Hotel Kitchens, Medical or Chemical labs, Hospitals where silence and noiseless operation is required. These are also used when a short circuit can cause a catastrophe among public.