Weather Proof Turbine Roof Ventilators work on thermal current, centrifugal force to exhaust and the turbo design creates suction. These Turbine Roof Ventilators run on wind power and are offered in weather and storm proof construction. These Turbine Roof Ventilators are made using quality grade temperature resistant alloy steel material and can be fitted to any type of roofing. Weather Proof Turbine Roof Ventilators are maintenance free units that can be configured to meet required fresh air changes.