Edmonds Vertical Vane wind driven roof ventilator over 25 years natural ventilation technology has been built to endurance the tough conditions and operating environments.Edmonds ventilation products are designed, engineered and manufactured at ISO9001 accredited facility in Seven Hills, Australia. These ventilators works on wind energy, unique design allows wind turbine to act as a centrifugal impeller.Improved co-efficient of flow (Cf) compared to similar sized traditional spherical vents. Wind driven ventilators application includes, refrigerated warehouses, dry goods storage, meat and diary processing plants, livestock shed, storage warehouses, workshops, chemical storages, industrial plants, refineries, factories etc.