The 500mm Tornado Roof Ventilator is a cost-effective and efficient way to ventilate factories, warehouses, schools, and other buildings. The ventilator is activated by natural convection inside the building and can be assisted by the wind outside. The design of the Tornado Ventilator enables activation by the wind, which creates a flow of air through the throat of the Tornado to enhance extraction. This roof ventilation system is ideal for buildings which require effective ventilation. The positive extraction of the Tornado Turbine ventilation system eliminates dust penetration and a down-draught into the building to ensure a cleaner and healthier working environment. Coverage 120m2