Tornado Turbine Industrial Roof Ventilation Systems reduce stress and increase productivity by: * Improving air quality, ensuring a cleaner and healthier working environment * Removing heat, fumes, steam and dust * Eliminating maintenance and operating costs * Giving you peace of mind that comes with a 5 year guarantee This cost-effective and efficient ventilation system is ideal to ventilate factories, workshops, warehouses, agricultural applications, schools, hostels, change houses, assembly halls and other building structures which require effective ventilation.