CYCLONE Turbine Automatic Ventilator is a type of Exhaust fan or Roof fan, where the function of the tool is to suck hot air, dust and also functions as a ventilation / air circulation tool. CYCLONE Turbine Automatic Ventilator does not use electricity, is maintenance-free, and can work for 24 hours, so it is far more efficient compared to Exhaust fans & Roof fans.