Air Ventilator is the intentional movement of air from outside a building to the inside. Here hot or impure air from inside the house is thrown out and fresh air gets replaced. Air Ventilation used for providing acceptable indoor air quality. The vents or flues carry the impurities to be expelled from the building, in a way which does not cause harm to the occupants of the building. Proper Ventilation of air is essential for good health. The centrifugal force generated by the spinning vanes, creates a low-pressure region which helps in suction of the air. Air drawn out by the suction action is continuously replaced by the fresh air from outside. Easy to install, these ventilators have very low maintenance cost.