Non power turbo ventilator A non-power turbo ventilator, also known as a wind-driven ventilator or wind turbine ventilator, is a device used to ventilate and exhaust air from a building or enclosed space using wind energy. Unlike traditional ventilators or exhaust fans that require electricity to operate, non-power turbo ventilators rely solely on natural wind currents to create airflow. The design of a non-power turbo ventilator typically consists of a roof-mounted dome-shaped structure with fins or blades. These blades are strategically positioned to catch the wind and create a pressure difference, which in turn draws air out of the space below. The ventilation process occurs as the wind passes over the blades, causing them to rotate and create suction.