exhaust fan
An exhaust fan or ventilation fan is a part of the air circulation cycle that uses centrifugal force generated by the fan and its design to exhaust air. There are different types of exhaust fans, including centrifugal, axial, radial, roof-mounted, ceiling-mounted, and mushroom-shaped. The purpose of using an exhaust fan is to remove heat, grease, and excess pollutants from the environment.