Rotating fan blades driven by a motor driven air flow

Rotating fan blades driven by a motor driven air flow, so that a class of air of indoor and outdoor air exchange regulation appliances, also known as theexhaust ventilation fan. The purpose of ventilation is to remove polluted indoor air, adjust the temperature, humidity and sensory effects.Ventilator widely used in home and public places. Ventilator often used in the home, belonging to the family of essential goods, such as air ventilation fans, bath ventilation fans