The exhaust fan is specially used to aerate and cool the workshop.The workshpo ventilationlayer use this exhaust fan to ventilate the air. The ventilation layer is made of SMC,which makeits cooling speed eight times stronger than ordinary fan.The exhaust fan contains 85% activefiber on the surface,which can pull out harmful gas from workshop when it’s heated,Naturalventilation is both environmental friendly and corrosion protection.