Our factory is a manufacturer of fire fans, providing a wide variety of fire fans. The fan series includes fire smoke exhaust fans, positive pressure supply fans, diagonal flow fans, mixed flow fans, axial flow fans, air conditioning fans, centrifugal fans, fiberglass fans, and various fan cases. Fire safety inspection certificates are complete, welcome to order. The non powered fan adopts CAD simulation optimization design, and the wind cap, wind duct, and impeller are all made of fiberglass material. Non powered fan products have the advantages of no electricity, no noise, small size, light weight, corrosion resistance, high exhaust efficiency, easy installation, and are widely used for exhaust and ventilation in commercial buildings and industrial enterprises (more suitable for light steel structure roofs)!