Product description:

?1.Front double door opening device, small wind resistance, good sealing and high efficiency

2. Lengthened cone design improve exhaust pressure.

3. Fan double doors closed with the rubber sealing?which effectively avoid air back-flow when start fans at different time. Greatly improve the operation efficiency by 15-20% compared with the same power fan.

4.?Blade is special designed for top grade efficiency?which made of Krupp stainless steel by punch forming. Large air volume, no deformation, no broken, no dust, attractive and durable Thickness 1.2mm.

5.?Frame, cone and butterfly door adopts high quality galvanized steel plate,high strength and no deformation.