Using advanced front double door opening device, small wind resistance, good sealing, high efficiency, lengthened cone design improve exhaust power.

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

SANHE fan blades 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, surface finish BA grade.(Originally, we adopt the aluminum alloy blades,which had some problems caused by long time work ,for example,blades are broken,air volume decreased.)

Fan blades are adjusted by intelligent dynamic-balance tester, ensure the fan smooth running, lower vibration, less noise, increase stabilit

The first adopt Type B belt which 3 times longer service life instead of type A.

The sole manufacturer which adopt Hot-dip galvanized blade support and safe net ,to ensure never rust in the future use ,adopt high grade standard accessories ,not rust

Complete new CNC production line improved fan quality up to top grade, aesthetic appearance.