1.Adopt the this system  which open and close automatically when the fan works.

2.Centrifugal shutter system and other fitting of shutter made of Nylon,high quality engineering plastics,100% raw material,high strength,and long service life.

3.The inner steel fitting install in the flange,increasing the security,avoid the stretching change when Nylon system operates.

4.Adopt the injec tion moldd stainless steel blade,no broken,no distortion,aesthetic and durable.

5.Balance running machinery checked the  entire fan blade's;ensure operating steady,low noise,long service life.Also has no affect om the appearnce.it made of high quantiry aluminum-magnesium alloy,light weight,high strenth.

6.We could supply V-belt as the  type A or type B,upon the varieties demand of different customers.

7.The high efficient  and energy-saving motor passed the national CCC certification,Also protection class:IP 55,insulation class:F grade