Gosvan Exhaust Fan Centrifugal System
1.Material: High quality Nylon PA66
2.Guide Rod: 304 stainless steel with special material outside, high strength, no rust, reduce friction.
3.Rivet: 304 stainless steel , wear-resisting, no rust.
Advantage:
It can keep the shutters open at complete 90 degree to ensure the lowest air resistantce and biggest air volume.Special device is
made together with it to make sure the shutters close silently when the fan stop working.