The diameter of stainless steel blades extends to 1270mm from 1250mm,Increase the air volume while Dimension keeps same;

Extended blades increase air volume by 10%,Innovated small shutters & New type sealing rotational device can improve the efficiency by 30%.

Shutters are improved into 11pcs in small size from old 8pcs big type,which facilitate the shutters’ opening & closing.

Adopt double layer new type sealing device,which is more firm & makes the better sealing compared with old single layer.

Special wear-proof casing design in our innovated sealing device change the rotational arm friction way to avoid the friction with the fans’ frame,which effectively solve the unsmooth opening,bad sealing of shutters when stop the fans