WOKS fans have a synchronous motor, ball bearings and a visable propeller with a protective grill. The ball bearings ensure a quiet long operational time of the fan. They enable the installations to be mounted both horizontally and verically. They are used to ventilate manufacturing rooms, plants, warehouses, sport centres. The volumetric efficiency range for the fans is from 890 to 5700 m3/h. All WOKS fans are manufactured with powder coated metal propellers.