... unit Used in clean room. FFU Air-blower filter unit can be connected and used ... has primary or high-performance filtering screen. The blower fan dares in air from the top FFU, and ... s±20%.Features:1 The blower fan is EMB direct driven high-performance centrifugal blower fan from Germany, which is ... , less vibration and non-step variable speed. The blower fan has reliable quality, and its service life is ...