... hotel .office block,movie theater .so on Explosion proof Axial Flow Fan Type BT35-11Application1,Designed forExplosive atmosphere ... IIA,IIB,Temperature classes T1~T43,Designed for sites with explosive atmosphere, such as petroleum exploitation, refinery, storage, chemistry ... usage.5,Low noise, Low consumption, and secure the explosive proof performance.6,With flexible installation: Bracket type, Pipe ...