... intake centrifugal fans,capacity:20000 m3/h.Motor:5.5KW,belt drive, intake and extract are same.Lighting:4x36Wx8units ... double-intake centrifugal fan,capacity:22000m3/h.Motor:5.5KW,belt drive.(Inner motor centrifugal fan optional)Lighting:4x36Wx8Units.Damper:Automatical ... intake centrifugal fan,capacity:22000 m3/h.Motor:5.5KW,belt drive.( Inner motor centrifugal fan optional)Air handling plant dimension ...