This arrangement has a shaft and bearings supporting an overhung impellor. The bearings and shaft are outside of the airstream. The hub of impellor protrudes from the casing. The fan unit is mounted onto a channel frame, along with motor and slide rail unit & belt drive. The drive guard and support are neatly integrated with the fan unit and channel base. The channel base comes in 2 variants, one with outriggers and one without. Outriggers enable easy drilling of foundation holes without having to mark and then move the fan.
Maximum air temperature is 250ºC . The casing is split horizontally (discharge angles allowing) to aid impellor removal. The impellor can be also be removed from inlet side, but not from the drive side.