With this arrangement the motor sits outside the casing. The drive bearing and belts are contained within a tunnel , which isolates them from the airstream. The impellor is mounted onto a precision machined shaft . The front bearing sits behind the hub of impellor, protecting it from direct airflow. The maxium air temperature for this arrangement is 110ºC
Ancillaries such as spigot flanges, inlet bellmouths, casing feet and flexible connections are also available. RHF can offer non standard arrangements/special fans.