Centrifugal fans

Impeller Type


Backward Inclined Utility Blower


The BIUB is a backward inclined vent set designed to supply and exhaust air in hospitals, hotels, schools, fume hoods, etc. Weather covers are also available for protection of motor and drives for outdoor applications.

The BIUB is designed to meet AMCA requirements for Class I and Class II construction with both aluminum and steel impellers. Fan housings are coated with a powder coat as standard.

Sizes (impeller diameters)

  • 10.5 to 60 inches (270 mm to 1,525 mm)


  • Airflow to 78,660 CFM (133,600 m3/hour)
  • Static pressure to 8 inches w.g. (1,990 Pa)

Installation manual

Link To Video Library

  • How To Videos
    (Inertia Base Installation, Rotor Removal & Installation, Sheave Installation, Unitary Base Installation, Impeller Removal & Installation, Piezometer Ring Installation)