Centrifugal fans

Impeller Type


Backward Inclined Utility Blower,
UL Listed for Emergency Smoke Control Systems


The BIUBSH is a backward curved packaged utility blower that is UL listed for emergency smoke control systems. This unit is designed to supply and exhaust air in hospitals, hotels, schools, fume hoods and similar environments. BIUBSH fans come standard with V-belt drives with a minimum of two belts, motor, UL weather cover, backplate fins, shaft seal, shaft cooler, high temperature grease, insulated drive stand and UL Emergency Smoke Control Systems labels and nameplate. Fans must be installed per local codes and NFPA 96.

Sizes (impeller diameters)

  • 12.25 to 60 inches (315 mm to 1,525 mm)


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

Link To Video Library

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