Belt drive, tubeaxial exhauster with the motor, drives and bearings located outside the airstream. Capacities up to 63,845 CFM and up to 2 inch static pressure. The HA is designed to operate in any position and is furnished with mounting flanges on both ends for easy installation.



  • Constructed of heavy gauge rolled steel
  • Rolled flange at each end for ease of mounting
  • Standard charcoal baked enamel finish provides a tough durable surface
  • Gasketed access door for servicing on model sizes 42” - 60”
  • Streamlined belt and bearing enclosure eliminates turbulence and air drag

Aluminum Propeller

  • Heavy duty, all welded aluminum construction standard on all sizes (except 54” and all sizes of the smoke exhaust construction which use a high grade steel)
  • Circular-arc blades for high airflow capacity
  • Precision balanced for smooth vibration free operation


  • Permanently lubricated in an Acme D.S. pillow block housing
  • Bearings are resiliently mounted in neoprene rings
  • Rated at L50 life of 200,000 hours
  • 5 year limited warranty on Acme D.S. pillow block bearings
  • Pillow block bearings are standard on HA60 and smoke exhaust construction 

Drive Assembly 

  • Cast iron drives sized for 150% of drive horsepower
  • Static free, oil and heat resistant belts


  • Continuous duty motors located outside the airstream
  • Motors shipped mounted to the fan



  • Coatings
  • Pillow Block Bearings
  • Steel Propeller
  • Mounting Base
  • Companion Flange
  • Weather Cover/Belt Guard
  • Inlet Bell
  • Inlet/Outlet Guards
  • Belt Guard
  • SE Option U.L. Listed "Power Ventilator for Smoke Control Systems"

Additional Info

  • Max Static Pressure: 2.0" w.c.
  • Max Airflow (CFM): 63,845
  • Drive Type: Belt Drive
  • Blade Type: Axial
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