Acme Engineering and Manufacturing Corporation

- Model 2100 - Airfoil Roof Top Centrifugal Fan



Model 2100 is a belt drive, tubular centrifugal exhauster with the motor, drives and bearings located outside the airstream. The 2100 is designed to operate in arrangement 9H (horizontal) and 9V (vertical) and available in both Class 1 and Class 2. The tubular design is furnished with mounting flanges on both ends for easy installation.


  • Heavy gauge, rolled steel construction and continuously welded to eliminate air leakage
  • Standard charcoal baked enamel with UV inhibitors
  • Multiple aerodynamic conversion vanes, provides rigid support for outer casing
  • Pre-punched flange at each end for ease of mounting
  • Inlet and outlet diameters shall be identical to accommodate a single duct size
  • Flush bolted access door for servicing
  • 8 heavy duty, steel mounting brackets with 4 interchangeable mounting feet
  • Allow for rotation of the motor position to 90718072707360°
  • Dichromate plated, steel fasteners


  • Centrifugal, backwardly inclined type with die-formed airfoil blades for maximum efficiency and quiet operation
  • Precision balanced for smooth trouble free operation
  • The dynamically balanced impellers for our products are balanced to the grade G6.3 as described in the standards:
  • ANSI/AMCA 204 'Balance Quality and Vibration Levels for Fans'
  • ISO 14694 Tans - Specifications for balance quality and vibration levels'
  • Charcoal baked enamel UV inhibitors


  • Double-sealed unitary pillow block bearings
  • Rated at Lso life of 200,000 hours
  • 2 year limited warranty
  • With external lube lines fittings


  • Corrosion-resistant coated, steel shaft
  • Sized so that first critical shaft speed is at least 25% over the max operating speed


  • Continuous duty motors with sealed ball bearings
  • Motors are located outside the airstream
  • Adjustable motor base maintains positive belt tension

Drive Assembly

  • Cast iron variable pitch drives sized for 150% of fan horsepower
  • Static free, oil, and heat-resistant belts

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