Design 37 Direct Drive Tube Axial Fan

Chicago's Direct Drive Design 37 fans with adjustable pitch blades are capable of more air delivery for the same horsepower. Efficiencies exceeding 70% are common. How? The primary reason for increased efficiency is Chicago's unique blade design. The entire length of the blade surface generates air flow, not just the tip alone. The air flow is uniform all along the blade.


To furnish the most efficient fan for a given application, one must first determine the ideal combination of quantity of blades and blade pitch for each of the common motor speeds. To provide this optimum efficiency, Chicago's PowerMate propellers are available with either 3, 4, 6, 9, or 12 blades set to any of 50 predetermined pitch settings. Of the more than 70,000 possible ratings these combinations provide, only the most efficient selections are matched to available motor speeds and horsepowers for publication in the certified performance tables.

Operating range

Maximum CFM 60,000
Maximum Static Pressure 2" wg
Maximum Temperature 150 degree Celcius
Fan Sizes 16" to 48"


  • Unique airfoil blade
  • Direct drive
  • Industrial quality
  • High pressures, volumes
  • Precision blade molding
  • Continuous duty motor
  • Many sizes, blade configurations, pitches
  • Run tested


  • Inlet bell
  • Mounting feet (Reinforced)
  • Mounting lugs (Vertical)
  • Extended lube leads
  • Disconnect switch
  • Wire guard screen
  • Mounting lugs (Horizontal)
  • Companion angle rings
  • External electrical box (Type SC)

Alternate Products

Greater CFM Design 34 Fixed Pitch Vane Axial
Similar Products Design 37 Direct Drive Panel Fan


Bulletin (3.72 MB)Manual (1.9 MB)