The industry’s most complete exhaust line!


Maintain grain quality ecomically and reduce the risk of storage losses by using Caldwell aeration systems.  Aeration systems are essential in maintaining uniform grain temperatures and moisture levels.  Caldwell aeration exhaust products include:

Gooseneck Bin Vent

2670 CFM (4536m3/h) Caldwell hooded bin vent is 20% larger than standard hooded vents.

Pre-punched roof panels make installation quick and easy!

Mushroom Vent

3750 CFM (6371m3/h) Caldwell mushroom bin vent is 42.8% larger than standard hooded vents. A rain and snow diverter provides optimum moisture control.

All vents install easily and are designed to minimize build up of ice and foreign materials.


Caldwell offers a wide variety of grain conditioning ducts for commercial and farm use, including a variety of specialized designs. Caldwell provides custom aeration designs and installation layouts to fit your precise application, providing optimum air distribution.

  • Straight Run Flush Floor
  • Spiral Corrugated Duct
  • Smooth Wall Round Duct in a Straight Run
  • Annular Corrugated Duct
  • Flush Floor "Y" System
  • Smooth Wall Round Duct in a "Y" System


Caldwell roof exhausters are used to provide ventilation as well as exhaust in large commercial bins.  Caldwell roof exhausters incorporate a low static pressure, high volume axial fan design and the following features:

  • 18” (45.72cm) Roof Exhaust Fan 4,000 CFM (6796m3/h)
  • 24” (60.96cm) Roof Exhaust Fans with Adaptors 10650 CFM (18094m3/h)
  • Galvanized housing
  • Can be ordered with either totally enclosed Air Over motors or Explosion Proof Motors 

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Tel: (701) 252-6118

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8052 36th St. SE 

Jamestown, ND