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Your One Source For Rotary Heat and Mass Transfer Products 
Located in Baton Rouge, LA   225-753-1700

Passive Dehumidification



Rotor Source’s passive dehumidification rotors – commonly referred to as passive dehumidification wheels or Cromer wheels – and cassettes are made of high-capacity substrates (including silica gel desiccants). Our rotors and cassettes are available in a variety of structures to fulfill your air-drying and humidity-control requirements.

In addition, our recore program has gained notoriety as a faster, more cost-effective method of replacing any brand of passive dehumidification rotor product.


  • Four-week lead time
  • Standard sizes to 3.5-meter diameter – larger diameters available
  • Standard depths include 100 mm and 200 mm
  • Available in non-standard sizes
  • Complimentary performance software program
  • High capacity meets and exceeds the competition
  • Lower pressure drop than the competition
  • No-maintenance internal bearings
  • Welded structure maintains tolerance
  • Stainless-steel flange compatible with all seals
  • Low-cost for industrial and commercial applications


  • >200 KPA mechanical strength
  • Low pressure drop
  • Water washable
  • 98% inorganic content – our industry’s highest
  • 82% desiccant loading – the highest in the industry 
  • 16-lb. / CUFT optimum density
Passive Rotors


  • Welded coupling nut at spoke end
  • Welded media retention strip
  • Thick walled, DOM tubing-machined hub
  • Welded 10-gauge spokes


  • Welded seam with bolted attachment
  • Laser cut for maximum accuracy
  • Stainless steel construction
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