Rotor Source is a supplier of industrial-grade desiccant dehumidifiers and energy recovery wheels (rotors and cassettes) for commercial HVAC systems. Certified by AHRI and a member of ASHRAE, we have been serving customers nationwide since 1999. We offer free estimates and employ certified technicians. 

We specialize in: 

• Desiccant dehumidification rotors & cassettes 
• Passive (Cromer) dehumidification wheels 
• Ostberg energy recovery wheels & cassettes 
• Rotor recore services (media replacement) 
• OEM replacement parts, technical manuals & selection software 

Desiccant dehumidification rotors utilize high-capacity substrates, such as silica gel or molecular sieves, housed in laser-cut aluminum to effectively remove moisture at low vapor pressures. This technology is ideal for preventing industrial corrosion and condensation. We offer rotors in sizes up to 3.5 meters in diameter and depths ranging from 100 to 400 mm, along with customizable options.

A passive dehumidification rotor, also known as a Cromer wheel, utilizes desiccant media in a rotating wheel to absorb and transfer moisture without the need for external heat. This makes it ideal for humidity control in clean rooms, archives, and storage facilities. The standard sizes range up to 3.5 meters in diameter and have depths of 100 to 200 millimeters.

Ostberg energy recovery wheels are designed to transfer both sensible and latent heat between exhaust and supply air streams, significantly enhancing HVAC system efficiency. These high-performance rotors are available in a standard 3.5-meter diameter with depth options ranging from 100 to 200 mm. They can be equipped with either single-phase or three-phase motors, and feature adjustable purge sections to minimize cross-contamination and maximize performance.

Send us your existing rotor frame, and we’ll replace the desiccant media with our proprietary blend, restoring like-new performance at a fraction of the cost of a new unit. Our typical turnaround times are fast—just give us a call at 877-ROTORS-1 to arrange shipping of your frame.

You can: 

• Call us at 877-ROTORS-1
• Fill out the “Contact” form with your OEM name, serial numbers, and project details 
• Email us directly via the link in the footer  

Visit our Downloads page to get: 

• Energy Recovery Technical Manual & Software 
• Desiccant & Passive Dehumidification Manual & Software 
• Acrobat Reader link  

We are certified by the Air Conditioning, Heating, and Refrigeration Institute (AHRI) and proud members of ASHRAE, ensuring that our designs consistently meet the highest industry standards for performance, safety, and reliability.

Yes, Rotor Source proudly serves customers nationwide, providing fast turnaround times and rapid delivery on all rotors, recores, and replacement parts.

We pride ourselves on fast turnaround times for new rotors, recores, and parts—contact us to get an estimated lead time for your specific project.

For rotor components and media, please contact your OEM first. If they can’t help, fill out our Parts inquiry form with your OEM and Rotor Source serial numbers, and we’ll get back to you promptly.