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Home Uncategorized Start-Up of CDI Desiccant Dehumidification

Start-Up of CDI Desiccant Dehumidification

December 7, 2025 by Bill Reagan

Air Handling Units

Climate by Design Logo

Several Climate by Desing, Int’l (CDI) desiccant dehumidification air handling units were recently started up and placed in service.  These units serve several areas in a semiconductor manufacturing plant where humidity control is very important to the process.  This west coast manufacturing plant is located in an area with higher than usual design temperatures and humidity ratios.


These CDI desiccant dehumidifiers utilize both chilled water pre-cooling and desiccant technology to achieve the necessary moisture removal.  The combination of face-and-bypass dampers across the desiccant rotor and SCR control of the reactivation heat for moisture rejection offer precision control and energy management.  Process balancing and airflow volume control are enhanced with a VFD and direct drive fan with Piezometer Ring and transmitter for direct readout of airflow in CFM.

Typical schematic
Typical 20,000 CFM unit

This Project Has a 4,500 CFM and a 20,000 CFM Unit

  • 4,500 CFM 100%OSA
  • Start-Up Under Way
  • A CDI Electrical Panel
  • 20,000 CFM Capable of Removing 2,400+Lbs/Hr of Water!
  • Start-Up Under Way
  • That’s Me

CDI Is Growing!

Since 1991, Climate by Design Int’l in Owatonna, MN has experienced exponential growth which has led them to their current 200,000+Ft2 flagship facility. The built environment and science based applications continue to expand with ever increasing needs for precision moisture and temperature control.  CDI has become a valued partner for these projects.  In 2025, CDI became a member of the Modine family (NYSE: MOD), a global leader in thermal management technology and solutions.


CDI Tools For You

Get your CDI Dry Tools App today!

CDI offers a variety of application tools and resources on its website.  Download your own Dry Tools App today.  Visit the Resources page for handy HVAC formulas, educational talks, webinars and literature.

KEEP IT DRY WITH CDI!

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About Q Applied Systems

More about Q Applied Systems Corp

Q Applied Systems Corp is a manufacturer’s representative of HVAC and moisture control equipment and systems as well as fume and dust collection products.  To learn more about these commercial and industrial products you can contact Q Applied Systems or visit our Products page for more information on equipment and manufacturers represented.

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Filed Under: The Blog, Uncategorized Tagged With: cdi, Climate By Design, desiccant, desiccant dehumidifier, dew point control, Humidifiers, Humidity, hvac, Pure Humidifier, q applied systems

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