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Equipment Guide

How to Use a Desiccant Dehumidifier

Desiccant dehumidifiers pull moisture from the air using a moisture-absorbing wheel, and work well in cooler conditions and for deep drying. They're a core tool for restoration, construction and specialty drying.

This is a general guide — always follow the specific unit's manual and contact us with any questions.

⚠ Safety essentials

  • Place on a stable, level surface with clearance around intakes and exhausts.
  • Route the wet-air exhaust hose to the outside or to an area being vented, not back into the drying space.
  • Keep power cords clear of water; use a GFCI-protected circuit.

Step by step

1

Size the space

Use our dehumidifier calculator to confirm the right capacity for your area and water-damage class.

2

Position the unit

Set it centrally in the space, with the process-air intake in the wettest area and the dry-air outlet aimed across the materials you're drying.

3

Duct the wet air out

Attach the reactivation/wet-air hose and route it outside the drying chamber so moisture leaves the space.

4

Seal the space

Close windows and doors to contain the dried air — dehumidification works best in a controlled environment.

5

Run continuously & monitor

Run the unit continuously and check progress with a moisture meter. Combine with air movers for faster structural drying.

6

Adjust as it dries

As materials dry, you can reposition air movers and the dehumidifier to target remaining damp areas.

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Allied Rental delivers, sets up and supports across the San Francisco Bay Area — and our team walks you through safe operation.