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
Size the space
Use our dehumidifier calculator to confirm the right capacity for your area and water-damage class.
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.
Duct the wet air out
Attach the reactivation/wet-air hose and route it outside the drying chamber so moisture leaves the space.
Seal the space
Close windows and doors to contain the dried air — dehumidification works best in a controlled environment.
Run continuously & monitor
Run the unit continuously and check progress with a moisture meter. Combine with air movers for faster structural drying.
Adjust as it dries
As materials dry, you can reposition air movers and the dehumidifier to target remaining damp areas.
Rent this equipment
Allied Rental delivers, sets up and supports across the San Francisco Bay Area — and our team walks you through safe operation.