Equipment reviews
Water Damage Drying Equipment — Dehumidifiers, Air Movers & Fans
Air movers and dehumidifiers are often shopped for separately, which is why so many drying jobs stall. This cluster covers both halves, plus the sizing rules that decide whether the equipment finishes the job or runs for a fortnight.
Quick answer
Drying water damage needs two machines working together, not one. Air movers push high-velocity air across wet surfaces to drive evaporation, and a dehumidifier removes the moisture they release into the air — run one without the other and you either stall or simply move the water around. Budget roughly one air mover per 250–300 sq ft of wet area, and size the dehumidifier by AHAM pints against the room, checking its low-temperature rating if the space is a basement or crawl space.
Buying guides in Drying Equipment
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Best Commercial Dehumidifiers (2026) — High-Capacity Units for Water Damage Drying
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Read the guideFrequently Asked Questions
Do I need both a dehumidifier and air movers?
YesAnd they are not interchangeable. Air movers accelerate evaporation by pushing high-velocity air across wet surfaces, which pulls moisture out of carpet, subfloor and drywall into the room air.
A dehumidifier then removes that moisture from the air. Run air movers alone and you raise the humidity until evaporation stops; run a dehumidifier alone and moisture leaves the materials far too slowly. IICRC S500 drying is built on both operating together.
What size dehumidifier do I need for water damage?
Size by AHAM pints per day against the affected area, not by the saturation figure manufacturers prefer to advertise — the two can differ by more than double.
As a working guide, 30–40 pints suits up to 1,500 sq ft that is only damp, 50 pints a moderately wet space of that size, and 70 or more for larger or persistently wet areas. If the space runs cool, the low-temperature rating matters more than capacity, because a standard unit loses output below about 65°F.
Is an LGR dehumidifier worth it for a homeowner?
For an active water damage job, yes. LGR — low grain refrigerant — units keep removing moisture at the low humidity levels that occur late in drying, which is exactly when a standard dehumidifier gives up.
That is the difference between reaching dry standard and stopping at 'feels dry'. For ongoing basement humidity control rather than an active loss, a good purpose-built basement unit is the more sensible purchase.
Can I use box fans instead of air movers?
For comfort, yes. For drying structure, no. A box fan moves a large volume of air slowly around a room; an air mover delivers a focused high-velocity stream along the floor and wall surface, which is where evaporation actually happens.
The airflow pattern matters more than the raw volume, and it is why restoration crews use air movers rather than the cheaper fans.
Who do I call right now for water damage?
Call (888) 840-6512. The line is answered 24 hours a day, seven days a week, and connects you with an IICRC-certified water damage restoration company that serves your area. Describe what you can see — where the water is coming from, how long it has been there, and whether it smells — the more specific you are, the faster the right company is on the line.
If the source is a pipe or an appliance, shut the main water valve first. Have four things ready and the call goes quickly: the address, when the water started, what is wet now, and whether you have filed an insurance claim.
Still not sure which of these is your situation? (888) 840-6512 · toll-free · answered 24/7