Free tool
Dehumidifier Sizer
Enter the area and how wet it feels and see the dehumidifier capacity class to look at.
A planning guide with common capacity classes. The true size depends on the soil, the seal of the space and the dehumidifier maker's rating, and we confirm on the visit.
How to use it
Three quick steps
- 1Enter the areaSquare feet of the crawl space.
- 2Say how it feelsA little damp, wet in spots or very wet.
- 3Read the classSee the capacity to look at and the drain.
Questions
About the dehumidifier sizer
Is this the exact size?
It is a planning guide with common capacity classes. The soil, the seal of the space and the maker's rating decide the real size.
Why does a cold crawl space need more?
Cool air gives up less water per hour, so units are rated higher than a warm room would need.
Does it need a drain?
Yes. Gravity or a small pump keeps you from emptying a bucket.
Next step
Services that go with this tool
Crawl Space Dehumidifier InstallationA dehumidifier made for crawl spaces, sized to the space and set to drain on its own.See the service 
Dehumidifier Repair and ReplacementA unit that has stopped drying, freezes up or leaks gets diagnosed and either fixed or swapped.See the service 
Humidity Monitoring SystemsA small sensor that watches the crawl space and tells you when humidity drifts, before it becomes a problem.See the service Find out what is under your house.
Call or text, or send the form for your free estimate. Tell us what you notice, from smells and cold floors to water and sagging.