Independent guides · No sponsored picks
Dehumidifier guides that start with the numbers
Sizing charts in current 2019 DOE pints, running costs you can work out for your own unit, and troubleshooting that starts with the most likely cause rather than the most dramatic one. Forty guides, written from manufacturer specifications, DOE test standards and building-science sources.
Start here
The three questions almost everyone arrives with.
What size do I need?
Enter floor area, how damp the space is and ceiling height, and get a capacity in current DOE pints — the rating most online charts still get wrong.
What will it cost to run?
A mid-size unit draws 300–700 watts and costs roughly $20 a month at typical rates. Price your own unit, and see which settings cut the bill.
Mine isn’t working
Match the symptom to its cause, ordered from most to least likely. Most units that “stopped working” are doing exactly what they should.
Browse by topic
Eight clusters, forty guides.
Sizing & Buying
What capacity you need, which type suits your space, and what the pint ratings actually mean.
Humidity Basics
What the numbers on your hygrometer mean, and what to aim for.
Mold & Condensation
Where damp actually starts, how fast it spreads, and how to stop it.
Basements
Drying out a damp basement: sizing, drainage, placement and musty smells.
Crawl Spaces
Vents, vapor barriers, encapsulation, and the units built for the space.
Troubleshooting
A unit that ices up, leaks, smells or refuses to start — in order of likelihood.
Running & Settings
What it costs, where to put it, and what to expect once it is switched on.
Commercial & Industrial
LGR, desiccant and heavy-duty units for restoration and job sites.
Charts worth bookmarking
Drawn from DOE test standards and building-science sources, not copied from retailer listings.
How these guides are put together
Every figure on this site is traced back to a manufacturer specification, a DOE test standard or a published building-science source. Where a page contains an affiliate link, it is disclosed — and the recommendation does not change because of it.