In this guide
Quick answer
For most basements, a 50-pint (2019 DOE rating) ENERGY STAR dehumidifier with a continuous drain hose or a built-in pump is the sweet spot. Very wet basements over about 1,500 sq ft, or finished basements where noise matters, are better served by a whole-basement unit (such as Santa Fe or AlorAir) that can drain continuously and run in cool temperatures. Set it to 45–50% humidity.
How we chose
We compared models by capacity under the current DOE test standard, ENERGY STAR status, drainage options (gravity hose or pump), low-temperature operation, warranty and long-term owner feedback. We haven’t lab-tested these units. We may earn a commission from links; it doesn’t affect our picks. See our affiliate disclosure.
The best dehumidifier for basement use isn’t always the biggest one — it’s the one sized for your space that drains continuously and copes with cool temperatures.
First: understand pint ratings (the 2019 change)
In 2019 the US Department of Energy changed how dehumidifiers are tested — from 80°F to a more realistic 65°F. Because cooler air holds less moisture, the same machine now gets a lower pint rating. A unit once sold as “70-pint” is often labeled “50-pint” today. When comparing older reviews, check which standard the rating uses.
How to choose the right size
| Basement condition | ~500–1,000 sq ft | ~1,000–1,500 sq ft | 1,500+ sq ft |
|---|---|---|---|
| Moderately damp (musty in humid weather) | 35-pint | 50-pint | 50-pint or whole-basement |
| Very damp (always smells, condensation) | 50-pint | 50-pint with pump | Whole-basement unit |
| Wet (seepage, water stains) | 50-pint + fix water entry | Whole-basement unit | Whole-basement unit |
If water is actively coming through walls or floors, fix that first — a dehumidifier can’t keep up with a leak. See How to Get Rid of a Musty Smell in the Basement.
Features that matter in a basement
- Continuous drainage. A hose to a floor drain, or a built-in pump to lift water to a sink or out a window. Emptying buckets daily gets old fast.
- Low-temperature operation. Basements are cool. Look for auto-defrost and a rated operating range down to the 40s–50s °F.
- Accurate humidistat and auto-restart after power cuts.
- ENERGY STAR certification — dehumidifiers run for many hours, so efficiency saves money.
- Washable filter and easy access to clean the coils.
- Warranty — whole-basement units often come with longer warranties.
Our picks
Best for most basements
50-pint ENERGY STAR dehumidifier with built-in pump
Models from established brands such as Frigidaire, hOmeLabs, LG and Midea in this class handle most damp basements up to roughly 1,500 sq ft. Choosing a version with a built-in pump lets you drain to a sink or out a window when there’s no floor drain.
Pros
- Good balance of price and capacity
- Widely available, easy to replace
Cons
- Louder than whole-basement units
- Less effective in very cool basements
Best compact modern design
Midea Cube (50-pint)
A modular design where the bucket stacks under the unit, so it holds much more water before emptying, with a drain hose option and app control.
Pros
- Large water capacity, small footprint
- Quiet for its class
Cons
- Higher price than basic 50-pint models
Best for large or very damp basements
Santa Fe Compact70 or AlorAir Sentinel HD55
Whole-basement and crawl-space dehumidifiers designed to run continuously in cool, damp spaces, with ducting options and continuous drainage.
Pros
- Built for cool basements and crawl spaces
- Can be ducted, quieter in living areas, longer warranties
Cons
- Much higher upfront cost
- Usually needs a drain or condensate pump
Setup tips
- Place the unit away from walls (at least 6–12 inches) with clear airflow.
- Close basement windows and doors to the outside.
- Set to 45–50% and confirm with a separate hygrometer — built-in sensors can be off by several percent.
- Clean the filter monthly during heavy use.
- Raise the unit off a damp floor if possible.
Frequently asked questions
What size dehumidifier do I need for my basement?
Should a basement dehumidifier run all the time?
How much does it cost to run a dehumidifier?
Sources
- ENERGY STAR — Dehumidifiers
- US EPA — A Brief Guide to Mold, Moisture and Your Home
Health note: This article is for general information and isn’t medical advice. If you or someone in your home has symptoms such as wheezing, a persistent cough, a rash that spreads, or a fever after a bite, talk to a doctor or other qualified health professional. Read our disclaimer.
