Best Basement Dehumidifier (2026): Picks for Damp Basements and Crawl Spaces

A dehumidifier pulls more water out of warm, wet air than out of cool air. So one machine has several pint numbers, one for each test, and listings print the biggest.

• DOE test (U.S. Department of Energy, since 2019) 65°F, 60% humidityClose to a real basement. This is the number on the ENERGY STAR list. Buy on this one.
• Old AHAM test 80°F, 60% humidityThe pre-2019 number. ALORAIR and other crawl-space brands still print it ("35 pints at AHAM").
• "Saturation" or "max" 90 to 95°F, 90% humidityHot, soaking air. This is the big number in most titles: "70 pint", "150 pint".

ENERGY STAR on why the numbers dropped in 2019: “there's less water to remove in cooler air, which is why the capacities have decreased.”^[4]

Of the 11 listings here that print a pint number, 8 print one bigger than the government figure. The typical box number is 3.0 times the real one.^[2]

One machine, three numbers: Waykar's manual for its 70-pint crawl-space unit lists 24 pints a day at 65°F, 36 at 80°F and 70 at 95°F with 90% humidity.^[8]

ENERGY STAR sizes a dehumidifier by how damp the space is and how big it is, in DOE-test pints. No standard sets a square-foot number, so ignore the one on the box.^[5]

"Remember, it's better to oversize than undersize!" — ENERGY STAR. Pints are on the current DOE test.

• Slightly damp and under 2,000 sq ft: 20 to 30 pints. The Levoit 25-Pint with Pump (LDH-H251S) (24.54) fits.
• Very damp or wet, or a damp 1,000 sq ft basement you want dry fast: a 50-pint. The Midea 50 Pint with Pump (MAD50P1AWS-A) (49.74) fits. ENERGY STAR says it is better to oversize than undersize.
• Wet and over 2,000 sq ft: 50 pints or more. Run two 50-pint units, or a whole-house unit like the AprilAire E080 Pro (65 pints on the whole-home test).

Cover the dirt with a sealed plastic vapor barrier and close the vents before you buy anything. DOE's crawl-space guide warns that gaps or open seams in the barrier let ground moisture in. With open vents, a dehumidifier keeps pulling in humid outdoor air.^[7]

Most crawl-space units are sold as "70 pints". That number is at 90 to 95°F and 90% humidity. On the DOE test, all 2 of the 70-pint units here that are certified do 24 pints a day. By ENERGY STAR's table, that suits a slightly to moderately damp space under 2,000 sq ft, which is what a sealed crawl space should be.

Look for three things: a short body (11 to 13 inches) that fits under the joists, a built-in pump, because a crawl space rarely has a floor drain, and auto-defrost, because crawl spaces get cold.

For a big or wet crawl space with a drain, the biggest certified crawl-space units here are the Santa Fe Compact70 (43.75 pints on the DOE test, sold by a third-party seller on Amazon) and the ALORAIR Sentinel HD55S Wi-Fi (36.33 pints on the DOE test, sold by a third-party seller on Amazon). Neither has a pump.

To get it off a wet floor, hang it from the joists: the AprilAire E080 with Pump and Hanging Kit say so in the listing.

The lowest working temperature, from the listing or the maker's manual: basement units 41°F; crawl-space units 33°F to 49°F; the AprilAire whole-house unit 50°F. 6 of the 17 units here state none. Auto-defrost lets a unit keep going in cool air, but it removes less water while it defrosts.

Some crawl-space units have no DOE rating at all. The ALORAIR Sentinel HD35P with Pump and the ALORAIR Sentinel HD55 are sold as commercial units and print only the old AHAM number. Check the ENERGY STAR list before you buy one.

Cost per year = ENERGY STAR's yearly kWh × 16¢ per kWh, the rate we use on every dehumidifier page. Your own rate may be higher or lower.

ENERGY STAR's yearly kWh assumes the DOE test's run time. A wet basement in July runs longer and costs more; a dry one in winter costs less.

The L/kWh number is how many liters of water a unit removes for each kWh of power on the DOE test. Higher is better. ENERGY STAR's Most Efficient list is the top tier.

So a certified 50-pint unit costs about $84 a year, and a 25-pint about $45.

All 18 we checked, in stock today: DOE pints, box claim, ENERGY STAR, yearly cost, drain, lowest temperature and Amazon price

Dehumidifier	DOE pints/day	Box says	ENERGY STAR	Per year	Drain	Lowest °F	Price	Buy
Basement units (plug in, roll on wheels)
Waykar 150 Pint with Pump (YDZ-150PM)sold by AmazonWarranty: 1 year + 1 on request	50	150 at 95°F/90%	Yes · 2.02 L/kWh	$84	pump, 9.84 ft	—	$449.99	Buy
Midea 50 Pint (MAD50C1AWS-A)sold by AmazonWarranty: 1 year	49.74	50	Yes · 2.01 L/kWh	$84	hose to a drain	41°*	$219.99	Buy
Midea 50 Pint with Pump (MAD50P1AWS-A)sold by AmazonWarranty: 1 year	49.74	50	Yes · 2.01 L/kWh	$84	pump	41°*	$276.70	Buy
Frigidaire 50 Pint (FHDD5034Y1)sold by AmazonWarranty: 1 year	49.71	50	Yes · 2.01 L/kWh	$83	hose to a drain	—	$304.88	Buy
Kesnos 25-Pint (JD025N-80)sold by AmazonWarranty: 1 year + 2 optional	24.93	80 at 95°F/90%	Yes · 1.7 L/kWh	$48	hose to a drain	—	$179.99	Buy
Waykar 25-Pint (JD025CE-80)sold by AmazonWarranty: 1 year + 1 on registration	24.93	80 at 95°F/90%	Yes · 1.7 L/kWh	$48	hose to a drain	—	$208.96	Buy
Levoit 25-Pint with Pump (LDH-H251S)sold by AmazonWarranty: 3-year compressor	24.54	84 at 104°F/95%	Most Efficient · 1.88 L/kWh	$45	pump, 9.8 ft	41°*	$229.99	Buy
Waykar 24-Pint (YDZ-80)sold by AmazonWarranty: 1 year + 1 on registration	24	80 at 95°F/90%	Yes · 1.76 L/kWh	$45	hose to a drain	41°	$271.99	Buy
Crawl-space units (short, metal or hard shell)
Santa Fe Compact70third-party sellerWarranty: 6 years	43.75	—	No	—	hose to a drain	49°	$1,689.99	Buy
ALORAIR Sentinel HD55S Wi-Fithird-party sellerWarranty: 6-year limited (2 years full)	36.33	120 at saturation	Yes · 2.08 L/kWh	$61	hose to a drain	—	$585.74	Buy
ALORAIR Helios D35third-party sellerWarranty: 6-year limited (2 years full)	24	70 at saturation	Most Efficient · 1.95 L/kWh	$44	hose to a drain	37.4°*	$343.73	Buy
Waykar 70 Pint Crawl Space with Pump (AFW1.5DPM)sold by AmazonWarranty: 2 years + 5-year compressor	24	70 at 95°F/90%	Yes · 1.79 L/kWh	$46	pump, 16.4 ft	41°*	$359.97	See ALORAIR on Amazon
ALORAIR Sentinel HD35P with Pumpthird-party sellerWarranty: 6-year limited (2 years full)	none (35 at 80°F)	70 at saturation	No	—	pump, 19.6 ft	33°*	$396.19	Buy
ALORAIR Sentinel HD55third-party sellerWarranty: 6-year limited (2 years full)	none (53 at 80°F)	113 at saturation	No	—	hose to a drain	—	$499.36	Buy
Whole-house units (ducted, often installed by a pro)
AprilAire E080 Prosold by AmazonWarranty: 5 years	65	80	Most Efficient · 2.35 L/kWh	$101	hose to a drain	50°*	$1,779.18	Buy
AprilAire E080 with Pump and Hanging Kitsold by AmazonWarranty: 5-year full replacement + 1-year parts	65	80	Most Efficient · 2.35 L/kWh	$101	pump	50°*	$1,913.99	Buy
Flood drying units (no DOE rating)
ALORAIR Storm LGR Extremethird-party sellerWarranty: 6-year limited	none (85 at 80°F)	180 at 90°F/90%	No	—	pump, 14.7 ft	33.8°*	$639.27	Buy
Add-on condensate pump
Little Giant VCMA-20ULS condensate pumpsold by AmazonWarranty: 1 year	—	—	—	—	lifts 20 ft	—	$77.45	Buy

DOE pints come from the ENERGY STAR list or DOE's certification database; "none" means the unit is not in either. The box number and its test condition are the listing's own words. Lift, lowest temperature and warranty are the listing's words; * marks a figure from the maker's own manual. A dash means neither says. Cost per year = ENERGY STAR yearly kWh × 16¢. Prices read live November 11, 2026.

What size dehumidifier do I need for a basement?

Size on the DOE-test pints, not the box. ENERGY STAR says a space under 2,000 sq ft needs 20 to 30 pints if slightly damp, 25 to 40 if very damp, and 30 to 50 if wet. For most basements, including a damp 1,000 sq ft one, a certified 50-pint like the Midea 50 Pint with Pump (MAD50P1AWS-A) is the safe buy. ENERGY STAR says it is better to oversize than undersize.

What is the best dehumidifier for a crawl space?

For most sealed crawl spaces, the Waykar 70 Pint Crawl Space with Pump (AFW1.5DPM): 13.15 inches tall, a pump that lifts water 16.4 ft, and on the ENERGY STAR list at 24 pints a day on the DOE test. Seal the crawl space first: close the vents and lay a vapor barrier.

Does a basement dehumidifier need a pump?

Only if the drain is higher than the unit or far away. A hose drains by gravity to a floor drain below the unit. To reach a sink, a window or a sump, you need a pump. Pumps here lift water 9.8 to 19.6 ft. If your unit has no pump, an add-on condensate pump does the same job.

Why do crawl space dehumidifiers list two different pint ratings?

They are two different tests. "Saturation" is at 90 to 95°F and 90% humidity; "AHAM" is the old test at 80°F and 60%. Since 2019 the government test is 65°F and 60%, which gives a smaller number again. A "70 pint" crawl-space unit is about 24 pints on that test.

Will a dehumidifier work in a cold basement or crawl space?

Down to a point. Units with auto-defrost keep running in cool air but remove less water while they defrost. The lowest working temperature, from the listing or the maker's manual: basement units 41°F; crawl-space units 33°F to 49°F; the AprilAire whole-house unit 50°F. 6 of the 17 units here state none. Below the stated floor, heating the space a little works better than a bigger dehumidifier.

How much does it cost to run a basement dehumidifier?

At 16¢ per kWh, the rate we use on every dehumidifier page, a certified 50-pint costs about $84 a year and a 25-pint about $45, from ENERGY STAR's yearly kWh. A wet basement in summer costs more.

Should I seal my crawl space before adding a dehumidifier?

Yes. Lay a sealed vapor barrier over the dirt and close the vents first. DOE's crawl-space guide warns that gaps or open seams in the barrier let ground moisture in, and that a sealed crawl space may need a dehumidifier to hold 30 to 50% humidity.

Can I use a regular portable dehumidifier in a crawl space?

Only if it fits and drains. Most basement units are about 2 feet tall and have a bucket. A crawl space needs a short unit with a pump, since you cannot empty a bucket there.

Where should I put it?

In the open middle of the space, not in a corner or against the wet wall, so air reaches it from every side. Makers ask for open space around the air intake and outlet. Set it near the drain or the pump's hose run, and in a crawl space, on the vapor barrier on a level pad or hung from the joists.

What humidity should I set it to?

Set it to 50%. EPA says to keep indoor humidity below 60%, ideally between 30% and 50%. Check with a separate hygrometer across the room.

Do I need a whole-house dehumidifier in Florida?

Only if the house stays humid with the air conditioner running. Your AC removes water too. If rooms still feel damp, a whole-house unit on the ducts handles every room. The AprilAire E080 Pro is rated 65 pints a day on DOE's whole-home test.

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1. 1

   U.S. DOE: 10 CFR Part 430, Subpart B, Appendix X1, test method for dehumidifiers

   Table 1: portable units are tested at 65°F (dry bulb) and 60% relative humidity; whole-home units at 73°F and 60%.

2. 2

   ENERGY STAR certified dehumidifiers (data.energystar.gov, dataset mgiu-hu4z)

   567 models pulled October 20, 2026: DOE-test pints, L/kWh, yearly kWh, Most Efficient flag.

3. 3

   U.S. DOE Compliance Certification Database: dehumidifiers

   1,212 records pulled October 20, 2026. Used for units certified to DOE but not on the ENERGY STAR list.

4. 4

   ENERGY STAR: Dehumidifier Testing and Capacity

   "there's less water to remove in cooler air, which is why the capacities have decreased"

5. 5

   ENERGY STAR: Dehumidifiers (sizing table)

   Pints per day by dampness and area. "Remember, it's better to oversize than undersize!"

6. 6

   U.S. EPA: A Brief Guide to Mold, Moisture, and Your Home

   Keep indoor humidity below 60%, ideally 30 to 50%.

7. 7

   U.S. DOE Building America: Guide to Closing and Conditioning Ventilated Crawlspaces (2013)

   "Poor sealing practices of the polyethylene vapor barrier allow ground moisture to infiltrate through gaps or open seams in the barrier, increasing the relative humidity of the crawlspace." "it might be necessary to install a permanent dehumidification system in the crawlspace to maintain the 30%-50% humidity levels within the space."

8. 8

   Makers' manuals and spec sheets: Midea, Waykar, Levoit, ALORAIR, AprilAire, Little Giant

   Used where a listing does not state a figure: the lowest working temperature (marked * in the table), Waykar's capacity at three test conditions, and AprilAire's 65 pints at 73°F. Each quote and link is in our decode file.

9. 9

   Amazon listings: box pints and the condition, pump, drain, height, warranty, as each listing states them

   18 listings; price and seller read live November 11, 2026. Each figure is the listing's own words; the fragment is kept in our decode file.