The best basement dehumidifiers with a pump

A dehumidifier manages the moisture already in the air. It does nothing about where that moisture is coming from — which is a feature, not a criticism, as long as you know it.

A dehumidifier is a moisture management tool, not a waterproofing product. It takes water out of the air. It has no effect on why that water is in the air. Used after the source is addressed it makes a basement genuinely pleasant; used instead of addressing the source it is an expensive way to run a machine all summer.

Do the sources first

1. Cover the sump pit. An open pit is a continuous evaporation surface. See pit covers.
2. Cover bare soil in a crawl space. Ground vapor migrates upward into the house. See vapor barriers.
3. Fix active leaks and seal porous walls. Damp masonry is a large moisture source all on its own.
4. Check the dryer vents outside. A disconnected dryer duct in a basement puts gallons of water into the air every week, and it is a frequent and overlooked cause.

Do those and the dehumidifier you need is smaller, cheaper and runs far less.

Quick picks

#	Product	Best for	Score	Price
1	AlorAir Sentinel HDi90A purpose-built basement and crawl-space unit with a real condensate pump and published performance at both rating standards.	A large or sealed basement	8.8★★★★	Check price on Amazon → #ad we earn a commission · Amazon shows the current price
2	50-pint basement dehumidifier with pumpA consumer portable with an internal pump — the pragmatic choice for most homes.	A normal basement on a normal budget	7.9★★★★	Check price on Amazon → #ad we earn a commission · Amazon shows the current price

Scores are ours and editorial, not lab measurements — see how we pick. Tap a row for the full write-up.

#1A large or sealed basement

AlorAir Sentinel HDi90

A purpose-built basement and crawl-space unit with a real condensate pump and published performance at both rating standards.

8.8/10★★★★★Our editorial score: 8.8 out of 10

Check price on Amazon →

#ad we earn a commission · Amazon shows the current price

Specifications, as published by AlorAir

Type	Basement and crawl-space dehumidifier with a built-in condensate pump
Capacity	90 pints/day at AHAM (80 F, 60% RH); 198 pints/day at saturation
DOE rating	47.71 pints/day at DOE (60 F, 60% RH)
Coverage	Up to about 2,600 sq ft
Airflow	210 CFM
Noise	Under 58 dB(A)
Pump lift	Pumps condensate over 16 ft of hose
Operating range	33.8 to 104 F
Filter	MERV-8

Two things justify the price. The first is the pump: in a basement with no floor drain, a unit that lifts condensate to a sink or a window is the difference between a working appliance and a bucket you empty twice a day.

The second is low-temperature operation. Consumer dehumidifiers frost up and shut down in a cold basement, which is exactly when you need them in spring and fall. A unit rated down toward freezing keeps working.

The dual AHAM and DOE figures are also worth noticing. DOE testing is done at a lower temperature and produces much smaller numbers, so a manufacturer publishing both is being straight with you about what you will actually get.

What it gets right

• Publishes both AHAM and DOE figures, so you can compare it honestly against other units
• Pumps condensate over 16 ft of hose, which is what a basement with no floor drain needs
• Operates down to around 34 F, where consumer units ice up and stop
• Covers roughly 2,600 sq ft with a MERV-8 filter

Where it falls short

• Costs considerably more than a consumer portable
• Under 58 dB is quiet for the class but audible in a finished space
• Physically large

Specifications from AlorAir Sentinel HDi90 specification listing, AlorAir Sentinel HDi90 retail listing.

#2A normal basement on a normal budget

50-pint basement dehumidifier with pump

A consumer portable with an internal pump — the pragmatic choice for most homes.

7.9/10★★★★★Our editorial score: 7.9 out of 10

Check price on Amazon →

#ad we earn a commission · Amazon shows the current price

Specifications, as published by Generic

Type	Portable dehumidifier with an internal condensate pump
Why the pump matters	It lifts the condensate to a laundry sink or a window, so you are not emptying a bucket

For a basement that is cool rather than cold and damp rather than wet, this is the sensible purchase. Buy the version with the pump: the bucket model gets emptied diligently for two weeks and then ignored.

What it gets right

• The pump is the feature that matters, and it is available at consumer prices
• Adequate capacity for a typical basement
• Easy to move and to replace

Where it falls short

• Frosts up and derates in a cold basement
• Shorter service life than a purpose-built unit
• Capacity claims vary wildly between rating standards

Specifications from Amazon listing (search).

Sizing and the ratings confusion

Dehumidifier capacity is quoted in pints per day, under one of two very different test conditions. AHAM testing uses 80 F and 60% relative humidity. DOE testing uses 65 F and 60%. The same machine will show a much larger number under AHAM.

Target 50 to 55% relative humidity. Below about 45% you are spending energy for no benefit; above 60% you are in mold territory. A cheap hygrometer tells you where you are and costs almost nothing.