The best dehumidifier for a basement

Who this is for

This is for the basement that is not flooded, just damp: the musty smell when you come down the stairs, condensation on the cold-water lines in July, a hygrometer reading above 60 percent, efflorescence on the block, cardboard boxes going soft on the slab. It is also for anyone whose old dehumidifier died and who is confused about why the new ones say 50 pints where the old one said 70.

We are a water damage restoration crew. We run commercial dehumidifiers in basements for a living, and we see what the homeowner's portable was doing when we arrive: usually running on a full bucket, shut off on the float switch, in the wrong corner. The picks below are the portable units we would put in our own basements, chosen on the manufacturers' published specifications and the ENERGY STAR certified list, and on what makes a portable actually keep running unattended for a season: how it drains, how big the bucket is, how cold it can run, and how loud it is.

A note on our spec tables: we only publish numbers we can cite to the manufacturer's documentation or the ENERGY STAR database. Every pick on this page has at least 90 percent of its rubric verified. Two common units, the hOmeLabs 50-pint and GE's APER50LZ pump model, are not picks because we still cannot read their manufacturers' spec sheets; they are covered under what we skipped.

If you have standing water, this is the wrong page. Read how to dry out a flooded basement in 72 hours, and if it is more than an inch deep or it is sewage, call a pro.

The short answer

• Buy a 50-pint (DOE 2019) unit for any basement over about 800 sq ft, or any basement that is more than musty. The 50-pint class is what used to be sold as 70 pints before the 2019 test change; it is the right size for most basements, and it costs little more than a 35.
• Run it on a hose, not the bucket. Every unit here has a continuous-drain port. Put the unit near a floor drain, a sump or a utility sink and forget the bucket; our continuous-drain guide covers the hose and the pump.
• If the drain is uphill, buy a pump unit. Frigidaire's FHDP5033Y1 or Midea's pump Cube (MAD50PS1QWT) push water up to a sink or out a window well on their own.
• Efficiency is a wash in this class. Every 50-pint here is ENERGY STAR certified at the same 2.01 L/kWh integrated energy factor, about 515 to 520 kWh a year on the federal test. Choose on drainage, bucket and noise, not on the energy label.
• If the basement is below 50°F in winter, no portable will work well. Compressor portables stall around 41°F, and lose capacity well above that. Either accept it will not run in January (which is usually fine; cold basements are dry basements) or look at a crawl space class unit rated for the cold.
• Size it with the calculator, with 25 percent headroom, and ignore the square footage on the box.

How to choose a basement dehumidifier

Capacity: DOE 2019 pints, and why 50 is the number

Since mid-2019 every portable dehumidifier sold in the US is rated under the Department of Energy test procedure (10 CFR 430, Appendix X1) at 65°F and 60 percent relative humidity, instead of the older AHAM rating at 80°F/60%. Cooler air gives up less water, so the numbers dropped by about 30 percent: the old 70-pint is today's 50, the old 50 is today's 35, the old 30 is today's 20 to 22. The machines did not change. If you are replacing a pre-2019 unit, buy about 0.7 times its pint number. The ENERGY STAR database shows the real test results behind the round numbers: 49.67 pints for the Midea Cube 50, 49.95 for the Frigidaires, 20.16 for the Cube 20.

For a basement, the 50-pint class is the default. It handles about 1,200 to 1,500 sq ft of real, damp basement (not the 4,500 sq ft on the box, which assumes a sealed room at the test temperature), cycles instead of running flat out, and costs only a little more than a 35. Step down to 20 to 35 pints for a small basement that is merely musty, a finished room over a crawl space, or a laundry room. Step up to a commercial unit rated in AHAM pints, or two portables, for anything over about 1,500 sq ft, anything with seepage, or anything cold. The calculator walks through it with 25 percent headroom built in.

Drainage: hose versus bucket versus pump

This is the decision that determines whether the dehumidifier works in August when you are on vacation. A 50-pint unit at full tilt fills the Frigidaires' 1.9-gallon bucket about three times a day and the Cube's 4.25-gallon bucket once or twice. Nobody keeps that up, and every unit stops when its bucket is full.

• Continuous drain (gravity). Every unit here has a port for a garden hose or a 5/8-in. drain hose. If there is a floor drain, a sump pit or a utility sink lower than the port within hose reach, this is the answer: set the unit on a stand or shelf, run the hose with continuous fall and no bellies, and the bucket never fills. Midea includes the hose with both Cubes; Frigidaire's pages list the continuous-drain option but not a hose, so budget a few dollars for one. The step-by-step is in our continuous-drain guide.
• Built-in pump. If the only drain is higher than the unit (a utility sink, a window well, a laundry standpipe), buy a unit with a pump: the Frigidaire FHDP5033Y1, or Midea's MAD50PS1QWT pump Cube, which Midea's manual rates to 14 ft of lift (Frigidaire does not publish a lift figure). Keep the pump line short, avoid loops, and run the pump once a month in the off-season; a pump is one more thing to fail.
• Bucket. For a bedroom or a space with no drain at all. If you must, the Midea Cube's extended bucket (about 4.25 gallons per the manual's fill table on the 50-pint, 12 liters or about 3.2 gallons on the 20-pint) cuts trips to one a day. Carry it with two hands; cracked buckets are the most common portable failure we see.

ENERGY STAR and the integrated energy factor

A basement dehumidifier runs for months. Efficiency is reported as the integrated energy factor (IEF) in liters of water removed per kilowatt-hour, and ENERGY STAR certification sets a floor for it by size class; the Most Efficient designation marks the top tier each year. In the 50-pint class the floor is where the market sits: the Midea Cube 50 (current MAD50S1QWT-A revision), the Midea pump Cube and both Frigidaires are all listed at 2.01 L/kWh and 515 to 520 kWh a year on the federal test. The Cube 20 is listed at 1.7 L/kWh, which is normal for small units and the reason a 20-pint running flat out all summer is not cheaper than a 50-pint cycling half the time. None of the five is on the Most Efficient list; if the energy label matters more to you than the bucket, that is where to look.

One more thing the database tells you: the ENERGY STAR specification changed on October 1, 2025 (Version 6.0), and units certified under the old specification dropped off the list unless they were re-tested. The current listings for every pick here are dated August to October 2025 and use R-32 refrigerant. Older stock of the same model numbers with R-410A was certified under the earlier version.

Utility rebates often attach to ENERGY STAR dehumidifiers, and some utilities run recycling bounties for old units; check yours before you buy.

Noise

A portable dehumidifier is a compressor and a fan in a plastic box. Manufacturers publish sound in dBA at the fan settings when they publish it at all. Frigidaire publishes 49 dBA on low fan and 51.5 on high for both the FHDD5033Y1 and FHDP5033Y1; Midea publishes 48 for the Cube 20 and nothing for the 50-pint Cubes, so that cell is empty rather than guessed. In an unfinished basement a few decibels rarely matter. Under a bedroom or in a finished family room they do, so run the unit on low fan once the space is at setpoint, and set it on a rubber mat rather than directly on the slab, which turns the floor into a sounding board.

Cold basements and the 41°F floor

Every pick here is rated to operate down to 41°F (Midea's manual gives 41°F to 95°F; Frigidaire says 'down to 41°F'). Well above that, from about 65°F down, capacity falls and the coil starts to frost; auto-defrost cycles keep the unit alive but it removes little water. In practice this is fine for a seasonal basement problem: a basement at 50°F in January is holding very little moisture, and the dehumidifier can sit idle. It is not fine for a basement that stays at 55°F and damp year-round, or for a walkout basement that is really a crawl space with headroom. For those, a unit rated for cold air (AlorAir's Sentinel line is rated to 33.8°F, Santa Fe and AprilAire to 49 to 50°F) from our crawl space roundup is the right tool, and it comes with a 5- or 6-year warranty instead of 1.

Placement

Air has to reach the coil. Put the unit as central as the drain allows, at least 12 in. from any wall on the intake side, away from the furnace (its draft confuses the humidistat) and out of closets and under-stair nooks; the plan view above shows the spot and the corner to avoid. Doors between rooms should stay open, or each room gets its own unit. Keep it off the slab on a mat or a short stand, both for noise and for the day the sump backs up. And put a hygrometer at the far end of the basement; the unit's own sensor reads the air it is standing in.

Humidistat setting

50 percent relative humidity is the setpoint. The EPA's general guidance is to keep indoor humidity below 60 percent and ideally between 30 and 50; below about 45 percent in a basement you are spending electricity for no benefit. Set 50, confirm the far-corner hygrometer agrees within 5 points after a week, and leave it.

Warranty and lifespan

Portable dehumidifiers are a 3- to 7-year appliance, and the warranty tells you what the maker expects: every pick here carries 1 year (Midea's manual says one year full; Frigidaire lists one year of labor coverage). If a unit stops collecting water in year two with the fan running, it has usually lost refrigerant charge, and it is a replacement, not a repair. Clean the filter monthly in season and vacuum the coil each spring; a clogged filter is the leading cause of a frosted coil and a unit that 'quit working'. If you want a 5- or 6-year warranty, you are shopping the crawl space class.

What we skipped and why

hOmeLabs HME020031N. The best-selling 50-pint of the last decade, and the one we see most often on water losses. hOmeLabs' website has blocked our attempts to read its product page and manual in two separate rounds, and we do not copy numbers from retailer listings, so its table is empty and it cannot be a pick. The current ENERGY STAR list carries two newer hOmeLabs models (24 and 32 pints, with Wi-Fi) and not this one. If you own one, run it on a hose; if you are buying, the Frigidaire FHDD5033Y1 is the same kind of box with a spec sheet we can cite.

GE APER50LZ. GE's ENERGY STAR pump unit, with a production run GE's own support page dates from March 2020 to July 2026. GE's product pages render their specs in a way our tools cannot read, and GE's replacement family (ADSE50X) is already on the ENERGY STAR list, so we are waiting for the successor's sheet rather than publishing a thin entry as a pick.

Frigidaire FFAD5033W1 and FFAP5033W1. Frigidaire marks them discontinued; the FHDD5033Y1 and FHDP5033Y1 above are the replacements and are the ones with published tables.

'80-pint' and '120-pint' portables. Some portables are marketed on the pre-2019 AHAM number or a saturation figure far above their DOE rating. We compare on DOE pints only; a unit that will not state its DOE rating does not make the list.

Desiccant and thermoelectric units. Thermoelectric (Peltier) 'dehumidifiers' remove a pint or less a day and are toys for a basement. Desiccant units work in cold rooms but cost two to three times the electricity per pint; useful in an unheated cabin, not in a basement with a furnace.

Whole-home and crawl space units. They are the right answer for a large, cold or divided basement and for anything under a house, but they are a different class with different ratings, so they have their own roundup.

Anything we could only document from retailer listings. We publish manufacturer specifications or we leave the cell empty, and we mark the page accordingly.