Mold needs moisture to grow. The EPA puts it plainly: there is no practical way to eliminate all mold spores indoors, so the way to control indoor mold is to control moisture. That is where a dehumidifier comes in. Hold indoor humidity below 60%, ideally 30 to 50% as the EPA recommends, and mold struggles to take hold on walls, wood and fabric.
The same applies whether you are searching for a dehumidifier for mould (the British spelling) or mold: the best dehumidifier for mould prevention is one sized to keep the room under 50% all the time. What a dehumidifier will not do is remove mold that is already growing. Clean that up first (see below), fix the leak or moisture source, then use the dehumidifier to stop the mold coming back.
Best dehumidifiers for mold compared
| Pick | Capacity | Coverage | Pump | Noise | ENERGY STAR | Price tier | |
|---|---|---|---|---|---|---|---|
| Best overall Midea Cube 50 (pump) | 50 pints/day (DOE) | Up to 4,500 sq ft (maker claim) | Yes | Maker: as low as 42 dB(A). RTINGS measured 54.3 dBA (low fan) to 56.2 dBA (high fan) | Yes | $$$ | Check price |
| Best for basement mold Honeywell TPFIT50PWK (pump) | 50 pints/day (DOE) | Up to 4,000 sq ft (retailer listing) | Yes | Not published | Yes | $$$ | Check price |
| Best for crawl space mold AlorAir HDi65S | 55 pints/day (AHAM 80F) | Up to 1,300 sq ft (maker claim) | Yes | Max 52 dB (Sylvane listing) | Not stated | $$$$$ | Check price |
| Best 3-speed pump Hisense 50 Lift-Up (pump) | 50 pints/day (DOE) | Not stated | Yes | Not published | Yes | $$$ | Check price |
| Best mid-size Midea Cube 35 | 35 pints/day (DOE) | Up to 3,500 sq ft (maker claim) | No | Not published | Yes | $$$ | Check price |
| Best for bathroom mold Midea Cube 20 | 20 pints/day (DOE) | Up to 1,500 sq ft (maker claim); Sylvane suggests about 300 sq ft | No | Not published by Midea for this SKU | Yes | $$$ | Check price |
| Best budget Hisense 25 | 25 pints/day (DOE) | 700 to 1,500 sq ft (sources differ) | No | Not published | Not stated | $$ | Check price |
| Best for closets Eva-Dry E-333 | See notes | Spaces up to 333 cubic feet | No | Silent (no fan or compressor) | No | $ | Check price |
Can a dehumidifier stop mold?
Yes, it can stop new mold growth and slow existing growth by drying the air and surfaces, but only if three things are true: the unit is big enough to reach your target humidity, it runs whenever humidity rises (set the humidistat, do not just run it for an hour), and the water source is fixed. A dehumidifier cannot keep up with a leaking pipe or water seeping through a foundation.
| Relative humidity | Rating | What it means |
|---|---|---|
| Below 30% | Too dry for most homes | Dry skin and static; wood can shrink. Turn the dehumidifier off or raise the setpoint. |
| 30 to 50% | Target range | EPA's recommended range for homes. Mold and dust mites struggle to grow. |
| 50 to 60% | Watch zone | Dust mites do better above 50%. Fine for short periods, not as an average. |
| Above 60% | Too humid | EPA says keep indoor humidity below 60% to limit mold growth. Run a dehumidifier. |
| 70% and up | High risk | Musty smells, condensation and mold growth on cool surfaces become likely. |
Sources: EPA Mold Course, Chapter 2 ("below 60 percent, ideally between 30 percent and 50 percent"); ENERGY STAR ("The optimum RH level for a building is generally considered to be between 30% and 50%").
Best dehumidifier for mold overall
Midea Cube 50 Pint Smart Dehumidifier with Pump
Mold prevention is about keeping humidity low all the time, not just some of the time. The Midea Cube 50 is good at that because it rarely stops for a full bucket: it has a pump and an oversized expanding bucket. It is a 50 pint unit, ENERGY STAR certified, and its app shows the room humidity so you can confirm it stays under 50%.
Heads up: Midea sells several SKUs (MAD50PS1QWT, gray MAD50PS1QGR, MAD50S1QWT without pump). Check the exact model number.
| Model number | MAD50PS1QWT |
|---|---|
| Type | Compressor (portable) |
| Capacity (current DOE test, 65F) | 50 pints/day |
| Coverage | Up to 4,500 sq ft (maker claim) |
| Built-in pump | Yes |
| Wi-Fi / app | Yes |
| ENERGY STAR | Yes |
| Noise | Maker: as low as 42 dB(A). RTINGS measured 54.3 dBA (low fan) to 56.2 dBA (high fan) |
| Bucket / capacity | Expandable bucket; listed as 3x more water capacity than a standard bucket |
| Humidity setting range | 35% to 85% |
| Rated power input | 480 W (Canadian MAD50PS1QGRC spec sheet) |
| Drain options | Bucket, gravity hose, or built-in pump that lifts water to a sink or window |
| Pump lift | Up to 16.4 ft vertical per Midea's spec sheet (a Midea support answer on Home Depot says 14 ft) |
| ENERGY STAR test data | 49.67 pints/day, IEF 2.01 L/kWh, about 515 kWh/yr (record for MAD50PS1QWT-A) |
| Price tier | Mid (about $200 to $400) |
Pros
- Runs continuously with pump
- App shows humidity
- 50 pints/day
Cons
- Noise (54 to 56 dBA measured)
Spec sources (checked 2026-11-11): Midea US product page (MAD50PS1QGR, 4,500 sq ft, pump); Midea Canada spec sheet MAD50PS1QGRC; Home Depot listing (42 dB(A), ENERGY STAR, 3X water capacity); RTINGS review MAD50PS1QWT (measured noise, efficiency); ENERGY STAR certified product record (MAD50PS1QWT-A).
Best dehumidifier for mold in basement
Honeywell TP-Fit 50 Pint ENERGY STAR Dehumidifier with Pump
Basement mold usually starts on the bottom of drywall, on stored cardboard and on wood near the rim joist. A 50 pint pump unit set to 45 to 50% is the right tool. The Honeywell TPFIT50PWK is certified at 49.66 pints a day and its pump reaches about 15 feet, so it can run all season without a bucket.
| Model number | TPFIT50PWK |
|---|---|
| Type | Compressor (portable) |
| Capacity (current DOE test, 65F) | 50 pints/day |
| Coverage | Up to 4,000 sq ft (retailer listing) |
| Built-in pump | Yes |
| Wi-Fi / app | Not stated |
| ENERGY STAR | Yes |
| Noise | Not published |
| Pump reach | Drains vertically or horizontally up to 15 ft (Sylvane) |
| Size / weight | 24.1 x 15.35 x 10.55 in, 40.48 lb (Staples) |
| Fan speeds | 2 |
| ENERGY STAR test data | 49.66 pints/day, IEF 2.01 L/kWh, about 516 kWh/yr (record for TPFIT50PWK) |
| Price tier | Mid (about $200 to $400) |
Pros
- Pump
- 50 pints/day
- ENERGY STAR
Cons
- 2 fan speeds
Spec sources (checked 2026-11-11): Honeywell Air Comfort TPFIT50PWK; Staples listing TPFIT50PWK; Sylvane: Honeywell TP-Fit series (pump reach); ENERGY STAR certified product record (TPFIT50PWK).
Best for crawl space mold
AlorAir Sentinel HDi65S Crawl Space Dehumidifier with Pump
Mold on floor joists and subfloor is a crawl space problem, and crawl spaces are cool. The AlorAir HDi65S is rated to run down to 33.8F, has a pump and Wi-Fi monitoring, and is rated at 55 pints (AHAM).
| Model number | HDi65S |
|---|---|
| Type | Compressor (crawl space / basement, low temp) |
| Capacity (AHAM test, 80F, 60% RH) | 55 pints/day |
| Coverage | Up to 1,300 sq ft (maker claim) |
| Built-in pump | Yes |
| Wi-Fi / app | Yes |
| ENERGY STAR | Not stated |
| Noise | Max 52 dB (Sylvane listing) |
| Low-temperature operation | 33.8F to 104F operating range (maker) |
| Capacity at saturation (90F, 90% RH) | 120 pints/day |
| Airflow | 130 CFM |
| Size / weight | 19.2 x 12.2 x 13.3 in, 44 lb |
| Warranty | 6-year limited (Amazon listing) |
| Price tier | Pro (about $900 and up) |
Pros
- Low-temp rating
- Wi-Fi alerts
- Pump
Cons
- Pro price tier
Spec sources (checked 2026-11-11): AlorAir product page HDi65S; AlorAir HDi65S spec sheet; Sylvane listing (noise, low temp).
Best 3-speed pump model for damp rooms
Hisense 50 Pint Lift-Up Dehumidifier with Built-In Pump
Three fan speeds and three operating modes make the Hisense ADH50KP26 flexible for a damp family room or laundry room. It is ENERGY STAR certified at 49.95 pints a day with a built-in pump.
| Model number | ADH50KP26 |
|---|---|
| Type | Compressor (portable) |
| Capacity (current DOE test, 65F) | 50 pints/day |
| Coverage | Not stated by maker |
| Built-in pump | Yes |
| Wi-Fi / app | No |
| ENERGY STAR | Yes |
| Noise | Not published |
| Low-temperature operation | Down to 38F (Amazon listing) |
| Fan speeds | 3 (High, Low, Auto) |
| Modes | Auto, Continuous, Manual |
| Drain | Quick-connect pump hose to a sink or window |
| Pump lift | Up to 16 ft with a 16 ft hose (Sylvane spec sheet for the Hisense 50 pint Lift-Up) |
| ENERGY STAR test data | 49.95 pints/day, IEF 2.01 L/kWh, about 526 kWh/yr (record for ADH50KP26) |
| Price tier | Mid (about $200 to $400) |
Pros
- Pump
- 3 speeds
Cons
- No Wi-Fi
Spec sources (checked 2026-11-11): Amazon listing B0GWFVLJF3 (Model Number ADH50KP26); Sylvane spec sheet: Hisense 50 Pint Lift-Up; ENERGY STAR certified product record (ADH50KP26).
Best mid-size dehumidifier for mold
Midea Cube 35 Pint Dehumidifier
For a medium room with mildew on window frames or a musty closet nearby, the Midea Cube 35 (MAD35S1QWT) is a certified 35 pint unit with Wi-Fi. Run a hose if there is a drain nearby.
| Model number | MAD35S1QWT (white) / MAD35S1QGR (gray) |
|---|---|
| Type | Compressor (portable) |
| Capacity (current DOE test, 65F) | 35 pints/day |
| Coverage | Up to 3,500 sq ft (maker claim) |
| Built-in pump | No |
| Wi-Fi / app | Yes |
| ENERGY STAR | Yes |
| Noise | Not published |
| Weight | 39.62 lb (retailer listing) |
| Warranty | 1 year (retailer listing) |
| ENERGY STAR test data | 35.82 pints/day, IEF 2.01 L/kWh, about 378 kWh/yr (record for MAD35S1QWT-A) |
| Price tier | Mid (about $200 to $400) |
Pros
- 35 pints/day
- Wi-Fi
Cons
- No pump on this SKU
Spec sources (checked 2026-11-11): Midea US product page MAD35S1QWT; Electronic Express listing MAD35S1QWT; ENERGY STAR certified product record (MAD35S1QWT-A).
Best dehumidifier for mold in bathroom
Midea Cube 20 Pint Smart Dehumidifier
Bathrooms get short bursts of very high humidity. Run the exhaust fan during and after showers, and use a compact unit like the Midea Cube 20 just outside the shower area to bring the room back down. Keep any plug-in unit away from water and use a GFCI-protected outlet.
| Model number | MAD20S1QWT |
|---|---|
| Type | Compressor (portable) |
| Capacity (current DOE test, 65F) | 20 pints/day |
| Coverage | Up to 1,500 sq ft (maker claim); Sylvane suggests about 300 sq ft |
| Built-in pump | No |
| Wi-Fi / app | Yes |
| ENERGY STAR | Yes |
| Noise | Not published by Midea for this SKU |
| Bucket / capacity | 3.2 gal (12 L) expandable bucket, per the user manual |
| Warranty | 1-year limited (Sylvane listing) |
| ENERGY STAR test data | 20.16 pints/day, IEF 1.70 L/kWh, about 249 kWh/yr (record for MAD20S1QWT) |
| Price tier | Mid (about $200 to $400) |
Pros
- Compact
- 20 pints/day
Cons
- Electrical safety limits where it can go
- Not a substitute for an exhaust fan
Spec sources (checked 2026-11-11): Midea US product page MAD20S1QWT; Sylvane listing (suggested room size, warranty); User manual (capacity, tank); ENERGY STAR certified product record (MAD20S1QWT).
Best budget pick
Hisense 25 Pint (30 Pint pre-2019) Dehumidifier
A basic 25 pint compressor unit is still far more effective than moisture absorbers for a small damp room. The Hisense DH3020K1W is the budget choice.
| Model number | DH3020K1W |
|---|---|
| Type | Compressor (portable) |
| Capacity (current DOE test, 65F) | 25 pints/day |
| Coverage | 700 to 1,500 sq ft (sources differ) |
| Built-in pump | No |
| Wi-Fi / app | No |
| ENERGY STAR | Not stated |
| Noise | Not published |
| Bucket / capacity | 1 gal bucket |
| Old (pre-2019) rating | 30 pints/day |
| Fan speeds | 1 |
| Price tier | Value (about $100 to $200) |
Pros
- Low price tier
- 25 pints/day
Cons
- 1 gallon bucket
- 1 fan speed
Spec sources (checked 2026-11-11): Hisense USA product page; Hisense Canada product page.
Best for closets and cabinets
Eva-Dry E-333 Renewable Mini Dehumidifier
For mildew in a closet or under-sink cabinet, a silent renewable desiccant like the Eva-Dry E-333 (up to 333 cubic feet) is enough. Recharge it by plugging it in when the indicator changes.
| Model number | E-333 |
|---|---|
| Type | Renewable desiccant (cordless) |
| Coverage | Spaces up to 333 cubic feet |
| Built-in pump | No |
| Wi-Fi / app | No |
| ENERGY STAR | No |
| Noise | Silent (no fan or compressor) |
| Bucket / capacity | Absorbs about 4 to 6 oz before it needs renewing (retailer listing) |
| How you renew it | Plug it into a wall outlet to dry the silica gel out; maker FAQ caps renewal at 18 hours of plug-in time |
| Size | 6.25 x 1.25 x 4.75 in |
| Price tier | Budget (under about $100) |
Pros
- Silent
- Reusable
Cons
- Tiny capacity
Spec sources (checked 2026-11-11): Hydrobuilder listing E-333; Eva-Dry FAQ.
Dehumidifier for wet walls
A dehumidifier for wet walls helps dry the surface and the room air, but find out why the wall is wet first:
| What you see | Likely cause | What to do |
|---|---|---|
| Water beads on a cold exterior wall in winter | Condensation | Lower humidity to 30 to 40% in winter, improve air movement |
| Damp patch that grows after rain | Leak or seepage | Fix gutters, grading or the leak; a dehumidifier alone will not keep up |
| Damp at the bottom of basement walls | Ground moisture | Run a 50 pint unit, check drainage outside |
| Wet wall near a bathroom or kitchen | Plumbing leak or poor venting | Check pipes; vent fans to the outside |
What humidity kills mold?
No humidity level kills mold. Dry conditions make mold go dormant and stop spreading, but spores survive and regrow when moisture returns. That is why the EPA's advice is to keep humidity below 60%, ideally 30 to 50%, and to clean up existing mold. The EPA says you can usually clean up mold yourself if the area is less than about 10 square feet; for larger areas, follow its guidance on hiring a professional.
Buying-guide decision table
| Where the mold is | Buy |
|---|---|
| Basement | 50 pint with pump |
| Crawl space | Crawl space unit |
| Bathroom | Compact unit + exhaust fan |
| Closet or cabinet | Renewable desiccant |
| Whole house musty | Whole house dehumidifier |
Frequently asked questions
Will a dehumidifier get rid of mold?
What humidity stops mold growth?
Should I run a dehumidifier after mold removal?
Sources
- EPA Mold Course, Chapter 2: indoor humidity guidance
- EPA: A Brief Guide to Mold, Moisture and Your Home
- ENERGY STAR: Dehumidifiers buying guidance and sizing chart