The best bathroom dehumidifiers tackle this problem head-on by pulling excess moisture right out of the air. But sizing a unit for a small, damp space can be tricky. You need something powerful enough to dry the room but compact enough to fit near the tub.
We researched top-rated models, analyzed customer feedback, and compared extraction rates to find the five best units for your bathroom.
- Ideal for humid bathrooms
- Energy-efficient
- Quiet at 48 decibels
- Easy to operate
- Auto-shutoff prevents leaks
- Automatic or manual drain
- Excellent control panel
- 6,000 square feet coverage
- Included humidity control
- Good for small bathrooms
- Auto-shutoff
- One-button operation
- Energy-efficient
- Removes and traps bacteria
- Continuous drain option
Why You Need a Bathroom Dehumidifier
Bathrooms are naturally the wettest room in the house. Between showers, baths, and sinks, humidity levels skyrocket quickly. If you live in a smaller home or apartment, you might even have laundry hanging to dry, which adds even more moisture to the air.
Mold and mildew thrive in these conditions. While a standard exhaust fan helps move air around, it often isn’t enough to lower humidity levels significantly. A dedicated dehumidifier actively removes water vapor, drying out the room and preventing bacterial growth.
Fan Vs. Dehumidifier
Finding the Right Size
Most bathrooms are small, so you usually don’t need a massive industrial unit. However, tank size matters. A tiny tank fills up fast in a steamy bathroom, requiring you to empty it constantly.
We found that a 30-pint dehumidifier is the sweet spot for most master baths. These units offer a balance of power and size, and many include continuous drainage options so you never have to empty a bucket.
What to Look For
Not all dehumidifiers can handle the tropical climate of a post-shower bathroom. Here is what you need to look for before buying.
Area Coverage
Manufacturers rate dehumidifiers by square footage. This tells you how large of a space the unit can effectively dry.
Start by measuring your bathroom. Since bathrooms connect to other spaces, it is smart to choose a unit that covers slightly more square footage than you strictly need. Most units on our list cover up to 1,000 square feet, which is plenty of power for a bathroom and helps dry the air faster.
Moisture Extraction
Performance is key. Bathrooms experience rapid spikes in humidity. You need a machine that can handle that load to prevent mold.
Compressor-based dehumidifiers (usually 20 pints and up) perform best in these environments. Small “peltier” or thermo-electric mini dehumidifiers are quiet, but they struggle to remove large amounts of steam quickly. If you have a serious moisture problem, skip the mini units and get a 30-pint model.
Tank Size vs. Extraction Rate
Do not confuse “pints per day” with tank size. A unit might be able to extract 30 pints of water in 24 hours, but the internal bucket might only hold 4 pints.
Small tanks are a hassle because they shut off when full. We recommend looking for a tank capacity of at least one gallon if you plan to rely on manual emptying. This ensures the unit runs effectively while you are at work or asleep.
Continuous Drainage
This is a game-changer for bathrooms. Continuous drainage allows you to bypass the water tank entirely.
You attach a hose (often a standard garden hose) to the back of the unit and run it directly into your shower drain, sink, or floor drain. This allows the machine to run 24/7 without you ever lifting a finger. Just remember that most standard units use gravity, so the dehumidifier must sit higher than the drain.
Product Reviews
We combed through specs, analyzed extraction rates, and read hundreds of user reviews to find the units that actually work in high-humidity environments. We looked for reliable drainage options, compact footprints, and solid moisture removal. These are the top five picks for a drier bathroom.
Tosot 30-Pint Dehumidifier
Best for High Moisture
The Tosot 30-pint is our top recommendation for wet rooms like bathrooms and laundry areas. It balances power with size, running quietly while effectively pulling moisture from the air. You can easily set your target humidity level, and the machine does the rest.
Versatility is a major plus here. You can use the slide-out bucket with its convenient handle, or you can hook up a standard garden hose for continuous drainage into your shower or floor drain.
What We Like
Great for Humid Bathrooms
This unit covers up to 1,500 square feet, which means it makes short work of even the steamiest master bathroom. Removing 30 pints of moisture per day keeps your mirrors clear and your grout mold-free.
Energy Star Rated
Running an appliance all day can worry homeowners, but the Tosot helps keep costs down. It is Energy Star rated, meaning it operates efficiently to save you money on your electric bill while reducing your carbon footprint.
Quiet Operation
No one wants a machine roaring while they try to relax in the bath. This unit operates at a low 48 decibels (roughly the sound of a quiet library). Even on the highest setting, it stays unobtrusive.
Smart Memory Function
If you lose power during a storm, you don’t need to reprogram the machine. The Tosot automatically restarts and reverts to your previous settings once the power comes back on.
Easy Maintenance
The reusable air filter slides right out for cleaning. The unit even has a light to remind you when it is time to wash it (usually after 250 hours). Just rinse it with warm water and mild detergent, let it dry, and pop it back in.
What We Don't Like
Wheels Struggle on Carpet
While it has caster wheels, they are quite small. They roll smoothly on tile or hardwood but tend to get stuck on thick rugs or carpet.
Long-Term Durability
Some users reported issues after the one-year mark. While it performs great initially, heavy daily use may shorten its lifespan compared to industrial models.
Product Specs
| Room Coverage | 1,500 square feet |
| Tank Capacity | 1 gallon |
| Pints Per Day | 30 pints |
| Dimensions | 13.4 by 9.9 by 19.5 inches |
| Sound Level | 48 – 52 decibels |
Our Ratings
AirPlus 30-Pint Electric Dehumidifier
Best Portable Bathroom Dehumidifier
The AirPlus offers a sleek, compact design that fits neatly into bathroom corners. It handles spaces up to 1,500 square feet and removes 30 pints of moisture daily.
We like the intuitive interface. It displays current room humidity clearly and allows you to toggle through four different modes with a single switch. It also supports continuous drainage, which is ideal for bathroom setups where a drain is nearby.
What We Like
User-Friendly Controls
The control panel is straightforward. It displays real-time humidity data so you know exactly how the unit is performing. You can set a 24-hour timer or adjust target humidity levels without digging through a complicated manual.
Spill Prevention
You don’t have to watch the tank like a hawk. The auto-shutoff feature powers down the unit the moment the water bucket is full, preventing messy overflows. An indicator light lets you know when it is time to empty it.
Flexible Drainage
It includes a 2.85-pint tank for manual use, which is easy to remove. However, for bathrooms, we suggest using the hose connection. This lets the unit run continuously without you needing to interact with it.
Simple Cleaning
Keeping the air clean helps the machine run efficiently. The filter is accessible from the back; just vacuum it off or rinse it monthly to keep airflow unobstructed.
What We Don't Like
Small Water Tank
The internal tank is small (under 3 pints). If you rely on the bucket rather than the hose, you will be emptying it frequently in a humid bathroom.
Annoying Full-Tank Alarm
When the bucket fills up, the unit beeps loudly to alert you. This is great during the day but can be frustrating if it happens in the middle of the night.
Product Specs
| Room Coverage | 1,500 square feet |
| Tank Capacity | 2.85 pints |
| Pints Per Day | 30 pints |
| Dimensions | 19.61 by 6.69 by 11.3 inches |
| Sound Level | 45 decibels |
Our Ratings
Colzer 140-Pints Dehumidifier
Best for Large Bathrooms
If you have a massive master suite, a wet room, or a spa-style bathroom, small units might not cut it. The Colzer is a beast, capable of removing up to 140 pints of moisture (saturation) per day.
Despite its power, it maintains a modern, slim profile. It features a large 17-pint tank, reducing trip frequency to the sink, and includes a drain hose for set-and-forget operation.
What We Like
Massive Coverage Area
This unit is rated for up to 6,000 square feet. While that is larger than any bathroom, the excess power means it dries out large, steamy rooms incredibly fast. It is perfect for open-concept bed/bath suites.
Large Tank Capacity
Most bathroom units have tiny tanks. The Colzer holds 17 pints, meaning it can run for much longer intervals before the auto-shutoff kicks in.
Smart Humidity Monitoring
The Colzer uses intelligent sensors to read ambient humidity accurately. This precision helps maintain a stable environment rather than constantly cycling on and off unnecessarily.
Hose Included
Unlike many brands that make you buy a separate garden hose, Colzer includes a 6.5-foot drain hose in the box. You can set up continuous gravity drainage immediately.
What We Don't Like
High Noise Levels
Power comes with noise. At higher speeds, the compressor and fan create noticeable vibration and sound. It is not the best choice if you want a silent spa atmosphere.
Struggles with Low Humidity Targets
Some users noted difficulty getting relative humidity well below 50%. It excels at removing bulk moisture but may struggle to make a room bone-dry.
Product Specs
| Room Coverage | 6,000 square feet |
| Tank Capacity | 16.9 pints |
| Pints Per Day | 140 pints |
| Dimensions | 15.7 by 16.5 by 29.5 inches |
| Sound Level | Not specified |
Our Ratings
Madetec Small Dehumidifier
Best for Small Bathrooms
For half-baths or tiny powder rooms, a large compressor unit is overkill. The Madetec is a compact, Peltier-style dehumidifier. This means it uses no compressor, making it lightweight and quiet.
It draws very little power (only about 1kW per day) and fits easily on a counter or toilet tank. It is an affordable solution for small spaces that just need a little extra help drying out.
What We Like
Perfect for Tight Spaces
At this size, you can place the Madetec almost anywhere. It has a tank capacity of about 4 pints and removes roughly 2 pints of moisture daily. It is designed specifically for small, closed-off areas.
Whisper Quiet
Because there is no heavy compressor motor, this unit hums along at around 50 decibels. It is unobtrusive and won’t rattle against the floor or counter.
Simple Operation
There are no complex modes to learn. It features a simple one-button start. It also includes an auto-shutoff sensor that turns the machine off when the tank is full, preventing leaks.
Easy to Drain
The tank slides out from the back for quick emptying. You can also attach a small hose for continuous drainage, which is a rare bonus for a unit of this size.
What We Don't Like
Limited Power
This is not for large rooms or heavy steam. It works slowly compared to compressor models. If you take long, hot showers in a medium-sized bathroom, this unit may struggle to keep up with the steam.
Product Specs
| Room Coverage | 550 square feet |
| Tank Capacity | 4.23 pints |
| Pints Per Day | 2.11 pints |
| Dimensions | 7.87 by 5.31 by 19.89 inches |
| Sound Level | 50 decibels |
Our Ratings
Frigidaire 50-Pint Dehumidifier
Best 50-Pint Bathroom Dehumidifier
The Frigidaire 50-pint is a workhorse designed for reliability and cleaner air. It features a built-in pump (on select models) and high extraction rates, making it ideal for serious moisture issues.
Beyond just drying the air, it helps trap dust and airborne particles. It comes with a one-year warranty and a reputation for solid performance in damp basements and bathrooms alike.
What We Like
Highly Efficient
Despite its high capacity, this unit is Energy Star certified. It removes 50 pints of water per day without sending your utility bill through the roof.
Cleaner Air
Moisture brings bacteria and odors. The Frigidaire includes a washable mesh filter that captures dust and neutralizes airborne odors, leaving your bathroom smelling fresher.
Portability Features
It is a heavy unit, but the caster wheels and integrated side handles make it easy to position. You can roll it into the bathroom for a shower and roll it out into the hallway afterward if space is tight.
Built-In Pump Option
Many 50-pint models in this line include a vertical pump. This allows you to discharge water out of a window or into a sink that is higher than the dehumidifier, eliminating the need for gravity drainage.
What We Don't Like
Reliability Issues
Several customers have reported “F0” error codes or system failures after a few years of use. Longevity can be hit-or-miss.
Pump Failures
If you buy the pump version, be aware that the pump mechanism is a common point of failure. Some users found it stopped working properly after a few months, forcing them to use the bucket method.
Product Specs
| Room Coverage | 1,000 square feet |
| Tank Capacity | 16.3 pints |
| Pints Per Day | 50 pints |
| Dimensions | 24.65 by 11.32 by 16.08 inches |
| Sound Level | Not specified |
Our Ratings
| Product | Best | Room Coverage | Tank Capacity | Pints Per Day | Dimensions | Sound Level |
| Tosot 30-Pint | For High Moisture | 1,500 sq ft | 8 pints | 30 | 13.4 x 9.9 x 19.5″ | 48 – 52 dec |
| AirPlus 30-Pint | Portable Bathroom Dehumidifier | 1,500 sq ft | 2.85 pints | 30 | 19.61 x 6.69 x 11.3″ | 45 dec |
| Colzer Commercial | For Large Bathroom Dehumidifier | 6,000 sq ft | 16.9 pints | 140 | 15.7 x 16.5 x 29.5″ | N/A |
| Madetec Small Dehumidifier | For Small Bathrooms | 550 sq ft | 4.23 pints | 2.11 | 7.87 by 5.31 by 19.89″ | 50 dec |
| Frigidaire 50-Pint | 50-Pint Dehumidifier | 1,000 sq ft | 16.3 pints | 50 | 24.65 x 11.32 x 16.08″ | N/A |
How to Keep Moisture out of Your Bathroom
A dehumidifier works best when you reduce moisture at the source. Try these tips:
- Fix leaks immediately: Even a dripping faucet adds humidity. Fix plumbing leaks before relying on a dehumidifier.
- Ventilate during showers: Run your exhaust fan or open a window while showering. Leave the door open afterward to let trapped heat and steam escape.
- Squeegee surfaces: After a shower, use a squeegee on the glass and tile walls. Wiping down wet surfaces stops that water from evaporating back into the air.
- Dry laundry elsewhere: Hanging wet clothes in the bathroom spikes humidity levels. If possible, dry laundry outside or in a larger, well-ventilated room.
FAQs
What Are the Downsides of a Dehumidifier?
Dehumidifiers can be bulky, produce heat, and consume extra electricity. They also require regular maintenance; if you don’t clean the tank and filter regularly, the unit itself can become a breeding ground for mold and bacteria.
Where Should I Place the Dehumidifier?
Place the unit centrally or near the shower, but keep it a safe distance from direct water splashes. Ensure there is at least 6 to 12 inches of clearance around the air intake and exhaust vents for proper airflow.
How Long Should It Run?
In a bathroom, run the dehumidifier during your shower and for at least 30 to 60 minutes afterward. If the room is naturally damp, you may need to run it for 8 to 10 hours a day or set it to “smart mode” to maintain a specific humidity level automatically.
Do I Need a Dehumidifier if I Have an Exhaust Fan?
Ideally, use both. An exhaust fan removes odors and some steam, but it pushes air out rather than drying it. A dehumidifier actively removes moisture from the air. If your mirrors stay foggy long after a shower, your fan isn’t enough, and you need a dehumidifier.
Should I Open the Window While It Runs?
No, keep windows and doors closed. If you open a window, the dehumidifier tries to dry the air coming in from outside, which overworks the machine and reduces efficiency. Create a sealed environment for the fastest results.
