When humidity levels rise above 50 percent, they provide a fertile breeding ground for mold, mildew and dust mites which can trigger and aggravate respiratory issues. Bathrooms are mostly at risk because hot showers, spilled water and poor ventilation create a warm and moist environment where mold and dust mites thrive. The best dehumidifier for bathroom optimizes humidity levels by drawing out excess moisture from the atmosphere to prevent the proliferation of allergens and eliminate the musty odor associated with dampness.
We reviewed several bathroom dehumidifier models based on these significant factors; type of dehumidifier, tank capacity, dehumidification performance, size of coverage, and noise levels, among others. The type of dehumidifier will determine its mode of operation, while tank capacity will be dictated by the level of dampness and the area to be covered. We also evaluated noise levels and coverage area to get you the quietest models and the most extensive protection for your bathroom. Finally, we reviewed their dehumidification performance based on their effectiveness in optimizing humidity levels.
Top 9 Dehumidifiers for Bathroom Review 2020
After comparing the performance of several models, we generated a list of the best dehumidifiers and captured their ranking in a comparison table incorporated in this review. The article also includes an in-depth review of their features, assets and any existing tradeoffs, followed by a buying guide that elaborates more on the crucial factors that determine the best dehumidifier for bathroom model. The review ends with an FAQ section, and a summary of our top three picks.
Eurgeen Compact 20 Pint Portable Dehumidifier – Editor’s Сhoice
- Type: compressor
- Water tank capacity: 50.7 oz.
- Dehumidification (oz. per day): 320
- Coverage area: up to 200 sq. ft.
- Dimensions: 11.02 x 6.69 x 19.09 inches
- Warranty: not specified
More features: two speed settings; automatically switches off when the tank is full and the full indicator light lights up
This model is a compressor or refrigerant type of dehumidifier. Air drawn by a fan is passed along very cold coils which causes condensation. The condensate then drips into the reservoir. The cool air is then heated and pumped back into the atmosphere.
A sizeable bathroom measuring 200 square feet can be effectively protected from mold and mildew by this dehumidifier with a moisture extraction rate of 320 ounces a day, and a water tank with a capacity of 50.7 ounces. Once the tank is full, an indicator light turns on, and the unit automatically switches off to prevent overflowing of water.
A drain hose is provided for the option of continuous drainage. Since the hose does not have a pump, you should place the dehumidifier at an upper location so water can drain to the sink with the help of gravity.
There are digital controls to program your preferable humidity level between 40% and 80% at 5% increments. You can select any of the two fan speeds as well as the Clothes Dry option for higher performance.
The vent located at the top makes it easier to install the unit next to walls and other surfaces without worrying about obstruction of air flow. Other features include a relatively quiet operation at 50 decibels and four castor wheels for improved mobility and storage.
- High extraction rate
- Sizeable coverage
- Continuous drainage option
- Digital controls
- Auto shut-off safety feature
- Unspecified warranty
- Should be placed at an upper location for continuous drainage
Ivation 13-Pint Small-Area Desiccant Dehumidifier – Best Desiccant Dehumidifier
- Type: desiccant
- Water tank capacity: 61 oz.
- Dehumidification (oz. per day): 208
- Coverage area: up to 270 sq. ft.
- Dimensions: 10.6 x 6.85 x 17.35 inches
- Warranty: 1-year limited
More features: washable air filter; LCD interface; adjustable fan
This Ivation model is a desiccant type of dehumidifier, although it has several advanced features mostly available in electric models which utilize a compressor. It is particularly designated for spaces in motion, such as bathrooms in recreational vehicles. Sudden movement activates the anti-tilting automatic shutoff feature to avoid spillage when the RV is in motion.
It has a dehumidification rate of 208 ounces per day which can cover spacious bathrooms measuring up to 270 square feet, in temperature as low as 0.56 degrees Celsius. The included water tank has a capacity of 61 ounces with continuous drainage facilitated by a drain hose.
There are multiple settings including variable fan speed, screen brightness, timer, and sleep mode which can be activated or adjusted on the user-friendly LCD panel.
A built-in humidistat keeps track of humidity levels at increments of 5% while the automatic restart function comes in handy after a power outage. The noiseless operation and the durable, washable air filter are additional benefits of owning this dehumidifier.
- Anti-tilt auto shut-off function
- Continuous drain option
- Adjustable fan speed
- Washable air filter
- Timer and sleep mode
- Built-in humidistat
- Quite heavy
- The performance is lower than other models possess
Frigidaire 30-Pint Dehumidifier – Best Medium Size Dehumidifier
- Type: refrigeration
- Water tank capacity: 120 oz.
- Dehumidification (oz. per day): 224
- Coverage area: not specified
- Dimensions: 10.5 x 13.8 x 20.5 inches
- Warranty: 1-year full parts and labor; 5-year limited on sealed system
More features: three speed settings; removable washable filter; 24-hour on/off timer and control lock
This is the unit you should consider if you are looking for the best portable dehumidifier for the bathroom with a high moisture extraction rate.
With a tank that can hold 120 ounces of water extracted from the air at a rate of 224 ounces a day, this refrigerant model will dry out your bathroom to prevent breeding of microbes and thriving of mold. The unit automatically switches off once the full tank alert goes off to avoid the spillage of water. You also have the option to drain the extracted water into an external drainage system using a hose that is acquired separately.
It features a digital LED display where you can select high, medium or low speeds, and an on/off timer. The panel displays the current humidity level and other selected modes.
On low speed, it runs quietly at 46.1 decibels which is hardly a disturbance. Consumption of 320 watts on maximum settings makes this unit energy efficient, a characteristic that has been recognized and certified by Energy Star. It also includes a removable washable filter, control lock system, four castor wheels, and top and side handles for smooth mobility.
Owners have been impressed with its performance however some customers are annoyed with the frequent automatic switching on and off of the unit to check on humidity levels. The purchase comes with an attractive warranty of one year on full parts and five years of limited warranty for the sealed system.
- LED digital display
- Three speed settings and timer
- Energy Star certification
- Quiet operation
- Handles and wheels
- Long warranty
- Unit goes on and off frequently
Frigidaire FAD301NWD – Best Dehumidifier for Large Bathroom
- Type: refrigeration
- Water tank capacity: 192 oz.
- Dehumidification (oz. per day): 480
- Coverage area: up to 1400 sq. ft.
- Dimensions: 19.8 x 11.54 x 14.57 inches
- Warranty: 1-year full parts and labor / 5-year limited on sealed system
More features: continuous drain option; 6-feet three-prong power cord; Energy Star certified
FAD301NWD is one of the smaller and lighter Frigidaire dehumidifiers with several useful features that make it a good investment. It removes up to 480 ounces of moisture from the air in 24 hours, which it then drains into the 192-ounce reservoir. The high moisture extraction rate is valuable for those shopping for the best dehumidifier for bathroom with no vent.
Once the tank is full, the system alerts you and then shuts down if the tank is not emptied immediately to avoid spillage. Since the tank can fill up rapidly in high humidity, the continuous drain option that allows you to attach a hose for external drainage is helpful because you do not have to empty the tank constantly.
This model dehumidifies bathrooms of up to 1400 square feet of coverage, and you can set your preferred humidity level between 35 and 85 percent.
The dry air is emitted by an exhaust output conveniently situated at the top of the unit. This makes it easy to set up the dehumidifier against walls and compact bathroom spaces without worrying about obstruction of free air flow as would be the case with a side vent. More options for setup and storage are availed by the three-pronged six-feet long power cord which eliminates the need of an extension and secures the unit out of reach of children, or the prevalent water in the bathroom. Clean air is achieved with the removable washable filter which eliminates bacteria, odor and other airborne particles.
Mobility and portability are enhanced by top and side handles and castor wheels that can easily roll the unit in and out of the bathroom. There is a manual control at the top of the unit with a timer for smooth operation.
This unit uses refrigeration for dehumidification, so some people might find it noisy because of the fan and compressor.
It is equipped to run efficiently in temperature as low as -23 degrees Celsius without the risk of clogging by frost. This also reduces energy bills. Optimal performance at the minimum consumption of energy has earned the FAD301NWD the Energy Star certification.
- Long power cord
- Continuous drain option
- Filter improves air quality
- Convenient top vent
- Removable washable filter
- Energy Star certification
- Manual control
- Lacks multiple fan speed settings
- No digital display
Eva-dry E-333 Renewable Mini Dehumidifier – Budget Pick
- Type: desiccant (silica gel)
- Capacity: 8-10 oz.
- Coverage area: up to 333 ft3.
- Runtime: 20-30 days before renewing; up to 10 years
- Dimensions: 2.8 x 9 x 8.3 inches
- Warranty: 5-year limited
More features: requires no batteries; contains crystals that indicate when the unit reaches its capacity
If you are looking for an affordable rechargeable, super quiet dehumidifier that will save you money on power bills and replacement batteries while keeping your 333-square foot bathroom dry, Eva-dry E-333 is your best option.
It is a desiccant type of dehumidifier which uses silica gel in a plastic frame to remove water from the air through adsorption and does not include a water tank at all. Once the silica gel is saturated with moisture, the crystals change color from orange to green. You can monitor this change through the display on the side. Previous versions would turn from blue to pink.
Once this happens, plug the unit into power to recharge it for about eight to ten hours, a process that will heat up the silica gel to discharge the moisture collected. It is advisable to recharge this unit in a well-ventilated different room from the one you are trying to dehumidify so the moisture does not recirculate.
It removes eight to ten ounces of moisture from the atmosphere and can last up to a month before it requires recharging, and up to ten years before necessitating replacement. In more humid conditions, it can reach its capacity faster which will still be a couple of weeks, thus convenient.
This model is suitable for small and less humid bathrooms with coverage of 333 square feet. It runs noiselessly, and there is no risk of mechanical breakdowns because it does not have moving parts. Many customers have praised its performance and longevity.
- Requires no electricity or battery to operate
- Quiet operation
- No risk of mechanical breakdown
- Lasts up to a decade
- Low capacity
- Recharging takes time
- Doesn’t perform as quickly as electric models
EcoSeb DD122EA-SIMPLE – Best Dehumidifier for RV Bathroom
- Type: desiccant
- Water tank capacity: 67.2 oz.
- Dehumidification (oz. per day): 240
- Coverage area: not specified
- Dimensions: 11.4 x 19.1 x 6.9 inches
- Warranty: 2-year limited
More features: operates at 34 dB; no compressor; optional continuous hose; anti tilt protection
As a desiccant dehumidifier, this model is optimized to quickly remove moisture in atmospheres that are as low as 1.11 degrees Celsius, an impossible feat with compressor models, making it the best dehumidifier for bathroom mold.
It has a moisture extraction rate of 240 ounces in a day, and a water tank with a capacity of 67.2 ounces. A hose that is three feet long is included for the option of continuous drainage into a sink or sewage, thus saving time on constant emptying of the water tank. Spillage is avoided with the anti-tilt feature which automatically shuts down the unit in case it falls over. This makes it a decent RV dehumidifier. This model also stops working automatically once the full tank alert goes off.
An integrated sensor detects humidity levels and automatically switches on the dehumidifier to regulate moisture levels, then switches it off once optimal conditions between 35% and 80% that you had custom set with the rotary dial have been achieved. This prevents it from running unnecessarily and subsequently saves energy. Optimal humidity conditions are also maintained through the Overdry Protection feature in Laundry mode. Other modes are low, high and medium.
In addition to several advanced features, this dehumidifier operates at a noise level of 34 decibels, which is lower than that of a regular conversation. The adjustable louver situated at the top allows you to direct the emitted dry air to colder sections in your bathroom. The manufacturer also offers a generous two-year limited warranty upon purchase.
- Effective at low temperatures
- Built-in sensor
- Anti-tilt protection
- Auto-restart and auto shut-off power saving function
- Overdry protection
- Short drain hose
- No timer and digital display
hOmeLabs Small Dehumidifier – Best Dehumidifier for Small Bathroom
- Type: peltier
- Water tank capacity: 16 oz.
- Dehumidification (oz. per day): 9
- Coverage area: up to 150 sq. ft.
- Dimensions: 6.5 x 5.3 x 8.5 inches
- Warranty: not specified
More features: auto shut-off and LED indicator when tank is full; energy efficient 25W ETL certified adapter to prevent overheating
This model features thermoelectric peltier technology which transfers heat from one end of the dehumidifier to the other end via electrical energy. It covers a room of 150 square feet and can extract nine ounces of water from the atmosphere in a day, which makes it ideal for small bathrooms.
At a dimension of 6.5 x 5.3 x 8.5 inches, its compact size and power cord length of six feet give you more flexibility when installing it in restricted spaces.
The water tank has a capacity of 16 ounces so you will only need to empty it every two days if the humidity levels are not high. An LED indicator light notifies you once the tank is full, and the unit automatically shuts down to prevent overflowing of water.
Since peltier technology does not consist of a compressor, the dehumidifier runs reasonably quietly. The 25W adapter is ETL-certified for energy efficiency when preventing overheating.
The manufacturer recommends cleaning of the unit after every seven days with a smooth fabric for the exterior and a swift brush for the air inlet grills. Ensure you empty the tank regularly because this unit cannot be connected with a hose to an external drainage.
- Quiet operation
- Auto shut-off feature
- LED indicator light alert
- ETL-certified adapter
- Small and compact
- Low capacity
- No external drainage
Hysure Electric Mini Dehumidifier – Best Portable Dehumidifier
- Type: peltier
- Water tank capacity: 24 oz.
- Dehumidification (oz. per day): 3
- Coverage area: up to 215 sq. ft.
- Dimensions: 6.4 x 4.2 x 10.5 inches
- Warranty: 30-day money back guarantee; 2-year limited
More features: one-button operation; auto shut-off
Featuring a water tank with a capacity of 24 ounces and a dehumidification rate of 10.3 ounces in a day, this is the best compact dehumidifier for bathrooms. Safety is enhanced with the automatic shut-off feature once the yellow LED light indicates a full tank.
It uses peltier technology which is known for the noiseless operation because it does not use an air compressor. The noise level on this model is less than 33 decibels.
The sleek-designed dehumidifier is light and portable at 2.7 pounds which makes it convenient to set it up anywhere in a small bathroom measuring up to 215 square feet whose temperature is higher than 20 degrees Celsius, and humidity levels greater than 60 percent.
It is easy to operate it by pressing the button located at the top of this unit, and it is economical with minimal energy consumption of 23 watts only. Unfortunately, you cannot use a drain hose with this model for external drainage, so ensure you empty the water tank when full.
- Easy one-button control
- Noiseless operation
- Energy efficient
- Auto shut-off mechanism
- Effective for small bathrooms
- No external drainage
- Low capacity
1byone Electric Mini Dehumidifier – Best Quiet Dehumidifier
- Type: peltier
- Water tank capacity: 14 oz.
- Dehumidification (oz. per day): 6
- Coverage area: up to 161.5 sq. ft.
- Dimensions: 6.65 x 4.92 x 8.46 inches
- Warranty: 90-day money back guarantee; 1-year limited
More features: comes with a DC adapter; ultra-quiet operation
Featuring peltier or thermoelectric technology, this unit is suitable for small-sized bathrooms up to 161.5 square feet. As its name implies, it has mini features with a water tank capacity of 14 ounces and a moisture extraction rate of six ounces in a day that are adequate for tiny spaces but can be too low for large bathrooms.
The lack of a compressor and moving parts makes it very quiet and light in weight at only 980 grams.
An LED light indicates when the tank has reached its maximum capacity and the dehumidifier automatically switches off to prevent water overflowing to the floor. The unit includes a filter that is both removable and washable, which saves money on filter replacement costs.
Buyers found this mini model effective in optimizing humidity levels in small rooms, and they also loved its tiny size. However, if your bathroom is sizeable, this unit might not work for you.
- Compact size
- Full tank indicator
- Safety auto switch-off feature
- Washable filter
- Small capacity
- Low dehumidification rate
- Ineffective for large bathrooms
- No programmable humidity controls
Why does your bathroom need to be dehumidified?
Bathrooms provide the perfect warm and moist environment for microbes, mold, and mildew to thrive: hot showers that generate a lot of steam, poor ventilation due to space limitations, and water everywhere - splashed, spilled or leaking. The presence of microbes in the atmosphere makes us vulnerable to allergies and other respiratory complications while mold and mildew ruin our clothes, valuables, and structures. There is also the embarrassing odor that is common in damp environments.
Your bathroom needs to be dehumidified to extract the prevalent excess moisture from the atmosphere for clean, breathable air. Dehumidifiers also come with filters that keep airborne allergens under control.
Features to consider while choosing a dehumidifier
The best dehumidifier for bathroom models should be evaluated based on the following features.
Knowing the different types of available dehumidifiers and the technology they use will help you choose the most suitable one for your needs. There are three main types of dehumidifiers:
These are also known as thermoelectric or peltier dehumidifiers because of the peltier module that they use to operate. Peltier is an electronic device which entirely depends on electricity to create a difference in temperature in the two heat sinks on each of its two sides. As the warm, humid air passes through the cold heat sink, moisture is extracted into a reservoir, and then the hot heat sink heats up the air before releasing it again into the atmosphere. Peltier models are smaller because they do not use a pump or compressor, only an electronic module, two heat sinks and a fan. They are also the quietest for the same reason. The downside is that this type of dehumidifier cannot operate without electricity. It also generally has a lower dehumidification rate than compressor and desiccant models.
Also known as refrigerant or compressor dehumidifiers, they work by drawing warm air over a refrigerated coil which causes condensation. The condensate is dripped or pumped into a reservoir, and then the cool air is heated and pumped back into the room. The pump speeds up dehumidification by drawing in and emitting large volume of air. Compressor models also feature large coils which extract more moisture because, unlike peltier or thermoelectric models, they use an integrated compressor to cool the coils instead of depending on electrical power only. The additional components, including a fan, a pump and compressor, make them heavier, larger and louder than other types. They usually have the best moisture removal rate provided the room is not so cold that it causes frosting on their refrigerated coils.
This type is also referred to as chemical absorbent dehumidifier. Unlike the other two types, this dehumidifier does not require electricity. A rotor draws air to the desiccant which removes moisture through adsorption. Once saturated with moisture, the desiccant is heated to recharge it and release the trapped moisture so it can continue to extract more moisture from the air. The best advantage of this technology is its effectiveness in extremely low temperature because the desiccant’s adsorption rate is unaffected by the room’s temperature. It also lasts weeks and months before it needs to be recharged.
Water tank capacity
Generally, the higher the rate of moisture extraction, the higher the maximum volume of water the tank can hold. A greater capacity eliminates the need for frequent emptying of the water tank. Frigidaire FAD301NWD has a water tank with a capacity of 192 ounces which can hold the large volume of moisture extracted from the air in big bathrooms.
This refers to moisture extraction capacity, and is measured by the amount of excess moisture the dehumidifier can remove from the air in 24 hours. This should guide you on getting the right dehumidifier for your humidity needs. Since humidity levels in bathrooms are typically high, choose a model with high dehumidification rate, such as Eurgeen Compact 20 Pint Portable Dehumidifier which extracts 320 ounces of moisture from the air in a day. If possible, always opt for higher moisture removal capacity than you need to accommodate fluctuating air conditions.
Calculate the size of your intended bathroom, including the height, and match it to a dehumidifier that can effectively process the volume of air in that space so you do not end up with a model that will underperform. Manufacturers indicate the size of space that their dehumidifiers can cover.
Almost all types of dehumidifiers feature a fan whose size and speed can affect the level of noise it produces. But fans are hardly the culprit because even at their loudest, they mostly produce white sound. On the other hand, compressor models additionally have pumps, compressors and other movable parts which can generate substantial buzzing and vibration noise.
The dehumidifiers featured in our review all run quietly. Despite being mechanical models, Eurgeen Compact 20 Pint Portable Dehumidifier and Frigidaire 30-Pint Dehumidifier have sound levels of 50 dB and 46.1 dB respectively. EcoSeb DD122EA-SIMPLE, a desiccant model, runs at 34 decibels. For perspective’s sake, a normal conversation has a sound level of 50 decibels.
Dimensions and weight
The size and weight of a dehumidifier should be determined by the space to be covered and the level of humidity. Portable models are light in weight and compact. This makes them convenient to move and install in bathrooms with space limitations.
The size and weight can also indicate the type of unit, area of coverage, and water tank capacity. Compressor models are larger and heavier than other types due to the additional mechanical components but handles and castor wheels improve maneuverability. They also have the best moisture extraction rate in room temperature or warmer conditions. Frigidaire FAD301NWD is 19.8 x 11.54 x 14.57 inches with 1400 square foot coverage while 1byone 400ml Electric Mini is only 6.65 x 4.92 x 8.46 inches with 161.5 square foot coverage.
Familiarize yourself with warranties of different brands and any added incentive like the 30-day money back guarantee for Hysure Electric Mini Dehumidifier. You can get that information online from verified buyers and authoritative reviews such as this one.
These are some of the features that will improve convenience, save time, energy and money, and add value to your overall moisture removal experience:
- LED/LCD indicator for full tank alert;
- multiple speed settings for energy efficiency and less noise;
- auto shut-off feature after full tank alert to avoid water spillage;
- timer for delayed start;
- on/off feature for automatic restart after power outage;
- programmable humidity controls;
- digital display for feedback;
- integrated humidistat;
- auto defrost for unit protection in low temperature;
- continuous drainage option;
- removable and washable filter to prevent clogging and to purify air;
- handles and castor wheels for maneuverability;
- Energy Star certification.
Leave space of at least six inches around the unit for free air circulation. Clean the filter regularly to prevent clogging and keep allergens away. Clean the air inlet and outlet periodically. Unplug the dehumidifier from power before cleaning or emptying it. Keep the power cord away from water and children to prevent shock. Above all, ensure that you get the right model with moisture extraction capacity for your bathroom size.
It is safe, but it is not advisable. You risk splashing water on it and overworking it to reduce the warm, moist air generated by the hot steam
Dehumidifiers are safe. They actually improve our health by making our environment unfavorable to airborne microbes, mold, mildew, and dust mites.
Eurgeen Compact 20-Pint Portable Dehumidifier and Ivation 13-Pint Small-Area Desiccant Dehumidifier tied in the top position because of their advanced features which will transform your bathroom from damp to dreamy. They both have high extraction capacities, sizeable coverage, multiple speeds, programmable humidity levels with 5% increments, built-in humidistat, digital controls, auto shut-off safety function, and quiet operation. Although they use different techniques of moisture extraction since one is a compressor and the other one is a desiccant, their output is impressive. We only wish the water tanks had higher capacity. Thankfully, the continuous drainage option present in both models offers more convenience.
Frigidaire 30-Pint Dehumidifier made it to our top selection because it combines powerful performance with portability and a long warranty. Three speed settings, LED digital display, timer, safety auto-off mechanism after full tank alert, energy efficiency, handles and castor wheels for easy maneuverability are precisely what you need in the best portable dehumidifier for the bathroom.