Buyer's Guide & Information

Best RV Dehumidifiers Reviewed

We have reviewed and compared the RV dehumidifiers on the market. These brands offer comfort when riding in your camper.

Recreational Vehicles, better known as RVs, are a staple of Americana. In our RVs we can travel, camp, rest, shower and see the countryside. All of that travel and showering, though, can make the humidity levels in the RV unbearable.

To combat the humidity problem, you can try various methods, but the absolute best way to lower humidity and prevent mold and other dangers is by using a dehumidifier. This article will cover the best RV dehumidifiers on the market and teach you everything you need to know to make the perfect purchase for your specific RV needs.

Why Install a Dehumidifier in Your Recreational Vehicle?

There are several reasons why you should invest in a dehumidifier for your RV. While the list is long (and potentially keeps growing), let’s focus on the most important factors.

First, mold and mildew are a problem. In such a small living space, humidity and moisture are at a near-constant high. The closed quarters for long periods doesn’t let the moisture dissipate. Mold and mildew need humidity levels above 60% to grow and thrive.

When mold or mildew starts to take form, it can lead to foul odors, musty smells, and even dusty grime on windows, shades and bedding. A dehumidifier will keep the moisture out of the air so it can’t settle on these surfaces. It prevents humidity levels from reaching prime mold growth levels.

Finally, it makes the air you breathe even better. Fresh, cool air circulates as the dehumidifier works to absorb the moisture. While they do put out warmer air in an RV, the air is quickly cooled and can give you a fresh breath, slight breeze, and make the entire living conditions that much better.

RV Dehumidifier Compared

Model Pints/Oz per day Area Size Price
Pro Breeze 9 oz per day 150 sq ft 7 x 6 x 11 inches Check Amazon
Honati 1.6 Pints per day 269 sq ft 9 x 6 x 15 inches Check Amazon
Eva-dry E-500 8 oz per month 62 sq ft 5.5 x 2.5 x 5.5 inches Check Amazon
Eva-dry Edv-1100 8 oz per day 106 sq ft 6 x 8.5 x 5 inches Check Amazon
Dri-Z-Air DZA-U Pot Varies 75 sq ft 5.75 x 6.25 x 5.75 inches Check Amazon
hysure 1 Pint per day 120 sq ft 11.1 x 6.5 x 5.2 inches Check Amazon
Invisi Pure  1.7 Pints per day 125 sq ft 9.8 x 6.1 x 13.9 inches Check Amazon
ALROCKET 16 oz per day 260 sq ft 5.7 x 5.7 x 8.9 inches Check Amazon
SEAVON 9 oz per day 195 sq ft 7.2 x 6.2 x 11 inches Check Amazon

Choosing the Right Dehumidifier for RV Living

RV Dehumidifier Type

When it comes to RV dehumidifiers, you have two basic choices for types. Desiccant dehumidifiers use silica beads to absorb moisture from the air. Small versions are great for hanging in closets, bathrooms, and bedrooms to help control the humidity.

Refrigerant models work similarly to your air conditioner to help purify the air and force the air passing through to condensate. As the air condensates, the humidity is lowered, and the water is collected in a tank or drained through a hose.

Power Consumption

Power consumption is something you need to consider when thinking of your RV. Since dehumidifiers don’t run on propane, you will need to consume as little power as possible to not drain the battery, or find a dehumidifier with an alternate power source.

Most portable desiccant models don’t require any power until it is time to dry out the beads. Refrigerant styles, though, will need electricity. If you plan to be near power connections when you park, these models work best. However, for long camping trips with little amenities or a road trip without the option to plug up, you may decide on either desiccant models or having both.

Capacity & Coverage Area

The dehumidifier needs to be strong enough to lower the humidity in your entire RV. Since RVs come in all shapes and sizes, it is important that you first know the square footage of your space. Once you know that, you can compare that measurement to the capacity of the dehumidifiers you are looking to buy.

Most refrigerant models will have capacities from 300 to 3500 square feet. Desiccant style dehumidifiers will vary based on their capabilities. Portable, powered models can reach up to 500 square feet or more. Non-motorized types will work in a much smaller space, such as a closet or a small bathroom.

Noise Level

In confined spaces like RVs, noise levels can quickly become disturbing. You must get a model with acceptable noise levels so your sleep isn’t disturbed, or you can continue to enjoy a quiet evening watching the stars (or TV) without getting frustrated.

Anything lower than about 56dB will be sufficient for daily activities and those that prefer to sleep with some white noise. However, lighter sleepers may want models that offer lower than 40dB for a more quiet operating machine.


Because storage and moving about is limited inside an RV, you want to look at dehumidifiers that don’t take up much space and are easy to transport. Small, portable models are still powerful enough to get the entire space but can be placed on a counter, under the table, or even in a cabinet (just open the door before you turn it on!).


Most portable models will use a water tank to store the collected moisture in. You will need to empty this tank manually when it is full. Depending on the humidity levels, capabilities of your dehumidifier, and the tank’s size, you may need to empty it daily or even multiple times per day.

Some models will offer a continuous drain option. By connecting a drain hose, you can route the hose to a sink, tub, or toilet and let the water drain as needed without manual interaction.

Other Dehumidifier Features
Filter Indicator Light

Remembering to change the filter on your dehumidifier isn’t going to be something at the top of your priority list. Having a filter indicator light will help, though. These LED lights will illuminate when it is time to change or clean the filter.

Since each model has a different runtime for their filters, having the light is just one less thing for you to worry about.


Being able to set the preferred humidity is a blessing in disguise. Models equipped with an auto-humidistat will get your humidity to the set level and then shut off. This saves you time, effort, and money.

Laundry Settings

Laundry settings are found on some models and help you dry out your clothes faster. Hanging your clothes near the dehumidifier and using the laundry setting will run the unit in continuous mode until you turn it off, regardless of the humidity level.

Adjustable Louvers

Being able to direct the expelled, dried air is a considerable benefit in small spaces such as your RV. Instead of having to deal with the warmer air (especially on a hot, muggy day), you can direct the air with adjustable louvers, so you still get the benefits without having to suffer the effects.


Warranties are as varied as the brands and models. You need to fully understand your warranty before you buy. This will help you know what is covered, what isn’t covered, and for how long.

It is also beneficial to read through the claim process on the warranty so you know what to expect. If you need to register the unit in a specific time frame, maintain proof of purchase or pay for shipping, you need to know before you buy the unit.


The price, of course, will be a significant deciding factor. You want a model that performs to your expectations, but also one that stays in your allotted budget range. There are dehumidifiers of all capabilities, sizes and features in each budget range. A little research will help you ensure you buy the best dehumidifier for you.

9 Best RV Dehumidifiers Reviewed

1. Pro Breeze

Best Small RV Dehumidifier
Moisture Removal 9 ounces per day
Coverage 150 square feet
Water Tank Capacity 0.2 gallons
Noise Level 43 dba
Dimensions 7 x 6 x 11 inches

The best rated RV dehumidifier is from Pro Breeze. This compact unit can fit almost anywhere and doesn’t require any special draining positions. It is the most popular and highly reviewed dehumidifier on the market right now, and for good reason.

Even though it has a small stature, this dehumidifier will remove moisture from the air in spaces up to 150 square feet. Placed in the RV bathroom, you won’t have any worries of mold or mildew growth or the foul odors that come with them.

It uses a Peltier pump for heat exchange, so it is very quiet when ruining. Even running overnight, you won’t have disturbed sleep due to excessive noise. What it will do, though, is remove up to 9 ounces of water from your air every day.

The collection tank holds up to 16 ounces of water and has a spill-proof design, so even on those bumpy back roads, it won’t slosh around and spill. It also features a single button control, with an LED indicator to let you know it is on.

It also features an LED full indicator and will shut off automatically when the tank is full. This saves you from running the unit longer than needed and prevents damage or spilling by overflowing the water tank.

Unfortunately, it only comes with a 1-year warranty. However, customer service is pretty good and easy enough to get a hold of, should you ever need them.


  • Quiet operation
  • Automatic shut-off feature
  • Water tank won’t slosh or spill
  • Good customer service
  • Simple control options
  • LED indicators


  • 1-year warranty
  • May be too small for some RVs

2. Honati

Best Value for the Money
Moisture Removal 1.6 Pints per day
Coverage 269 square feet
Water Tank Capacity 0.5 gallons
Noise Level 39 dba
Dimensions 9 x 6 x 15 inches

The Honati dehumidifier is arguably the best value for the money. It is a small and compact model that features an easy to maintain casing, simple operations, and portable design. This model can go anywhere and works in large rooms or RVs.

The simplistic controls allow you to turn the machine on or off. It will run as long as you have it turned on but consumes a lot less energy than most other constant run options. There is an LED ring around the power button to let you know it is on.

You may need the LED since the machine is so quiet. It runs at less than 39dB, which means it won’t disturb sleep or TV time. The LED will also turn yellow when the tank is full. This is to let you know it is time to empty the tank.

While it pulls a lot of moisture from the air (about 750ml per day), the tank may need to be emptied more often than some other models. However, when the tank is full and the LED turns yellow, the machine turns off automatically until you can empty the tank.

The maintenance is low, too. A simple wipe-off of the mold-proof casing and a rinse out of the filter and you are good to go for at least another 200 hours of runtime. The 1-year warranty is a bit disappointing, but it does also come with a 30-day money-back promise.


  • Low energy consumption
  • Single button control
  • Full tank indicator
  • Low maintenance filter
  • Mold-proof casing
  • Ultra-quiet operation


  • 1-year warranty
  • May need to empty tank multiple times per day

3. Eva-dry E-500

Best Mini RV Dehumidifier
Moisture Removal 8 ounces per month
Coverage 62 square feet
Water Tank Capacity NA
Noise Level 0 dba
Dimensions 5.5 x 2.5 x 5.5 inches

If you are looking for a mini dehumidifier that is simple to use, look no further than Eva-Dry. The E-500 model will work in spaces up to 500 cubic feet (about 62 square feet) to remove moisture from the air.

This desiccant model uses color changing silica beads to absorb moisture. There are no pumps, motors, fans, or water tanks to deal with. Instead, you simply hang the unit wherever you need it the most and let it work.

As the silica absorbs moisture, the beads will change from orange to green. Once they turn dark green, it means the beads are full and need to be recharged. Recharge is a process of drying out the beads so they can absorb more moisture.

This is the only time it will need electricity to function. The small plug on the unit will fit any standard outlet or extension cord. Once plugged in, the internal heating element dries out the beads. It is recommended you do the drying outside or in a well-ventilated area so as not to release the moisture back inside your RV.

This unit comes with a 5-year warranty against defects and craftsmanship and will run smoothly for up to 10 years before needing replacement. However, it is advised to buy multiples to hang around the bath and kitchen areas of your RV, as the beads are only passive and will collect moisture from the ambient air around them only.


  • 5-year warranty
  • 10-year worry-free operation
  • Makes zero noise
  • Hangs up or rests on counter
  • Desiccant beads change color when full


  • May need multiple units per RV
  • Recharge time can take several hours

4. Eva-dry Edv-1100

Energy Efficient Model
Moisture Removal 8 ounces per day
Coverage 106 square feet
Water Tank Capacity 0.4 gallons
Noise Level 51 dba
Dimensions 6 x 8.5 x 5 inches

For those of you looking for a little more oomph from your dehumidifier but want to conserve energy, the Eva-Dry EDV-1100 is your answer. This model specializes in minimizing electrical draw and conserves energy with an auto shut-off feature.

While it doesn’t have an auto-humidistat, it does have a simple, single-button control panel. The unit will run until the tank is full or you shut it off manually. It is ideal for RVs because it only uses 22 watts per hour. Depending on the cost of electricity, this unit can easily operate for less than $20 per year.

The one downside is that the tank is on the small side. With a capacity of only about 16 ounces, the 8 ounces per day removal rate makes the tank fill up quickly. Most users find that they need to empty it in the morning and again before bed to prevent it from shutting off overnight.

However, it is a compact model with a small footprint making it able to sit on a counter, the back of the toilet, or in a cabinet. It will reach up to 106 square feet (1100 cubic feet) and actively moves the air so remove the moisture.

Running for at least 5 hours per day in your RV will quickly drop the humidity level to below 60%, though you should invest in a hygrometer to know precisely where your humidity levels are at.

Unlike the silica bead-based model listed above, this model only comes with a 1-year warranty. Customer service is still great, though, and will help as best they can with any issues or problems you may have.


  • Auto shut-off feature
  • Low maintenance filter
  • Simple operation
  • Fits anywhere
  • No specific drain placements needed


  • 1-year warranty
  • Tank fills at least twice per day

5. Dri-Z-Air DZA-U Pot

Currently On Sale Dri-Z-Air DZA-U Pot
Best Non-Electric Dehumidifier for RVs
Moisture Removal Varies based on ambient temperature and humidity levels
Coverage 75 square feet
Water Tank Capacity 0.3 gallons
Noise Level N/A
Dimensions 5.75 x 6.25 x 5.75 inches

If you store your RV for long periods or just don’t want the hassle of using electricity for dehumidifiers, the Dri-Z-Air pot is what you need. It is easily the best non-electric dehumidifier out there.

Instead of silica beads, the DZA-U pot uses crystals. These crystals are a non-toxic salt called calcium chloride. This naturally occurring mineral absorbs moisture and prevents evaporation. The water is collected at the bottom of the pot, and for long storage you may need to buy the overflow trays.

With your purchase you get about 13 ounces of crystals, which is enough for a single fill. When the crystals are full, you will need to purchase new ones. However, you can find these crystals almost anywhere, such as hardware stores, home improvement stores, and even Walmart.

When buying in bulk, you will want to use about a cup of crystals for each fill. The bucket will hold about 0.3 gallons of collected water and will need to be emptied. However, during use, the collected water will not evaporate back through the crystals.

Your RV will be free from condensation, mold, and mildew growth, and the humidity levels will remain low, even while in storage. While this unit doesn’t come with a warranty, you can contact the manufacturer with any issues you may have and they will help you out.


  • No electricity needed
  • Crystals hold a lot of water without evaporation
  • Can place anywhere there is excess moisture
  • Small design is portable and doesn’t stand out
  • Crystals last a few weeks at a time


  • No warranty
  • Retainer clips may break
  • Might need overflow tray (about $2)

6. hysure

Best Quiet Dehumidifier for RV
Moisture Removal 1 Pint per day
Coverage 120 square feet
Water Tank Capacity 0.2 gallons
Noise Level 37 dba
Dimensions 11.1 x 6.5 x 5.2 inches

If noise is a problem, especially while you are trying to sleep or enjoy a peaceful night on the front porch of your RV, then you want a quiet dehumidifier. The hysure dehumidifier is extremely quiet while also being highly effective at moisture removal.

Like the other refrigerant models on this list, it has a water tank for collection that must be manually emptied. The tank isn’t very large and will need to be emptied about every day or two. However, it will shut off and alert you through LEDs that the tank is full and in need of care.

The filter is also washable, making the overall maintenance low. You can keep this unit in tip-top working order for several years by doing nothing more than a quick wipe down and a filter wash. It also consumes little energy and doesn’t need to run all the time.

About the only thing that would make this unit better was if it had an auto-humidistat. As it stands, though, it is most effective in the RV bathroom. Turning it on while you are in the shower will help reduce condensation in the space and prevent the mirror from fogging.

Letting it run for about 30 minutes after the shower will return the humidity to a more stable level and help fight off mold and mildew. All of this while only producing 37dB of noise. The 1-year warranty should be better, but you most likely won’t ever need to make a claim.


  • Low maintenance
  • Easy to use and empty water tray
  • Will work in any room
  • Will prevent mold and mildew growth when used daily


  • 1-year warranty

7. InvisiPure Hydrowave

Best Large Dehumidifier for RV
Moisture Removal 1.7 Pints per day
Coverage 125 square feet
Water Tank Capacity 0.5 gallons
Noise Level 52 dba
Dimensions 9.8 x 6.1 x 13.9 inches

When it comes to rapid and consistent moisture removal, you want the best. The InvisiPure Hydrowave is the best RV dehumidifier with a drain hose. Used best for RV storage, this model can be set up for continuous draining, so you don’t ever have to worry about water tanks again.

While this model is one of the noisier ones on the list at 52 decibels, it isn’t so loud you need to switch rooms. However, it will remove a lot of moisture in small spaces. Once set up, you can attach a 3/8 inch hose and position the unit above a drain spot.

Gravity will take care of the rest. Giving you the freedom to set it and forget it while the unit drains directly through the hose instead of into a collection tank. If you do decide to use the tank, the machine will turn off automatically and alert you through an LED that the tank is full.

If you plan to store your RV over the winter, placing this unit inside will help control mold and mildew, condensation, and keep the air fresh and clean when you return in the Spring. It only has a 1-year warranty, but customer support is there for as long as you own the unit.


  • Lifetime customer support
  • Continuous drain option bypasses water tanks
  • Compact size won’t take up storage space in the RV
  • Simple control panel with LED indicators


  • 1-year warranty
  • Has a larger power draw than other units

8. ALROCKET Dehumidifier

Best Looking Design
Moisture Removal 16 ounces per day
Coverage 260 square feet
Water Tank Capacity 0.3 gallons
Noise Level 39 dba
Dimensions 5.7 x 5.7 x 8.9 inches

If you want sleek, stylish, and easy to look at design, look no further. The ALROCKET dehumidifier is the best looking design out there. The unit is small and portable, with lights, and audible alerts, making your RV moisture-free and more enjoyable.

The LED light show uses 6 different colors to cascade through the fill tank. However, if you prefer a single color, you can lock the color of your choice. You also have the option to turn the lights off altogether.

What you can’t turn off, though, is the red LED and audible beeping that indicates the tank is full. The machine will beep three times, flash the red LED, and shut off. This not only lets you know the tank is full but also prevents damage or overfilling.

The tank can hold about 1000ml of water, but the alarms will sound when the tank is about 80% full, so you won’t get maximum capacity. This can be a problem for some, but it makes emptying easier since the tank isn’t full to the brim.

There isn’t a humidistat, so you cant control the humidity level, but you can turn the machine on or off when needed, such as during a shower or while cooking. It is also quiet enough to run overnight while you are sleeping, so you can rest easier and wake up to lower humidity.


  • Lifetime customer support
  • Multi-colored LED night light
  • Auto-shutoff
  • Audible and visual full tank indicators
  • Compact and portable design


  • 1-year warranty
  • No humidistat


Popular Portable Model
Moisture Removal 9 ounces per day
Coverage 195 square feet
Water Tank Capacity 0.25 gallons
Noise Level 40 dba
Dimensions 7.2 x 6.2 x 11 inches

Rounding out our list is one of the most popular portable dehumidifiers on the market. SEAVON uses a compact design to house their machine and makes the most use of its abilities. Nothing about this unit is big, except for the moisture removal power it possesses.

This compact model will treat the air in spaces up to almost 200 square feet. It also features a quiet operation so it doesn’t disturb the TV, sleep, or conversation. Without a continuous drain, you will need to empty the tank when it gets full.

However, the machine will shut off on its own and illuminate an LED to let you know it is time. If you run the unit continuously, you can expect to empty the tank about every other day, depending on the humidity levels in the RV.

For those worried about energy consumption, this model only draws about 20kw and will drain your battery much slower than most other models on this list. However, once you are plugged into an electrical supply, there won’t be any spike from its use.

Customer service is kind of a pain. While they are happy and eager to help, they only work through email. This can add time to your query or concerns and makes it difficult to make a timely warranty claim. The warranty covers 12 months, though, so you have some time to get everything sorted.


  • Simple design
  • Automatic shut off with LED indicator
  • Treats up to 2000 cubic feet
  • Low energy draw
  • Low maintenance


  • 1-year warranty
  • Not the best customer service

How a Dehumidifier Works to Remove RV Moisture

High humidity and excessive moisture can easily build up in an RV. Unlike a home, there is less space, meaning more moisture per square foot. Moisture comes from the obvious places, such as running the shower, sinks, and even the toilet.

However, it also comes from unexpected places like the stove, oven, and coffee pot. In an RV, humidity can rise rapidly and needs to be controlled. The dehumidifier works to remove excess moisture and lower humidity through condensation or absorption.

Refrigerant models work to chill coils, much like your AC evaporator. Warm, humid air is brought in, passed over the cold coils where the air condensates. The condensate runs down into the collection tank or through the drain hose where it can be removed from the RV.

Silica gel beads or desiccant dehumidifiers work by absorbing moisture from the air as it passes through the beads or over the filter like membrane filled with desiccant. Unlike refrigerant models, desiccant models don’t warm the air, nor do they have collection tanks.

You will either need to replace the desiccant when it is full (cheaper models) or recharge the desiccant by baking it in the oven or turning the unit on so a heating element can dry them out (rechargeable models).

Determining the Right Size RV Dehumidifier

When you are trying to figure out what size dehumidifier you need for your RV, several factors come into play. First, you need to determine the size of your RV. In most cases, this requires knowing the square footage. However, because the space is smaller than a home, knowing the cubic foot measurement is helpful.

To get the square footage, you take the length times the width. For cubic feet, you also multiply the height. In most situations, this will be all you need. A corresponding dehumidifier will fit the measurements you have come up with.

However, you also need to factor in other things for the RV, such as ambient temperature and average humidity levels. You can use a hygrometer to measure the humidity level, which is a stand-alone device or can be included in other air quality measurement tools.

Finally, you should factor in the power requirements. You may not always have an electrical source. If your batteries aren’t strong enough to run all of your appliances, you may need to settle for models that run on batteries or use no power at all.

Tips for Installing RV Dehumidifiers

Installing your dehumidifier shouldn’t be too much of a pain, but there are things to think about before making your purchase. First, you should consider where the appliance will go. Near the bathroom or in the kitchen are the obvious choices, but only if there is room.

Smaller, portable models can fit on a counter or under a sink, but larger models may not. You also need to consider draining options. If you use a model with a water tank, you will need to place it in an area with easy access so you can empty the tank.

For continuous drain models, you will need to position the dehumidifier near and above the drain (for gravity drain systems) or within reach of the drain hose length (for pump drain options).

People Also Ask (FAQ)

What’s the ideal humidity level for an RV?

For optimal air temperature, moisture control, and lowered risk of respiratory issues, the ideal humidity level should be between 30 and 60%. Anything under 60% will inhibit mold and mildew growth, but you may want to go even lower than that. New studies reveal that a humidity level of 43% can also inhibit and even stop flu viruses.

However, as long as you maintain a humidity level above 30% and below 60%, you will be in the ideal target range.

Is it OK to run a dehumidifier when the RV AC is running?

As far as the ability to do so, you can run a dehumidifier and your RV AC at the same time; you just may not want to. Both units will lower humidity and may cause humidity levels to drop below 30%. However, running the dehumidifier before using your AC can make the AC run more efficiently, as it doesn’t need to run as long to cool air with a lower humidity level.

Will a dehumidifier drain my RV’s battery?

If you are not connected to a power source, and the dehumidifier needs electricity to run, then yes, your RV battery will get drained as the dehumidifier runs. Being able to charge the RV battery, of course, will offset this. But run for long enough, and your RV battery may be completely dead.

What are RV dehumidifier crystals?

RV dehumidifier crystals are nothing more than calcium chloride. Usually, these crystals are sold in packages that you empty into a pail or bucket. It works the same as a desiccant dehumidifier; you just usually cannot tell when the crystals are full, and you won’t be able to recharge them effectively.

Where is a good place to buy these units?

Among the best places to shop for an RV dehumidifier are, of course, your RV supply store. However, home improvement stores such as Lowe’s and Home Depot (or even Walmart) will carry dehumidifiers for you to choose from.

The best place, though, is through Amazon. You can be sure that the model you want is in stock and at the best possible price. You will also have more options to choose from since Amazon isn’t restricted to selling only the current year models.


Choosing the best RV dehumidifier doesn’t have to be that hard. This article covered how to determine the type and style of dehumidifier that is right for you. We also showcased the 9 best RV dehumidifiers to fit your RV based on size, power source, and capabilities.

If you are still on the fence about which model to choose, look again at our top pick. The Pro Breeze dehumidifier covers 1200 cubic feet, has an easy to empty collection tank, and automatic shut-off so it won’t make a mess if you forget to empty it on time.

Josh M