best rv dehumidifier review

Best RV Dehumidifier – Reviews and Guide 2020

If you love escaping from the hustle and bustle of daily life, you probably prefer living for some days in the mountains or countryside in your recreational vehicle (RV). Of course, no idea is better than packing your RV and heading out to the open road for a couple of weeks.

While traveling and staying the nights in your RV is the best idea, the time you spend in there can create some hassles later on. In other words, RVs are usually of small size and therefore can end up as a damp and humid environment. From cooking and showering to sleeping and eating, all these activities in such a small space will lead to an inevitable build-up of water condensation. Water in your RV is a very bad thing. I will repeat. Water in your RV is a VERY bad thing.

The presence of water vapor can cause great damage to your recreational vehicle. It can harm your soft furnishings and make your formerly cozy RV feel quite uncomfortable. In the end, you might be left with the option of shortening your vacation time when the atmosphere inside your RV becomes problematic and unbearable. It is supposed to be a vacation, not a humidity torture excursion!

Indeed, excessive humidity or the presence of water vapor in the RV can cause breathing problems and other health issues, particularly to people with asthma or allergies. After experiencing this, you may even think about giving up on your RV. However, you do not have to. A dehumidifier can help control the excess moisture in your recreational vehicle. Science to the rescue!

Choosing the best dehumidifier for your RV is the next concern. To help better understand, we are providing you with a guide encompassing the benefits, functionality, types, and more about dehumidifier.

Advantages of Using Dehumidifiers for an RV

As earlier mentioned, excessive moisture in your RV can create several problems. On the other hand, using a dehumidifier can help keep your traveling vehicle’s atmosphere comfortable and free of dust and allergens. Here are some benefits of installing a dehumidifier in your RV.

Prevent Millipedes & Other Pests

Due to being a small and enclosed space, your RV is more susceptible to developing excess moisture, which further encourages the development of many small insects who might tag along as unwanted guests (Hey, you love camping, and apparently so do they!). Not to mention, spaces with a damp environment are ideal locations for pesky insects, including millipedes and other critters too numerous to mention. Unless you plan on becoming a scientist and applying for a government grant to study various species of RV inhabiting insects, we suggest installing a dehumidifier with deep-cycle RV battery in your RV to help reduce the chances of unwanted guests.

Stop Condensation

Most RVs walls are coated with paint or made up of wooden plies. However, some RVs use wallpaper to give the interior a home-like appearance. No matter the material, the wallpaper can peel and the paint can blister inside the RV due to excessive levels of moisture. However, running a dehumidifier, you can prevent condensation.

Eliminate Dust Mites and Other Allergens

When your RV has excessive humidity, you are likely to see dust mites inside the vehicle. It is no secret that dust mites encourage the growth of other allergens that can cause allergies, asthma, and breathing problems. In case you already have been experiencing dust mites in your RV, installing a dehumidifier is one of the best solutions to this problem.

Prevent Rusting and Warping

Excessive humidity can cause wood to warp and metals to rust. It follows that if the internal environment of your RV is damp enough, that excess moisture can wreak havoc on your vehicle. You know, the kind of expensive havoc that is unsightly to look at. As a result, you may have to deal with several problems that will arise because of excessive humidity in your RV.

Furthermore, these damages will be quite costly, and thus you will need to spend a hefty price fixing the problems of your damaged RV. However, putting a dehumidifier with the best travel trailer battery in your vehicle will help control the levels of moisture inside, thereby preventing rusting and warping.

Ensure Good Health

Since a dehumidifier maintains moisture levels in the RV, it will help protect you, your family, and friends from several health issues caused by excessive humidity. In this manner, a dehumidifier will help ensure the well-being and health of you and your companions. Furthermore, with a dehumidifier your comfort level will increase. In fact, it will make the environment of your RV cozy and MUCH more comfortable. Unless you enjoy camping in the middle of an Amazonian rainforest during the rainy season, the dehumidifier is your best bet for a more comfortable RV.

Protect Valuable Stuff Inside

While traveling, many take important and potentially valuable possessions with them. This may include food, personal care items, portable lights, clothes, and much more. Note that most of the items carried in an RV are susceptible to humidity and can be damaged by excessive moisture. Using the best dehumidifier for RVs will keep all these items in better condition, and you will have less of a hassle.

How it works?

Dehumidifiers use the thermodynamics of refrigeration to extract moisture from the atmosphere. These refrigerant dehumidifiers consist of four basic parts: fan compressor, reheater, reservoir, and compressor cooling coils. The fan compresses and then expands the refrigerant to cool the coils. The reheater captures the heat that is produced during the cooling process. The coils are filled with refrigerant. The reservoir of refrigerant dehumidifier holds the moisture extracted from the air.

dehumidifier for an RV

Another common unit is desiccant dehumidifier, which is operated by moisture absorption. The substance used in this unit helps reduce the humidity by absorbing water vapors. Note that, mechanical desiccant appliances blow air over the substance, such as bentonite clay or silica gel.

What to look for when buying a dehumidifier for an RV?

Now that you have come across the RV dehumidifiers benefits, you will probably agree that these appliances are an easy and practical solution for reducing excessive moisture levels from the atmosphere. So, are you thinking of buying a dehumidifier for your RV? Yes? Well, good idea!


You can also utilize portable dehumidifiers. With this option, you need only plug in the appliance. These dehumidifiers are effective, affordable, and easy to use. When it comes to portability, you must keep in mind that the dehumidifier you are buying has additional features to keep the comfort level high in your RV.


When buying a dehumidifier for your RV, makes sure to consider the bucket size of the unit before making the purchase. Note that dehumidifiers that consist of larger drip pans and tubs are emptied less often than smaller ones. Appliances with larger tubs are more convenient. If the tub overfills and starts leaking out onto the floor of your RV, you have simply traded one version of water damage for another! Some even run small drain hoses to the outside of the RV and therefore no tub to empty, so maintenance is greatly reduced.

Also of importance to keep in mind is that the more water your dehumidifier can extract and hold (read: more capacity), the more costly it will be. If you are spending more, get a dehumidifier that has front-loading buckets, because these types of dehumidifiers are easy to empty.

Space to Dehumidify

Make sure to choose a dehumidifier that offers automated controls for setting and monitoring the moisture levels in your RV. In your travel trailer, the ideal humidity levels should remain in between 20-50% in winters and 40%-50% in summers.

Dehumidifiers that have hygrometers can measure optimal humidity and show the levels. Some dehumidifiers possess a flexible humidistat option, which allows you to set the desired humidity level so that your dehumidifier maintain the required levels of humidity in your RV.

Noise Level

Keep in mind that noise can create nuisance, especially when you are traveling or staying in your RV. Therefore, it is essential to look for the dehumidifiers that have two-speed fans, which run quietly. These dehumidifiers can also save on energy costs.

Additional Features

When you are buying a dehumidifier, make sure to consider the size of unit you need. Other than this, opt for a unit that can easily function at low temperatures. If the climate you live in is cold, you can buy a dehumidifier with an automatic defrost feature. Moreover, choose the appliance that comes with casters so it can be repositioned anywhere in your RV.

Types of Dehumidifier

As mentioned earlier, a dehumidifier is an electrical device that extracts draws moisture out of the atmosphere to maintain the required levels of humidity in the environment. Generally, there are three types of dehumidifiers: air conditioning, refrigeration, and absorption dehumidifiers.

Air conditioning dehumidifiers

Air-conditioning dehumidifiers indicate you can use an air conditioner as a dehumidifier. You can use a spray-type air conditioner to dehumidify the air in your RV.

Refrigeration dehumidifiers

Refrigeration dehumidifiers use a substance, refrigerant, which extract the humid air and cool it down, condensing out the moisture. The cool, drier air is then expelled out of the dehumidifier.

Absorption dehumidifiers

Absorption dehumidifiers, which are also known as desiccant dehumidifiers, use a substance called desiccant (including silica gel), which absorbs moisture from the air. They work in the same manner as a refrigerant dehumidifier. However, both types of dehumidifiers are ideal to use in low-temperature areas.

Frequently Asked Questions

What size of dehumidifier do I need?

Depends on several factors, most important being the size of area you need to dehumidify.

Does a dehumidifier add heat to the area where it is installed?

Yes, but a relatively small amount.

Are dehumidifiers noisy?

Portable air conditioning units are louder. A dehumidifier may make some noise during the operation.

What is the lowest temperature a dehumidifier can operate in?

Typically around 41-44 degrees Fahrenheit.


Now that you know all the essential details regarding RV dehumidifiers, make sure to keep the points mentioned above in mind. Also, remember to get the appropriate dehumidifier along with the best deep-cycle battery for RV and enjoy your excursion without any inconvenience.

Andrew Wheaton

Hey! I have been fond of the topic of RV for more than 5 years. I have experience in the features of life on wheels. I'm a member of various RV communities and support communication with people who living in RV full time. I hope my articles will be useful to you.

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