Best RV Dehumidifiers 2021: Top Picks, Reviews & Buying Guide

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Shopping for the Best RV Dehumidifier? Fret not, we have you covered!

The life of an RVer is an exciting one, but it comes with its fair share of unpleasant surprises,with excess humidity being the most common and frustrating one.

Daily activities like showering and cooking in an enclosed space can build up moisture, which is not only uncomfortable but can also damage furnishings and promote mold growth inside your precious RV.

This can potentially put both your health as well as your RV’s interior at great risk. You might even have to cut your adventure short if the atmosphere in your motorhome becomes unbearable or you start feeling suffocated!

Luckily, you can keep the moisture at bay by using an RV dehumidifier.

Why Do You Need a Dehumidifier for Your RV?

Contrary to what many think, a dehumidifier in an RV is quite essential. Here’s why:

1. Prevents mold

Condensation, dampness, and moisture damage soft furnishings ruin your clothes and the motorhome’s interior, cause rust, and promote mold growth.

As a result, you might experience headaches, nausea, allergies, and even asthma. Your RV will also have a distinct and unpleasant musty smell.

And while opening your motorhome’s window can make a difference, doing so isn’t always possible, like when it’s raining or during the harsh winter days.

This is where you need a dehumidifier for your RV.

It will keep moisture under control throughout the year and will save you thousands that you’ll have to otherwise spend to replace, maintain, or repair the interior structure of your RV.

2. Keeps your RV’s interior cool

Excess humidity can make the interior of your RV hot, unbearable, and stuffy. You will have to turn up the air conditioner to make it through the humid summer days.

However, an energy-efficient RV dehumidifier can keep the interior comfortable and cool by getting rid of moisture while also helping you save on electricity bills.

3. Ensures fresh air

An RV dehumidifier promises fresh air, so you can stay healthy while on the road and make the most out of your road trip.

Traveling across the country in an RV is a unique experience in itself, and you wouldn’t want to ruin it by being stuck in an RV with humid, musty air.

Our Top 3 Picks

What’s In This Buying Guide

Table of Contents

Picking out the best RV dehumidifier can be tricky because, like almost all RV accessories, the best unit is subjective and depends largely on your specific needs.

For this reason, we’ve reviewed some versatile units and mentioned their specific units, so you can find a suitable option.

To help you further narrow down your options, this buying guide also lists all the crucial factors you need to consider and the two types of RV dehumidifiers for you to choose from.

We’ve also answered some common questions to wind up our discussion on the best RV dehumidifiers.

However, if you’re looking for something that combats dry air, have a look at our picks of the best diffuser humidifiers.

Best Dehumidifiers for RV

COSVII Upgrade Dehumidifier with 68oz Water Tank for 480 Sq.Ft Home
  • Cosvii 68-ounce Small Dehumidifier

  • Best for 480 square feet

  • Airflow capacity
    0.5 cubic meters/second

  • Tank capacity
    68 ounces

  • Moisture removal rate
    23-34 ounces per day

  • Noise
    < 35 dB

  • Energy consumption
    48W/hour

Pro Breeze Electric Dehumidifier
  • Pro Breeze Portable Mini Dehumidifier

  • Best for 215 square feet

  • Airflow capacity
    12 cubic meters/second

  • Tank capacity
    16 ounce

  • Moisture removal rate
    9 ounces per day

  • Noise

  • Energy consumption
    23W/hour

best dehumidifier for rv
  • Lononen Mini Dehumidifier

  • Best for 190 square feet

  • Airflow capacity
    18 cubic meters/second

  • Tank capacity
    27 ounces

  • Moisture removal rate
    350 ml per day

  • Noise
    < 35 dB

  • Energy consumption
    22W/hour

Ivation IVADM45
  • Ivation IVADM45

  • Best for 100 square feet

  • Airflow capacity

  • Tank capacity
    68 ounces

  • Moisture removal rate
    25 ounces per day

  • Noise

  • Energy consumption
    60W

#1

Best for 480 square feet

The Cosvii 68-ounce dehumidifier is small yet highly energy-efficient and effective. It consumes very little energy, making it a good option for your RV. Plus, with its double outlet design, it can extract up to 34 ounces of water daily.

PROS

CONS

Features

Our Review

If you have a large motorhome and want high-efficiency dehumidification, the Cosvii 68-ounce dehumidifier is a good choice. It is a feature-rich model that serves its purpose perfectly.

Its double air outlet with a large air channel design extracts 700-1000ml of water per day and creates a healthy and comfortable environment.

Moreover, the single-button design makes the dehumidifier easy to operate. It also makes less than 35dB of noise, so it won’t disturb you even if you run it throughout the day. In fact, the noise of the RV will drown out the unit’s noise, so you won’t find it disturbing at all.

Its energy-saving capability further makes it a good choice for RVs. It consumes only 48W/hour, which means it only consumes 1.15kW of electricity per day.

Another impressive feature is its auto shut-off function that not only helps save energy but also prevents overflowing. The indicator light turns red as well when the tank is full so that you can empty it in time.

And given its 68-ounce capacity, you won’t have to empty the tank often, making this model convenient for when you’re on the road.

Lastly, it is lightweight and portable, so you can move it around in your RV and place it where moisture is high.

Editor's Rating
4.3/5

#2

Best for 215 square feet

The Pro Breeze portable dehumidifier can remove up to 9 ounces per day and is best for areas up to 215 square feet. Apart from your RV, you can also use it in your closet, garage, kitchen, bedroom, and bathroom.

PROS

CONS

Features

Our Review

The Pro Breeze dehumidifier is a portable and compact device that efficiently reduces humidity in areas up to 2200 cubic feet. It is ideal for use in a garage, trailer, boat, wardrobe, basement, kitchen, and RV.

It has a 16-ounce water tank that can remove 9 ounces of water. Since it is lightweight, you can easily move it to wherever you want to use it. Moreover, it uses advanced Peltier (thermoelectric) technology, which ensures it is energy efficient and works quietly, so you can run it all day long.

It also has an auto shut-off feature that turns the dehumidifier off when the tank is full, and an LED light turns on to indicate that you need to drain the tank.

Dispensing the water from the tank is also easy. Once the tank fills up, just take it out from the dehumidifier, and empty it in a sink. You can also drain it using the water outlet. Once it is empty, place it back, and switch on the dehumidifier again.

We also like how energy-efficient it is. It uses only 23W/hour, which means it consumes just 0.55kW even if you run it for the whole day.

Editor's Rating
4.2/5

#3

Best for 190 square feet

The Lononen mini dehumidifier also works on Peltier technology and removes up to 350ml of moisture per day, making it suitable for areas up to 50-190 square feet. Other noteworthy features include 360-degree dehumidification and an 800ml water tank. 

PROS

CONS

Features

Our Review

The Lononen mini dehumidifier is a multi-purpose and ultra-quiet device that works when humidity is over 50%. It not only dehumidifies but also purifies the air to ensure the air doesn’t make you dry or sticky.

It has a super quiet design and makes less than 35 dB, so it won’t disturb your sleep or annoy you while you’re on the road.

It is also easy to operate with its one-button operation. When you press the on/off button, the button will power up with a blue light.

The Lononen dehumidifier has a 24-hour continuous cycle and a water level controller. Once the tank fills up, the power button light turns yellow, and the dehumidifier automatically shuts off. This not only saves energy but also prevents a mess.

Plus, its compact and lightweight size makes it a good fit for a camper or an RV.

It’s also more efficient than older dehumidifiers and doesn’t use much energy, making it ideal for RVs. This mini dehumidifier uses a fan to pull in air and move it over the refrigerated coils, extract water from it, and direct the water into the tank. This way, it helps save operating costs.   

Editor's Rating
4.7/5

#4

Best Quiet Mini Air Conditioner

The Ivation IVADmM45 also works on Peltier technology and is ideal for removing humidity in tiny spaces like bedrooms, crawlspaces, cars, boats, RVs, closets, and basements.

PROS

CONS

Features

Our Review

The Ivation IVADM45 is a mid-size machine, but it is built around the powerful Peltier technology.

The best thing about Peltier technology is that there are no moving parts, so the unit can be made compact.

Like other RV dehumidifiers on this list, the IVADM45 is also powerful, consumes less energy, has a long lifespan, and can effectively dry up musty rooms.

This dehumidifier is ideal for small spaces of up to 100 square feet and can extract dust and up to 25 ounces of moisture from stagnant areas and spaces with mold and mildew growth.

Whether you use it in a bathroom or your bedroom, it can also remove unpleasant odors and mustiness.

One thing that makes the IVADM45 stand out from other units on the list is the auto-humidistat.

Dehumidifiers that don’t feature a humidistat continue to work even if the relative humidity drops below 20%. However, this is a waste of energy and also damages components like the power adapters.

But with a humidistat, you can set the relative humidity level between 40 and 80%. When the RH becomes more than 5% of the level you set, the dehumidifier turns on automatically.

Similarly, when the RH falls 5% below your set level, the dehumidifier automatically turns off.

Moreover, the removable water reservoir holds up to 2 liters of water, so you won’t have to empty out the tank every day. In fact, you can run it for 2.5 days before the tank fills up.

And once the tank is at its full capacity, the device automatically shuts off. An indicator light turns on to remind you to drain out the tank.

Editor's Rating
4.7/5

RV Dehumidifier Buying Guide

best rv dehumidifiers

What Is an RV Dehumidifier - and how does it work?

An RV dehumidifier works like a regular dehumidifier.

The dehumidifier’s vent draws air from inside the RV and pushes it over cold coils in the dehumidifier. As warm air hits the cold coils, condensation starts to form and drops into a water reservoir or bucket.

After this, the mechanism of the dehumidifier differs according to the type you have.

Basic models that feature a bucket collect the condensation into the bucket that you have to manually empty once it is full.

Some advanced bucket models have an automatic shut-off feature that senses when the bucket is full and shuts off the unit to prevent the bucket from overflowing. Some units also have a window so you can peek in from time to time to keep track of the water level.

On the other hand,, you will have to drain the water using either a hose positioned towards a drain or a pump system with some models. 

What are the Different Types of RV Dehumidifiers?

RV dehumidifiers can be divided into 2 types:

1. Refrigerant

Refrigerant models, as discussed above, work on the cool coil technique and direct the resulting condensation into a water reservoir or a bucket.

They are the ideal option if you want to keep the whole camper dry.

You can use any refrigerant dehumidifier, but you need to make sure it has sufficient capacity. So, if you don’t experience humid conditions often and only need a dehumidifier to remove extra moisture from specific areas, then a refrigerant dehumidifier will be a waste of money.   

2. Decissant

Desiccant or rechargeable dehumidifiers rely on a water-soaking material that extracts the excess moisture.

The greatest advantage of desiccant dehumidifiers is that they don’t need a power source to work. They also don’t demand regular emptying.

Desiccant dehumidifiers are more suitable for closed spaces and targeted dehumidification. So, if there’s a persisting mold problem in a specific space within your RV, go for a desiccant dehumidifier.

However, they cannot remove excess moisture from the whole vehicle.

You might now wonder – which one should you go for?

Well, for this, you first need to determine your budget and camping needs.

For example, if you plan on making a trip to an extremely hot and humid area (think Arizona in the summer) and want to make sure the entire RV stays cool, a refrigerant dehumidifier is the best option.

However, if you opt for a desiccant dehumidifier in such conditions, you will most likely feel suffocated in your rig. A desiccant model won’t be able to meet your motorhome’s dehumidifying needs.    

What to look for in an RV Dehumidifier

dehumidifier for rv

Before settling on an RV dehumidifier, make sure you lookout for the following:

Space to Dehumidify

This is the most crucial aspect to consider when choosing an RV dehumidifier.

Most manufacturers list the space a specific model can cover in cubic feet. So, you first need to measure the space you want to cover and then look for a unit offering that to get the peak performance from your purchase.

Just make sure you don’t buy something extravagant – like a model that can cover 3000 cubic feet to dehumidify around 1500 square feet. This is only a waste of money.

Plus, the larger the model, the more energy it will consume.

Similarly, you don’t want something too small either since it won’t work effectively.

Dehumidifying Capacity

dehumidifier for rv

The dehumidifying capacity of an RV dehumidifier is measured in pints and is a measure of the amount of moisture the device can remove in a day.

Of course, to eliminate excess condensation, you need to look for a model with a suitable dehumidifying capacity.

Here, too, you need to take into account the space you want to dehumidify.

In most cases, an RV dehumidifier with a dehumidifying capacity of 30-50 pints will do just fine, but if your rig’s interior still feels damp, you can opt for a 70-pint dehumidifier.

If your RV has severe moisture issues, you might find it better to first try out a high-capacity dehumidifier before moving on to smaller-capacity models.

However, excessive moisture might be a sign of a bigger problem, so it’s best you get your mechanic or vehicle’s technician to check out your vehicle before purchasing an RV dehumidifier.

When choosing the dehumidifying capacity, you also need to remember that removing water from the air doesn’t mean it is completely gone from your rig.

And the greater the dehumidifying capacity of a unit, the more water it will have at the end of a cycle. 

Emptying large dehumidifiers is a challenge, and they can even become a spill hazard if you leave them unattended for longer periods.

The bottom line is: go for a dehumidifier that closely matches the space you want to cover. 

Portability

As an RVer, you know the importance of space – every inch in the RV is precious, which is why an RV dehumidifier should be small and portable enough to fit in the cabin.

Dehumidifiers should also have clear and unimpeded access to the rig’s interior to work effectively. This means you cannot store the dehumidifier behind upholstery or underneath furniture.

Once again, the ideal size for you will depend on your rig’s size. Go for a smaller model if you have a smaller RV and vice versa. 

Noise Levels

best rv dehumidifier

A dehumidifier makes a bit of noise – like a buzz or hum – that you might find annoying.

While the RV itself is not a silent vehicle, the constant buzz of the dehumidifier might become intolerable after a few days on the road.

Small dehumidifiers typically make less noise, but that’s not always the case.

All in all, before you choose an RV dehumidifier, make sure you know how much noise it makes and how tolerant you are to repetitive sounds.

Power Source and Efficiency

Before buying an RV dehumidifier, consider the amount of energy your vehicle can generate.

When you’re out on the road, power is very limited (and precious) since you depend on the generator in your RV for electricity.

So, running a power-hungry dehumidifier can be a disaster. On the other hand, a dehumidifier with a smaller capacity and power-saving features like automatic shut-off can ensure your model doesn’t drain the RV’s power. 

Maintenance Costs

You don’t really need to spend a lot on maintaining your RV dehumidifier. Simply wipe it down with a damp cloth from time to time, and you’re good to go.

How are RV Dehumidifiers different from Regular Ones

dehumidifier for rv review

The primary function of regular and RV dehumidifiers is the same – to dehumidify a space – but they have certain differences.

While you can use an RV dehumidifier at home, you can’t use a regular one in an RV. This is because special conditions in the rig make a regular dehumidifier an impractical option.

Here’s how RV dehumidifiers differ from regular ones:

Design

There’s constant movement in the RV accompanied by continuous vibrations while you’re on the road.

Although you can find a few regular dehumidifiers with wheels to move them from one place to another, they work best when you set them up in one fixed location.

Moreover, the vibrations produced by an RV in motion can constantly shake up the internal parts, and regular dehumidifiers are not designed to bear that.   

Meanwhile, RV dehumidifiers are portable and compact and designedspecifically for RVs, so you can place them anywhere, and they’ll work perfectly.

Capacity and size

Regular dehumidifiers are larger and have higher capacities than RV models.

However, high capacity in an RV dehumidifier is useless anyway since you only need to get rid of excess moisture from a small area.

Moreover, RV dehumidifiers are compact since space inside a vehicle is limited and precious, while regular dehumidifiers often have a large footprint.

Energy consumption

cool living portable air conditioner

Even Energy Star-certified regular dehumidifiers consume more energy than RV models. 

Energy consumption is a crucial factor to constantly monitor and keep track of when you are continuously out on the road since your RV’s generator needs gas to work.

So, the lower energy consumption of an RV dehumidifier is undoubtedly a great advantage since it can help you save a significant amount of money that you’d otherwise be spending on energy costs.

Limitations

RV dehumidifiers are just as great as any regular dehumidifier; however, there are some limitations you should know.

RV dehumidifiers that use a bucket will shut off when the bucket is full, and they won’t turn on until you empty the bucket. This can be a problem if you’re not around to empty the bucket.

You can also not use an RV dehumidifier if the relative humidity is below 30%.

Using a dehumidifier when the relative humidity is low can increase the chances of flu and cold and irritate the breathing passage and the skin.

It can also damage the interior of the RV.

Finally, you cannot use a dehumidifier if the temperature is low. Running a dehumidifier when it is cold (like below 65 degrees) is a waste of power. Plus, if you run the dehumidifier in the cold, its coils might freeze. 

Frequently Asked Questions

dehumidifier for rvs

Where should I place my RV dehumidifier?

There’s no one correct answer to this question. The ideal place for your RV dehumidifier depends on the layout and size of your rig.

As a rule of thumb, the best place is wherever you spend most of your time in an RV. This will also keep you comfortable while you’re on the road.

Keeping this in mind, you can consider keeping your dehumidifier in the bedroom or the living room.

What is the ideal relative humidity setting for my RV dehumidifier?

The ideal relative humidity setting is a personal preference, but most people suggest keeping the relative humidity between 30 and 50%.

However, you can only set relative humidity if your dehumidifier features a smart humidistat function.

Is it possible to drain a dehumidifier into the RV’s grey water tank?

While it is certainly possible, most dehumidifier brands recommend not doing so.

This is because, along with water, a dehumidifier also extracts bacteria from the air, which can cause problems with your motorhome’s internal tanks.

So, it’s best to drain your dehumidifier on the grass outside the RV.  

Final Verdict: What is the best RV Dehumidifier?

As mentioned earlier as well, the term “best” here is quite subjective and greatly depends on your RV and what you expect from an RV dehumidifier.

But our list is a good place to start your search for the best RV dehumidifier.

We find the Cosvii 69-ounce small dehumidifier is a great option for a large RV, while the Ivation IVADM45 is suitable for a small rig.

If you’re looking for something mid-sized, we would suggest you check out the Pro Breeze Portable Mini Dehumidifier or the Lononen Mini Dehumidifier.

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