Best Dehumidifier for your RV or Camper

Do you know what the number one that will absolutely destroy the inside of your RV? Mold and Mildew! And not only will it damage your RV or camper, it will make your family sick. But a good dehumidifier will quickly reduce and maintain a healthy level of humidity in the air creating a healthy environment for your family.

RV Dehumidifiers - Eliminate Moisture in RV
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Protect your RV interior using a Dehumidifier

Always On Liberty - Dehumidifier for Condensation

Why your RV needs a dehumidifier

Humidity, condensation and moisture have potential of damaging your fifth wheel’s, travel trailer’s or motorhome’s interior. All of which could create unwanted structural issues as well as put you, your family and pets health at serious risk.
When you live or camp in humid climates, they are perfect breeding grounds for dust mites, mold, fungus and even mushrooms. And the awful odor will be more than you can stand. They can trigger allergies, asthma and other serious health problems. There is no denying that a dehumidifier is the most effective way to cleanse the air of potentially harmful substances making you feel comfortable in your RV.
RV’s and Campers are not airtight. Whether it be a small cracked window seal, air gaps around plumbing pipes or slide outs with deficient seals, there are small access points that invite air exchange and moisture.
Cooking presents moisture issues through emission of steam. Just the presence of water from doing dishes or running water that evaporates. And in the bathroom, whether brushing your teeth, washing your hands or taking a hot shower puts moisture in the air.
Even humans and pets expel water droplets into the air. All of this in such small confines of a camper or RV sets the perfect atmosphere to grow things by literally creating its own greenhouse effect. Mushrooms anyone?

Always On Liberty - Dehumidifier for Condensation Window Moisture

How to mitigate moisture issues and humidity in your RV or Camper?

As we talked about the many ways of how to stop condensation in your RV, one way to eliminate moisture in your RV is to get a small dehumidifier (or two).

Old Dehumidifier

However, when we think of dehumidifiers, we think of those big, heavy clunky things our parents had in their basements. But, those are way too heavy, cumbersome, and a bit of over-kill for campers and RV’s. Seriously, all you need is a smaller dehumidifier or two based on the square footage of your RV’s interior.

How dehumidifiers work

Small electric dehumidifiers use Peltier Technology (no compressor) which makes them super lightweight and quiet. They are also exceptionally energy efficient. Small portable dehumidifiers are the perfect solution for extracting moisture in RV bathrooms and kitchens.


The unit draws humid air in and heats it over a warm plate inside the dehumidifier, then cools the air causing condensation which is trapped in the removable, spill-proof reservoir. Dry air is then expelled out.

These powerful little dehumidifiers have automatic shut off when the water reservoir is full. When this occurs the indicator light will alert you when the reservoir needs to be emptied. They hold up to 20 oz. of collected water, depending on which model you get.


These little dehumidifying powerhouses have a lot of other benefits that can help you in humid spaces as well.
      • It will help to reduce mold, mildew and fungus from developing on your clothes, furniture and other fabrics.
      • Your breads, boxed cereals and crackers will stay fresher, and last longer.
      • You won’t find signs of rust on electronics or metal on your RV components.
      • No more moldy walls or damaged wood in your RV or camper.

Also, these small dehumidifiers are the perfect answer to eliminating moisture in your RV’s basement storage compartments. Just put one inside, plug it in, turn it on and close the cargo hatch. The next morning, you’ll notice it will feel dryer. Your tools, house batteries and everything you store in it will thank you.

Our two favorite dehumidifiers

We have to favorite portable dehumidifiers for our RV fifth wheel – The EVA-DRY ‘Petite’ Dehumidifier and Eva-Dry “Mid-Size” Dehumidifier

EVA-DRY ‘Petite’ Dehumidifier 

Dehumidifiers - Eva Dry Petite

This petite dehumidifier has whisper technology has a 9V 2.5A electric input. It has an on/off switch with a power indicator light. As well, it has an indicator light to alert users when it needs emptying.

It has a manufacturer specified power draw of 22 watts. That makes it low on energy consumption so you can save on your electricity bill and also helps the environment. The water reservoir capacity is 16 ounces.

The average noise output is measured at 50.9 dB, 2.3 dB below average; making it generate less noise to provide us a peaceful night sleep at night.

We use this little guy in our fifth wheel on one of our the bedroom’s CPAP shelves or on the bedroom vanity counter. We also use it in our clothes closet to help prevent any moisture that may cause mold and mildew on our clothes and shoes. It takes up very little space. The Eva Dry Petite dehumidifier is about the size of a shoebox. It’s very lightweight and portable.

Eva-Dry “Mid-Size” Dehumidifier

Eva Dry Mid Size RV Dehumidifier

This “mid-size” portable dehumidifier is a tad bit larger than the Petite and packs a little more extraction power for larger spaces. 

The Mid-Size Dehumidifier, also with Peltier technology, is just as light and quiet as the Petite. The only difference we can tell is that it works well in areas up to 2200 cubic feet. And it absorbs 20.5 ounces of moisture in a 24 hour period with relative humidity of 80% at 86 degrees Fahrenheit. It has an amperage rating of 6 amps and wattage rating of 72 watts, and Voltage Rating of 110 volts.
We use this bigger (but still tiny) dehumidifier in our fifth wheel’s main living space and our RV kitchen. It only needs emptying under moderate to heavy humidity about every three days.

Closing thoughts

 In a nutshell, we love these!  They do exactly what they’re supposed to do.  The $150 we spent for both of them was money well spent considering what the result could be if we didn’t have them.  Seriously, we can tell that they are working because they are so quiet.

So, if you’re in the market of purchasing an RV, Camper or even a boat, put these on your shopping list of must haves.  The small amount of money paid now for these dehumidifiers will be a huge amount of money saved later in mold and mildew induced repairs.  Look at these as protecting your investment.

We highly recommend the Eva Dry dehumidifier.  There are other brands out there however, we’ve found the Eva Dry dehumidifiers work best for RVs, campers and small spaces because of their size and portability.

Related articles

How to Stop Condensation in Your RV

Stinky Motorhome or Camper? How to Eliminate Odors in Your RV

RV Maintenance: RV Air Conditioner Cleaning and Maintenance

RV Maintenance: Plumbing and Drains


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9 Replies to “Best Dehumidifier for your RV or Camper”

  1. This is very timely advice as we are victims of "unexpected" leaking during recent deluge of rain (who really expects trouble?). Thanks so much for your review. I'm subscribing to your blog.

  2. i bought one love it works great one question is ti normal for the air coming out to be very warm? ty

    1. Robbie, thank you for reading! I’m not sure. Make certain you check the manufacturer’s manual and/or their website. -Dan & Lisa

  3. Absolutely love my dehumidifier. It’s a different brand, but the same size as the larger one, mentioned. Even with the a/c running, I have to dump it once a week. I also use the refillable damp rid containers, and the nonrefillable ones from the Dollar Tree. They work great in closets and other small areas.

    1. Rebecca, we love ours too! And yes, we have Damp Rids in the closets and some drawers. We even have one in the cargo bay to keep tools and important stuff from rusting. Thank you for visiting our blog. Please come back soon! -Dan & Lisa

  4. I have the 2nd one you listed. I have a tiny teardrop…. this summer it has rained ALOT…so the camper felt damp… this dehumidifier did the trick. I had to empty it twice on a 5 day trip..
    Worth the money.

    1. Pam, those dehumidifiers ROCK, don’t they? We love ours; especially in the more tropical, humid and damp zones. How do you like your little teardrop trailer? We are enamored with them! Please travel safe and enjoy your journeys! -Dan & Lisa

  5. I have a Solace Deluxe Motorcycle Camping Trailer 23 cu ft behind my 107 cu in Harley I just got and am very happy the small dehumidifiers is all I need I hope I will find out Thank You

    1. Gary, Wow!! We’re envious that you are traveling with your Harley. That’s what we started out with; a Softail Fatboy and Softail Heritage Classic when we had our Cyclone Toyhauler. However, as full-timers, we had to re-evaluate our travels and expectations as motorcycle and RV nomads.

      We are glad that our suggestion of the dehumidifiers will work for you. We love ours! Small but mighty. Ours work great. We love their portability and price.

      Be safe on the road and keep the rubber side down. Ride safe! -Dan & Lisa

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