10 Best Small Mini Marine Boat Dehumidifiers for Damp Review


Posted by
Ryan Peters
Updated by
Bill Miller
Last updated:
January 1, 2021

Allergies and air irritants can be made even worse by high levels of humidity. A dehumidifier works to reduce moisture inside for a more comfortable feel by removing the sticky feel in the air. It works by drawing warm air currents into its coils via a fan. Cooler, drier air is then released back through the other side of the machine. A drier atmosphere leads to better health and protects your boat cabin from mold and mildew development. The air quality is also improved as lessened humidity hinders dust mite growth and rids boats of musty odors. Marine boat dehumidifier should be able to bring the moisture in the air down to a relative humidity of 30 to 50 percent.

Most Reliable Dehumidifiers for Boats — Top Rated 2021

Editor's pickEditor's pick

12V Marine Boat Cabin Dehumidifier [Homelabs]

Why it's better?

Excellent quality. Reduces moisture through its built-in pump compressor; removes up to 35 pints of water from the air per day. Adjust to your ideal moisture setting, then let it run its continuous 24-hour cycle until the tank is full. Convenient built-in wheels and handles, and a quiet fan.

TOP Boat Dehumidifiers Comparison Chart

1. The Best 12V Marine Boat Cabin Dehumidifier [Homelabs]

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  • Quality
    95%
  • Features
    95%
Last Updated January 17, 2021

2. The Best Boat Dehumidifier, Compact Quiet, for Small Area [Ivation]

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  • Quality
    90%
  • Features
    95%
Last Updated January 17, 2021

3. The Best Mini/Compact Portable Electric Boat Dehumidifier [Pro Breeze]

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  • Quality
    85%
  • Features
    90%
Last Updated January 17, 2021

4. The Best Ultra Quiet Small Marine Boat Cabin Dehumidifier [Honati]

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  • Quality
    90%
  • Features
    90%
Last Updated January 17, 2021

5. The Best Electric Portable Small/Mini Dehumidifier with Timer & Humidistat [Lonove]

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  • Quality
    85%
  • Features
    85%
Last Updated January 17, 2021

6. The Best Marine Boat Dehumidifier with Air Purifier for Boat Cabin or Home [AlorAir]

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  • Quality
    80%
  • Features
    85%
Last Updated January 17, 2021

7. The Best Marine Boat Dehumidifier for Damp with Heater [Meaco]

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  • Quality
    80%
  • Features
    80%
Last Updated January 17, 2021

8. The Best Electric Marine Boat Dehumidifier for Damp [Afloia]

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  • Quality
    85%
  • Features
    80%
Last Updated January 17, 2021

9. The Best Small Battery (Non-Electric) Portable/Compact Quiet Boat Dehumidifier for Damp [Seavon]

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  • Quality
    80%
  • Features
    80%
Last Updated January 17, 2021

10. The Best Quiet Portable Dehumidifier for Boat [Tosot]

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  • Quality
    80%
  • Features
    80%
Last Updated January 17, 2021

Choose a Model of Dehumidifiers for Boats:

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Criteria Used for Evaluation. Boat Dehumidifiers Pros and Cons

Overall, there are the most important things to consider when purchasing best marine boat dehumidifiers for damp. Pay attention to the following unique features:
  • product's quality;
  • price;
  • etc.
Dehumidifiers remove humidity from the air reducing the potential for dust mites, mildew and mold. Wondering which ones right for you?

’s Capacity

First , think of it the size of your space and the capacity you'll need. Dehumidifiers are rated by the number of pints of moisture they can remove in 24 hours. A small unit works great for a smaller room with lower level humidity, larger models are best for basements and high humidity environments, especially if wet carpet, wallpaper or musty smells are present.

Boat Dehumidifier’s Placement

Next, think about placement. Units typically take up a square foot of floor space. keep the filter clean and vents clear with at least 12 inches of circulation space. Also consider noise level if you plan to run the unit in common areas.

Built-In Features of Marine Boat Dehumidifier

Finally consider the built-in features. If you plan to be away frequently choose a model with a timer and an auto restart in case of power failure. If you plan on moving the unit around choose rolling casters. Dehumidifiers use nearly 30% less energy than non certified units. They make us more initially but make up for it in energy savings over time. Most models have an indicator showing when the bucket is full. To avoid emptying the tank manually choose a model with an external hose connector. Some models advance this idea with an added internal pump, that automatically pumps water upward up to 16 feet out a window or into a utility sink or drain. With capacity, placement and features in mind you'll be breathing easy in no time.

What Size Dehumidifier Do I Need?

When you're choosing a boat dehumidifier, the first question you should ask yourself is, what size do I need? To figure this out, you'll need to know two things - the square footage of the room you want to dehumidify and how humid it is. You can measure the relative humidity of the room using a hygrometer or just use your best judgment. Then use special chart and just match the square footage of your space with its humidity level to find the pint capacity that's most appropriate for your space. Depending on a few details about your space, like where it's located and what's inside, you may need to increase your recommended size by 5 or 10 pints. Once you know what pint size to look for, here's something to keep in mind. If you're going to be using your dehumidifier in a really damp, tough environment, look for one with your recommended pint size measured at AHAM, not saturation. This means you'll have a better idea of how it will perform in average conditions, like 60% humidity. So a unit that removes 70 pints at AHAM is more powerful than one that can remove 70 pints at saturation. And if you're stuck, play it safe and go with a higher capacity.

3 rules to Avoid Condensation in small living spaces

When living in a small space like a boat, moisture and condensation can be real issues. The best way to avoid condensation is using marine boat dehumidifier. But I'm going to show you how to avoid condensation and how to keep your boat cabin dry. Last winter I lived in a small sailboat and a year before that I lived the whole winter in a small cabin without any heating. And when I was doing these things I had some serious issues with condensation and moisture. To get all this moisture out is pretty tough. So I waked up in the morning with lots of drops on the ceiling dripping down on my beds, and with the blankets completely soaked from condensation. So in the beginning I wasn't sure how to deal with this and I started experimenting with keeping the moisture out. Warm air can hold more moisture than cold air and if warm air is moisture in its meats a cooler area or a cold surface, the water in the air will condensates and turn into drops. In a small living space the air contains a relatively large amount of moisture. And this is coming both from your body, from cooking and from other sources. And if the space is badly insulated or if it's not ventilated as well, then the moisture can start to condensate and cause issues like rusts and molds. The best way to avoid condensation is by letting the warm moist air cool down outside of the space. So this means there should be no cold surfaces inside and the warm air should be ventilated out, so it can cool down outside. And this is where insulation comes in but you have to do it the right way. For example, when the warm moist air from the body moves through the army sleeping bag, it's going to meet colder air on the outside and like the outer layers of the sleeping bag. And that's where condensation is going to happen. So in the morning you can notice your sleeping bag getting wet on the outside from condensation. And the issue here is that the tent is not insulated, so the air inside of the tent is much colder than the air inside of your sleeping bag. So when the warm moist air meets the cold air from outside there will be condensation. Now imagine you were sleeping inside of a trash bag and inside the sleeping bag. The trash bag would trap all the moisture inside of the sleeping bag, where the air is warm, and there will be no condensation happening in the bag itself. But of course this would be very uncomfortable and we'd get very moist in the end, so you would wake up being wet on your body. So the real solution here would be to insulate the walls of the tent instead. And by insulating the walls of the tent you have no big temperature difference in the sleeping bag itself, so there won't be any condensation. And then of course you would have to ventilate the moist and warm air out and let it cool down outsides. Keep in mind that you need to have a waterproof layer between the warm and moist air and the installation, otherwise the moisture is going to condensate inside of the insulation and you definitely don't want that to happen. One thing I should mention is if you don't have good insulation or don't have insulation at all you can still avoid condensation. What you have to do then is to continuously heat your cabin using a boat heater a little bit at least and have really good ventilation. This is what I did when I lived on the boats and it worked pretty well. So in conclusion here are the three rules of avoiding condensation. Number one - the warm and moist air must be ventilated out and cool down outside of the living space. Number two - there must be no cold bridges or cold surfaces in sites where there's a big difference in temperature. And number three - there must be a waterproof layer between the warm and moist air and the insulation. If you have any tips or experiences with condensation please share with us down in the comments.

Best Branded Boat Dehumidifiers

The market is dominated by some manufacturers such as: Homelabs, Ivation, Pro Breeze, Honati, Lonove, AlorAir, Meaco, Afloia, Seavon, Tosot.

How to use a dehumidifier to cool a space

Although dehumidifier is primarily designed to remove moisture, it can also be a useful tool for dealing with hot weather climates. Heat can cause all kinds of discomfort during the day and at night. Rather than trying to run the fan more often or at a higher speed, you can run a dehumidifier to remove moisture. Dehumidifiers dry out the air in the room, therefore, reducing moisture that supports heat, and makes the room more comfortable.

Also know that a dehumidifier does not reduce temperature directly, it creates a completely dry atmosphere that is cool and gives a comfortable feeling. In this state, you can then turn on other temperature control appliances like an air conditioning unit, to actually reduce its temperature.

What exactly does a dehumidifier do?

A dehumidifier is a device that removes moisture from the air, therefore reducing its relative humidity. It is used in high humid and hot climates when moisture tends to rise beyond safe levels.

By running a dehumidifier, you can keep humidity under control by maintaining it in a safe range. However, be careful not to over dehumidify, which causes moisture to fall too low and is not safe for you.

Can you use a dehumidifier instead of an air conditioner

No, a dehumidifier cannot be used instead of an air conditioner. They are two separate devices which cannot be used interchangeably; a dehumidifier extracts moisture from the air, while an air conditioner cools the air in the room.

An air conditioner also dehumidifies the air in a room during the process of cooling (passing it through chilled pipes), but a dehumidifier does not reduce the temperature of the air while dehumidifying.

So, how does a dehumidifier cool a room

A dehumidifier could be used intelligently to cool a room; therefore, it all depends on how you use it. When the amount of humidity in the air is high, the air feels warmer than what it actually is, while dry air, on the other hand, always feels cooler. Therefore, using a dehumidifier to cool a room would help you feel cooler, although it does not directly affect temperature.

Also, sweat from the air tends to evaporate a lot from the skin and settles in the air when the atmosphere is hot. This causes the air to be moister. Over time, you would start to feel clammy, especially the skin, because you can’t stay dry due to sweat not evaporating any more. This is because the air is saturated and cannot hold any more moisture. Hope you get the picture?

In such a situation, running a dehumidifier reduces moisture in the air, and keeps your body cool because sweat would easily evaporate better.

How does a dehumidifier work?

A dehumidifier draws in air from the atmosphere and passes it through refrigerated coils. During the flow, condensation occurs, and moisture is directly extracted from the air in the form of water droplets.

The water is collected in a tank or directly drained to a location, while the moisture free and dry air is released back into the atmosphere. After a while of continuous moisture extraction, the level of relative humidity in the atmosphere drops.

There are also low-grade dehumidifiers that simply expose moisture-absorbing beads to the atmosphere, which in turn absorbs moisture directly. These types are cheaper and smaller, but also way less effective. They are mostly suitable for small closed spaces like cupboards and wardrobes.

Requirements for a dehumidifier to cool a room

The first requirement for a dehumidifier to be able to cool a room is that it can actually dehumidify it. Finding the right type of dehumidifier is very important because a suitable capacity would be able to dehumidify the air properly. Dehumidifiers are rated on room size in square feet, and you must purchase a unit that adequately matches that of your room.

You should also consider the temperature of the environment. Some dehumidifiers cannot run in low temperatures, while others can. On average, most dehumidifiers work best in temperatures from 70 degrees Fahrenheit and higher. The low temperature could cause the coils of the dehumidifier to freeze up, therefore blocking the passage of air.

To counteract this, many new dehumidifiers come with an inbuilt anti-freeze system. If you live in very cold areas, your unit should certainly have this. Also, you cannot cool a room that is already cold.

How to make a dehumidifier cool your room – DIY

Here are easy steps on how to make a dehumidifier cool your room:

  1. Ensure the room is properly insulated from the external environment. This should be done for the dehumidifier to have the most impact possible on your room’s air, and it includes closing all doors and windows.
  2. Purchase a sufficient capacity dehumidifier and set it up, preferably in the middle of your room, if possible. This should be done preferably at a time where you do not have to use the room, and also ensure you follow all manufacturer’s recommendations on how to use and position the dehumidifier.
  3. Run the dehumidifier, preferably in your absence, because it is a drying agent and can cause the skin to dry up. Dehumidifiers shut off as soon as the tank gets full, or you can instead use a continuous drain option to avoid the stress of emptying its tank frequently.
  4. Note that the dehumidifier should reduce humidity to a safe level, and do not allow it to reduce relative humidity too low.


A dehumidifier can be smartly used to cool a room because it is a drying agent. Although it does not reduce temperature directly, it creates less humid air that surely cools the body. You can easily use a dehumidifier to navigate your heat problems, although you should also keep in mind that it does not and cannot function like an air conditioner that actually cools the air.

With the right size and application of a dehumidifier, you can get a cooler feel in your room today.
Let's go over some frequently asked questions about Boat Dehumidifiers.

Q: Is dehumidifier expensive to run

A: Let's take a standard model that operates at 280 Watts-hour. If the current power rate is 15 cents/kW, an electric dehumidifier uses 4.2 cents of power per hour. Therefore, if you run it for 10 hours a day, the cost is 10 hours * 4.2 cents = 42 cents/day or about $153.30 per year.

Q: Are dehumidifiers safe

A: Dehumidifiers can create a healthier environment By eliminating mold and dust, you're also eliminating invaders like silverfish, cockroaches, and spiders. Lower humidity levels may also benefit people who have COPD.

Q: Is dehumidifier worth it

A: Dehumidifiers reduce humidity levels, making your space less hospitable to allergens such as dust mites, mold, and mildew. Running a dehumidifier helps reduce dust, so you won't have to clean as often. A dehumidifier also lowers energy costs because it helps your air conditioner run more efficiently.

Q: Are dehumidifiers noisy

A: Although noise is a very subjective topic, the average dehumidifier is typically not as loud as a window or portable air conditioning unit. ... As a frame of reference, the average dehumidifier is rated around 55-60 dB, or about the same as human speech.

Q: When dehumidifier ice up

A: The most common cause of frost and ice buildup on a dehumidifier is because the unit is operating in temperatures that are too cold. Many dehumidifiers are not equipped to run at temperatures below 65 degrees Fahrenheit. There are some models made for cooler basements that operate down to temperatures of 36 degrees.

Q: Why dehumidifier blows hot air

A: Warm or hot air coming from under or behind the dehumidifier is normal and part of the dehumidification process as long as the unit is drawing moisture from the air. When the unit is dehumidifying, the compressor is generating heat as it operates.

Q: Why dehumidifier not collecting water

A: If your dehumidifier is no longer pulling water from the air and you have verified that the ambient room temperature is above 65 degrees Fahrenheit, then the unit's compressor may not be running. The compressor is the pump that circulates the refrigerant through the evaporator to extract moisture from the air.

Q: Will dehumidifier dry out damp walls

A: A dehumidifier extracts excess moisture from the air by sucking it in. Thereafter, it releases dry, warm air that is devoid of moisture. As a result, it helps to balance humidity level in your space. So, while it can help dry damp walls, it is necessary to tackle the actual cause of the damp.

Q: Will dehumidifier kill mold

A: Removing all mold spores is nearly impossible. Mold stays “dormant” in the air or on surfaces even when there's no excess moisture to help it grow. So, to answer this question, dehumidifiers do not kill mold, but they do prevent it by reducing humidity.

Q: Will dehumidifier help with damp

A: A dehumidifier will get rid of some types of damp. However, they are only designed to help with condensation. If the damp is not being caused by condensation, then a dehumidifier might not be the best solution. Condensation happens when the moisture in the air contacts a cold surface.

Q: Will dehumidifier kill plants

A: Artificial environments aren't strictly conducive to the well-being of house plants. However, even those with high humidity levels that regularly use a dehumidifier, won't kill their plants – providing they're the right plants; cared for, watered, and shown some indirect sunlight from time to time.

Q: Will dehumidifier make room warmer

A: Dehumidifiers work much the same way as air conditioners, however unlike air conditioners, a dehumidifier does not cool the air. Instead, when the compressor inside a dehumidifier is working, it dries the air and releases it back into the room as heated air.

Q: Will dehumidifier get rid of smell

A: Dehumidifiers help reduce odors that can accompany mold and mildew - getting rid of that “musty” or “rotting” smell. Running a dehumidifier helps reduce dust, so you won't have to clean as often.

Q: Who invented dehumidifier

A: The first dehumidifier was created by American inventor Willis Carrier in 1902 to dehumidify a Brooklyn printing plant. Carrier cited the discovery as later motivating further discoveries in air conditioning.

Q: Where to place dehumidifier

A: The best place for a dehumidifier is the room you need it in most. Dehumidifiers are commonly placed in bedrooms, basements, laundry rooms, crawl spaces, indoor pools, boat cabins since these areas often have moisture problems.

Q: What does a dehumidifier do and where does the water come from

A: The warm air contracts as it's fed through the refrigerated coils of the machine, and condensation is left inside the dehumidifier. As this condensation collects, one droplet of water at a time, it falls into a storage tank attached to the dehumidifier.

Q: Can dehumidifier cause sore throat

A: Environmental allergens can cause symptoms like: wheezing; sneezing; chest pain; eye irritation. Dehumidifiers help reduce allergy symptoms.

Q: Can dehumidifier cool room?

A: Dehumidifiers can cool a room because it greatly reduces humidity which is the main cause of discomfort in a room. Humidity is that heavy muggy feeling you feel due to excess water vapor in the air. Dehumidifiers can air conditioners because all the air that is left will be dry and left to cool.

Q: Can dehumidifier dry clothes

A: Using a dehumidifier may actually dry your clothes faster than when using a clothes dryer. In fact, you can speed up the drying time by setting your dehumidifier to mode to increases drying efficiency and speeds up the process.

Q: Can dehumidifier cause cough or headaches

A: People with eczema (atopic dermatitis) may be especially prone to flare-ups in a dry environment. When you use a dehumidifier, you might need to be especially mindful of staying hydrated. If you have a dry cough or stuffy nose, running a dehumidifier might do more harm than good, too. A brand new humidifier shouldn't cause you to have a headache. If the humidity is too low– say around 10-18% –then your humidifier can actually help soften and unclog your sinuses. If the humidifier runs too high or for too long, the high humidity cause headaches.

Q: What dehumidifier uses the least electricity

A: Most Energy Efficient Dehumidifiers Danby 70-Pint Dehumidifier, Ivation 70 Pint Dehumidifier, Haier 30 Pint Dehumidifier, Frigidaire FAD504DWD 50-pint Dehumidifier.

Q: Can dehumidifier work without electricity

A: If one can't afford a costly electric dehumidifier, they can bring a very efficient no-electric dehumidifier and enjoy its benefits. It has no repair costs and produces no noise at all. You can use it anywhere around the house to tackle humidity problems.

Q: What are good marine boat dehumidifiers for damp

A: Check please our best marine boat dehumidifiers for damp comparison table.

Q: Where to buy cheap Boat Dehumidifiers for sale

A: Take a look at this TOP best marine boat dehumidifiers for damp kits reviewed of 2021 and then press the «Check Price» button to check their price and availability.

Q: What is the best Dehumidifiers for Boats for money

A: The 12V Marine Boat Cabin Dehumidifier [Homelabs] is our Editor's Choice as the best model of Dehumidifiers for Boats with its combination of performance, features, quality and price.

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