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RV Dehumidifier: Do You Really Need It?

parked rv 300How Does a Dehumidifier Protect My RV?

An RV is prone to humidity as it is exposed to outdoor environment for longer time periods. The most common factors that affect the humidity inside an RV include temperature changes, washing, and cooking. These things contribute a great deal in the damage of body of an RV, as damp air in the environment settles on its walls and causes serious damage, which ultimately extends to the entire structure.


As an RV is a valuable investment, it demands our daily attention and care. To maintain the moisture level of an RV so that the exterior and interior of your RV remains safe and stable, you need to install a dehumidifier. This is a device that regulates the moisture levels in the environment to keep the chances of mold or mildew, which can settle on wall of an RV and deteriorate its structure, at bay.


You can use a hygrometer to keep an eye on the humidity levels inside your RV. A hygrometer is an instrument that measures the moisture in the environment. This will keep you updated of any change in humidity levels inside your RV so that you can set your dehumidifier at an optimum level.

The Importance of a Hygrometer

hygrometer 200A hygrometer is an instrument used for measuring humidity in the environment. It also measure relative quantity to indicate absolute and relative humidity. Many hygrometers are simply used to indicate the dryness or dampness in the air. Hygrometers are used to gauge humidity in living areas, storage spaces, laboratories, and fields that are susceptible to excessive humidity. Many hygrometers come with humidifiers and dehumidifiers to maintain the optimum moisture in the air. There are several hygrometers available in the markets that serve in different ways.

How Does a Dehumidifier Work?

A dehumidifier sucks the humidity in the room without changing its temperature. This in turn creates dryness in the surrounding environment, which is important for safety of structure of your space. Optimum moisture levels are also important to ensure good health and keep away the harmful airborne particles and insect-like creatures that thrive on humidity.

What Causes Condensation?

Condensation basically occurs as a result of the formation of water vapors which then seep into the environment as the temperature reaches its zenith. This moisture then settles on the wall and structure of your RV and causes mold and mildew. Ultimately, the walls and interiors of your RV are at the receiving end of the negative effects of excessive humidity.

Why Should I Buy a Dehumidifier?

Mobility ad 250 carry handle 250

A portable dehumidifier will be perfect fit for your RV as you can move it around easily.

Easy to Use

A dehumidifier is user-friendly. It comes with LED lights that indicate you when the bucket is full. Besides, it has controls and buttons that allow you to adjust it according to your comfort level.

Reassurance for Investment

Purchasing a dehumidifier is never a risky investment. The majority of the dehumidifier manufacturing companies ensure customer satisfaction and offer money-back guarantee.

All these features provide good reasons to buy a humidifier for your RV.

How Do I Store My RV?

Symptoms of Humidity

If your RV is suffering from damp floors or excessive condensed windows, then it is time to install a dehumidifier on your RV. Highly humid places are prone to acute termites and pests. Humidity is often a problem in hot areas.

Humans are affected by two common forms of humidity: window condensation 200

  1. Absolute humidity
  2. Relative humidity.

Absolute Humidity:

Absolute humidity is described as the ratio between mass of water vapors and volume of dry air at a specific temperature.

Relative Humidity:

Relative humidity is the ratio of absolute humidity to the maximum humidity.

Extreme humidity is always hazardous for humans. Too high and too low humidity cause serious skin problems to people, especially those who have sensitive skin. Hence storing your RV in a highly humid place should always be done after you have installed a dehumidifier.

How Does Humidity During Day and Night Affect My RV?

During the daytime when the air is hot, the weather is humid as the air condenses more water vapors. On the contrary, the weather gets colder at night which means there is less humidity. But, if you park your vehicle in a storage locality, it will be likely suffer more from moisture because it will be stationary in one spot for a long time. Optimally, the humidity in your RV should be kept under 30%-50%.

Where Should You Place A Dehumidifier In An RV?

A dehumidifier can be placed anywhere in the RV. The only thing you need to take into account is the safety factor. As a dehumidifier contains toxic chemicals, you must ensure that it is placed in a safe place where it is safe from being knocked over.

Is Noise A Factor?

A dehumidifier only makes nominal noise while in operation. Unlike their older versions, they are less noisy today. You can even set the fan speed at an optimum level to further decrease the sound it creates.

Should A Dehumidifier Be Left Running in An RV? And Does Geographical Location Make Any Difference?

A dehumidifier can be left running only for a certain period of time, especially if you are parking it in a storage facility. However, it should be kept in mind that a dehumidifier consumes energy and therefore, would need a power supply and if hooked up to one, should be checked at regular intervals. The best way is set it on automatic mode. In this way, the humidifier will regulate the humidity of your RV at optimum level without having you to check it again and again.

However, the geographical location of the parking does matter here as a normal humid place will require a regular humidifier, whereas an excessively humid place will require a bigger dehumidifier.

ad 250 bucket l 300What Does My Dehumidifier's Tank Do? Where Is It Placed?

The tank in a dehumidifier is used as a reservoir to retain the drained water. Larger dehumidifiers have big and bulky tanks that tend to accommodate maximum amount of water. Usually, the tanks in a dehumidifier are placed in proximity to an area where the water can easily be drained out through a hose pipe.

Electric vs. Non-Electrical Dehumidifiers

There are currently two major types of dehumidifiers that do not require the use of electricity:

  1. Bucket dehumidifier
  2. Reusable dehumidifier

Bucket Dehumidifier:

Bucket dehumidifiers use a bucket to collect water-absorbent crystals. These type of dehumidifiers need to be replaced once the water-bearing crystals are saturated. Typically, they cover a range of 900-1800 cubic feet.

Reusable Dehumidifier:

Reusable Dehumidifier uses silica gel crystals to remove mold or mildew as a result of excessive moisture. You can easily empty the dehumidifier once the unit is fully saturated with water.

Unlike electric dehumidifier, non-electric dehumidifiers require more maintenance, and they occupy more space as well.

What Are the Ideal Locations To Store My RV? What Are the Comparisons?

The most common places to store an RV include gravel area, shelter facility, or garage stores. On the other hand, these spaces also provide ideal place for mold or mildew to nourish due to extreme humid environment. However, garage store is less prone to moisture factor as they are packed spaces and have outlet for air to enter into the RV, while open spaces like gravel areas or concrete parking are more prone to moisture than a garage store.

Where Can I Get A Dehumidifier for My RV?

Right here.

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