Do Dehumidifiers Prevent Mold?


Nobody likes mold. Nobody.

Mold exists in the absence of moisture and continues to replicate as moisture continues to rise. So, your next question may be, do dehumidifiers prevent mold? The simple and short answer is no. But while mold is not destroyed completely by dehumidifiers, dehumidifiers can slow mold from further replicating.


What is a Dehumidifier?

A portable dehumidifier is an affordable solution that protects against  humidity inside the rooms of a house. Usually mounted in naturally damp rooms like the bathroom or kitchen, works like a moisture absorber. Concretely, the device captures the humid air in the room and then sanitizes it by collecting the water in a dedicated tank. This prevents the formation of condensation or mold inside the rooms.

Unlike a moisture absorber, a dehumidifier has a fan  inside to help circulate the air in the room. It is also possible to connect a dehumidifier immediately to a wastewater outlet or a tub via a hose.


How to Choose the Right Dehumidifier to Lessen Mold

Several criteria should be taken into account to pick out the proper dehumidifier for your needs.

  • The surface of the room

Choose the dimensions of the dehumidifier in step with the area of the room where it’s to be used. For example, a large dehumidifier is suitable for the basement or a large room. 

  • The ability of the dehumidifier

Choose your dehumidifier based on the amount of humidity in your room and the size of the room. This is called the capacity of a dehumidifier. It’s important to also take temperature into account. The same dehumidifier will be able to take out less water out of the air of a cool basement than it would in a warmer upstairs bathroom. 

  • The specifics of each piece

Dehumidifiers come in plenty of shapes, sizes, and styles, suitable for all types of spaces. Look for one that will best blend into the character of the room without being too noticeable.


The Technical Features of the Dehumidifier

Dehumidifiers have many features, including:

– An adjustable humidistat: lets you control the humidity level within the room. As soon as the preferred relative humidity setting is reached, the tool switches off automatically.

Automatic defrost: allows the dehumidifier to continue to run at the same time as heated coils are melting the frost inside. This protects the dehumidifier from breaking down. 

Automatic shutdown: This allows the dehumidifier to turn off automatically when a certain humidity level is reached or once the tank is full to protect it from overflowing.

Using a dehumidifier is usually recommended in:

– A generally poorly ventilated and poorly heated area in a home.

– A room that is hard to ventilate is usually the laundry room, basement, or bathroom.

– A kitchen without a hood.


When to Use a Dehumidifier

Dehumidifiers need to be used in a room that smells of mold or has high humidity. When the air in a room is just too humid, the walls are moist to the touch and have mold stains.

A dehumidifier is also recommended to make an interior comfier to live in for those  affected by allergies, asthma, or colds.

The use of a dehumidifier is most often used in the summer season, in addition to the air conditioning. Because humidity is more difficult to reduce at cooler temperatures, we recommend specific steps to take during the winter season.


Installing and Caring For a Dehumidifier

Most people will install a portable dehumidifier on the floor, but you’ll need to make certain that there is sufficient space around it so the air can circulate freely. Some dehumidifiers can also be incorporated into the air conditioning of a home.

If you use a hose to empty the tank of your dehumidifier, check that it reaches to its exiting drain or opening without creating any obstacles. Also, make certain to locate the hose away from electric outlets to keep away from electrocution.


How to Decide On a Dehumidifier

Before deciding on the capacity of a dehumidifier before you buy it, you’ll have to know the size of the room and what kind of humidity and temperature levels you’re starting from. 

To measure the humidity level in a room, use a hygrometer. The perfect relative humidity stage in indoor air is between 45% and 50%. Beyond that, the air will become conducive to the development of molds, especially once it exceeds 70% in relative humidity.

The effectiveness of a dehumidifier relies on the scale of the room, so make sure you know the square footage of the area, also taking ceiling height into account.


Components of a Dehumidifier That Must Be Cared For


The dehumidifier’s tank reservoir must be emptied regularly. Always unplug the appliance before doing this. Then take out the water tank and rinse with mild detergent. If yours has a hose rather than a tank, regularly check it for leaks and damage.



Coils must be checked regularly for damage and rust. Remember, faulty coils can freeze the unit, essentially rendering it useless.


Air Filter

The air filter of a dehumidifier ought to be checked every few months, depending on usage and manufacturer’s instructions. You may have to wash or replace the filter.


Dehumidifiers We Recommend

For those suffering from allergies or asthma, a dehumidifier is a must. Here are a few recommendations that may work for you.


Colzer 9.5 to 70 Pint Dehumidifiers

If your home has a mold problem, chances are, it’s in your basement. This means that you need a dehumidifier that can take care of itself. One that will constantly drain water through a hose without having to empty it, one that auto-shuts off when the coils freeze over or auto-restarts when there is a power outage.

With its capacity ranging from 9.5 to 70 pints, the Colzer line of dehumidifiers is made for entire basement floors ranging from 1,000 to 4,500 square feet.


Afloia Dehumidifier with HEPA Filter

We really like the double functionality of the Afloia dehumidifier. Its capacity is on the smaller side, so it probably works better in smaller rooms like bathrooms and closets instead of entire basements.

So why did we choose it?

It not only acts as dehumidifier to remove moisture, but it also acts as an air purifier to clean the air with a HEPA filter. While a HEPA filter itself is too course to catch mold, it can remove dust and organic matter that mold needs to feed off on. Cut the food source off, and mold has a lesser chance of surviving.

More about HEPA filters and what particles they catch in this post.


Some Additional Tips to Get Rid of Mold

Mold is relentless, and so should you be as well to get rid of it. It will take a lot more than just a casually placed dehumidifier to rid a home of mold. Here are some additional steps to take if your mold problem is still small enough to take care of on your own without any professional remediation.


  • Use of White vinegar to prevent mold

Dilute 300ml of vinegar with 200ml of water in a spray bottle, then spray directly on the mold spots. Leave for a few hours. You may have to repeat this a few times since mold can easily replicate.

  • Lemon for grout

Do you have mold growing on the grout between the tiles in your bathroom? Lemon is a natural trick that can remove mold naturally.

Mix cleaning soap with lemon juice and scrub the joints with a toothbrush soaked in this mixture. Leave it on for some hours to properly eliminate the mold and mildew. Rinse thoroughly.


Related Questions

Are molds dangerous to our health?

Harmless-looking damp stains on our walls and floors can release spores that are very harmful to the lungs. Left untreated, mold is potentially responsible for allergies, respiratory illnesses, lung infections, asthma, and coughs.

How do you know if a mold is toxic?

The possible symptoms of exposure to molds can vary from person to person. Some of the most common complaints include allergies, asthma, irritation of the nose, eyes and/or skin, discharge from the nose, etc.