Where should a dehumidifier be placed in a finished basement
David Ramirez
Published Apr 21, 2026
In conclusion, the best place to keep a dehumidifier most definitely is the downstairs basement or upstairs close to the stairs. This is because the basement is the most humid place in your house. If there is any other moist condition upstairs, its source must be resolved rather than placing a dehumidifier.
Where should dehumidifier be located?
Generally, places where you find moisture are the best places to put a dehumidifier. Spaces such as bathrooms, basements, kitchens, and crawl spaces are all locations where excess moisture can be present.
What floor should a dehumidifier be on?
As far as temperature and moisture content in the air goes, place the dehumidifier in the floor that is coldest (or filled with cold air), and the floor with the highest humidity content and moist air.
Do you need a dehumidifier in a finished basement?
The most important step to take in your finished basement is to dehumidify. High humidity is a key factor in mold growth, so if your basement is extremely humid you may want to consider installing a dehumidifier.When should you use a dehumidifier in the basement?
For now, we leave you with this simple one: use a dehumidifier during the spring, summer and early fall to keep moisture at bay, but unplug and stow it away during the winter to prevent damage to your unit.
Do you put a humidifier or dehumidifier in basement?
Basements are usually wet and are mostly the source of high humidity in any home with a basement. If the moisture level is left uncontrolled, it can lead to mold and mildew growth. So, in that regard, what you need is a dehumidifier to remove the moisture and not a humidifier that will worsen the condition.
What should basement humidity be?
Normal Basement Humidity Levels When your basement is too humid, you’ll probably be able to feel it. A comfortable basement should maintain a humidity level of 30 to 50 percent — however, those may differ depending on your climate.
Does finishing a basement reduce humidity?
Method 3 of 3: The third way that moisture can get into your basement is through condensation. Closing basement windows when the relative humidity outside is over 50 or 60 percent will prevent humid air from entering your house, and prevent condensation from forming.Are basement dehumidifiers worth it?
Moisture Challenges in Basements Moisture issues in basements cause mold to grow, causing health issues and structural damage to the home. … Using a basement dehumidifier to keep humidity levels below 50 percent can prevent mold and mildew growth, protecting indoor air quality and preventing damage.
Should you run a dehumidifier all the time?Should a Dehumidifier Run Constantly? No, there is no need to keep the dehumidifier running constantly. It’s generally enough to run the unit when the humidity level is 50% or higher. A good rule of thumb to remember is to maintain a comfortable 30-50% humidity level for most homes.
Article first time published onWhat should basement dehumidifier be set at in summer?
The ideal relative humidity level should be somewhere between 30% – 50%. Many basements in warm humid climates need dehumidification during the summer months to keep mold growth at bay.
Is humidity higher upstairs or downstairs?
Well, it’s actually normal—to a certain degree. Indoor air that’s warm and moist (humid) is less dense than dry air, which makes it rise. So here’s a good rule of thumb: If your second floor’s relative humidity* is 1–5% greater than your bottom floor, that’s normal.
Should I run my basement dehumidifier in the winter?
You should only run a dehumidifier in your basement in the wintertime if the room maintains a high relative humidity. To monitor the relative humidity in your basement, hang a humidistat (sometimes called a hygrometer) on the wall. It works like a thermometer, constantly measuring the relative humidity in the room.
How long does it take for a dehumidifier to dry basement?
6. How long will it take to get the moisture under control? As long as the dehumidifier you choose is large enough for the area it is working in, and there are no specific damp problems, then a dehumidifier will normally reduce the humidity to the chosen level within a few days to a week.
Is 60 humidity too high for a basement?
Indoor relative humidity (RH) should be kept below 60 percent — ideally between 30 percent and 50 percent, if possible. … Low humidity may also discourage pests (such as cockroaches) and dust mites.
When should you turn off dehumidifier in basement?
If the temperature or humidity drops below the ideal level, you will want to turn the dehumidifier off. You never want the coils or water to freeze because it can cause lasting damage to the device.
What size dehumidifier do I need for basement?
For a very damp basement or other space, it might be necessary to increase the size of the dehumidifier to efficiently remove the increased level of moisture from the air. Choose a dehumidifier that holds 12 pints of water for a 500-square-foot space, adding 5 pints for every additional 500 square feet.
Will mold grow at 55 humidity?
A relative humidity greater than 55 percent is enough to support the growth of black mold. … Household problems such as water and pipe leaks cause water intrusion and an environment perfect for black mold to grow. The mold can continue to grow unabated if a small leak goes undetected for a long time.
How do you get rid of humidity in the basement?
- Open the Windows. A great way to get air circulating in the room is to open up the windows whenever you’re down there. …
- Keep It Clean! Storing too many items in your basement will create clutter. …
- Seal Up Any Gaps. …
- Turn Up the Heat. …
- Get a Dehumidifier.
What should basement dehumidifier be set at in winter?
Reduce use in winter as humidity will drop with cold or when heat is in use. Set to 60% or below. 45-50% are good settings to use. Set to 30-60% for desired comfort range.
What are the disadvantages of dehumidifier?
Con: Noise and Heat Dehumidifiers also tend to blow warm air out of the back of the unit. In the winter, this can be an advantage — but not so much in the summer. Position the back of your dehumidifier in a doorway so that it doesn’t heat up the room from which you are removing excess moisture.
Will a dehumidifier warm a basement?
Even if you’re in a small room with a powerful dehumidifier that runs often, the air in your room will only increase a few degrees F. The room likely won’t even feel warmer with a dehumidifier. That’s because the dehumidifier is removing excess moisture, so you’ll feel more comfortable than without the dehumidifier.
How do I keep my finished basement dry?
- Insulate Your Cold Water Pipes. …
- Make Sure Your Landscaping Isn’t Damaging Your Foundation. …
- Improve Ventilation and Humidity. …
- Waterproof Your Basement Walls and Floors. …
- Make Sure Gutters and Downspouts are Working Properly. …
- Install a Sump Pump to Help Keep Your Basement Dry.
Why is my finished basement so humid?
The reason your basement gets wet or damp has to do with the fact that it lies below the grade or ground. Water can seep through and moisture can build up gradually, crossing the 60% mark. Water pipes can leak and ducts can let in moist air. The same goes for old basement windows.
How do you dry out a finished basement?
You can air out the basement by opening windows and running fans to circulate the air. You can also try turning up the heat in the basement, as warmer air will prevent moisture from condensing on cool surfaces. Another solution is to use a dehumidifier in your basement.
Do dehumidifiers use a lot of electricity?
Dehumidifier energy use is rather low. An average small 30-pint dehumidifier uses 300W of energy. … Essentially, a dehumidifier draws much less electricity than a water heater, an air conditioner, even a hair drier. An average dehumidifier draws about as much energy as a computer.
Why do dehumidifiers have to be up for 24 hours?
Why does the dehumidifier need to be to be upright 24 hours before running for the first time? It’s necessary for the oils in the compressor to settle before turning the unit on, not doing so can affect the performance of the unit.
Can a dehumidifier run non stop?
Yes! It’s totally safe to leave a dehumidifier running all night while everyone’s sleeping. Just make a note of these 3 factors before letting it run all night… You will want to make sure you have a tank with a sizable amount of room for water.
Does basement humidity affect upstairs?
What Happens When the Indoor Relative Humidity is High? … But humidity in the basement or crawl space affects the upstairs too. Since air flows into the upper levels of your home from the basement or crawl space, it brings the humidity from down there with it.
Why does a basement have high relative humidity in the summer?
How Humid Air Causes More Basement Moisture in the Summertime. … Air humidity is greater in the summertime simply because warm air is able to hold more moisture than cold air. This humid indoor air increases the risk of basement water damage because a lot of finished basements use drywall.
Is 60 humidity too high in a house?
When the indoor humidity level is below 30 percent, the air is too dry, which can harm both a home’s structural integrity and the homeowners’ health. Conversely, when the level is above 60 percent, the air is too wet, which is also harmful to both the home and the homeowners.