Normal Basement Humidity Levels

A comfortable basement should maintain a humidity level of 30 to 50 percent — however, those may differ depending on your climate.

Is 60% humidity too high for a basement?

Sometimes, humidity or dampness (water vapor) in the air can supply enough moisture for mold growth. 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.

What should I set my dehumidifier at in the basement?

The ideal setting for a dehumidifier in the basement is between 30% to 50%. Mold can develop when humidity levels rise to 60% or higher, so it's best to keep the percentage low. Some sources suggest a setting of 45%, but the numbers will vary depending on your preference or needs.

What is a good humidity level for a basement in winter?

Winter humidity control in the basement is a little different as the cold air from outside can make the humidity levels in your basement drop. During winter months, optimal home humidity levels should be around 25 to 40 percent.

What humidity is too high for basement?

Although 30 to 50 percent is ideal, anything above 60 percent is considered excessive. If your basement feels damp, it's probably too humid. You'll need to take action, or you risk accumulating mold, mildew, and fungal growth and the creation of ideal termite conditions.

What is the Best Humidity for Your Home

Should you run a dehumidifier in the basement all the time?

As you debate whether or not to use a dehumidifier in winter, you should always watch the humidity levels in your home. If your relative humidity levels stay high, it might be a good idea to run your device. In fact, if your humidity levels remain above 50 percent, your room will benefit from a basement dehumidifier.

Is 70 humidity too high for basement?

A relative humidity level of 70 percent or higher creates the perfect breeding ground for mold growth. Leaving basement mold unchecked could amount to unhealthy indoor air, causing sickness to your family and aggravated upper respiratory issues. Also, home-destroying mold could also cause costly foundation damage.

Does heating your basement keep your house warmer?

It's looking at the heating bill! You should heat your unfinished basement. If you have cold floors, then insulating the basement ceiling will help the most. Once insulated, heating an unfinished basement will help warm your whole home.

What setting should I keep my dehumidifier?

Use a dehumidifier to reduce the humidity in your home below 50%, making it a less suitable environment for dust mites. The optimal range for a home dehumidifier is to use a setting between 30%-50%, based on your comfort. 45% is reported by many people as ideal.

What humidity level should I set my dehumidifier?

Set the humidity level.

The optimal relative humidity level is between 30 and 50 percent, according to Energy Star (and 30 to 40 percent in colder areas during heating season). If the humidity is higher than that, it can breed dust mites, mildew, and mold, and trigger allergies.

Will mold grow at 55 humidity?

High Humidity

Humidity levels typically need to be at 55% or higher before mold begins to grow. Humidity mold can be controlled in your home through proper ventilation, which can reduce the likelihood of mold presence, and using a dehumidifier.

Should a dehumidifier run constantly?

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.

Should you run a dehumidifier in the basement 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.

Is 53% humidity too high for basement?

Normal Basement Humidity Levels

A comfortable basement should maintain a humidity level of 30 to 50 percent — however, those may differ depending on your climate.

Is 65% humidity too high for basement?

Anything above 65 percent of moisture in the air is considered a high humidity level. Excess humidity in the basement can be caused by various reasons. These include: Leaking exhaust vents.

Will a fan in the basement help reduce humidity?

A fan itself won't really help with the humidity levels in your cellar, but it will help with getting air moving into the room from other areas such as the rest of the house and outdoors. Having a fan on a low speed regularly in your basement will improve airflow – thus moving the wet air out and the dry air in!

How much water should a dehumidifier collect in a day?

Most dehumidifiers will remove between 30 and 70 pints of water per day. It's probable that a newly installed dehumidifier will run constantly, especially in excessively humid weather conditions.

What temperature should a basement dehumidifier be set at?

Ideal Dehumidifier Operating Temperatures. The ideal operating temperature for refrigerant dehumidifiers is between 70 and 90 degrees F.

How long should a dehumidifier run per day?

To achieve the highest energy efficiency, run a dehumidifier for at least 12 hours a day. This will allow you to remove moisture from the air without racking up the energy costs.

What temp should basement be in winter?

Try using rugs and even roughed-in insulation to warm the space to at least 55 F. In the summer your basement will probably stay cooler than the rest of the house, but keeping it at 80 F or lower will help suppress humidity and mildew. Ideal Basement Temp: 55 F to 60 F in winter; less than 80 F in summer.

Should air vents in basement be open or closed in winter?

Air vents should be open to prevent damage

Increased air pressure can create cracks and holes in the ductwork. It can also cause your furnace's heat exchanger to crack. Leave all air vents open to prevent extensive damage to your home's heating system this winter.

Should I close vents in basement?

There's no harm in closing a few basement vents. However, you should make a point of reopening those vents after a day or two of leaving them closed. You should also try and keep the vents on all the other floors of your home open to promote consistent and effective airflow.

How can I get humidity out of my basement without a dehumidifier?

How to Keep Basement Dry Without a Dehumidifier

1. Set Houseplants Near Windows. ...
2. Hang Baking Soda In Plastic Bags.
3. Use Fans in the Room. ...
4. Purchase Carpeting Mats. ...
5. Place Damp Rid in Your Basement. ...
6. Install a Vent Fan. ...
7. Add Extra Drainage and Waterproofing.

How long does it take for a dehumidifier to dry a basement?

The key to drying a basement fast is using high-volume fans and dehumidifiers. The fans help water evaporate, while the dehumidifiers pull it out of the air. When used properly, they can dry a wet basement in as little as 12 hours.

What month should I run my 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.