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The Global Insight

What should a dehumidifier be set at in the winter

Author

Ava Hudson

Updated on April 23, 2026

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.

Should I run dehumidifier in winter?

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.

What is a good temperature to set a dehumidifier at?

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

What is a good indoor humidity level in winter?

Ideally, a home should have a humidity level of about 45%. If it dips below 30%, it’s much too dry, and if it’s above 50%, the high humidity may start to feel uncomfortable. If your home humidity level stays around 45%, your living environment will be cleaner, safer, healthier and more comfortable.

Is it bad to 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.

Is 30 percent humidity too low?

The healthy range for humidity is around 40% to 50%, with a little tolerance for going higher or lower; however, humidity should never be allowed to fall below 30%. Humidity level lower than 30% is what is characterized by very dry air, as well as other symptoms synonymous with the atmospheric condition.

Can I leave dehumidifier on 24 7?

The best answer would be to run your dehumidifier unit 24 hours a day. However, that could end up costing quite a bit of money, and more than you really need to spend.

What percent should the humidity be in a house?

The ideal relative humidity for health and comfort is somewhere between 30-50% humidity, according to the Mayo Clinic. This means that the air holds between 30-50% of the maximum amount of moisture it can contain.

Is 60 humidity considered high?

A home should have a relative humidity of 30% to 60%. Above 60% and you have what’s considered “high” humidity. Besides being less comfortable, high humidity causes a host of other problems in your home, including: Growth of fungus and mold in various parts of the home.

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.

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What humidity level should I set my dehumidifier in my basement?

Basements are more exposed to a constant source of moisture from the external environment; therefore, your dehumidifier should run very frequently. Molds tend to become a problem at a relative humidity of 60% and above. Therefore, we recommend that you keep your basement dehumidifier within a range of 40% to 60%.

When should I turn on my dehumidifier?

The best time to use a dehumidifier is before the humidity begins to affect your household. When you walk in the house after being outside on a hot and sticky summer’s day, you want to be met by a blast of refreshing, cool air – not additional stickiness.

How long does it take for a dehumidifier to dry out a room?

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.

Should I turn off my dehumidifier at night?

Don’t run it 24 /7. Homeowners need to realize that dry air can cause more harm than humid air. For ideal health and well being, people must keep an eye on home humidity levels. When you find the relative humidity (RH) going below the 30% – 50% range, you need to immediately switch off the dehumidifier.

Is it OK to leave a dehumidifier on overnight?

Most dehumidifiers can handle overnight running with relative ease far as there is no err on your path (maintenance, air flow, no blockage, leakages), it is very safe to use overnight. It is recommended that the device has the auto defrost feature however, if for any reason it starts to overheat, so it goes off.

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.

What is a good humidity level for a basement?

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.

Why do dehumidifiers freeze up?

The most common cause of frost and ice buildup on a dehumidifier is because the unit is operating in temperatures that are too cold. … There are some models made for cooler basements that operate down to temperatures of 36 degrees. Poor airflow, due to a dirty filter, also can cause freezing of the coils.

How low is too low for indoor humidity?

If outside temperature is 0 to 10 degrees, humidity indoors should not be more than 30 percent. If outside temperature is 10-below to 0, humidity indoors should not be more than 25 percent. If outside temperature is 20-below to 10-below, humidity indoors should not be more than 20 percent.

Is 55 indoor humidity too high?

Too much humidity can cause mold, mildew and other contaminants to grow in your home. … During summer months, homes should have between 30 and 45 percent humidity. During the winter, humidity levels should be kept between 45 and 55 percent humidity.

How can I lower the humidity in my house in the winter?

  1. Control the sources of moisture. Vent all gas burners and clothes dryers to the outdoors. …
  2. Winter ventilation. The cold winter air contains less water and is therefore less humid. …
  3. Warm it up. A third way to control moisture is to turn up the indoor temperature. …
  4. Place a moisture absorber.

Is 70 humidity high inside?

Research from the Building Science Corporation found that humidity of 70% or higher adjacent to a surface can cause serious damage to the property. The Health and Safety Executive recommends that relative humidity indoors should be maintained at 40-70%, while other experts recommend that the range should be 30-60%.

What humidity level is considered dry?

6 Ways Dry Air Affects Your Home The ideal relative humidity level for maximum comfort and health is between 40 and 50 percent, and anything below 30 percent is considered too dry. Humidity levels naturally drop along with outdoor temperatures as cold air is unable to hold the same amount of moisture as warm air.

Is too much humidity bad for your lungs?

Weather that’s too humid or not humid enough can make it harder to breathe when you have chronic obstructive pulmonary disease (COPD), a lung disease that gets worse over time. Changes in humidity and temperature can trigger a flare-up.

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.

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.

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.

Can mold grow in 40 humidity?

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.

How can I get humidity below 50?

  1. Use Your Air Conditioner. …
  2. Actively Use Your Exhaust/Ventilation Fans. …
  3. Take Cooler Showers. …
  4. Fix Any Leaking Pipes. …
  5. Keep Your Gutters Clean. …
  6. Dry Your Laundry Outside. …
  7. Get a Dehumidifier. …
  8. Move Your House Plants.

Should you run a dehumidifier in your 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.

How do I know if my dehumidifier is working properly?

Hygrometers are inexpensive and readily available. Set the humidistat at the appropriate level; usually, we recommend around 35% relative humidity. After the dehumidifier has run for around an hour, check the reading on the hygrometer. If the unit is functioning the display should tally with the setting.