What Size Dehumidifier For Basement | Factors To Choose Humidifier Size


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People prefer to purchase a dehumidifier to reduce humidity in a room or basement to prevent hazardous mold growth and related health problems. But what size dehumidifier for basement is good? They are concerned about the size of the dehumidifier they should buy. 

Mold needs moisture to develop and spread, so using an air dehumidifier is simple to prevent it. Dehumidifiers are small, low-cost machines that are simple to operate, making them ideal for wet, moldy basements and other areas.

What Size Dehumidifier for Basement

What Size Dehumidifier for Basement

Choosing the right size for your dehumidifier for the basement is important if you want to remove excess moisture from your home, improve the air quality, and prevent mold growth in your home. 

When talking about the size of an air dryer, you don’t need to know its height or weight. Instead, how many liters of water it can collect from the air in a day. Dehumidifiers that remove more moisture from the air in a day are often larger, taking up more room than those that remove less moisture, but while considering the size of the dryer, consider how much work you’ll be doing.

Start by measuring the area in which you want to place the dehumidifier. To determine how many square feet you are dealing with, use a tape measure to measure the length and width of the room and multiply them. For example, a 20 feet long and 15 feet wide room adds up to 300 square feet (20 x 15 = 300).

Then use the suggestions made from the Association of Home Appliance Manufacturers (AHAM) to assist homeowners in choosing the right size dehumidifier:

Exact Size of dehumidifier

  • A 30-pint dehumidifier is the recommended size for rooms up to 1,500 square feet, regardless of the humidity in the area. 

This means it is suitable for most residential basements. This size is also recommended for plots up to 2,000 square feet, provided the area is not more than moderately humid; for example, if the room is damp and smells of mold, it is very humid, but not always.

  • A 40- or 50-pint dehumidifier is the recommended size for rooms up to 2,000 square feet that appear damp and smell like mold all the time. Or where moisture is visible on the walls or where you have been exposed to. Mold growth. 
  • A 60 or 70-pint dehumidifier is the recommended size for areas larger than 2,000 square feet.

Most dehumidifiers have a bucket to collect water, which must be emptied periodically. However, some models can be configured to drain automatically if you install them next to a suitable drain. These models work well in basements where floor drains are often installed. However, all that water that is taken out of the air has to go somewhere.

Frigidaire has developed the best dehumidifiers overall after evaluating the main brands of dehumidifiers based on performance, reliability, durability, and pricing. They are very quiet and have a built-in air filter so that they not only remove moisture from the air and airborne dirt particles. You can also set the desired humidity level, which is very important to prevent mold growth.

Factors to Consider when Choosing the Ideal Humidifier Size

Factors to Consider when Choosing the Ideal Humidifier Size
  • The size of the room or space (for example, square feet (ft²) will be used)
  • The current humidity level or condition of the room or space
  • Indoor or indoor temperature

The rooms or basement size

The first and most important thing to consider when purchasing a dehumidifier is the size of the room or spaces you want to dehumidify. As a general rule, the larger the room you want to dehumidify, the more you will need a large and powerful dehumidifier.

The current humidity level or condition of the room or space

Just as important as the size of the room is the humidity level in the room you want to dehumidify. This will show the size of the desiccant humidifier, as it will measure how much it needs to dry.

For example, a large room that is not very humid but not very humid will not necessarily need a large dehumidifier. However, small room humidity will require a larger, more powerful dehumidifier.


While this is not as important as the size of the room and the humidity level, the ambient temperature should also be taken into account. Some dehumidifiers work best over a specific temperature range (typically above 68 degrees Fahrenheit). With these factors in mind, make sure that no external factors could influence your conclusions.

For example, be sure to completely measure a room or space despite furniture, close doors and windows (if applicable) if you don’t want to use the dehumidifier with doors and windows open, and make sure that the temperature is within your normal settings.

Frequently Asked Questions

Can a dehumidifier be too big?

A simple dehumidifier will remove moisture from your home’s air, but the area’s size will determine the size you need. A model that is too little for your room will not leave traces in humid air, while a too-large model will dry out the air excessively.

How big of a dehumidifier do I need for a size of 800 square feet?

Because humidified air seeks out and humidifies dry air in your home, a three-gallon unit in a single bedroom (which can cover up to 800 square feet) will work upstairs.

Should I use a dehumidifier on low, medium, or high?

A higher fan setting results in faster removal of moisture from the air. When you turn on the dehumidifier for the first time, you can set the fan to “High” to reduce the humidity to a level that can be easily kept at “Low.”

Will a basement dehumidifier help the whole house?

Yes, of course, naturally. But for a dehumidifier to serve the whole house, it has to be a whole-house dehumidifier. As previously stated, these units can service up to 5,000 square feet or more. Which is roughly the typical size of most homes today.

Is a dehumidifier enough for a basement

If you are looking for a dehumidifier that can handle high humidity throughout your home. You should choose a whole-house dehumidifier. This type of dehumidifier can be installed in your basement or anywhere else in your home. You prefer and will work to reduce humidity levels throughout your home.

Which dehumidifier do I need for my basement?

Pick a small one that holds 10 quarts of water in an area of 500 square feet; add 4 quarts of capacity for each additional 500 square feet. So, to size a humidifier for a 1,000 square footage basement room. You would need to add 4 quarts for a total capacity of 14 quarts.

Can you get an oversized dehumidifier?

Basements have high relative humidity levels, ranging from 70% to 100%, and are small in size. Dehumidifiers are excellent for removing extra moisture.


You can determine the size of the dehumidifier that suits your room. And how to measure the humidity level in the room. In general, there is no need to do complex calculations (such as the airflow rate in your room. Or the exact volume of the area you want to dry) to determine which dehumidifier you need. Just find a dehumidifier that’s rated for the size (in square feet or meters) and humidity level of your room.

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