what size dehumidifier do i need

Truth ! What Size Dehumidifier Do I Need? [+Size Chart] 2023

High humidity can be uncomfortable if you live in an area with it. The air is thick and sticky and can be tough to breathe. Not to mention, all that moisture can wreak havoc on your home. 

In addition to damaging your wood floors, walls, and furniture, it is also likely to cause mold and mildew to grow. By removing excess moisture, a dehumidifier can make your home more comfortable and help protect your belongings. As well as being able to dehumidify large rooms, dehumidifiers are also available in different sizes.

How Dehumidifiers Are Sized?

Dehumidifiers are typically sized according to their total moisture removal capacity. This capacity is usually expressed in pints or gallons of water per day. In other words, a dehumidifier that can remove 50 pints of moisture per day can remove up to 50 pints per day, moisture. 

The size of the dehumidifier you need will depend on several factors, such as the area of the room, the amount of moisture in the air, and the level of humidity you desire. If you’re unsure of right choice, you can always consult with a professional to find the right one for your needs. So to know how big a dehumidifier you need; check the chart below.

Dehumidifier Size Chart by AHAM

Effects of HumidityMoulds & SeepageWet SpotsMusty SmellHeavy Air
For 1200 sq. ft Area
Required Pints
90 Pt (old std.)
60 Pt (new std.)
80 Pt (old std.)
55 Pt (new std.)
70 Pt (old std.)
50 Pt (new std.)
70 Pint (old std.)
50 Pint (new std.)
For 800 sq. ft Area
Required Pints
70 Pt (old std.)
50 Pt (new std.)
65 Pt (old std.)
45 Pt (new std.)
60 Pt (old std.)
40 Pt (new std.)
60 Pt (old std.)
40 Pt (new std.)
For 500 sq. ft Area
Required Pints
60 Pt (old std.)
40 Pt (new std.)
50 Pt (old std.)
30 Pt (new std.)
45 Pt (old std.)
30 Pt (new std.)
45 Pt (old std.)
30 Pt (new std.)
For 300 sq. ft Area
Required Pints
45 Pt (old std.)
30 Pt (new std.)
40 Pt (old std.)
25 Pt (new std.)
30 Pt (old std.)
20 Pt (new std.)
30 Pt (old std.)
20 Pt (new std.)

What Size Dehumidifier Do I Need?

Picking the right-sized dehumidifier depends on various factors, including the total square footage of your space and the relative humidity (RH) level. You’ll generally want a dehumidifier that can cover a larger space than the area you’re trying to dehumidify. 

This will help ensure that the unit can remove enough moisture from the area to lower the RH level to your desired level. The dehumidifier’s size is also important when considering the RH level. If the RH level is high, you’ll need a larger unit to remove excess moisture. Conversely, you can get away with a more minor team if the RH level is low.

What Size Dehumidifier di I Need? by Appliance Accreditor

What size dehumidifier do I need for 1000 Sq. ft?

The size dehumidifier you need for 1000 sq ft will depend on the specific conditions of the room or space that you are trying to remove moisture. The 30-pint dehumidifier is a reasonable general estimate for this size room. 

Still, you may need a larger or smaller unit depending on the humidity levels in the room and the amount of time that the most dehumidifier will need to run to achieve the desired humidity level.

Can a dehumidifier be too big for a room?

In order to dehumidify the air, water vapor is removed. They are often used in homes and other buildings to control indoor humidity. If a dehumidifier is too big for the room, it will remove too much water vapor from the humid air.

This can result in the room feeling damp and clammy. Additionally, the dehumidifier will run more frequently, increasing energy costs. The ideal humidity level, in hot is 40-60 percent and 30 to 50 percent in colder.

How do I determine what size dehumidifier I need?

According to the amount of moisture removed within 24 hours, you need a dehumidifier of the appropriate size. 

To calculate the amount of water removed, multiply the room’s length, width, and height. From this, you can get a sense of how big the space is and how quickly it can crawl spaces. To find the dehumidifier capacity, divide the room’s importance by 2. This will provide you with the number of gallons of water the dehumidifier can remove in 24 hours.

How do you size a dehumidifier for a drying room?

Dehumidifiers are an essential tool in the horticultural industry, as they help control the humidity in drying rooms and dry out the air. Depending on how much water your plants require each day, the size and type of dehumidifier you need will vary.

To calculate the length of dehumidifier that’s your need, multiply the number of gallons of water you give your plants each day by a factor of. This will provide you with the number of pints of water the dehumidifier will need to remove from the air daily.

Importance of Dehumidifier:

  1. The best way to protect your home from mold and mildew is to, learn how to choose a dehumidifier according to the square feet area, efficiency and demand. For example, if you choose the 70-pint dehumidifier, it will remove up to 70 pints per day, of moisture and 50-pint dehumidifier will remove up to 50 pints /day similarly 30-pints rated to remove 30 pints of moisture only.
  2. Small rooms are the most difficult to keep dry and comfortable, but luckily there are many options in dehumidifier for your basement spaces. A whole-house dehumidifier is the best choice for a basement that gets a lot of use, even if it is small. The portable dehumidifier can be a good choice for basements that are rarely used, as it doesn’t take up a lot of space and it’s easier to move from room to room.
  3. When you are trying to find the right dehumidifier then short list all the factors to consider and choose the right size dehumidifier for your home because it is the key to making sure that it will do the job it needs to do. So, must know demands and needs? Because, room size vs dehumidifier size are crucial e.g. if you get a dehumidifier which is too small, this dehumidifier won’t get enough moisture out of the air. Larger dehumidifier will take up a lot of space and produce more heat than is necessary.

FAQs: What Size Dehumidifier Do I Need?

What is a good capacity for dehumidifier?

A good capacity for a dehumidifier is 16 to 44 US pints or 6 to 20.8 liters. Dehumidifiers are devices that are used to remove moisture. This can be beneficial in several ways, including reducing the amount of mold and mildew in your home, reducing the number of dust mites, and making your home more comfortable overall. So try to buy a whole house dehumidifier as high or low capacity dehumidifier matters a lot. Dehumidifiers don’t produce the cool air like air conditioners.

Where should I put my dehumidifier?

Generally, dehumidifiers should be placed in an area with good ventilation to ensure efficient operation. This will help ensure that the team can effectively remove moisture from the air, helping to improve the overall air quality in your home. Additionally, placing the unit in a well-ventilated area will help prevent condensation, mold growth and mildew, which can be a health hazard.

How much can a dehumidifier lower humidity?

A dehumidifier can lower humidity by 30 pints to 70 pints of water per day. This ability to remove air’s moisture is determined by the size and capacity of the dehumidifier. As air passes over the coils, the dehumidifier extract moisture from the room. These coils are cooled by a refrigerant, which causes the water in the mood to condense on the waves. The water is collected in a tank, and the air is passed back into the room.


If you’re still unsure which size dehumidifier do you need for your home, a good rule of thumb is to consider HVAC and choose a unit that can cover twice the square footage of the room you’re planning to using a dehumidifier in. 

This will ensure that you have adequate coverage and that your unit can effectively remove the moisture from the air. Finding the best dehumidifier for your needs is easy with some planning and research.

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