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What Size Dehumidifier Do I Really Need?

What Size Dehumidifier Do I Really Need?
Last Updated: 09 July 2020

Maintaining humidity is one of the problems that homes face and as minors, as this problem may seem, humidity can pose a big problem if it isn’t maintained well. As much as dry air can cause quite a several health problems, a lot of humidity is also not any better as it has quite many health risks such as allergy problems. Too much humidity can also cause bad home problems like growth of mold and mildew and wall discoloration in the house.

If your home, office or a certain part of your home is afflicted with moisture and humidity, a dehumidifier is what you need. Having a dehumidifier in the house helps in getting rid of excess moisture in the atmosphere thereby regulating humidity to a moderate level where the lives of living and nonliving organisms like furniture would no longer be at risk. As opposed to a dehumidifier, when to use a humidifier is when you are looking to increase the humidity of the air.

However, before you go on to purchase your dehumidifier, there are quite some things that you need to consider. Some of the factors that you need to consider while deciding how to size a dehumidifier are the house size and the capacity of the dehumidifier that you want to go for. Therefore, the most important factor to consider is the size of the dehumidifier and the size of the room/space that it can serve as this affects its moisture-removing abilities.

This is where the question “what size dehumidifier do I need?” comes in because buyers know what to know if they are purchasing the perfect dehumidifier for their house. It is, therefore, beneficial to make lengthy research on the type of dehumidifier that your home or space would be needing. In this article, we would be answering some of your burning questions as regards the dehumidifier and how to choose the best for your space.

Dehumidifiers Sizes

There are several types of dehumidifiers and they are all classified according to the amount of moisture that they can eliminate and the size of rooms/space in which they are to work. Dehumidifiers can be classified according to their water tank capacity too. Water tank capacity determines the moisture-absorbing level and with the water tank capacity, you can learn how to determine the dehumidifier size.

Dehumidifiers can be classified according to their water tank capacity to:

Large Capacity Dehumidifier

Large Capacity Dehumidifier

If your home is afflicted with extreme humidity especially during the hot weather then a big size dehumidifier is what you need. The large capacity dehumidifier can remove 60 and more pints of water from the home in a day but you can easily modify the dehumidifier to either increase the maximum moisture removal capacity as you like. Even though they are relatively quieter, these large capacity dehumidifiers can function through a wider range of humidity. A large capacity dehumidifier can function as the best basement dehumidifier.

Medium capacity Dehumidifier

Medium capacity dehumidifiers can remove up to 50 pints per day and while they can also function well, they work best in moderately wet places like a laundry room. While they might not be so efficient in damp places, they can still be used to dehumidify a small apartment or even act as a basement dehumidifier.

Small Capacity Dehumidifier

Small Capacity Dehumidifier

Small capacity dehumidifiers can remove a fair amount of moisture per day and they can even function as far as removing up to 35 pints of water per day. They work best with enclosed places like bathrooms, bedrooms and enclosed kitchens. They are not particularly suitable for wet areas but they can still work well in enclosed spaces. A small-capacity dehumidifier can function efficiently as the best dehumidifier for crawl space or as a basement dehumidifier.

How Big of a Dehumidifier Do I Need?

Before choosing the size of a dehumidifier to go for, there are a number of factors that you need to look at. They are:

  • The number of humans and pets in the space: Humans and pets naturally expel moisture and all we have to do to increase the humidity is by performing simple actions like speaking, sneezing, coughing, barking and even breathing. Therefore, for every 4 people in the home, you would be needing 5 pints of water.
  • Washer or Dryer: Since water is constantly used with washer and dryer, you would need additional water-removing capacity. 5 more pints would be perfect for the laundry room.
  • Bathroom: Bacteria and mold love staying in the bathroom mainly because of its dampness and wetness. Activities like taking one’s bath, washing hands, flushing toilets and several others that involve water increase the humidity level of bathrooms. Therefore, while removing moisture from the bathroom, you might want to add 5-10 more pints of water to the calculation.
  • Doors and windows: Moisture can easily enter the space through doors and windows. With rooms that have doors that lead outside directly, an extra 5 pint is needed.

What Size Dehumidifier for Basement

What Size Dehumidifier for Basement

When it comes to determining how to size a dehumidifier for basement, you might want to be practical. Dehumidifier sizes for basements would depend largely on these 2 questions; what humidity should my basement be? And what size should my basement be? To get the size (area) of your basement, all you have to do is measure the length and breadth of the room then multiply the two. To get a humidity level, you might need to monitor it and assess its dampness level. After this, you would look for a basement dehumidifier that is rated for the exact size and humidity level of your basement. And there you have your dehumidifier for basement.

What Size Dehumidifier Do I Need for my House?

When choosing a dehumidifier for your house, you might want to consider the size of each bedroom in the house, bathrooms, kitchen, basement and then the overall size of the house in general. Another factor that must be taken into consideration is the fact that most of these rooms so feature curves and demarcations and these can affect the effectiveness of the dehumidifier.

A large capacity dehumidifier is often the best for a house especially if it features a good moisture removal rate. A large capacity dehumidifier that is close to the total size of your home would do just fine especially if your home doesn’t already have a basement dehumidifier. This would do a good job of keeping the room humidity level even.

You might consider getting the whole home dehumidifier if your house is really large as this type of dehumidifier can serve up to 5000 sq. ft. or even more.

What Size Dehumidifier Do I Need for a Bedroom?

What Size Dehumidifier Do I Need for a Bedroom

If you know what you are looking for, getting the best dehumidifier for your bedroom should be pretty simple. The first thing that you need to do is know just how large your bedroom is. After this, you need to put into consideration the other factors that contribute to the humidity level.

For a simple bedroom, a small or medium capacity dehumidifier that can also function as a basement dehumidifier would do just fine.


The question “What size dehumidifier should I buy?” might already be running through your mind. Before you answer this question, knowing the size of your home, in general, is very important as it would aid in knowing what size dehumidifier that you need to purchase. At homemakerguide, our advice for you would be this: the larger the size of your home or space, the larger the dehumidifier capacity you should be looking to buy.

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