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How to Choose the Right Size Dehumidifier in 2023: In-depth Guide

how to choose the right size dehumidifier
Written by Callum Strempel

Experts frequently highlight the need of maintaining humidity levels inside our homes, since dry air might cause breathing problems and create a variety of health issues.

In addition, excessive humidity can cause major health issues such as allergies, mold spores inhalation, and the darkening of your apartment’s walls.

If your house or particular rooms are afflicted by dampness or moisture, you will require a high-quality dehumidifier.

However, before purchasing one, you must first calculate the size of the device you need. Not only do they come in a variety of brands and variations, but they also vary in capacity and size.

In this post, we’ll go over the most important features to look for in a dehumidifier and show you how to choose the right size dehumidifier.

Types of Dehumidifiers

1. Refrigerator-Style Dehumidifier

A refrigerator-style dehumidifier is among the most common types of dehumidifiers available on the market.

They operate by drawing in and chilling humid air from an area. After cooling, the dehumidified air is returned to the area.

This is an efficient method of removing humidity from the environment and it may be used as a dehumidifier option in any room of your home.

The issue with this sort of dehumidifier arises when it is used in extremely cold conditions.

Because this type works by chilling the air before actually dehumidifying it, it is not suitable for usage in colder environments.

Many colder areas have freezing temperatures, so cooling the air might be difficult. As a result, these devices do not function well in colder areas, thus you should choose another device.

2. Desiccant Dehumidifier

If you reside in a subzero region, it is worthwhile to invest in a desiccant dehumidifier. These dehumidifiers function by sucking in air and transferring it through a desiccant material.

Usually, this would be something such as silica gel. This is a material that absorbs moisture quite well, making it a great candidate for placement in these sorts of devices.

Desiccant dehumidifiers are available in a variety of forms, ranging from portable to extremely large commercial units.

You can install them in a subzero environment and they will perform flawlessly, so you won’t have to think about freezing or other issues that can hinder them from providing results.

These dehumidifiers could be installed in a huge basement, or you can get smaller portable types that can be connected directly to a wall everywhere you want them.

3. Portable Dehumidifier

Portable dehumidifiers are by far the most popular type that you might find people purchasing. These dehumidifiers can usually dehumidify medium-sized spaces with great reliability.

You may also buy larger models that will also work effectively in larger rooms, but they are usually not designed to dehumidify a whole house.

They will work great in any room you put them in and will make things a lot more pleasant for you. Portable dehumidifiers are typically inexpensive, so they may be acquired without making a significant impact on your wallet.

They are also quite simple to operate, making them an excellent choice for almost anyone.

4. Mini Dehumidifier

Mini dehumidifiers are quite handy. People frequently use dehumidifiers of this type in their bedrooms.

They are ideal for usage in a little kid’s bedroom if they require humidity protection. Mini dehumidifiers are fairly compact and can fit into even the smallest of areas.

If you reside in a house where space is limited, you may want to consider acquiring one of these devices. They are effective in removing moisture from the air, and you’ll be impressed with how affordable these devices are.

If you buy one of these small devices, you will spend a fraction of the price of a standard portable dehumidifier.

How to Choose the Right Size Dehumidifier: What to Expect

1. Dehumidifier Capacity in Pints

A dehumidifier’s pint capacity is the quantity of humidity a dehumidifier can absorb from a room in a 24-h period.

The humidity level and size of a certain space have a significant impact on the performance of a dehumidifier.

Dehumidifiers with a pint capacity of 70 or less are typically optimal for home usage, while those with capacities greater than 70 pints are ideal for commercial or industrial applications.

2. Room Dimensions

You must first measure the space where your dehumidifier will be used. Use a measuring tape to determine the square footage of your room.

Measure the width and length of space and after that multiply them. A room that’s 60 feet long and 20 feet wide has a total area of 1200 square feet (60 x 20 = 1200), for instance. 30-pint dehumidifiers are appropriate for spaces of 1500 square feet, regardless of how moist the space is.

As a result, these dehumidifiers are suitable for the majority of household basements. They are also suggested for spaces of 2000 square feet if they are just moderately moist.

50-pint dehumidifiers are suitable for rooms of 2000 square feet that odor musty and are always moist.

These are areas where mold has already grown or where dampness is apparent on the surfaces. 70-Pint dehumidifiers are ideal for places greater than 2000 square feet since these dehumidifiers are designed for extremely moist environments with water spots on the floor.

3. Sizing Chart for Dehumidifiers

To make your selection even easier, we’ve put up a useful sizing chart. This chart can assist you in determining the appropriate size of your dehumidifier.

choose the right size dehumidifier

4. Humidity in the Room

The relative humidity within the room is one of the most obvious factors to take into account. If the humidity level in the room is significant, a larger dehumidifier might be required to extract the excess moisture.

Before purchasing a dehumidifier, it is advised that you utilize a hygrometer to obtain an accurate humidity measurement in your room.

It might be difficult to know the humidity levels solely on your senses, which is why it is critical to take correct readings.

5. The Temperature in the Room

Lastly, the room temperature is also an essential aspect to consider. Dehumidifiers perform better in hotter environments.

So, if you’re trying to dehumidify colder space, you’ll require a larger dehumidifier. Usually, refrigerant dehumidifiers can operate at temperatures as low as 41°F.

But do not expect it to function quite well if you are trying to dehumidify a space at such low temperatures. The lower the temperature in the room, the poorer your dehumidifier should work.

Things to Consider When Choosing a Dehumidifier

1. The Number of People Living in the House

People are constantly releasing water into their surroundings.

Our bodies release moisture that is collected by the air surrounding us, whenever we are breathing, speaking, or sweating. As a result, it’s natural that the requirement for a greater capacity dehumidifier will grow as the number of residents in a household grows.

According to some sources, every four persons in your home will require an additional 5 pints of dehumidifier capacity.

2. Dryer and Washer

If your house has a washer and dryer, you’ll need more humidity removal capacity. This is because water is always evaporating and flowing while you use your washer or dryer.

If you have a huge family or generally do a lot of washing, you may wish to increase your total calculation by 5 pints.

3. Doors and Windows

Moisture may also enter your home through open windows and doors.

If you reside in a humid region with a lot of people continually passing through your house, or if you just prefer to leave doors and windows open to breathe fresh air, you may want to increase the capacity by 5 pints to satisfy your home’s demands.

4. Bathroom

Your bathroom is a haven for mold and bacteria.

Using the toilet, washing your hands, and taking a shower may raise the humidity level in your bathroom.

If you enjoy long showers or if you have a large number of individuals living in your house who take many showers each day, you may want to add extra 10 pints to your estimations.

This is particularly true if your bathroom is poorly ventilated.


1. What Will Happen if My Dehumidifier Isn’t Big Enough?

Ans. Using a limited capacity dehumidifier to remove moisture from huge areas is similar to overloading the appliance, which affects the appliance’s lifespan.

2. How Much Area Can a 70-Pint Dehumidifier Cover?

Ans. 70-pint dehumidifiers are suitable for spaces ranging from 1,000 to 2,500 square feet. These dehumidifiers would be louder, but they should absorb humidity more quickly and efficiently.

3. How Large a Dehumidifier Do I Need for My Garage?

Ans. That is entirely dependent on the area of your garage, although 70-pint dehumidifiers are normally adequate for most workshops and garages. Furthermore, even a smaller dehumidifier may absorb enough humidity from the room to make a big difference.

4. What Size Dehumidifier Do I Require for a 2500 Square Feet Space?

Ans. In the following situations, 70-pint dehumidifiers are recommended: wet spaces from 2,000 to 2,500 square feet, extremely damp spaces from 1,500 to 2,500 square feet, and extremely damp spaces from 1,500 to 2,500 square feet.

About the author

Callum Strempel

Licensed Plumber

Hi, I’m Callum, a full time plumber with a plumbing license issued by my state. So far, I’ve spent nearly a decade and a half installing and fixing a wide variety of plumbing components and units. My profession inspires me to talk about the kitchen and bathroom (and the plumbing system) so confidently and knowledgeably that I offer my free consultations to help neighbors and fellow homeowners every now and then. As I enjoy installing faucets, sinks, showers, and fixtures, I love to see people enjoying services from those components for years to come. So, I write every week to inform you and others. Will you mind going through some of my articles on this website?

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