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What dehumidifier size do I need?

What dehumidifier size do I need?

Dehumidifiers can make an incredible difference in the air quality in your home. They help reduce moisture and mold and help with all possible health conditions, from asthma to allergies. However, dehumidifiers come in a variety of sizes and designs. Choosing the right dehumidifier for your home can be confusing and difficult, especially when it comes to finding the right dehumidifier size for a room.

However, we at Best of Machinery are here to help you. Below are some of the key features of dehumidifiers to help you better understand how they work and what size you need for different room sizes and types. This will help you understand what dehumidifier size you need and make it easier for you to buy the right dehumidifier for your home and needs.

Why do I need a dehumidifier?

Excessive humidity can cause major problems for your home and your health. Moist air can cause mold, condensation and even structural damage to your walls, as well as unsightly stains, peeling wallpaper and bad smells. It can also pose health risks, exacerbate allergies and diseases such as asthma and cause breathing difficulties.

A dehumidifier sucks air from its surroundings, draws the water and releases the air again, while the water is stored in the water tank of the dehumidifier. This reduces the moisture content that can float freely in the air and helps to dry out your living space and keep your living environment pleasant and well-kept. You are looking for a humidity of 40% to 60%. If you use a dehumidifier that is too small, it will be difficult to keep the humidity as low as possible, and you will still suffer from several health risks and negative effects of excessive humidity.

Size vs. capacity

If you want to find out what dehumidifier size you need to keep your room dry and comfortable, you’re actually looking for its capacity. Capacity refers to the amount of water that a dehumidifier can extract from the air within 24 hours, not the physical size of the device or its water storage tank. This is the most important way to measure the performance and effectiveness of a dehumidifier in a room. Therefore, this metric is most often used to compare dehumidifiers.

Most dehumidifiers rarely reach their official capacity because this number is the measure of peak performance in ideal conditions, a situation that most dehumidifiers will never actually experience. The rate at which water is drawn depends on several factors, particularly the temperature and humidity of the ambient air.

Find out the size of your room

The first thing you need to do is figure out how big the room you want to dehumidify. This can be easily achieved since you only need an approximate measurement. Don’t worry about things like niches or unusually shaped corners. Simply measure the length and width of the room and multiply them to get the area of ​​your room. This measurement in square feet is the most commonly used system to understand the size of the room and therefore the appropriate dehumidifier capacity.

What size dehumidifier?

As a general guideline, the following dehumidifier sizes are recommended for moderately humid conditions. Simply select the next available dehumidifier size in humid environments! For small spaces up to 400 square feet: a dehumidifier with a capacity of 10 pint should be sufficient. Medium rooms up to 800 square feet are suitable for dehumidifiers with a capacity of approximately 1 gallon.

Larger rooms of approximately 1500 square feet require a dehumidifier with a daily capacity of approximately 2 gallons. Anything larger will be a problem for most commercial home dehumidifiers, and you should consider buying an entire home dehumidifier for rooms of this size.

Dehumidifiers for the whole house

Whole-house dehumidifiers are large and expensive dehumidifiers that can either be installed as stand-alone devices or connected to an existing central heating or air conditioning system. These devices represent a large initial investment, but work efficiently enough to save a large sum of money in the long run! If you are trying to keep your entire house dry, or a single room over 1500 square feet, this is the best option because dehumidifiers for the whole house are designed for rooms up to 3000 square feet.


Dehumidifiers are an important household appliance for anyone living in a humid environment. They can bring great benefits to both your health and the safety and cleanliness of your home. Buying the right dehumidifier size is important as the wrong size may not dry out your living environment effectively. Hopefully, with our guide above, you will be better equipped to purchase the right dehumidifier size for each room and understand how and why you need certain sizes for different rooms and conditions.

With the Best of Machinery guides, you can be sure that you are making a good decision and finding the perfect dehumidifier for your home, regardless of the size of the house you live in or the level of moisture in the environment.

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