Purchasing a new dehumidifier might be a daunting task. It’s easy to become overwhelmed with advice and others telling you what to do.

When buying a dehumidifier, though, it’s critical to ask yourself, “What size dehumidifier do I need?” You’ll get the most bang for your money if you know what size and capacity are appropriate for you.

If you choose the wrong size, you could wind up with a bulky energy hog that’s too noisy to use in the living room. If you select one that is too tiny, though, it may not be capable of dehumidifying your house.

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How Dehumidifiers Work

Dehumidifiers work by sucking moisture from the air and regulating humidity. The wet air is drawn into the dehumidifier by a fan and passed through cooling coils, which employ condensation to remove moisture from the air. The heat recovery system of the dehumidifier then circulates warmer, dryer air back into the room. Some versions collect the water in a detachable drip pan or reservoir, while others circulate it out of the device.

A humidistat, which monitors and controls the relative humidity (rh) in a room, is included in many dehumidifiers. In the summer, a rh of 50 percent is preferred, whereas, in the winter, a rh of 30 percent is perfect.

If excessive humidity is an issue throughout your home, a whole-house dehumidifier may be required. Some are portable, while others are integrated into your HVAC system and may be used as part of it.

Desiccant dehumidifiers work by utilizing chemicals rather than condensation to remove moisture from the air. They are quieter and produce lower humidity levels than other dehumidifiers, but they have a smaller capacity, a detectable odour, and are less cost-effective.

Water Damage, Mold, and Your Health

Dehumidifiers aid in the reduction of excess moisture and water damage in the home, making breathing easier. Dehumidification also aids in the prevention of mould, mildew, and dust mites from spreading throughout the house. Given that mould is drawn to many common construction materials, such as ceiling tiles, wood, and wood products, this is an important preventative precaution.

Exposure to wet, mouldy surroundings, according to the CDC, can cause a number of health concerns, ranging from minor symptoms like a stuffy nose or wheezing to more significant symptoms like fever, shortness of breath, and the development of asthma in children.

How Are Dehumidifiers Sized?

The capacity of a dehumidifier refers to how much moisture it can remove in a 24-hour period. Pints per day, or PPD, is another term for this. Different versions are available, with the most popular capacities being 30, 50, and 70 pints.

There are, however, smaller devices that can remove 20 pints and even larger units that can remove more than 100 pints. Furthermore, the capacity of a dehumidifier will give you an indication of how much room it can cover. You can easily locate a suitable dehumidifier if you know the square footage of the dehumidifier as well as your region.

Sizing Guide

We’ve put up an easy-to-understand chart to help you size your dehumidifier quickly:

Conditions300 – 500 Sq.Ft.700 – 1,000 Sq.Ft.1,500 – 2,500 Sq.Ft.
Moderately Damp10-pint20- or 40-pint50-pint
Very Damp20- or 30-pint30- or 50-pint50- or 60-pint
Wet40- or 50-pint50- or 60-pint70-pint
Extremely Wet50-pint60-pint70- or 100-pint

How to Choose the Right Type of Dehumidifier

It’s time to measure your room or residence so that you have an approximate estimate of what capacity dehumidifier you’ll require. You may already know the precise square footage of your home, in which case you’re almost done. Here’s how to measure a space for people who aren’t sure:

In feet, measure the length of the room.
In feet, measure the width of the room.
To get the square footage, multiply the two measures together.

It’s not always easy to predict where the dehumidifier will be utilised in the future. Some people purchase one for a specific purpose, such as a basement. The dehumidifier, on the other hand, could be required elsewhere. If you want to move the dehumidifier across rooms, make sure you measure the biggest area first.

Here are a few examples to assist you figure out what sort of dehumidifier would be best for you.

Large Spaces More Than 2,500 Square Feet

You need a whole-house dehumidifier if you frequently struggle with humidity and see mould or smell musty aromas. Dehumidifiers for the entire home are connected to your HVAC system. They operate by removing excess moisture from the air before it reaches your house.

Dehumidifiers for the whole house are meant to cover areas of up to 3,000 square feet or more. The initial cost is more than portable units, but they are less expensive in the long term. Furthermore, because it is simpler to chill dry air, installing a whole-house dehumidifier will help your AC function more efficiently.

Small Spaces Between 100 and 250 Square Feet

A big 70-pint dehumidifier might be tough to fit into a tiny space. As a result, a small dehumidifier is recommended.

Depending on the type, mini dehumidifiers can cover anywhere from 100 to 300 square feet. When used in a suitably sized room, they operate softly yet efficiently.

Because of their small size and ease of installation, mini dehumidifiers are popular in bedrooms, children’s rooms, and nurseries. Regrettably, most of them have a tiny reservoir that can only store a few quarts. When the tank is full, most small dehumidifiers have an auto-shutoff feature that turns the device off.

Mini dehumidifiers are popular in bedrooms because they are very quiet. They can’t fit a loud compressor because of the small size, therefore they rely on thermoelectricity instead.

Cool Environments

If you live in a chilly climate, you’ve undoubtedly been told not to buy a dehumidifier. Regular refrigerant dehumidifiers will not operate in cold weather because the coils will freeze over.

Desiccant dehumidifiers, on the other hand, are a solution to your humidity problem. A rotor loaded with sheets impregnated with desiccant material is used in a desiccant dehumidifier. When air is pulled in by a fan, it travels across the rotor, which absorbs moisture.

Desiccant dehumidifiers are also more quieter than compressor dehumidifiers since they don’t have a compressor. They’re also more efficient and effective in drying air that’s already dry.

In colder temperatures, refrigerant dehumidifiers will not work. When the temperature goes below 60 degrees Fahrenheit, the coils are at risk of producing ice. This can waste electricity and, if left unattended, harm the dehumidifier from the inside.

Hot Environments

If you reside in the south, where humidity levels never seem to drop below 70%, you’ll need a powerful dehumidifier. Nothing beats a refrigerant model in this sort of atmosphere. These are extremely effective in removing huge amounts of moisture and can operate at greater temperatures than desiccant models.

Air is drawn in by a fan and then cooled on coils in refrigerant dehumidifiers. As it cools and warms, the refrigerant liquid is pushed through the system, changing between gas and liquid form.

How to Choose the Capacity of the Dehumidifier

Knowing how much area your dehumidifier needs to cover is only one part of the equation. Another factor to consider is the humidity level in your home or individual space. Here are some indicators to look for to help you figure it out:

Moderately damp: If your residence or area seems clammy or musty, it’s moderately damp. This isn’t something that happens all year, but it does when the weather becomes hot.
Very wet: Your home is classified as very damp if you frequently detect a pronounced musty odour and it feels moist. You could even notice damp patches on the walls or flooring in this instance.

Wet: You may notice that your home is “sweating,” which appears as water beads on the walls or flooring. Your home’s rooms may also be damp or smell damp all of the time.

Really wet: If the floor is extremely wet, you will see standing water on it. A leak or other water damage might be the blame. The source must be fixed in this situation.

To determine the precise humidity levels, many homes utilise a humidity metre. This is effective, but it isn’t always required. You can easily obtain an overview of the humidity condition in your house by comparing your area to the points above.

Follow the steps below to get a bit more assistance.

Moderately Damp Space

You won’t need a large, heavy dehumidifier in a moderately moist room. Instead, for big rooms of about 2,500 square feet, we propose a 30-pint dehumidifier. This will work well in any room ranging from 1,000 to 2,500 square feet without being overly loud or big.

A 10- or 20-pint dehumidifier is recommended for smaller regions of 500 square feet to 1,000 square feet. These are more compact and may easily fit into tight areas. Try a desiccant unit for a more tranquil environment as a bonus if you want to save some electricity.

Very Damp Space

You’ll need a dehumidifier that can remove more moisture from particularly damp rooms, which means going with a higher capacity.

A 50-pint unit is recommended for big areas between 1,000 and 2,500 square feet. This will be able to swiftly extract a large amount of moisture and will not become overwhelmed, leading it to use more energy.

A 30-pint unit is recommended for smaller spaces between 500 and 1,000 square feet. Due to the damper environment, a greater capacity is required. Fortunately, 30-pint units are still tiny enough to fit in tight locations.

Wet Spaces

You’ll need a powerful dehumidifier if you notice water beads on the walls or flooring. As a result, for regions of 1,000 to 2,500 square feet, we propose a 50- or 70-pint dehumidifier. These sizes will make more noise, but they will be able to remove moisture more quickly and effectively.

We propose a 30- or 50-pint unit for smaller areas between 500 and 1,000 square feet. Although a 50-pint is larger, it’s critical to get the moisture out to avoid mould or mildew.

Extremely Wet Spaces

It’s time to bring in the heavy guns if you see standing water in various parts of your home. To avoid water damage and mould, get the moisture out and dry the room as soon as possible.

If the area isn’t dried up, mould will start to form within 24 to 48 hours. It may grow under carpets, under floors, and even behind walls.

Your house might be recuperating after a flood or a major plumbing leak. An LGR dehumidifier is useful in this situation. Low-grain refrigeration is abbreviated as LGR. It has dual cooling, which helps to keep air temperatures lower, making drying simpler.

If LGR units are too much for you, a 70-pint dehumidifier for big areas is another option. We recommend a 50-pint for smaller areas.

Other Factors to Consider

Many factors might lead to increased indoor humidity, therefore they must be addressed as well. Listed below are a few examples:

Environment with high relative humidity: If you live in a humid climate, the relative humidity indoors will be greater. As a result, it’s suggested that you add 10 quarts of water to your dehumidifier. To compensate for the high humidity, if you pick a 50-pint, go for a 60-pint instead.

If you live in a smaller apartment or townhouse, the washer and dryer (perhaps both) are likely to be near to your living area. Add 5 quarts if you want the humidity to climb somewhat. So, instead of a 10-pint unit, consider a 15- or 20-pint unit.

Will the dehumidifier be in the kitchen? The humidity in the kitchen might grow while we prepare our favourite foods. If you need a dehumidifier in the kitchen, pour 5 quarts of water to guarantee it can handle the condensation.

AC: Because air conditioners and dehumidifiers function in similar ways, they can complement each other. If you use the air conditioner a lot in the summer, you can save money by getting a smaller dehumidifier. To produce a dry and cool environment, the two appliances will operate together.

Pets: If you have pets, especially a large fuzzy dog-pal, it’s critical to keep the humidity low. Pets have a harder time cooling off in the summer because of their additional fur, and they are at danger of heat stroke (5). As a result, a big dehumidifier or whole-house dehumidifier is recommended. This will provide a relaxing environment for your pets.

Frequently Asked Questions

Bottom Line What Size Dehumidifier Do I Need

Dehumidifiers come in a variety of sizes, making it difficult to choose the perfect one for your needs. The capacity of a dehumidifier is measured in pints, which indicates how much moisture it can remove. The most common sizes are 30-, 50-, and 70-pint. However, 20-, 40-, 45-, and 100-pint containers are also available.

You must examine the size of the area as well as the circumstances within before deciding on size. You may simply calculate the square footage by multiplying the room’s length and breadth. You should also examine how humid your house or environment is before making a decision.

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