Best Crawl Space Dehumidifier of 2022

Is a crawl space dehumidifier really necessary? 

The environment within your crawl spaces is often poorly ventilated due to enclosed conditions. Mold, mildew and other contaminants such as bacteria can quickly build-up, running the risk of spreading throughout your home.

Mold can cause mild or severe health effects depending on the individual’s sensitivity. Nevertheless, it’s crucial to keep it away.

Homeowners will commonly use dehumidifiers within the house to keep moisture levels low. But what about the crawl spaces? By installing the best crawl space dehumidifier for your home, you can improve the home environment for you and your family.

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Product Comparison Table

Product Image of the ALORAIR Commercial Dehumidifier with Pump Drain Hose, 180 Pint Large Capacity Crawl Space Dehumidifier for Water Damage Restoration, Basements Warehouse & Job Sites, 5 Years Warranty, Red
Best With Pump
AlorAir LGR Dehumidifier
  • Innovative design
  • Easy – replace filter
  • Built-in pump
Product Image of the ALORAIR Basement/Crawlspace Dehumidifiers 198 PPD (Saturation), 90 Pints (AHAM), 5 Years Warranty, Condensate Pump, Auto Defrosting, Rare Earth Alloy Tube Evaporator, Remote Control (optional)
Best 90-Pint
AlorAir 90-Pint Dehumidifier
  • Effective
  • Protected coils
  • Defrosting function
Product Image of the ALORAIR Basement/Crawl Space Dehumidifiers Removal 120 PPD (Saturation), 55 Pint Commercial Dehumidifier, Energy Star Listed, 5 Years Warranty, Auto Defrosting, cETL, Optional Remote Monitoring
Best for Small Areas
AlorAir 55-Pint Dehumidifier
  • Compact
  • Internal corrosion prevention
  • Odor control
Product Image of the Aprilaire E70 Pro 70 Pint Dehumidifier for Crawl Spaces, Basements, Whole Homes, Commercial up to 2,800 sq. ft.
Most Compact
Aprilaire E70 Pro Dehumidifier
  • Compact
  • Easy to use
  • Low-maintenance
Product Image of the Dri-Eaz-F412 LGR 7000XLi Commercial & Portable Dehumidifier with Pump - Up to 111 L water removal per day,Blue
Best for Large Areas
Dri-Eaz 7000XLi LGR
  • Effective
  • Compact
  • Humidistat

Why Use Crawl Space Dehumidifiers?

The crawl space is a notoriously damp or moist area, but it shouldn’t be. Moisture and dampness will eventually damage the structure of your house. Mold and mildew are also more likely to grow when the conditions become damp.

If mold begins to grow in your crawl space, it can quickly spread to your home. This can quickly become a health risk.

Mold can cause a variety of symptoms and reactions, depending on how sensitive you are. Allergic symptoms and respiratory issues such as asthma are among the most common effects (1).

The crawl space usually becomes damp or moist due to leaks or other water damage, for instance, caused by flooding. A dehumidifier is the best way to keep the crawl space dry. However, leaks or puddles must be fixed first. No matter how strong your dehumidifier is, it won’t fix a leaking pipe or remove standing water.

After fixing what is causing the high levels of humidity, you can find a good dehumidifier and install it within your crawl space.

Finding the Best Crawl Space Dehumidifiers

Due to the compromised space of the crawl space, you can’t simply install any old dehumidifier. There are a few crucial points to consider to ensure you get the best crawl space dehumidifier for you.


There isn’t a lot of room in the crawl space of a house, so it can be tricky to fit anything down there. This is why it’s crucial to choose a unit specifically made for these locations (crawl space, attic, basement, etc.).

As you’re searching for the perfect one, you’ll surely notice a certain shape being used over and over again. That’s right, rectangular is the way to go for a crawl space dehumidifier. This shape allows the unit to be squeezed into nearly any tight space without compromising power.

Take Note

Before settling on a model, measure the crawl space of your house to ensure you find a good fit.
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Ground Level

With crawl space dehumidifiers, it’s important that the floor or ground is level. This will ensure proper drainage as the machine extracts water vapor from the air. If your ground isn’t level, try your best to fix it before installing the dehumidifier.

Area Coverage

Area coverage is another important point to consider. Most crawl space dehumidifiers will be able to cover anything above 1,000 square feet. However, it’s important to note that the units covering larger areas tend to be bigger in design.

When choosing a unit, consider the size of the crawl space and how humid it is. Units with more extensive coverage will also use more power, so weigh your needs carefully.


Dehumidifiers are generally categorized by how many pints of water they can remove per day or per 24-hour cycle. These can range from a minor 10-pint to a major 90-pint and more.

In a crawl space, having a high-performing dehumidifier is important. We highly recommend that you choose a 50-pint or above for this area. This will ensure the machine is working hard at keeping the area dry.


Even the best crawl space dehumidifier isn’t that impressive when it comes to features, modes or settings. However, they should be equipped with a few basics:

  • Humidistat: A humidistat is an excellent feature to have on your dehumidifier as it gives you more control. You can set your preferred humidity levels; most units will automatically turn off when it’s reached. Some will even turn back on when the levels change again.
  • Defrost: During the colder months of the year, the crawl space can become rather frigid. This can be fatal for the coils inside the dehumidifier as they risk freezing over. If you live in a cold area, a defrost function is a must — this will keep the internal parts warm and keep the machine running.
  • Remote control: Having a remote control for your crawl space dehumidifier can make life much simpler. It’s highly inconvenient having to enter the crawl space to operate the dehumidifier.This feature isn’t as common, but many units have the option if preferred.

The Best Crawl Space Dehumidifiers of 2022

As we were searching for the best crawl space dehumidifiers, we made sure the performance was up to scratch. We researched several top options and read multiple customer reviews. Due to the limited space, we also ensured that all of the items on our list are compact to fit.

1. AlorAir LGR 85-Pint Dehumidifier With Pump

Best Crawl Space Dehumidifier With Pump

If you have a significant amount of moisture within your crawl space, this heavy-duty dehumidifier is for you. The AlorAir LGR is incredibly effective and was specifically designed to extract high amounts of water.

It comes with a built-in condensate pump to help with drainage and can remove up to 85 pints of water a day. The unit is covered by an impressive five-year warranty and is available in several different colors.

Photo of the AlorAir LGR 85-Pint Dehumidifier With Pump

The Pros

Innovative Design

AlorAir has taken the LGR to a whole other level when it comes to design. It was designed to combat the aftermath of leakage and flooding to help restore your home. The body of the dehumidifier can be submerged in water completely without damage due to the rubber strip that seals the circuit board.

Another smart thing about the design is the fact that it’s stackable. This makes it super easy to store, transport or set up along with other units.

Easy to Replace Filter

The MERV 8 filter is simple to locate and easily slides out when replacement is needed. It’s also washable, so when you feel like the unit is less effective, take it out and give it a rinse with warm water. Make sure it’s fully dry before sliding it back into place.

Built-In Pump

It can sometimes be difficult to locate the dehumidifier close to a drain, which means you’ll have to rely on the reservoir. However, if you’re dealing with a significant amount of moisture, you’ll be emptying it many times.

Luckily, this dehumidifier comes with a built-in condensate pump with a 20-foot lifting distance. This enables you to drain from anywhere.


One fatal flaw with dehumidifiers is a Freon leak that will damage the coils. However, AlorAir has coated its coils with epoxy, protecting them from any damage or leaks.


This dehumidifier is easy to use thanks to the bright LED display. You can easily see operating settings as well as humidity levels in the inlet and outlet. The 19.6-foot power cord conveniently wraps up and hangs on the unit. Thanks to the length, there’s no need for extension cords.

The Cons


Weighing in at 78 pounds, the AlorAir LGR isn’t the most portable unit. It’s very heavy and without wheels, it’s tough to move around.

Additional Specs

Dimensions 22.8 by 13.7 by 17.3 inches
Weight 78 pounds
Area Coverage 2,300 square feet
Pint Per Day 85 pints
Built-In Pump Yes

2. AlorAir 90-Pint Crawl Space Dehumidifier

Best 90-Pint Crawl Space Dehumidifier

For very humid crawl spaces, this 90-pint dehumidifier from AlorAir is an excellent choice. It removes up to 90 pints of moisture a day, so your crawl space will stay dry and mold-free.

The dehumidifier comes with a few great features such as a built-in pump, protected coils and a defrost system. If you wish, you can purchase a remote control separately that you can install anywhere in the house.

You’ll get a five-year warranty and additional service if needed.

Photo of the AlorAir 90-Pint Crawl Space Dehumidifier

The Pros


This dehumidifier will remove up to 90 pints of water a day. It’s very effective and will keep your crawl space dry and mold-free. As an added feature, it’s equipped with a condensate pump. This makes draining a breeze since you don’t have to worry about how you place the unit.

Protected Coils

AlorAir has coated the coils with epoxy. This will effectively protect the coils from leakage and damage and will help the unit last for longer. There’s also a high-efficiency rotary compressor, which ensures the unit’s low-cost effectiveness.


Although this type of dehumidifier won’t be standing in your living room, the noise level is still important. Luckily, the 90-pint dehumidifier is very quiet. It’s not completely silent, but it won’t cause vibrations that might be bothersome.


Thanks to the four adjustable wheels, it doesn’t really matter that it weighs over 50 pounds. You can easily roll it across the floor to get it into position, instead of having to drag it.

Defrosting Function

During the colder months of the year, the coils run the risk of freezing over and breaking. Fortunately, this dehumidifier is equipped with a defrosting function that will keep the coils frost-free even on the coldest days.


Despite being a 90-pint dehumidifier, it’s surprisingly compact. It easily fits inside small crawl spaces and is a breeze to store.

The Cons

The Pump Isn’t Secured

Despite the built-in condensate pump being a handy feature, it doesn’t work for everyone. Some customers reported that they received their unit with the pump poorly secured inside.

Additional Specs

Dimensions 23.2 by 15.2 by 17.7 inches
Weight 57.3 pounds
Area Coverage 2,600 square feet
Pint Per Day 90 pints
Built-In Pump Yes

3. AlorAir 55-Pint Crawl Space Dehumidifier

Best Crawl Space Dehumidifier for Small Areas

For compact spaces, we highly recommend this 55-pint dehumidifier. Thanks to its shape and size, it’s easy to fit in compromised spaces. This makes it excellent for crawl spaces or basements.

It will effectively remove 55 pints of water per day and cover vast areas of up to 1,300 square feet. You get a few smart features such as automatic shutoff once your desired humidity levels are reached.

You get the option of purchasing a separate remote control, which can be installed anywhere in the house.

Photo of the AlorAir 55-Pint Crawl Space Dehumidifier

The Pros


If you don’t have much room to spare in your crawl space, this dehumidifier will make an excellent fit. It’s compact and rectangular, which makes it easy to fit in tight spaces.


You can easily remove moisture from spaces of up to 1,300 square feet. We also love the convenience you get with this compact device. After installing it, you adjust your desired humidity levels and the unit will run its continuous 24-hour cycle until results are reached.

You don’t have to worry about drainage as the unit will do it all automatically once installed correctly. Once your desired humidity levels are reached, the unit will automatically turn off to save energy.

Odor Control

Unlike many other dehumidifiers, you also get an odor-control filter. This unit is equipped with a G3 filter that effectively captures coarse dust particles. When needed, the filter is easily removed by sliding it out of the pocket and rinsed to clean. Once it’s completely dry, you can slide it right back into place.

Internal Corrosion Prevention

To minimize the risk of internal damage due to corrosion or rust, AlorAir has coated the coils in epoxy. This will effectively prevent Freon leakage and keep the coils and machine running smoothly. Even if you live in a very humid environment, the internal parts of the unit are protected.


Running a dehumidifier in cold environments isn’t ideal since the coils will have trouble maintaining their heat and they might freeze. As such, having a defrost function on your dehumidifier is crucial. This one uses a hot gas valve defrosting system (HGV), it enables the unit to run in temperatures as cold as 36 degrees Fahrenheit.

The Cons

No Pump

Unlike the previous model on our list, this dehumidifier doesn’t come with a built-in condensate pump. This will, unfortunately, limit installation as the drain point has to be at floor level to allow proper drainage.

Additional Specs

Dimensions 19.2 by 12.2 by 13.3 inches
Weight 57.3 pounds
Area Coverage 1,300 square feet
Pint Per Day 55 pints
Built-In Pump No

4. Aprilaire E70 Pro Crawl Space Dehumidifier

Best Compact Crawl Space Dehumidifier

If you want a low-maintenance dehumidifier, this is your guy. It conveniently drains continuously when installed correctly. This means you won’t have to worry about trays or reservoirs filling up.

We like the rectangular shape that makes it easy to fit into tight spaces.

You get a five-year warranty to help ease your mind if anything breaks or malfunctions.

Photo of the Aprilaire E70 Pro Crawl Space Dehumidifier

The Pros


This dehumidifier is perfect for areas such as crawl spaces. It has a rectangular shape that makes it easy to fit where a cumbersome unit wouldn’t.

Easy to Use

Getting started is as simple as it can get. Find the right spot for it where it’s leveled and over a drain, or attach the included hose. Plug the unit into a nearby outlet and set your desired humidity levels. The machine will quickly get to work and you’ll soon notice a difference.


Maintaining this dehumidifier is a breeze. There’s no need to worry about emptying a tray or reservoir since the unit will continuously drain through the hose. The filter can easily be removed, washed and dried before placing it back into the unit.

The Cons

No Pump

Because there’s no built-in pump, how you install the dehumidifier is crucial. It has to be level and near or above a drain.

Additional Specs

Dimensions 33 by 13.04 by 12.88 inches
Weight 56 pounds
Area Coverage 2,800 square feet
Pint Per Day 70 pints
Built-In Pump No

5. Dri-Eaz 7000XLi LGR Commercial Dehumidifier

Best Crawl Space Dehumidifier for Large Areas

Available space within the crawl space is limited, so large dehumidifiers simply won’t fit. If you have a large area to cover but limited space to fit a dehumidifier, this one will suit you. It can cover an incredible 26,000 cubic feet and will extract a significant amount of water.

We love its size since it’s easy to carry wherever it’s needed. The hose and power cord can be stored on the unit when not in use.

Photo of the Dri-Eaz 7000XLi LGR Commercial Dehumidifier

The Pros


This commercial-grade dehumidifier might be small, but it packs a huge punch. It will effectively extract up to 235 pints of water per day, similar to large units. Large areas pose no challenge as it can cover a whopping 26,000 cubic feet.


The compact size enables you to install it anywhere it’s needed. You can easily place it in even the tightest locations such as crawl space, attic or basement. The size and effectiveness make this dehumidifier the perfect option for locations where large units simply can’t fit.


This dehumidifier comes equipped with a built-in humidistat, which allows you to better control your desired humidity levels. After setting the unit up, simply set the humidistat to the humidity levels you feel comfortable with.

The Cons


Unfortunately, this unit can be quite loud and often creates a humming sound. This can be bothersome, especially if it’s installed in a crawl space near a bedroom.

Additional Specs

Dimensions 20 by 20 by 33.5 inches
Weight 107 pounds
Area Coverage 26,000 cubic feet
Pint Per Day 235 gallons
Built-In Pump Yes

Crawl Space Dehumidifier Comparison Chart

Product Best Dimensions Weight Area Coverage Pint Per Day Built-In Pump
AlorAir LGR Dehumidifier With Pump 22.8 x 13.7 x 17.3″ 78 lbs 2,300 sq ft 85 pints Yes
AlorAir 90-Pint Dehumidifier 90-Pint 23.2 x 15.2 x 17.7″ 57.3 lbs 2,600 sq ft 90 pints Yes
AlorAir 55-Pint Dehumidifier Small Areas 19.2 x 12.2 x 13.3″ 57.3 lbs 1,300 sq ft 55 pints No
Aprilaire E70 Pro Dehumidifier Compact 33 x 13.04 x 12.88″ 56 lbs 2,800 sq ft 70 pints No
Dri-Eaz LGR 7000XLi Dehumidifier Large Areas 20 x 20 x 33.5″ 107 lbs 26,000 cu ft 235 gal. Yes

Improving the Conditions

The crawl space might be the last area you’d think needed a dehumidifier, but it’s actually important. Keeping the crawl space of your house dry and damp-free is crucial since any moisture can cause various issues. Mold and mildew are common problems that not only pose a risk to the structure but also your health.

When searching for the best crawl space dehumidifier, you must consider the size of the unit to ensure it will fit. Consider how powerful the unit should be to ensure you get the best bang for your buck.

Headshot of Matthew Sullivan

About the Author

Matthew Sullivan

Matthew is a freelance writer with several years of experience in DIY and HVAC. For as long as he can remember, Matthew has always found great pleasure in taking things apart and learning how to put them back together.