Best Crawl Space Dehumidifiers: 2021 Reviews

Today we’re reviewing the best crawl space dehumidifiers to keep your home both moisture and mildew-free! Moisture, especially in a crawl space, can be a HUGE issue depending on your area. Left unattended, this moisture can produce large amounts of mold that can spread throughout your home.

To figure out which dehumidifier is best for your crawl space, we took into consideration a few things including: the coverage area, whether there is a built-in pump, how many pints it can remove per day, and much more!

Do I Need a Crawl Space Dehumidifier?

As a home or business owner, you may be asking, “is a crawl space dehumidifier really necessary?” The short answer is yes. However, a better answer is that your home’s crawl space or basement can often be poorly ventilated. This often occurs because of enclosed conditions and can result in a slow buildup of mold, mildew, bacteria, and other contaminants in your crawl space over time.

To help mitigate the issue of mold, mildew, bacteria, and high levels of moisture throughout the enclosed spaces in your home or business, you’ll want to invest in a well-performing dehumidifier from a reliable brand. Whether you are a home owner or realtor, our crawl space technicians can help point you in the right direction. Our best crawl space dehumidifiers we recommend include top-notch products from AlorAir, Aprilaire, and Dri-Eaz:

Questions on Dehumidifiers?

2021’s Best Crawl Space Dehumidifiers

Below are the top 5 best crawl space dehumidifiers that Fresh Air Technologies recommends. These powerful dehumidifiers work for residential, commercial, and industrial purposes:

DehumidifierProduct NamePricingPints Per DayCoverage Area
AlorAir 55-Pint Dehumidifier
Best for Small Areas 

See Details
$699.6655 Pints1,300 Sq. Ft.
AlorAir LGR 180 Pint Commercial Dehumidifier with Pump
Best Crawl Space Dehumidifier with Pump 

See Details
$849.11180 Pints2,300 Sq. Ft.
AlorAir Sentinel HDi90 Crawl Space Dehumidifier
Best Heavy Duty Dehumidifier 

See Details
$1,047.1190 Pints2,600 Sq. Ft.
Aprilaire 1830 Crawl Space Dehumidifier
Most Compact Dehumidifier

See Details
$1,271.3870 Pints3,800 Sq. Ft.
Dri-Eaz Revolution LGR Commercial Dehumidifier with Pump
Powerful Commercial-Grade Dehumidifier

See Details
$2,169.0080 pints7000 Sq. Ft.

AlorAir 55-Pint Dehumidifer

Best for Small Areas ($699.66)

The 55-Pint AlorAir dehumidifier may be the lowest in price, but it is quite exceptional in terms of quality. Overall, it is the best dehumidifier on the market right now for small areas in your home or business. Introducing the 55-Pint AlorAir dehumidifier!

AlorAir 55 Pint Dehumidifier Summary

This Energy Star-certified dehumidifier effectively removes moisture from smaller enclosed spaces. Use up less energy, and as a result, less money on your energy bill with the AlorAir 55-pint! This dehumidifier works for either home or commercial use.

This smaller, but very powerful dehumidifier remove 55s pints a day at AHAM condition, 120 Pint at saturation, up to 1,300 sq. ft, fit.


  • Energy-Star certified
  • Best choice for small spaces
  • Uses up less energy
  • Removes 55 pints a day
  • Works under cold temperatures
  • Internal corrosion protection


  • Small size may not work for all spaces

Featuring an automatic defrost capability, this dehumidifier can work effectively under cold temperatures (36 degrees Fahrenheit), so if frost develops on the coils, an automatic defrost cycle runs to avoid frost build-up and subsequent issues that may result. The automatic defrost makes the products continually run with stopping during the defrosting process, aiding to better usage of energy and improving overall product life.

This dehumidifier is also equipped with internal corrosion protection, an advanced technology to help minimize corrosion and freon leakage. This helps to lessen the chance of the coils developing corrosion.

AlorAir LGR 180 Pint Commercial Dehumidifier with Pump

Best Crawl Space Dehumidifier with Pump ($849.11)

Currently the best dehumifier on the market with a pump, this red AlorAir dehumifier with a 180 pint capacity comes complete with a digital humidistat control, a timer, and a built-in condensate pump. It is able to fit easily into small spaces.

AlorAir LGR 180 Pint Dehumidifier Summary

This is a highly efficient dehumifier with a water damage restoration option. The operating temperature range for this dehumifier is 33.8-104 degrees Fahrenheit. The AlorAir LGR draws 5.62 amps on a 115V power supply for excellent energy efficiency.


  • 180-pint capacity
  • Digital humidistat control
  • Timer
  • Built-in condensate pump
  • Ideal dehumidifier for small spaces
  • Waterproof design
  • Great dehumidifier for commercial use


  • Heavy

This unit also features excellent waterproof design. With auto defrosting, this dehumidifier will quickly clear ice from the coil under a minimum operating temperature of 33.8℉. It is an excellent choice for residential and commercial use alike!

AlorAir Sentinel HDi90 Crawl Space Dehumidifier

Best Heavy Duty Dehumidifier ($1,047.11)

When it comes to heavy-duty performance, this AlorAir crawl space dehumidifier is it! An Energy Star-certified dehumidifier, it quickly and effectively removes moisture with less energy than many other comparable dehumidifiers.

AlorAir Sentinel HDi90 Dehumidifier Summary

Using the Sentinel HDi90 will help you save money so that you don’t have to rack up your energy bill. With this AlorAir Sentinel dehumidifier, you can effectively remove 90 pints per day at AHAM condition, 198 Pint at saturation, and up to 2,600 sq. ft of enclosed space.


  • Powerful, heavy-duty dehumidifier
  • Energy-Star certified
  • Removes 90 pints per day
  • Automatic defrost
  • Save 30% on energy!
  • Remove moisture effectively and with less energy when compared with other dehumidifier brands


  • Heavy dehumidifier

The design of the Sentinel HDi90 includes a heavy duty condensate pump. The pump keeps the dehumidifier running smoothly by pushing out any retained water out consistently.

It also features automatic defrost. The automatic defrost capability enables the dehumidifier to work at colder temperatures (i.e. 36 degrees Fahrenheit) without stopping during the defrosting process. This helps to further save energy and keep the unit lasting longer.

This heavy duty dehumidifier is an excellent choice for many applications in domestic, commercial, and industrial use alike. An Energy-Star certified product, it will help to save you money on your utility bill. Investing in an AlorAir dehumidifier will cost you approximately 30% less on average to operate when compared with non-Energy Star dehumidifiers.

Aprilaire 1830 Crawl Space Dehumidifier

Most Compact Dehumidifier ($1,271.38)

The 70-pint 1830 Pro Dehumidifier from Aprilaire is one of the hardiest dehumidifiers around and is the best compact dehumidifier you’ll find anywhere on the market. Effectively keep the humidity levels below 60%, keep carpeting from becoming damp, and maintain the quality of furnishings by minimizing any mold, mildew, odor, termites, structural wood rotting and more.

Aprilaire 1830 - Best Crawl Space Dehumidifiers

Aprilaire 1830 Dehumidifier Summary

Built to last, this Aprilaire unit has corrosion-resistant aluminum coils. This dehumidifier removes up to 9 gallons (or 70 pints) of water each day. No messy water tray to empty – simply use a hose to drain the water.


  • 70-pint
  • Effectively removes moisture with less energy
  • Remove 90 pints per day at AHAM condition
  • Automatic defrost capability


  • High price tag

Dri-Eaz Revolution LGR Commercial Dehumidifier with Pump

Powerful Commercial-Grade Dehumidifier ($2,169.00)

Don’t shy away from the price tag of this powerful commercial dehumidifier. The high price is well worth it, because this commercial dehumidifier brings plenty of high quality features that more than pays for itself. This unit is specially equipped with rugged rotomolded housing, which enables it to withstand virtually any environment.

Dri-Eaz Commercial Grade Dehumidifier - Best Crawl Space Dehumidifiers

Dri-Eaz Revolution LGR Dehumidifier Summary

The Dri-Eaz crawl space dehumidifier features a built-in, programmable humidistat for the individual to set a specific humidity level. Water removal is 12 gallons per day at 80°F/60% RH (AHAM), 17.3 gallons per day at 90°F/90% RH


  • Powerful, commercial-grade unit
  • Rugged rotomolded housing
  • Built-in, programmable humidistat
  • Easy to transport
  • Water removal is 12 gallons per day at 80°F/60% RH


  • Very heavy
  • High price tag

Included also is a 40-foot drain hose, 25-foot electrical cord, 3M HAF high airflow filter, and owner’s manual. It features a digital screen so that environmental temperature and humidity is measured and displayed. Air movement is 121-180 CFM. Additionally, this dehumidifier features a compact design, measuring 17.6″ high x 12.5″ wide x 21.5″ deep.

The Dri-Eaz Revolution LGR dehumidifier also boasts a well-designed control panel, displaying the inlet/outlet temperatures and relative humidity. It even tracks job hours.

Dehumidifier FAQs

Do dehumidifiers work in crawl spaces?

Dehumidifiers are an effective solution to a buildup of moisture in your crawl space or basement. Moisture may not seem like a big deal if it just sits in your crawl space, however, consider that it will permeate throughout the walls and floorboards of your home, causing mold and other issues. Using a dehumidifier will help to keep the moisture levels in your home in check.

What kind of dehumidifier do I need for my crawl space?

The type of dehumidifier you choose will depend on the square footage of your crawl space. For example, if you have a crawl space with a square footage of 300 feet, you will want to purchase a 20-30 pint sized dehumidifier. Likewise, for a 500 square foot crawl space, you’ll need to invest in a 25-40 pint dehumidifier.

How much is a dehumidifier for a crawl space?

As we have seen, the cost of your dehumidifier will depend on the square footage your crawl space is, whether you need the dehumidifier for residential, commercial, or industrial purposes, and how much you need it to draw moisture. For a high quality dehumidifier, you can expect to pay anywhere between $700 and $2,200.

Can you put a regular dehumidifier in a crawl space?

The short answer is no. The truth is that a regular dehumidifier will remove some moisture, but will not remove all of it. You want to take moisture buildup in your home seriously. To prevent excessive moisture and poor air quality, you’ll want to purchase a dehumidifier that is well-built, powerful, and thoroughly removes moisture from your home, commercial, or industrial building.

Best Crawl Space Dehumidifiers: In Summary

In conclusion, the best crawl space dehumidifier for your crawlspace or basement is going to depend on the coverage area required, whether it is for residential or commercial purposes, and the best for pint per day. Our most recommended crawl space dehumidifiers are the ones that are Energy Star-certified, because they help you save up to 30% on energy, lowering your energy bill.

When in doubt, ask a crawl space or basement expert about which dehumidifier to use. Most of these dehumidifiers are suitable for residential, commercial, and industrial applications.

Why Choose Fresh Air Technologies?

Do you need a professional crawl space dehumidifier installation? One of our expert technicians can stop by your home or business to assess your indoor air quality and provide a crawl space dehumidifier installation. Keep your basement, crawl space, and other enclosed areas dry with a high quality dehumidifier. To get started, please give our experts a call today at 704-270-2721.

Knowledge based company with excellent customer service, efficient response and work quality. Loved each tech I worked with, they put human in the definition of being human. Can't stand scripted robotic responses and you won't find it here.
Makhi Mitchell
Makhi Mitchell
00:55 18 Nov 19
Amazing work. Bought a house built in the 60s that had never had ducts cleaned. Before and after pictures blew me away. Crew was so professional. Recommend Highly!
Renee Shumaker
Renee Shumaker
02:32 15 Jul 18
Este lugar me da buenos opciones..
Florencio Solano
Florencio Solano
22:26 17 Aug 17
I recently discovered a mild mold problem in my crawlspace and begin my search for a company to remediate. Fresh Air Tech. seemed to have the best treatment plan for my situation and was the most competitive when it came down to the price. I had the mold removed/sprayed with prevention chemicals, crawlspace cleaned with a new vapor barrier and a dehumidifier installed. I didn't know what to expect never having to deal with this before but I can ensure you these guys do not cut corners and did an excellent job. The cleaning crew (3 guys) arrived about 8AM and were under the house until about 4:45PM cleaning and sanding taking a quick 30 minute lunch break around noon. They returned the next day to install the vapor barrier and to finish cleaning up. The dehumidifier also comes with a monitor that displays the temp and moisture level down in the crawlspace which i thought was pretty cool. Excellent job, thanks again team.
Gary Young
Gary Young
03:16 14 Aug 17
Great company - thanks Neil & team for a job well done!
Carl Zimmerman
Carl Zimmerman
15:31 26 Jun 15
Mike, your page is looking Great!
Geary Morris
Geary Morris
15:10 31 Oct 13

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