8 Best Dehumidifiers For Crawl Space | Buying Guide 2021

Best Dehumidifiers For Crawl Space

Best Crawl Space Dehumidifier

You may believe that you don’t need to worry about humidity because your home has a crawl space under its foundation. However, this type of space is primarily concerned with creating an emotional distance between your home and the damp soil below; it functions as a barrier and not a container for humidity. In addition, you will also be able to have easier access to your house’s plumbing system via here. To search for the right product less overwhelmingly, we have gathered together all of the available information and made a list of the 8 best dehumidifiers for crawl space. Also, check out the more in-depth analysis discussed below. We applied a fair process to find the strengths and weaknesses of each model. 

Mold growth and other harmful problems can be prevented by adjusting the humidity levels in your crawl space. The air in your home crawlspace region will be healthful if the humidity level is kept at 55 percent.

In a Hurry? Check out our top 3 picks for the best dehumidifiers for crawl space.

Editor’s Choice
ALORAIR Basement Crawlspace Dehumidifier

  • 2600 Square Feet
  • 90 pints
  • 5 Years Warranty
Runner Up
Aprilaire 1830Z Pro Dehumidifier

  • 5,200 Square Feet
  • 95 Pints
  • Made in USA
For Large Spaces
DRI EAZ F413 Revolution LGR Dehumidifier

  • 7000 Square Feet
  • 80 pints
  • High Airflow Filter

How to Pick the Right Dehumidifier Size

If you want to keep your home dry and prevent mold growth, you’ll need to get a unit that’s the right size. We don’t mean the unit’s physical dimensions when we say “size,” but it goes hand-in-hand with the fact that larger dehumidifiers work on larger ones than smaller ones. What matters is its processing capacity. Some of the dehumidifiers on this list have a capacity of 70 pints per day, which is the quantity of moisture that can be removed from the air per day.
When determining the capacity, two factors must be considered: the size of the crawl space and how damp or humid the crawl space air is. For a moist crawl space and a given area size, here’s a simple reference to what capacity dehumidifiers you’ll need:

Dehumidifier Sizes Chart

The dehumidifiers we looked at are suitable for rooms ranging from 3,000 to 4,500 square feet.

Benefits of Using a Dehumidifier in Your Crawl Space

Installing the best quality dehumidifier in your crawl space region is the best approach to regulate relative humidity levels. Here are some of the advantages of using a crawl space dehumidifier.

  1. Maintains your home’s stability and structural integrity.
  2. Insect and rodent infestations are no longer a problem.
  3. Allergy triggers that cause respiratory problems are eliminated.
  4. Improves indoor air quality.
  5. Reduces energy costs.
  6. Mold, mildew, and dust mites cannot develop in this environment.
  7. Reduces odors and unpleasant odors.
  8. Condensation and visibility difficulties on the window area are reduced.
  9. Prevents old electronic gadgets from rusting.
  10. Protects your priceless possessions from harm.

With that being said, let’s look at the top crawlspace dehumidifiers on the market.

Read Also: Best dehumidifier for living room

List of 08 best Best Crawl Space Dehumidifiers

Image Product Feature Price
Editor’s Choice
ALORAIR Basement Crawlspace Dehumidifier
Condensate Pump, Auto Defrosting, Rare Earth Alloy Tube Evaporator, Remote Control, 198 PPD (Saturation), 90 Pints (AHAM), 5 Years Warranty. Check On Amazon
Runner Up
Aprilaire 1830Z Pro Dehumidifier
Manufactured in the U.S.A. Corrosion-resistant aluminum coils. Remove up to 12 Gallons (95 pints) of water per day. Automatically starts dehumidification when humidity above target is sensed. Check On Amazon
For Large Spaces
DRI EAZ F413 Revolution LGR Dehumidifier
Displays the inlet/outlet temperatures, relative humidity and tracks job hours. 12 gal/day at 80°F/60% RH (AHAM), 17.3 gal/day at 90°F/90% RH. Check On Amazon
Budget Pick
RINKMO 296 PPD Commercial Dehumidifier
296 PPD, 37 Gallons Heavy Duty Industrial Water Damage Restoration Dehumidifier with 3.17 Gal. Maximum moisture extraction of up to 296 pints per day (143 PPD AHAM). Check On Amazon
COLZER 212 Pints Crawl Space Commercial Dehumidifier
Humidity Control for up to 8,000 sq ft Basements, Water Damage Storage. With Pump and Drain Hose 120 Pints/Day (AHAM). CD120P with 353 CFM airflow rate removes up to 212 pints of moisture per day in saturated conditions. Check On Amazon
ALORAIR Commercial Water Damage Restoration Dehumidifier
Remove 180PPD at Saturation condition. Range of 33-105 degrees F, draws 5.62 amps on a 115V power supply for energy efficiency, the huge capacity of 85 PPD at AHAM. Check On Amazon
Santa Fe Compact70 Dehumidifier
70 Pints or 8.75 Gallons Power: 580 watts, and 60% RH Supply Voltage: 115 volts. Crawl Space Sizing: Very Tightly Sealed Up to 3,000 Sq. Ft. (15,000 Cu. Ft.) Moderately Sealed Up to 2,200 Sq. Ft. (11,000 Cu. Ft.) Some Leaks & Imperfections Up to 1,800 Sq. Ft. (9,000 Cu. Ft.) Check On Amazon
Smart WiFi
ALORAIR Storm LGR Extreme Smart WiFi Commercial Dehumidifier
cETL Listed, Memory Starting, for Damage Restoration, Crawlspace, and Basement Drying. Comes with a Pump, 180 PPD at AHAM, 5 Years Warranty. Check On Amazon

Detailed Reviews Selected Dehumidifiers

01. ALORAIR Basement Crawlspace Dehumidifier

AlorAir and its specialist equipment are also on our list because they perform admirably. The AlorAir Sentinel HDi90 is a high-priced dehumidifier that specializes in crawl space and basement humidity control.

The Sentinel HDi90, like other AlorAir dehumidifiers, has epoxy-coated refrigerator coils that provide corrosion protection while preserving heat transfer ability over the coils’ lifetime. Furthermore, the enhanced corrosion protection minimizes the risk of Freon leakage, extending the product’s overall life.

Basements and crawl spaces are notoriously damp in any season, necessitating the use of dehumidifiers that can function in low-temperature environments. The Hot Gas Valve Defrosting technology is included in these items for speedy and energy-efficient defrosting in low temperatures, allowing it to operate efficiently even at 36°F. During low-temperature seasons, the HGV defrosting system guarantees that the unit operates efficiently and constantly without stopping to defrost, saving time and extending the unit’s life.

ALORAIR BasementCrawlspace Dehumidifiers

The Sentinel HDi90’s remote control and monitoring capabilities making it an excellent choice for crawl spaces and basements. You can use the remote control to monitor the humidity level and adjust the unit’s performance without personally checking on it. It should be noted, however, that the remote control must be purchased separately.

It comes with a heavy-duty condensate pump that conveniently attaches to the device with a 20-inch lifting distance to draining won’t be an issue. The condensate pump allows you to utilize a drain hose in almost any place.

AlorAir stands behind their goods, which is why the Sentinel HDi90 comes with a 5-year warranty and excellent after-sales service. If you ever need a replacement or assistance with your unit, you may easily contact their support team from anywhere in the country.

02. Aprilaire 1830Z Pro Dehumidifier

The Aprilaire 1850 Dehumidifier is perfect for dehumidifying your crawl space and can remove up to 12 gallons (95 pints) of water every day. It may be ducted to your HVAC system for your convenience, and the control panel can be installed on the top or front of the device for convenient access from any location.

The dehumidifier features an easy-to-use interactive display that makes setup and operation a joy. With no dirty trays to empty and a simple once-a-year filter cleaning or replacement, the Aprilaire 1850 is low maintenance.

Aprilaire created and constructed the Aprilaire 1850 in the United States, and it is made to last. With corrosion-resistant aluminum coils, quality manufacturing procedures to minimize leaks, and robust packing for damage-free shipment, Aprilaire continues to improve the quality of its dehumidifiers. It comes with a 5-year warranty to give you even more peace of mind.

Aprilaire - 1830Z 1830 Pro Dehumidifier

This dehumidifier works with single-phase 60 Hz power sources ranging from 110V AC to 120V AC. It is incompatible with power sources that operate at 50 Hz.

Corrosion-resistant aluminum coils are built to last. Aprilaire, the best in indoor air quality solutions, designs and manufactures dehumidifiers in the United States. Reduce the rate of airborne virus survival by using a dehumidifier to keep relative humidity below 60%.

Reduces & controls basement & whole-house humidity to help avoid damp carpeting and furniture, mold, mildew, and odors in a sealed crawl space, as well as mold, termites, structural wood rot, and odors.

Periodically removes up to 12 gallons (95 pints) of water. There’s no need to empty a water tray, and it’s easy to set up: position a hose or dehumidifier over a drain, level it, plug it in, and set the target humidity, and you’re done. When the humidity level rises above the set point, the control immediately begins dehumidification.

03. DRI EAZ F413 Revolution LGR Dehumidifier

You undoubtedly know what Dri-Eaz specializes in if you have a crawl space dehumidifier from them. The products from Dri-Eaz Revolution LGR are among the best on the market. They can dry big areas of up to 7,000 square feet thoroughly. Don’t be fooled by its diminutive size. This dehumidifier can outperform even a giant, energy-guzzling commercial dehumidifier with a capacity of 136 pints of moisture per 24 hours.

This product has the highest price on our list, but we believe it is well worth it. The Revolution LGR is a powerful and one-of-a-kind product. It has a small footprint and can fit in crawl spaces where other dehumidifiers can’t. These types can be used to keep places dry in crawl spaces, stairwells and bathrooms, kitchens, and corridors.

This product will continue to run until all carpets, subfloors, walls, and other structural materials have dried completely. Because of the Revolution LGR’s size, it’s simple to stack and store. A standard hand truck can easily move multiple units if necessary.

DRI EAZ F413 Revolution LGR Compact Dehumidifier

The Revolution LGR has a built-in humidistat with real-time input and outlet temperature and relative humidity display to assist you in monitoring environmental conditions and dehumidification progress.

You won’t have to worry about the Revolution LGR’s ongoing functionality because it features a built-in automatic pump that allows it to continually pump condensed water into a sink, toilet, or drain hose. Furthermore, suppose your location experiences periodic power outages. In that case, you won’t have to worry because the crawl space cleaner’s automatic restart function lets it resume work in the crawl space where it left off once the power is restored.

Dri-Eaz stands behind their goods, which is why the housing of the Revolution LGR comes with a limited lifetime guarantee. They also provide a 6-year limited guarantee on each unit’s refrigeration system. Please keep in mind that these warranties are only available if you buy directly from the manufacturer.

04. RINKMO 296 PPD Commercial Dehumidifier

This RINKMO 296 PPD Commercial Dehumidifier is the best industrial dehumidifier with a broad coverage area of 8,000 sq. ft. This product provides high-efficiency moisture removal in the vast majority of cases.

It has a 353 CFM (37 gallons) capacity, making it perfect for commercial or industrial applications. This RINKMO heavy-duty dehumidifier extracts up to 296 pints per day, making it ideal for use in industries, workshops, and big basements.

It’s also worth noting that RINKMO has a 3.17-gallon water tank with an AUTO-OFF feature that decreases manual drainage frequency while also preventing overflow. The drain hose is 3.28 feet long for efficient gravity drainage.

RINKMO 296 PPD Commercial Dehumidifier

This product is more compact than most typical dehumidifiers, measuring only 19.5 x 15.7 x 32.5 inches. Moving and storing this dehumidifier is simple and easy because of its four casters and two side-recessed handles.

The big touch-pad control panel makes setting and monitoring our RINKMO dehumidifier a breeze. The inbuilt hygrometer, which has an ON/OFF feature, automatically detects and maintains your ideal temperature settings. It also has AUTO-RESTART and AUTO-DEFROST functions in case the power goes out or the coils frost up.

05. COLZER 212 Pints Crawl Space Commercial Dehumidifier

Even though we’ve covered a lot of strong dehumidifiers so far, none of them equal Colzer’s heavy-duty offering. If you need a reliable dehumidifier for basements, crawl spaces, under-construction sites, and other areas, this commercial dehumidifier from Colzer is a good choice. It removes up to 120 pints per day in AHAM conditions, but it may remove up to 212 pints in a single day under saturated conditions. Its continuous drainage system works wonders since it eliminates water and keeps the mess off the site. It also offers functions like an auto drain, auto defrost, and auto restart after a power loss.

Colzer dehumidifier covers up to 8000 square feet with its strong fan, which has a 353 CFM airflow rate, which is by far the best we’ve observed. It uses a dedicated pump to drain the water, which is discharged via the 16-foot long drain pipe that comes with the box. Furthermore, it does not operate continuously; instead, it periodically stops maintaining a set amount of humidity while also conserving electricity.

COLZER 212 Pints Crawl Space Commercial Dehumidifier

For hassle-free operation, this commercial dehumidifier with an inbuilt pump will automatically remove the condensate. Furthermore, the 16-foot drain hose and 16-foot drain vertical height provide maximum installation options.

Simply choose the desired humidity level, and this crawl space dehumidifier will auto cycle ON/OFF to maintain that level, as well as auto drain, auto defrost, and auto restart after a power loss for the most hassle-free humidity control.

The pump is simple to maintain and comes with a gravity drain and an external pump drain option for worry-free drainage. The air exit is duct-able, and the remote control is compatible, making installation and operation a breeze.

Buying guide for Crawl Space Dehumidifier

Capacity and Size

When it comes to installing a large or small crawl space dehumidifier, size might be a considerable barrier to overcome. While you must still select a machine with the appropriate capacity for your home and its moisture problem, you must also consider the system’s overall size.

Depending on where the dehumidifier is placed, weight has a role as well. Unless your crawl space is connected to a stand-up basement or cellar, you’ll want to think about maintenance and drainage. Always plan ahead of time for the location and placement of your dehumidifier, as well as its dimensions.

Quality of Dehumidifier

We’ll make it short and sweet because it’s about the problems beneath your house. Don’t waste time looking at equipment with a neat design if your crawl area is unclean and unprotected. A commercial-grade dehumidifier will outlast alternative systems beneath your home, even if it won’t win any beauty contests.

A well-built machine should have a metal shell rather than a plastic one. The feet on the bottom, outlets, inlets, and even the cord are weak points for dehumidifiers in this class. Poorly constructed dehumidifiers can cause problems in all places, and a short power line can leave you stranded. System warranties in this class are normally 5 years, with certain products falling somewhat outside of that range.

 Ease of Use

Although a dehumidifier is not a difficult appliance to operate, some are easier to use than others. The control panel, which can feature a computerized panel or straightforward controls, is one of the most important considerations. In any case, a well-lighted control panel will make life a lot easier in a poorly lit crawl space or basement.

Your dehumidifier’s water has to go somewhere, and that somewhere is usually the drip pan or outlet hose. Although some manufacturers construct their complete systems with ease of use in mind, the former is usually very straightforward to remove and dump.

The Level of Noise

Noise is one of the most important considerations while using a dehumidifier. You’d be astonished at how loud some models designed for crawl spaces are. This is when the decibel level comes into play. It varies from machine to machine, but it’s an easy-to-understand specification.

A jet engine may ring your ears at well over 100 decibels, whereas a vacuum cleaner can be around 75 dB. The Trane XV20i central air conditioner has a decibel rating of 55, and the best dehumidifiers for crawl spaces are often quieter than that. You don’t want a noisy unit under your bedroom floor; therefore, placement is crucial.


It’s not always necessary to hire a professional to install a dehumidifier in the crawl space beneath your home. In most cases, the machine’s design determines how it is installed. Some dehumidifiers can be hung, while others are designed to fit neatly into a nook or corner or integrate with your HVAC system.

With homeowners, crawl space dehumidifier installation boils down to a couple of factors: space and size. You may need to modify a portion of your crawlspace to create room for a system in some circumstances. Because some units weigh more than 50 pounds, drainage can be a problem if it relies on a dehumidifier pump or hose.


Always stick to your budget, even if you come across a more expensive dehumidifier. Be careful when selecting the size of your dehumidifier; you want it to be appropriate for your home’s needs. Portable devices are perfect because if you need to change location, it is easy to find a space that will work with the device.

Tips to Use this Dehumidifier

  • At the center of a space, the best dehumidifier for crawl spaces is being used. This ensures that it can operate efficiently and provides moisture uniformly to the area.
  • To ensure maximum performance, it is highly recommended that your unit be installed at least six inches away from a wall, ceiling, or floor. It would help if you opened the air intake vent so it can easily absorb air.
  • Make sure to vacuum and clear the crawl space of dust and debris before setting up your dehumidifier.
  • By removing the buildup of lint and hair from a dryer’s vents, you lower the risk that another material will clog it.
  • To handle the issues listed above, make sure the crawl space remains dry. The presence of moisture and water in large quantities can have a devastating effect. Extracted wet insulation and standing water both require extraction. Experts say using a dehumidifier is the best way to go.
  • One of the most popular ways to keep a crawl space from getting wet is by using venting. However, this method is not perfect as it does have a higher risk of causing even more damage to your home and your property.
  • Another homeowner utilized a vapor barrier and gravel to decrease humidity. This is true, but the crawl space floor can still let water in. Because of the existing cracks, which constantly allow water in, a vapor barrier cannot keep the water out. Since this is an issue, you should buy a dehumidifier that effectively dries out the air.
How Dehumidifier Works

Frequently Asked Questions 

  1. Do I need a Dehumidifier for my Crawl Space?

    Air circulates throughout your home, including attics, crawl spaces, basements, and stale air will eventually migrate to other areas. But it's not simply humid air that circulates through the house and crawls space. Airborne spores and allergens from your crawl area can move throughout your home, causing the infestation to expand through the ventilation system. You'll have a house that smells like mold and mildew, and your family may start having allergic reactions or, in the worst-case scenario, toxic mold poisoning. Even if you have a unit in the optimal location in your home's living rooms, it will only reduce humidity. If it's already there, it can't be killed.
    If you don't want your home to experience the nightmarish situation mentioned above, you should invest in an excellent crawl space dehumidifier to avoid the problem from occurring. These products dry up the confined air, making it uninhabitable for allergies and mildew.
    The nicest thing about crawl space dehumidifiers is that you can set them to work and forget about them, especially if the type you purchase has a drain hose outlet.

  2. What humidity level is appropriate for a crawl space?

    Maintaining HYGIENE and humidity levels in crawl areas is essential for the building's and its occupants' health. The perfect humidity level that will help you achieve your building and health goals is 30% to 60%. For your crawl space, a humidity level of 55 percent is excellent.

  3. Will a dehumidifier help to prevent mold from growing in our crawl space?

    Dust mites, molds, mildews, and spores thrive in crawl spaces' dark and wet conditions. Mold thrives in crawl spaces where moisture is abundant. To avoid mold formation, make sure your crawl space is dry and has a low relative humidity level.
    If left uncontrolled, mold will spread throughout your home, causing an infestation that will be difficult to eradicate. The easiest way to get rid of mold in your crawl space is to use a good crawl space dehumidifier. Dehumidifiers ensure that mold development is controlled and eventually eliminated by eliminating moisture from the air.

  4. Is a dehumidifier required in an encased crawl space?

    You might consider enclosing your limited space as part of your efforts to decrease moisture and mold in crawl spaces. Encapsulation is the process of using white plastic to completely seal every seam, crack, junction, and vent in your crawl space.
    A clean, well-maintained, and conditioned crawl space improves air quality while also saving money on energy expenses. Even after encapsulation, the best crawl spaces require the use of a dehumidifier to maintain the area dry, clean, and protected from temperature swings.

  5. How much noise does a dehumidifier make in a crawl space?

    Dehumidifiers are well-known for making a lot of noise. The sound levels are influenced by the compressor, exhaust fans, and condensate pumps. The noise level of a home dehumidifier is usually approximately 55-60 dB, which is about the same as normal human speaking.
    Some crawl space dehumidifiers become noisier when the fan motor or compressor mounting brackets or screws break loose. The fan or compressor vibrates and becomes noisy as a result of the faulty connection. So, if you notice that the dehumidifier in your crawl area has started to make a noise, disconnect it and tighten any loose components first. If the noise persists after tightening, the fan or compressor may need to be replaced.

  6. How can you get rid of a house's crawl space odor?

    Mold, mildew, insects, and rodents all contribute to the stink of crawl spaces. The tenants of the building suffer from respiratory allergies as a result of this terrible odor. Installing an easy-to-use dehumidifier specifically for your crawl space region is the best approach to getting rid of the stink.

  7. How Do Crawl Space Dehumidifiers Benefit Homeowners?

    Even though crawl spaces are known to be damp or moist, the area should not contain moisture and must be kept dry. Wetness can destroy your house, which is why this area needs to remain as dry as possible for it to have a healthy environment. Mold could grow, and mildew will also arise more efficiently since they feed on wet.

  8. How do you go about finding the best crawl space dehumidifiers?

    You can't use your old dehumidifier since there's not enough space in the crawlspace. Making sure you get a high-quality one is essential.

  9. Is a crawl space dehumidifier required?

    Air sitting in the house for an extended period may ultimately seep into attics, crawlspaces, and even basements. Mold infestations can be propagated through ventilation systems, are another source of moisture, in addition to wet air from your crawlspace. If you haven't previously installed dehumidifiers in your major living rooms, now is the time. Dehumidifiers aid in the control of mildew and mold growth, which can cause allergic reactions or toxic mold poisoning if left unchecked. Don't worry if you're having trouble finding a suitable location for a unit.Humidity meter

    A crawl area is an excellent location for removing stale air, gaining access to plumbing and electrical fixtures, and removing cobwebs. Fungi and bacteria can thrive there, making it an appealing environment for pests that contaminate other areas of your home. Fungi pose a significant danger of respiratory discomfort.

  10. Is your crawl space always damp?

    Many factors contribute to why your crawl space is permanently damp. Your home's foundation or walls could have developed cracks enabling water to seep into the area. If you have moisture present in the air, your hardwood floors may be swelling and shrinking depending on humidity levels, which causes them to bow up and down as they swell.

Wrapping Up

We’ve finally completed our analysis, reviews, and FAQs to assist you in selecting the best dehumidifier for your crawl space. It makes little difference whether you buy them online or go to the nearby store to find the greatest deal. Remember that purchasing a dehumidifier machine is the best thing you can do for your home and crawl space in humid climates.

Check to see if the model you want to buy comes with solid parts and a labor guarantee from the manufacturer. Before you buy, check out the unit’s mobility, power efficiency, digital controls, energy consumption, and sensor capabilities. The Aprilaire 1830 Pro is the greatest under-the-house dehumidifier, according to the editors.

By purchasing a dehumidifying device that fits your budget and purpose, you can say goodbye to mold and mildew, respiratory ailments, bad odors, and allergy triggers.

Joseph is Green Home and Kitchen's editor-in-chief. He describes himself as a dedicated home improvement and automation advisor. He enjoys helping others discover the joys of innovation. Joseph closely follows the latest trends in the industry to keep the visitors in the flow.

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