A crawl space is a 1 to 3 feet high, enclosed, narrow area between the ground and the first floor of a house. Because of its confined surroundings, the air inside has often been poorly ventilated. Moisture, mold spores, as well as other pollutants like microbes, can easily accumulate and grow that can pose a serious health risk. Too much moisture can also affect the integrity of a structure if not addressed properly. Fortunately, a crawl space dehumidifier can effectively fix these issues.

Crawl space dehumidifiers are efficient enough to eliminate moisture and dampness for a better home environment. Built to be placed or installed in a crawl space area, this specific type of dehumidifier can also boost your home's atmosphere and enhance the health of your crawl space.

That being said, we analyzed and highlighted the best crawl space humidifiers commonly available on the market with the help of experts and professionals. With them,  you can effectively address crawl space moisture issues and provide a healthier environment for your family by using the best crawl space dehumidifier. 

So here are the top-notch brands and models which incorporate quality performance with a variety of aspects. Also, to know further about their fantastic deals and offers on Amazon, just press the buttons below!

Best Crawl Space Dehumidifiers Comparison & Rating

Crawl Space Dehumidifiers

Features

Aprilaire - 1850Z 1850 Pro Dehumidifier, 95 Pint Commercial Dehumidifier for Crawl Spaces, Basements, Whole Homes up to 5,200 sq. ft.
  • 5200 square feet
  • 95 pints
  • 265 CPM
MIDEA MAD50C1ZWS Dehumidifier for up to 4500 Sq Ft with Reusable Air Filter, Ideal for Basement, Bedroom, Bathroom, New 50 Pint-2019 DOE (Previous 70 Pint)
  • 50 pints per day
  • 4500 square feet
  • 49 decibels
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)
  • 210 CPM
  • 2600 square feet
  • 90 pints per day, 198 pints at saturation
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
  • 130 CPM
  • 1300 square feet
  • 55  pints per day, 120 pints at saturation
  • tank fills up for around 2 to 3 days
  • 215.28 square feet
  • 0.53 pints per day (250 ml)

1. Aprilaire 1850Z (1850 Pro) Dehumidifier

Aprilaire - 1850Z 1850 Pro Dehumidifier, 95 Pint Commercial Dehumidifier for Crawl Spaces, Basements, Whole Homes up to 5,200 sq. ft.
Specifications:
98% Overall

Brand

Aprilaire

Dimensions

27.5 x 12.5 x 14.5 inches

Weight

70  pounds

Area Coverage

5200 square feet

98%
Capacity & Coverage
97%
ease of use
98%
features
98%
value for money
Pros:
  • Boasts a commercial dehumidifier with a gross area coverage of 5200 square feet, a pint per day volume of 95 pints, and an airflow capacity of 265 CPM.
  • Reduces airborne virus survival rates by maintaining a humidity level of less than 60%.
  • Provides a set-and-forget control that initiates dehumidification when humidity levels rise above a preset threshold.
  • There is no need to dump a messy water tray, and it is easy to operate and set up.
  • Contributes to the prevention of wet carpets and furnishings, mold, mildew, and odors, as well as mold, termites, structural wood rot, and odors in an enclosed crawl space.
Cons:
  • It's a little on the expensive side, but it's well worth it.
Final Take:

This Aprilaire 1850Z (1850 Pro) Dehumidifier is perfect for dehumidifying your entire home and can remove up to 12 gallons (95 pints) of water a day. We put it to the test in a 600-square-foot house constructed over a streambed, where water often rises from the crawl space floor. When we first turned on the dehumidifier, it gave us an RH level of 96% in the crawl space. We set the unit to 40 % and it went from 96% to 76%in just 2 hours! It dropped to 34% after a few days and has remained constant. Moreover, it can be rigged to your HVAC system for your accessibility, and the control panel can be placed on the top or front of the device for convenient access from either spot. There are no dirty trays to empty, and filter cleaning or repair is only done once every year. That said, we highly recommend this  Aprilaire 1850Z (1850 Pro) Dehumidifier as you’ll get is a stunning unit that won’t fail you in any season! A true gift for you!

2. MIDEA MAD50C1ZWS Dehumidifier

MIDEA MAD50C1ZWS Dehumidifier for up to 4500 Sq Ft with Reusable Air Filter, Ideal for Basement, Bedroom, Bathroom, New 50 Pint-2019 DOE (Previous 70 Pint)
Specifications:
97% Overall

Brand

Midea

Dimensions

15.94" x 11.54" x 24.29 inches 

Weight

43.87 pounds

Area Coverage

4500 square feet

97%
Capacity & Coverage
98%
ease of use
97%
features
96%
value for money
Pros:
  • Offers a dehumidifier with  4500 square feet capacity that can collect 50 pints of water per day and modify humidity from 35% to 85%.
  • Releases a maximum volume of 49 decibels, allowing for a quiet function that is comparable to a simple conversation.
  • Comes with a reusable filter that helps to maintain air quality without the need for costly replacement filters.
  • Provides a constant dehumidification mode that is ideal for maintaining the correct humidity level in your crawl space.
  • Provides a good humidity range of 45% to 55%, based on the environment in your location and the size of the room.
  • When power is restored, the auto-restart feature engages your preferred settings, minimizing interruption due to power outages.
Cons:
  • The sound of the unit can be noticeable once the Turbo mode is on but this is fine for a crawl space or basement.
Final Take:

Midea is the world's biggest air conditioning manufacturer, and this MAD50C1ZWS Dehumidifier is yet another excellent product. It provides a variable fan speed to maximize its performance. Its continuous comfort mode retains at 45% to 55% humidity threshold. In our series of tests, this dehumidifier is indeed incredible because at 60% humidity set on "comfort" mode, 1.6 gallons of water were extracted within only 12 hours! Additionally, this dehumidifier combines innovative features like automatic restart in the case of power failure, automatic shut-off when the internal bucket is loaded, auto defrost to avoid internal damage, and an auto-cleaning filter notification.

3. AlorAir Sentinel HDi90 Crawl Space Dehumidifier

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)
Specifications:
95% Overall

Brand

AlorAir

Dimensions

24.8 x 13.78 x 15.75 inches

Weight

57.2 pounds

Area Coverage

2600 square feet

96%
Capacity & Coverage
94%
ease of use
96%
features
95%
value for money
Pros:
  • Reduces 90 pints per day at AHAM, 198 pints at saturation, and covers up to 2,600 square feet crawl space with a flow rate of 210 CPM.
  • Features a fast and efficient automatic defrosting system that allows the unit to operate at a low temperature (36 degrees Fahrenheit) and produce consistent results efficiently and without intermittent stops during the defrosting phase.
  • It's an Energy Star-certified dehumidifier that removes moisture quickly and effectively while using less energy than regular dehumidifiers.
  • Operates with a large, high-duty condensate pump that continually pushes water collected out of the area smoothly and quickly.
  • There's no need to hold the thermostat at low and uncomfortable temperatures to regulate humidity once you've achieved a reliable RH of 50%.
  • Designed with an optional remote monitoring feature, making it an excellent choice for areas where remote sensing and control are needed. It is likewise a wise option for soundproofing and space efficiency.
Cons:
  • The drainage hose is relatively short and kinks quickly.
  • The fan of the unit is a little noisy, but it goes unnoticed when other activities are happening around the home.
Final Take:

This AlorAir Sentinel HDi90 Crawl Space Dehumidifier is ideal for extremely humid crawl spaces. It will eliminate up to 90 pints of water a day, keeping your crawl space dry as well as mold-free. Just a few days after we installed the unit, the humidity level reduced from 80% to 35%. The moisture content of the wood has also decreased from 17% to 18% down to 11% to 12%. The pump is working well after we ran the drain hose on approximately 10 inches with a 4-inch vertical climb. This unit is something we would recommend to everyone who has moisture concerns in their crawl space. Moreover, it boasts amazing features such as a built-in pump, secured coils, and a defrost mechanism. With Sentinel HDi90, we assure you that you’ll get a straightforward solution for your crawl space moisture problems!

4. AlorAir Sentinel HD55 Crawl Space Dehumidifier

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
Specifications:
94% Overall

Brand

AlorAir

Dimensions

19.2×12.2×13.3 in

Weight

57.2 pounds

Area Coverage

1300 square feet

94%
Capacity & Coverage
94%
ease of use
93%
features
94%
value for money
Pros:
  • Boasts a  Rare Earth Alloy Tube Evaporator that protects the coils and maintains heat transferability and extends the life of the coils.
  • Comes with an Energy Star certification that works efficiently while using less energy than standard dehumidifiers.
  • Includes a MERV-8 filter that protects internal parts from damage caused by dust as well as other contaminants, ensuring efficient process and long-term usage.
  • Removes 55 pints per day under AHAM conditions, 120 pints under saturation conditions, and occupies up to 1300 square feet of crawl space with a 130 CPM flow rate.
  • Features an automatic defrost function that allows the dehumidifier to operate at a low temperature (36 degrees Fahrenheit) while saving energy and extending the life of the unit.
  • Automatically switches on and off and highlights a memory start function in the event of a power outage.
Cons:
  • It is not equipped with a built-in condensate pump.
Final Take:

This AlorAir Sentinel HD55 Crawl Space Dehumidifier is highly recommended for small crawl space areas. It's easy to fit into tight spaces because of its compact shape and scale. It can remove up to 55 pints of water a day and cover up to 1300 square feet area. This unit has a few brilliant features like automatic shut-off when you achieve your desired moisture levels. During our testing, it runs consistently with six-point hysteresis when set at 48% humidity level in 1400 square feet crawl space, switching on at 51% and turning off at 45%. Moreover, the remote control, which can be bought separately can be placed about four meters from the unit and can also offer a longer and more powerful operating cycle than inbuilt humidistat. Furthermore, at 3 feet, we measured 65-decibel units of sound made up of rushing air. The compressor can be heard but at a far less irritating volume.

5. Hysure Portable Mini Dehumidifier

Specifications:
93% Overall

Brand

Hysure

Dimensions

11.26 x 6.38 x 5.28 inches 

Weight

2.65 pounds

Area Coverage

215.28 square feet

90%
Capacity & Coverage
96%
ease of use
92%
features
93%
value for money
Pros:
  • Offers a dehumidification volume of up to 250 ml (0.53 pints) per day, maintaining a comfortable humidity level in a variety of settings, including the house, crawl space, bathroom, RV, baby room, and garage.
  • Best use in a 10-20 square meter area with a temperature of 86 degrees Fahrenheit and an RH of 80%.
  • Works calmly, with a noise level of fewer than 33 decibels.
  • Comes with an upgrade section dehumidifier that uses no chemicals and consumes little electricity.
  • Once the water tank is full, it automatically shuts off and displays a full indicator light to notify you to drain the tank.
  • It is an excellent environmentally friendly solution for damp and condensation absorption.
Cons:
  • The water tank fills up pretty quickly and needs to be drained often.
  • Small area coverage.
Final Take:

With its small size but huge features, the Hysure Portable Mini Dehumidifier provides you with a good standard of crawls space experience. It is made with Peltier technology, which is whisper quiet and doesn't need a compressor or heavy machinery. At 30°C and RH 80% relative humidity, it effectively and hygienically removes excess moisture. This small dehumidifier works well in a crawl space measuring 6 feet by 13 feet. The tank fills up for around 2 to 3 days in the specified area, but it is simple to drain and maintain because the power light switches from Green to Yellow when it is time to drain it.  It's also remarkably quiet, comparable to that of a computer fan. This mini dehumidifier is designed with high ABS material and has a sound level of fewer than 33 decibels, so it won't interfere with your daily work or sleep, giving you a relaxed and quiet environment.

Best Crawl Space Dehumidifiers - Buyer's Guide

Size

Since there isn't much room in a crawl space, putting something down there could be challenging. When it comes to having a big or tiny crawl space dehumidifier, size may be a major problem to solve. Although you must always choose a unit with the appropriate capacity for your home and its moisture issue, you must also consider the system's overall dimensions. Remember to calculate the crawl space of your home before deciding on a model to ensure a good match.

Area coverage

Another critical factor to consider is the coverage area. Some crawl space dehumidifiers can handle areas larger than 1000 square feet. That being said, it's worth noting that the units that serve wider areas have a larger design. Check the needs and size of the crawl space and also how humid it is when selecting a unit. Units with greater coverage will consume more energy, so consider the requirements carefully.

installation

It's not always necessary to hire a technician to install a dehumidifier in your crawls space. In certain instances, the device's configuration determines how it is installed. Several units may be hung, whereas others are built to fit perfectly into a side table or corners or integrate with your HVAC system. In certain instances, you can need to modify a portion of your crawl space to make room for the device.

performance

Dehumidifiers are usually classified according to the amount of moisture (pints of water) they can eliminate every day or per 24-hour period. This can range in scale from either a small 0 pint to a significant 90 pints and beyond. Additionally, during the winter months, the crawl space can become quite pretty cold. This could be harmful to the dehumidifier's coils, so a defrost mechanism is necessary.

ease of use

Although a dehumidifier is not a complex machine to operate, some may be simpler to use than others. The control panel, which may include a digital panel or absolutely basic controls, is one of the most important considerations. In any case, a good control panel would make things a lot simpler in a dark room crawl space. Moreover, having a remote control intended for your crawl space dehumidifier will also come in very handy.

Best Crawl Space Dehumidifiers - FAQs

Is it safe to use a regular dehumidifier in a crawl space?

No, it is not recommended to use a regular dehumidifier because crawl space has its own classification when it comes to dehumidifiers.

How to choose the right dehumidifier?

If you want to keep your home dry and prevent mold growth, you'll need to choose a unit with the right capacity. Here's a fast guide to determining what size dehumidifier you'll need:


12 pints for 500 square feet
17 pints for 1,000 square feet
22 pints for 1,500 square feet
27 pints for 2,000 square feet

At what temperature should a dehumidifier be set?

When humidity levels rise above 60%, mold begins to develop in the crawl room. As a result, you can maintain the humidity level in your crawl space below 60%. For the average, set your dehumidifier at about 50%.

Where should I place a humidifier in my crawl space?

It can be placed anywhere where the discharge airflow is not obstructed. Remember that hanging the dehumidifier will cause noise to the area above, so you should place it on concrete blocks.

Author

Jimmy Black started his career as a construction and carpenter foreman. After years of hard work, he decided to go on his own. Now, Jimmy is one of the trusted experts at SolidSmack who knows at first glance whether your hammer would do a great job or not. He still involves himself in various construction projects and works for individual clients. Behind formalities, he enjoys being a father to two lovely kids who keep on asking him why they can’t quit school and travel the world like Dora The Explorer.