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7 Best Crawl Space Dehumidifiers - Reviewed and Rated 2021
A damp crawl space can attract unwanted bugs and rodents and damage any materials you store in the area. Moisture can also promote rot and mold, which may require extensive repairs to the frame of your home.
Purchasing a crawl space dehumidifier helps to collect excess moisture from the air and safely dispose of the water where it won’t cause damage.
Choosing the best crawl space dehumidifier for your specific requirements can be challenging. You need to consider the unit’s size, capacity, and energy efficiency to keep your energy bill low.
We’ve tested some of the most effective and efficient crawl space dehumidifiers available. Our guide can help you find a model that matches your needs and your budget.
In a Rush? Here’s our winner..
Editor’s Choice: ALORAIR Crawl Space Dehumidifier
Combining energy-efficient technology with powerful performance, this model is an excellent dehumidifier that can remove moisture from any crawl space. We loved the easy to operate controls and the ability to monitor the status of the dehumidifier remotely.
Despite intense competition from rival models, we wholeheartedly recommend the ALORAIR Crawlspace Dehumidifier as the best crawl space dehumidifier on the market.
Clears up to an enormous 198 pints of moisture per day
Quick connect plugs for easy installation
4 adjustable wheels for maneuverability
Hot Gas Valve Defrosting System (HGV)
Internal corrosion protection
Durable MERV-1 filter
Indicator lights signal when the tank is full
Efficient power consumption peak of 72 watts
Removes moisture and dust particles
Removable water reservoir
Comes with 12v DC power adapter
No moving parts for ultra-quiet operation
ECOR PRO 30 Pint
No need to empty water containers
Does not use harmful refrigerants
Automatically adjusts according to the air humidity level
Works in temperatures as low as -4°F
Works in spaces up to 500 ft2
No need for drain hoses
Waykar 40 Pint Dehumidifier
Easy to maintain desired humidity rate
Sleek and modern design
24-hour timer for preset operation
Ergonomic lift-up handles
Reusable and washable filter
Power outage restart
No requirement for replacement filters
Compressor thermal overload protection
Stylish mirage display
Anti-spill tank guard
Continuous Drain Outlet for automatic drainage
Smooth gliding wheels for transportation
7 Best Crawl Space Dehumidifier Reviews
- Hot Gas Valve Defrosting System (HGV)
- Internal corrosion protection
- Durable MERV-1 filter
- Built-in pump
- Comes with a 5-year warranty
This unit’s HGV system allows it to work efficiently at low temperatures without requiring periodic stopping during the defrosting process. We are also impressed with the internal corrosion protection system, which uses an epoxy coating to minimize rusting and maintain the coil’s ability to transfer heat.
The cables on the condensation pump have quick-connect plugs for easy installation and maintenance. We found the 4 adjustable wheels smooth when rolling this unit into the ideal position for maximum moisture clearance.
With the capacity to clear up to 198 PINTS OF MOISTURE per day and a 5-year warranty for peace of mind, this is the best dehumidifier for your crawl space.
- Clears up to an enormous 198 pints of moisture per day
- Quick connect plugs for easy installation
- 4 adjustable wheels for maneuverability
- One of the more expensive crawl space dehumidifiers
Who Should Get This?
If you’re ready to invest in a crawl space dehumidifier that combines efficient, powerful performance with a quiet operational noise level, look no further.
- No moving parts for ultra-quiet operation
- Lightweight at 4.45 lbs.
- Removable water reservoir
- Automatic capacity shut-off
- Comes with 12v DC power adapter
Despite the affordable price tag, we found this crawl space dehumidifier performs at an exceptionally high level. There are no moving parts, allowing the device to remove water and dust particles from the air while making little noise.
The lightweight design allows you to move the unit to the most affected areas quickly, and the automatic capacity shut off stops the dehumidifier from overfilling. We could quickly remove the water reservoir for easy-emptying, and with a power consumption of only 72 watts, this unit doesn’t place an unnecessary burden on your electricity supply.
Compact yet powerful, we recommend this dehumidifier for those shopping on a budget.
- Indicator lights signal when the tank is full
- Efficient power consumption peak of 72 watts
- Removes moisture and dust particles
- May not be large enough for some requirements
Who Should Get This?
Shopping on a budget doesn’t mean you have to accept lesser quality. This dehumidifier performs at the level of rival models with considerably higher price tags.
- Works in temperatures as low as -4°F
- Suitable for freestanding or mounted operation
- Works in spaces up to 500 ft2
- No need for drain hoses
- 15’ power cord for extra reach
With the ability to remove moisture in crawl spaces measuring up to 500 ft2 and a 15’ power cord enabling you to place the unit away from power sockets, this is a heavy-duty piece of equipment.
While we used the unit as a freestanding dehumidifier, you can also mount the unit on your ceiling or wall to save space. For the ultimate convenience, the unit automatically adjusts the power level according to the amount of humidity in the crawl space, removing the need for monitoring or manual adjustment.
- No need to empty water containers
- Does not use harmful refrigerants
- Automatically adjusts according to the air humidity level
- Susceptible to corrosion in harsh environments
Who Should Get This?
Removing moisture from your crawl space doesn’t have to be a hassle. This convenient dehumidifier makes it easy to improve the air quality in a damp area.
- Ergonomic lift-up handles
- Reusable and washable filter
- Touch screen control panel
- Power outage restart
- Lifetime expert tech support
Along with a striking aesthetic appearance, this dehumidifier has a 40 pints capacity that ensures you don’t have to continuously empty the unit. There is also an included 6.56’ drain hose for automatic emptying. If you enjoy a specific humidity level in the air, you can program the unit to achieve and maintain your desired setting.
We like the inclusion of a 24-hour timer, enabling you to instruct the unit to turn on when you are not home. This feature is particularly beneficial if there are certain times of the day when the humidity in your crawl space is higher, such as during afternoon rain showers.
- Easy to maintain desired humidity rate
- Sleek and modern design
- 24-hour timer for preset operation
- Some users report the water bucket is relatively small
Who Should Get This?
If you spend time in your crawl space retrieving stored items or even use it as a small room, this dehumidifier is pleasant to look at and adds a touch of modern style.
- Independently tested for quality standards
- Anti-spill tank guard
- Continuous Drain Outlet for automatic drainage
- Smooth gliding wheels for transportation
- Energy Star-certified
This Honeywell dehumidifier has ENERGY STAR CERTIFICATION, so you can be confident it removes moisture from the air without using excessive power. Before leaving the factory, each unit undergoes independent third-party testing to ensure it meets the highest operational standards. Honeywell also backs its products with a 5-year warranty for your peace of mind.
It was easy to wash the durable filter under a tap, and there is thermal overload protection to reduce the risk of damage if the unit overheats. The useful anti-spill guard prevents water leakage, and the control panel is easily accessible when adjusting the settings. Simply roll the dehumidifier into place for fast moisture reduction in your crawl space.
- No requirement for replacement filters
- Compressor thermal overload protection
- Stylish mirage display
- May be slightly noisy for some users
Who Should Get This?
It’s important not to overlook the energy cost of using a dehumidifier in your crawl space. This model removes moisture from the air without using excessive energy.
- Suitable for use in areas measuring up to 4,500 sq. ft.
- Dry clothes function
- Top-mounted digital control panel
- Comes with a 30-days money-back guarantee
- 360° easy-roll hidden wheels
If you have a substantial sized crawl space, this is the dehumidifier for you. While the area we used for testing was large, this unit can clean the air in an area measuring up to 4, 500 ft2. We loved the dry clothes function. If you have a basement with an open crawl space, this option allows you to hang wet clothes and let the dehumidifier dry them out naturally.
The top-mounted digital control panel is easily accessible; the auto defrost function is vital if you need to use your dehumidifier in colder weather. While the unit functioned superbly during testing, an auto error detection feature removes the guesswork if an issue arises.
- Easy to wipe down to keep clean
- Auto error detection feature
- Auto defrost function for use in colder conditions
- Unsuitable for very humid environments
Who Should Get This?
It can be challenging to remove moisture from more substantial crawl spaces, but this model is up to the task of improving the air quality in all but the largest of areas.
- Neat and compact design
- Made from safe ABS plastic material
- Weighs only 5.17 lbs.
- 40 dBA low noise operation
- 50 oz. water tank
If you have a smaller crawl space or have specific areas that are more negatively affected by excess moisture, a mini dehumidifier might be the answer. Using the convenient carrying handle, we could transport this model around the crawlspace to target spots where water could enter the room.
While you need to empty the water tank more often than you would when using a larger unit, the 50 oz. tank still has plenty of capacity for smaller spaces. The 40 dBA operational noise level ensures you can have this dehumidifier running in the background even if you are in the area for an extended period searching through storage boxes.
- Absorbs damp and condensation
- Does not use chemical substances
- Convenient carrying handle
- Need to empty the water tank more often
Who Should Get This?
If you have a small crawl space or don’t want your dehumidifier to take up too much room, this compact model is an excellent choice.
How to Choose the Best Crawl Space Dehumidifier?
A dehumidifier can significantly improve the air quality in your crawl space, but there are several crucial factors to consider before making a purchase.
Crawl Space Size
You can use a compact humidifier to remove moisture from the air in larger crawl spaces, but it takes longer, and you may often have to empty a water tank. Buying a dehumidifier with the ability to remove more significant amounts of moisture in less time ensures your air quality improves more quickly.
Because the machine has the internal components to deal with large volumes of moisture, it also is less likely to overheat or require early replacement. Correctly matching the size of your crawl space to the capacity of the dehumidifier is vital.
Automatic or Manual Drainage
If your crawl space does not suffer from excessive moisture and you need a dehumidifier only to maintain the room’s air quality, manual drainage may not be an issue. Moving a small container of humidity to the sink is not much hassle, especially if it’s not a regular occurrence.
However, if you use your dehumidifier in a large or damp crawl space, we highly recommend purchasing a model with an automatic drainage system. The dehumidifier extracts water from the air and passes it through a drainage hose for disposal, allowing the unit to continue operating at maximum capacity.
Operational Noise Level
Some dehumidifiers can be noisy when in operation, which may not be a problem if you don’t spend much time in your crawl space. However, if you use the room as a storage area, then a near-silent dehumidifier is a better option.
Many models are quiet enough to allow you to enjoy a good night’s sleep if you are in the same room, so purchasing a model silent enough for a crawl space usually isn’t an issue.
An ongoing cost of using a dehumidifier is the price of electricity. You can minimize this expense by purchasing a dehumidifier that doesn’t use excessive energy when removing moisture from the air. Look out for a model with Energy Star certification, which shows they meet efficiency standards.
Final Verdict: Our Top Choice
Choosing our top pick for the best crawl space dehumidifier has been challenging. There is intense competition from many models, and you may find one of the other dehumidifiers on our list is a better fit for your home.
Our unanimous pick for the best dehumidifier for a crawl space is the ALORAIR Crawl Space Dehumidifier.
However, we simply can’t overlook the ALORAIR system’s incredible performance that keeps this unit working in the colder weather, the internal corrosion protective elements that ensure the unit is durable, and the integration with remote monitoring technology.
With the ability to remove a remarkable 198 pints of moisture per day, this is an excellent choice for any crawl space.
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