Best Crawl Space Dehumidifiers – 2020 Top Picks

| Last Updated: September 2, 2020

Unlike a basement, a crawl space is not a place to utilize for living and therefore often goes unnoticed by homeowners.

However, for good air conditioning and maintenance of the crawl space in hot and humid areas, dehumidifiers for a crawl space can be extremely important. These ensure that there is no excessive moisture, which can lead to several problems such as wet patches on your walls and ceilings. 

To help you clear out moisture from your crawl space, we’ve picked out the best crawl space dehumidifiers available on the market. We invite you to use this informational guide as a starting point for your search.

Comparison of the Best Crawl Space Dehumidifiers

  • Comes with a lifetime warranty
  • Best overall crawl space dehumidifier
  • Touchpad screen for temperature control
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  • Epoxy coated built
  • Covers an area of 1300 square feet
  • Runner up crawl space dehumidifier from our list
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  • Has a built-in 2.6 gallons water tank
  • Coverage area of up to 6000 square feet
  • Best crawl space dehumidifier for the money
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  • Has epoxy coated coils
  • Covers an area of 2600 square feet
  • Best dehumidifier with pump from our list
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  • Has a built-in humidistat
  • Best commercial crawl space dehumidifier
  • Comes with a protective polyethylene frame
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Why Would a Crawl Space Need a Dehumidifier?

Dehumidifiers regulate moisture levels and the condition of the air in your home. Excessive moisture can be problematic for a number of reasons, including damage to property, an unhealthy living environment, and buildup of bacteria. Here are some reasons for having a crawl space dehumidifier:

Pest Protection

Excess humidity leads to pest infestation, which can devalue your property and can also lead to several health issues. A dehumidifier will ensure protection from pests by controlling and regulating the moisture levels in the crawl space.

Hot and Humid Areas

If your house is in a hot region, then you are likely to have air conditioners installed and used frequently. This makes the air condensed in the crawl space, leading to high levels of moisture. A dehumidifier can help regulate the air in such humid and hot regions, making your life worry-free.

Healthier Living Environment

By preventing pests and buildup of condensed air in the crawl space, you will be maintaining a healthier environment in your home. Extra moisture in the air can lead to respiratory issues, build bacteria and mold, and can also cause allergic reactions. A dehumidifier can help prevent all of that.

Aspects to Consider Before Buying

Before we go ahead and review our top picks, there are some important aspects that you must consider before making your purchase. These aspects include the area coverage, weight and dimensions, extra features and bonuses, and noise production. These are some important aspects that have a direct impact on the overall performance and experience of any crawl space dehumidifier.

Coverage Area

This refers to the capacity of the dehumidifier regarding how much area it can serve. The larger the crawl space, the larger coverage area the dehumidifier needs. The coverage capacity of the dehumidifier is also linked to how humid the area is. Moreover, in a sealed crawl space, a dehumidifier will cover a larger area.

Weight and Dimensions

While weight and dimensions may not directly impact its performance, it does impact your overall convenience and comfort. An unnecessarily heavy dehumidifier will take more effort to fit properly in your crawl space, and it will also be inconvenient to move around.

Extra Features

Extra features enhance the performance of the dehumidifier as well as make your experience even more convenient. Such features include a corrosion-resistant build and controls that are easy to read and operate.

Some dehumidifiers also come with multi-functional features such as 2-in-1 dehumidifying and heating systems for both winters and summers.

AlorAir Crawl Space Dehumidifier

Quick Take: Best Crawl Space Dehumidifiers

Review of the Best Crawl Space Dehumidifiers

We have reviewed 6 of the best crawl space dehumidifiers. The market is packed with versatile and varying options for you to choose from, which can make it confusing and overwhelming to pick just one. These in-depth reviews aim to help you in finding and choosing the most appropriate and suitable dehumidifier for a crawl space in your home.

Dri-EAZ F413 Revolution LGR Compact Dehumidifier, Portable, Up to 17 Gallons/Day


  • Compact yet extremely powerful unit that can fit in every space.
  • High performing dehumidifier with high-end extra features, such as the touchpad screen.
  • Lifetime warranty given by the manufacturer gives you a secure and comfortable user experience.


  • There have been complains about leakage.
  • Can be expensive and for those on a budget.

Our Review

The Dri-Eaz dehumidifier is a refrigerants’ dehumidifier that is known for its powerful functionality. It features a capacity of serving an area of 7000 square feet, absorbing 80 pints of moisture every day. These features make it an exceptional dehumidifier for a hotter or humid area.

Another distinctive feature of this unit is its easy-to-read and easy-to-access temperature display, which makes temperature control even easier. It has a display LED screen on the top. It is also equipped with a built-in humidistat. The touch display makes controlling and regulating the temperature an extremely quick and easy task. The best part about this powerful dehumidifier is that even with such extraordinary functions and features, it still comes in a compact size that fits any small space. It weighs about 50 pounds.

It also comes with a built-in automatic pump out functionality that makes maintenance easier. It is backed by a lifetime warranty from the manufacturer, which ensures that your investment is in the right place.

Bottom Line

Overall, the Dri-Eaz is the most reliable and overall the best dehumidifier for crawl spaces. This unit is packed with versatile features and functionality that contribute to its high power and efficient performance. However, if you're on a much smaller budget or only have a small area to cover, then you might want to explore some other options.

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


  • Features a timer function that makes it easier to manage.
  • Built with anti-corrosion material that ensures prevention from leakage issues.
  • Budget-friendly option that comes with all the higher end features.
  • Capacity to cover a large area of 1300 square inches along with good extraction capacity of daily moisture.


  • May not extract as much water as it promises.

Our Review

The AloAir crawl space dehumidifier puts up good competition to many higher end dehumidifiers that are well-performing yet expensive. This dehumidifier is also of equally high quality, yet comes at a rather pocket-friendly price. It has the capacity to cover an area of up to 1300 square feet, extracting 55 pints of moisture every day. It is also functional at temperatures as low as 36 degrees Fahrenheit.

Its durable build is one of its most prominent features since it is coated with epoxy, making it resistant to corrosions and ensuring a long lasting life. It has internal coils coated with stainless steel as well.

Dehumidifiers are exposed to oxidation and extreme moisture conditions, which is why this dehumidifier qualifies as the runner up; its design is extremely durable and well-thought out.

This dehumidifier also does not lack for convenience and comfort thanks to its quick and efficient remote controlled functioning. It has an automatic shutoff functionality after a 24-hour cycle. Moreover, the dehumidifier is also very easy to clean and maintain with its easy-to-remove and slide G3 filter.

Bottom Line

To sum it up, the AloAir crawl space dehumidifier is a good option if you are looking for something powerful and high-quality yet easy on the pocket. However, it may not last you a long as other higher-end powerful models. It features all the essentials and some extra features like timer functionality as well, which make it a solid package at an affordable rate.

Keystone 95 Pint Dehumidifier with Built In Pump KSTAD957PA (Renewed)


  • Has the capacity to cover a large space.
  • Restarts automatically in the event of a power outage.
  • High-end extra features like timer functionality and alarm alerts.
  • Intelligent design that ensures a mess-free hassle-free experience.


  • Unit is quite heavy and has larger dimensions than competitor models.

Our Review

What makes this Keystone dehumidifier unique is that it features upward water extraction functionality. It also comes with a water collection tank with a capacity of 2.6 gallons and can cover up to 6000 square feet, along with the ability to extract 95 pints of moisture every day.

It is also equipped with extra features that ensure comfort and convenience, such as timer functionality and auto shutoff, as well as an alarm functionality that alerts you when the tank is full. This ensures prevention of water leakage and a hassle-free experience for you. The water tank is also transparent and has a level indicator for greater control and easy use.

Another feature of this Keystone unit that contributes to its usefulness is its electric control system. It has a digital LED display that can be used for temperature control purposes.

If you live in a region where there's extreme moisture and a large area to cover, then this Keystone dehumidifier will work perfectly for you. Moreover, there's no hassle of turning it on again in cases of power outages since it restarts automatically.

Bottom Line

In short, this Keystone dehumidifier is packed with all the features and functionality necessary to ensure a positive user experience. Other than its size and weight, everything about this unit makes it seem like a good one to invest in it. It is also very reasonably priced, considering its functionality and performance.

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)


  • Extraction power of 95 pints moisture per day.
  • Remote control system allows ease and convenience.
  • Powerful yet compact design that fits anywhere.
  • Invest with confidence in this corrosion-resistant dehumidifier.
  • Highly recommended for rooms and areas that are large, up to the size of 2600 square feet.


  • More expensive than other models.

Our Review

The AlorAir Sentinel HDi90 dehumidifier is designed specifically for use in basements and crawl spaces. This powerful dehumidifier is equipped with a built-in draining pump and has a capacity covering an area of up to 2600 square feet. It can extract 95 pints of moisture per day. It is a strong and sturdily built unit; not only does it boast corrosion resistant technology, it is also portable and convenient to move around on its four wheels.

It has a low sound production even when operating at high power. Furthermore, it is easy to install, use, and maintain with its quick and efficient connect plugs and 20-inch high pump.

The dehumidifier is also easy to operate with its remote control technology, which makes temperature control and regulation an easy job and requires minimum expertise. Furthermore, it also features epoxy coated coils and body, which ensure durability and long lasting life.

Bottom Line

Overall, the AlorAir Sentinel HDi90 is a great choice to cover a large area with high humidity levels. Moreover, it has a huge capacity and coverage area with features that ensure portability and easy installation. Bear in mind that it is a bit pricier than other equally efficient models. It is a good option if you have a larger budget, although you can find similar features in other more affordable models.

Dri-Eaz PHD 200 Commercial Dehumidifier with Pump, Crawl Space and Basement Drying, F515, Up to 16 Gallon Water Removal per Day, Gray


  • Features a mesh air filter to ensure cleaner air.
  • Extra features include LED display, automatic pump, and humidistat.
  • Capable of operating efficiently in larger spaces and commercial use as well.
  • Powerful, durable, and sturdy dehumidifier that can be used to extract 134 pints of moisture.


  • Large price tag.
  • There have been complaints about leakages.

Our Review

The Dri-Eaz PHD 200 is a commercial dehumidifier that comes with an extraordinary capacity of extracting 134 pints of moisture per day. Its body is housed by a polythene cover that protects it from exposure to moisture, which can lead to rust and corrosion.

Moreover, this commercial dehumidifier features an LED display that ensures highly visible controls even in darker places. This feature makes it extremely convenient to use and operate. The unit drains out moisture and water outside automatically through the pump.

Another prominent feature about this product is the lifetime warranty that comes with its polythene frame, while its parts have a 6 year limited warranty. This will ensure that your investment is in the right place.

Bottom Line

If there's a large space you need to cover or have a crawlspace in an extremely humid region, then this powerful commercial dehumidifier is the right choice for you. Its high price may be a deal breaker considering that there are similar efficient models in the market. However, its powerful performance and large capacity to extract 134 pints of moisture are commendable.

TOSOT 20 Pint 1,500 Sq Ft Dehumidifier Energy Star - for Home, Basement, Bedroom or Bathroom - Super Quiet (Previous 30 Pint)


  • Small size also increases portability.
  • Small sized yet equally efficient model.
  • Features a water tank with a good capacity of 2 gallons.
  • Operations are very quiet compared to other models.
  • LED controls of the dehumidifier will make it extremely comfortable to operate.


  • Does not have a pump.
  • Not recommended for larger spaces.

Our Review

If you have a small area to cover or have a house in a less humid or hot area, then this TOSOT 30-pint dehumidifier will do the job for you. It features a water tank with a capacity of 2 gallons. This small, budget-friendly yet efficient model can cover an area of 3000 square feet, which shows that its size and price should not make you underestimate its performance.

It comes with a 1-year limited warranty, produces a sound output of no more than 52 dB, and has extremely convenient LED controls. The LED controls ensure easy operation and require very little experience.

Moreover, the dehumidifier is also extremely reliable with its energy star certification. The certification ensures that it will be energy efficient and easier on your utility bills. Consider whether a budget-friendly, smaller sized model that will also ensure long-term efficiency is just what you need to control and regulate moisture levels in your home.

Bottom Line

This TOSOT dehumidifier comes with everything ranging from portability, sleek design, and large area coverage to affordability. It is an all-in-one package that you should consider buying if you are looking for an easy-to-operate dehumidifier. However, for commercial use or for use in highly humid regions, we may not recommend this.

Types of Dehumidifiers Suited for Crawl Spaces

There's more than just one kind of dehumidifiers that you can install in a crawl space. The type of dehumidifier you choose to install will depend on how you plan on using the appliance. Here are some commonly found types of dehumidifiers currently on the market:

Refrigerant Dehumidifiers

These are the most common variety. They work by running moist air through cold evaporator coils, causing condensation and collecting the vapors from the air. The dry air is released back into the environment.

Bucket Based Dehumidifiers

Such dehumidifiers collect moisture and water and drain it out into an attached bucket. They require you to clean out the bucket by yourself.

Gravitational Force Dehumidifiers

These dehumidifiers work vertically, depending on gravity to push down the collected water through a hose to a drain. These require minimum supervision and manual control.

Built-in Drain Pump

These dehumidifiers come with a hose and pump, allowing them to drain water upwards and sideways. They allow you to drain moisture and then push along the hose till the drain if the drain is at a distance. These are more expensive, higher-end models.


To wrap it up, we can say that the most important factors that will impact your final decision are your personal preferences and how you plan on using the dehumidifier. Depending on the size of the room and the humidity level, the performance of the unit will also be impacted.

There are several high quality units on the market that are available at budget-friendly prices, so you should explore and go through your choices thoroughly before investing in an unreliable unit. Warranty, area coverage, and leakage protection features are some important considerations.

My name is Bob Wells and I am a retired HVAC tech from Washington state. I am currently retired and no longer do much with HVAC, however, I feel like I have a lot of knowledge in the subject and I wanted to create a website where I could talk about what I've learned and help upcoming HVAC techs. Find more info about me and HVAC Training 101.