Best Dehumidifiers for Crawl Space Under Your House

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Written By Thomas Johnson

Licensed HVAC Technician

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People living in humid areas must know that excessive moisture can ruin their house’s wooden framework. In fact, the crawl space is most likely to be affected as it is directly above the moist soil.

And when the crawl space gets too humid, the effects travel up into the entire house. Therefore it is imperative to install the best crawl space dehumidifiers in our homes.

Why Do You Need a Dehumidifier in Your Crawl Space?

These three significant reasons make a crawl space dehumidifier a must:

  • Getting rid of excess moisture: You might be living in a wooden house. If so, humid air is your archenemy. It can significantly weaken the framework of your house. Besides, even if you live in a concrete-made home, the damp odor from your crawl space can be unpleasant. Hence a crawl space dehumidifier is your solution.
  • Keeping the crawl space mold-free: The humid environment of a crawl space is the ideal home for mold and pathogens. Therefore investing in a dehumidifier will also ensure your family’s health.
  • Increasing the comfort level: Humid air makes us feel damp and sticky all the time. It even makes breathing a bit more strenuous. Hence the installation of a dehumidifier might improve the comfort level of your indoor life.

Read Also: Best Air Scrubbers for Your Home

What to Look for When Buying a Crawl Space Dehumidifier

Before opting for a model, we must consider a few variables that will aid our selection process. Here are the four primary parameters one should check before buying the best crawl space dehumidifier:

Coverage Area

The first thing one needs to consider is the crawl space’s size. We must buy a dehumidifier that is built according to our foundation’s size. Otherwise, the unit won’t run as efficiently, and you won’t get your money’s worth.

Therefore, always consider the coverage area. Dehumidifiers’ coverage area usually ranges from 1,300 to 5,000 square feet. So, pick a machine with a coverage area equal to or greater than your crawl space’s size.

Tank Capacity

The humidity differs from region to region. Hence if you live in an area where the moisture is above average, you might need a dehumidifier with a larger tank capacity. This ensures that it doesn’t get full in a single day, and it spares you extra effort.

If you are unaware of the humidity in your locality, buy a humidistat. The device will show a percentage of moisture in the air. Anything above 60 percent is high, and you’ll need a large tank capacity to cope up with it.

Warranty and Budget

Considering the wide variety of options available in the market, you must select a dehumidifier that is cost-effective. Anywhere around the $600-1000 range is a good purchase.

Secondly, you must buy a product that has a decent warranty. As this device will be working 24/7, you want to be cautious. In that case, the guarantee is imperative.

Safe-to-use and Easy Installation

Convenience and safety are two vital pillars of a good purchase. You might buy a product and then struggle to install it. Hence we must consider easy installation at the time of sale only.

Furthermore, a crawl space dehumidifier should be perfectly safe to use. The unit will be under constant stress, and it may heat-up. Therefore, we must investigate these parameters before opting for a specific option.

Read Also: Is Water Collected from a Dehumidifier Drinkable?

Best Crawl Space Dehumidifier Reviews

If you feel a moldy and damp smell in your house, it is probably originating from your crawl space. In such a scenario, dehumidification is a dire need. Hence, the top seven crawl space dehumidifiers will bring the humidity levels to a manageable level.

1. AlorAir Sentinel HD55 Dehumidifier

AlorAir Sentinel HD55 Dehumidifier

The AlorAir Sentinel HD55 crawl space dehumidifier is an all-rounder. It comes in small but sturdy packaging. The metallic body makes this design pleasing to the eye on top of its functionality. This unit might be your best friend if you are looking for effective moisture removal without wasting a lot of energy.

Anti-frost technology dramatically improves its performance. The tech allows the AlorAir Sentinel HD55 to work in temperatures as low as 36 degrees Fahrenheit without stopping even once. It can cover an area of 1,300 square feet, which makes it perfect for small crawl spaces.

Furthermore, if you want convenience, the remote control option will cater to that. The dehumidifier also comes with an Internal Corrosion Prevention technology that makes its life longer. If you are looking for a cost-effective and modern dehumidifier, the AlorAir Sentinel HD55 is our recommendation.

Learn more about the AlorAir Sentinel HD55

2. Dri-Eaz PHD 200 Crawl Space Dehumidifier with Pump

Dri-Eaz Ph.D. 200

The Dri-Eaz PHD 200 dehumidifier comes with a mechanized pump. This feature might be beneficial for those who want to run it 24/7 in their crawl spaces. The reason behind it is that the automated pump can drain the water to an outdoor location without the need for standard human input.

Moreover, this dehumidifier is equipped with a built-in humidistat. Therefore if anyone has a hard time regulating the settings according to the humidity, this might come in handy. The automatic digital controls on the machine make operating it reasonably straightforward.

The rectangular, metal built device is enclosed in a convenient casing equipped with plastic handles. Hence maneuvering it is a child’s play. The PHD 200 is recommended to those of you who are looking for a portable, easy-to-use dehumidifier for a crawl space.

Learn more about the Dri-Eaz PHD 200

3. AlorAir Storm LGR Extreme

AlorAir Storm LGR Extreme

This dehumidifier is encased in waterproof packaging that is aesthetically pleasing too. It is lined with rubber, which makes the electronics safe from any water. On top of that, if anyone is looking for a device that will work proficiently in frigid weather, this might cater to your needs.

The AlorAir Storm LGR Extreme comes with low grain refrigerant technology that makes it usable in weather as low as 33 degrees. If that wasn’t enough, this dehumidifier comes with a massive capacity of 13.4 gallons. Hence if you live in a relatively more humid area, this may spare you the extra work of draining the tank.

We recommend this commercial dehumidifier for a crawl space to all those living in a colder humid climate. It has no significant drawbacks.

Learn more about the AlorAir Storm LGR Extreme

4. Aprilaire E070 Commercial Dehumidifier for Crawl Spaces

Best Aprilaire 1820

The US-made Aprilaire E070 might be your first preference if you are looking for a concise yet efficient device. It comes with all its might in a mini package (only 12.5” high) that is perfect for keeping in crowded, tight places.

The anti-mold property is perhaps its most excellent highlight. The brand promises that the product is effective against mold, fungi, and termites. It keeps the humidity under 60 percent, reducing the survival rate of airborne viruses.

Perhaps the only drawback of this dehumidifier is that it does not come with a pump. Hence it must be placed near the drain as it uses gravity to drain the water. Overall, this unit might be for you if you want a small crawl space dehumidifier that makes the air void of harmful substances.

Learn more about the Aprilaire E070

5. Santa Fe Compact70

Santa Fe Compact70

The Santa Fe Compact70 is a compact yet powerful unit. It features exclusive energy-efficient technology showcasing a high-efficiency model. While this mode is selected, the device can remove 5 pints of moisture per KWH of energy.

Moreover, the metallic exterior of this dehumidifier guards its effective flow-through design. On top of that, if you are wondering about its power consumption, it’s 580 watts. This might interest anyone who is in search of an energy-efficient alternative. Apart from this, it comes with a large coverage area up to 3, 000 square feet. If you own a large house and a vast crawl space, this product might suit you well.

However, this dehumidifier doesn’t come with a built-in pump, restricting its position near the drain. Nevertheless, the brand offers an additional condense pump installed separately to get the job done. We would recommend it if you are looking for a cheaper, more robust dehumidifier.

Learn more about the Santa Fe Compact70

6. BaseAire AirWerx55 Portable Dehumidifier for a Crawl Space

BaseAire AirWerx55

This model could be your ideal choice if you are looking for something quiet and calm. Loud machinery might disturb some people, but this dehumidifier has a maximum sound of 52dB, which is below the loudness considered as noise.

Furthermore, the BaseAire AirWerx55 comes with compact packaging topped off with a sturdy handle. So if you moved it from place to place, that wouldn’t be a hassle. On top of that, BaseAire products come with a 5-year warranty.

If that wasn’t enough, this portable dehumidifier for a crawl space comes with smart anti-frost technology and automatic switching. If you are looking for something along the lines of intelligent AI, this unit might suit you. It has a built-in humidistat that automatically turns on and off depending on the humidity. We recommend this to you if you are looking for a quiet yet efficient dehumidifier that is intelligent. It has no apparent negatives.

Learn more about the BaseAire AirWerx55

7. Dri-Eaz F413 Small Crawl Space Dehumidifier

Dri-Eaz F413

The Dri-Eaz F413 could be a reliable option for you if you deal with a hefty amount of moisture in your crawl space. This dehumidifier comes with a 17-gallon tank. Moreover, it is a compact piece and can fit in places where other commercial crawl space humidifiers cannot reside.

On top of that, you might want a dehumidifier that can restart automatically after a power outage. The Dri-Eaz F413 checks this box as well. The installation process is also convenient as it comes preassembled.

Furthermore, the dehumidifier features a durable build quality equipped with an easy-to-use control panel. Some people may find a complex set of buttons challenging. Hence if you are one of them, you might find this device straight up your alley. This model is ideal for anyone who wants a long-lasting dehumidifier that is easy to use and has a pump to drain water out of their crawl space.

Learn more about the Dri-Eaz F413

Common Questions About Crawl Space Dehumidifiers

The following list features some of the most frequently asked questions about crawl space humidifiers. Give this a read and clear all your doubts.

Can I use a regular dehumidifier in a crawl space?

A dehumidifier made especially for the crawl space under your house may work better than other ones. However, a regular dehumidifier might work well if it matches the dimensions, the humidity, and the temperature of your crawl space.

What are the differences between a crawl space dehumidifier with a pump vs. without it?

A crawl space dehumidifier with a pump can transport the collected water over a longer distance. In contrast, one without a pump uses gravity to drain the water into the collection tank.

Does an encapsulated crawl space need a dehumidifier?

An encapsulated crawl space needs to get rid of the excess moisture. A dehumidifier is a convenient option, while a supply air method is also applicable for a place with insulation.

What size dehumidifier do I need for my crawl space?

The dehumidifier’s size strictly depends on two factors; the area of your crawl space and the amount of moisture present in the air.

Where to place a dehumidifier in a crawl space?

Ideally, you should place your dehumidifier in a location with an open flow to the entire crawl space. The ideal place is also one where drainage is easily possible.

What is the lowest temperature crawl space dehumidifiers can operate in?

Regular crawl space dehumidifiers are designed to work at temperatures above 65 degrees. However, LGR (Low Grain Refrigerant) models are proficient in working under 65 degrees and are best suited for cold areas.

How long does a crawl space dehumidifier last?

If used properly, a crawl space dehumidifier can easily last for around 3-5 years. The timeframe may increase or decrease depending on the workload and on the care taken of the device.