High humidity is the best friend of mold and mildew. What space in your house gets most humid? It’s the crawl space under your house that can be the breeding ground for mold and cause wood flooring and carpeting to get somewhat moist too. However, with the best dehumidifier for crawl space, you nip this problem in the bud.
Your crawl space may not be the most frequented part of the home, but it’s an important one. For accessing the wiring and plumbing in your house, you will need to go into the crawl space. We all know how often there are problems with plumbing.
As it’s completely enclosed and underground, the crawl space and basement can get dangerously humid. This high humidity is a welcome sign not just for mold and mildew but insects as well. Crawl space dehumidifiers can maintain the humidity at an optimal level.
Top 14 Best Dehumidifier for Crawl Space Reviews in 2021
There is plenty of variety in crawl space dehumidifiers. You can easily find one that’s appropriate for your home’s size. The best dehumidifiers will be made of high-quality materials, deliver reliable performance, and save energy too. Here are crawl space dehumidifier reviews to help you make the right choice:
1. Aprilaire 1820 Pro Crawl Space Dehumidifier
The Aprilaire 1820 Pro is the best dehumidifier for crawl space on account of its quality construction and reliable performance. This product is made in the US by Aprilaire, which is a popular brand from Research Products.
With manufacturing in Minnesota and Pennsylvania, they specialize in humidifiers, dehumidifiers, HVAC, and air cleaners. This dehumidifier contains corrosion-resistant aluminum coils. It’s able to remove up to nine gallons of water in a single day.
Therefore, it helps reduce mold, termites, and odors from the crawl space. The hose is included with the main device. You just have to attach it and keep it over a drain. You can control the level of humidity you want. With the airflow capacity of 200 CFM, it can dehumidify a considerable area.
2. hOmeLabs Energy Star Dehumidifier
This dehumidifier from h0meLabs is an Energy Star certified dehumidifier for crawl space, basement, and even a big-sized room. homelands is a reliable name in the world of home and appliances. Like most of their products, this one is also efficient and user-friendly.
This dehumidifier comes in three sizes: 1500 sq. ft, 3000 sq. ft, and 4500 sq. ft. The 3000 sq. ft one can remove 35 pints of water from the space in one day. It does so in an efficient way, so you do not end up paying large electricity bills.
The home Labs Energy Star is very easy to use. You can set up the humidity level, and it works its 24 hours cycle, maintaining the level set. After this, the tank gets full, and it automatically shuts off. You do not necessarily have to remove the tank every time. You can attach a drain hose to do the job for you. In addition to the humidity level, you can also set the airflow. From normal 165 CFM airflow to turbo 188 CFM, you can choose according to your needs.
3. AlorAir Sentinel HD55 Crawl Space Dehumidifier
The AlorAir Sentinel HD55 Dehumidifier is the best dehumidifier for crawl space, especially in low temperatures. It features a Hot Gas Valve defrosting system that allows it to still dehumidify at a temperature as low as 35 degrees.
This is one of the sturdiest dehumidifiers you will find for your basement or crawl space. With coated coils with stainless side plates, it will last a long time. Moreover, it also has an epoxy coating. This type of strong construction keeps internal corrosion at bay.
Other helpful features include G3 filter, gravity drain, memory start, and auto shut-off. With the remote control, you should be able to set the humidity without getting in the crawl space. However, the remote does not come with the dehumidifier.
As for its dehumidifying capacity, it works at a rate of 50 PPD (Pints per day). There is a 90 PPD variant as well, should you want this for any even bigger house or building. What makes it convenient is that it features automatic draining. You do not have to manually remove water or worry about it leaking.
4. Dri-Eaz F515 PHD 200 Compact Dehumidifier
If you’re looking for a dehumidifier that is compact and portable, the Dri-Eaz F515 PD 200 should be your choice. The small size does not mean it’s not powerful. Dri-Eaz is a Washington-based brand from Legend Brand Restoration, which is known for its equipment and appliances.
Made in the USA, it’s a high-quality product that is recommended by experts. With a built-in humidistat and automatic pump, this will make your life a lot easier. The touch-pad control on this humidifier has four languages, making it very user-friendly. The Dri-Eaz Dehumidifier PHD 200 works non-stop thanks to the automatic pump out feature.
It can remove up to a whopping 16 gallons of water each day. Since it’s size is small, you can easily fit it in the crawl space. The airflow is equally impressive as the moisture removal, coming in at 15,000 CFM. You can collect the water in a floor drain or pump it outside. The ducting options are duct attachment kit F530 and Layflat ducting F268.
5. Dri-Eaz Revolution LGR Commercial Dehumidifier
For large areas like commercial or industrial space, the Dri-Eaz Revolution LGR is the best dehumidifier. With great commercial dehumidifier reviews, this one has the capability of maintaining the right amount of humidity in an area as big as 7000 sq. ft.
It has a built-in humidistat that displays the humidity accurately. You can also see the room temperature on this dehumidifier. The Revolution LGR is powerful enough to remove 17 gallons of water from the crawl space, or any other area where you need to control humidity.
The automatic pump can be used to drain the water into a drain or sink. This can also be used in tight spaces affected by floods. With a weight of 65 pounds, this is more suitable for commercial spaces. It’s too powerful and expensive for domestic use.
Just like other Dri-Eaz products, this one is also made in the USA. The roto-molded housing is quite sturdy and even has a lifetime limited warranty. The compressor and coils have a warranty for six years, whereas other parts have a one-year warranty.
6. Fral FDK54 Dehumidifier Best for Crawl Space
If you want an all-rounder dehumidifier, then go for the Fral FDK54 dehumidifier. This one is quite decent as it can cover an area of up to 1600 sq. ft and work at low temperatures. Not just that, it’s able to dehumidify efficiently without making much noise.
The air quality will improve as well, thanks to the washable filter in this dehumidifier. The digital humidistat will automatically detect moisture and adjust the humidity to the desired level. It can work just as well at low temperatures as it would at high temperatures.
What makes it great value for money is its low energy consumption. With 980 Watts power, it would not use a lot of energy that will help you save money on your energy bills. With continuous drainage, you do not have to bother yourself with maintenance. Even though It’s a heavy product weighing around 70 lb, it is perfect for large basements and crawl spaces.
7. Mounto Compact Crawl Space Dehumidifier
This makes it viable for a commercial or industrial space where maintaining the right level of humidity may be crucial. In terms of area, it can dehumidify an area of up to 7000 sq. ft.
However, it’s size is not that big for a dehumidifier that can remove this much water in this much area. This is why it’s ideal for those who may be pressed for space. You can transport multiple units on a single hand truck. The body is roto-molded and sturdy. The control panel is easy to operate. The pump inside can drain the water automatically.
8. AlorAir Sentinel HDi90 Crawl Space Dehumidifier
AlorAir Sentinel HDi90 Dehumidifier is yet another powerful product. The company specializes in restoration and IAQ equipment. Most of their products have SAA, CE, ETL, and TUV certification. The dehumidifier in question has ETL certification.
The Sentinel HDi90 can work in temperatures as low as 36 degrees. This is because of the hot gas valve defrosting system. Like other dehumidifiers from AlorAir, this one too features high-quality and durable components.
The epoxy coating and stainless side plates, all make it super durable. You can expect it to give you years of reliable performance. More importantly, it has a five-year warranty. Should you run into problems, you can get a replacement. With a G3 filter, it also works to improve air quality. This particular model can remove 90 pints per day. With automatic draining, your life gets even easier.
9. AlorAir Commercial Water Damage Restoration Dehumidifier
When water from floods gets into basements and crawl spaces, it can be quite challenging to get it out. This best dehumidifier for crawl space, with its high extraction capacity, does the job.
The Storm LGR Extreme has a power of 190 PPD, i.e., it can remove 190 pints of water at saturation condition in a 24-hour cycle. The temperature at which it can dehumidify is also quite generous (33 to 105 degrees). The area it can dehumidify is up to 2300 sq. ft. Since its purpose is damage restoration, it’s waterproof. The rubber strip protects the circuitry inside it.
It also features the Hot Gas defrosting system, just like many other dehumidifier models from AlorAir. The power used by this heavy-duty dehumidifier is 640W. This means that it’s energy-efficient too. The epoxy-coated coils ensure there is no corrosion inside the appliance. As a result, the coils last a lifetime. This is CE and cETL certified dehumidifier that is very low maintenance.
10. Aprilaire 1830 Pro Basement Dehumidifier
This is the basement version of the Aprilaire 1830 Pro Crawl Space Dehumidifier. The difference is mainly in its design. In terms of functions and performance, it’s quite the same. For instance, the extraction capacity of this dehumidifier is also 70 pints.
This is made in the US, in Aprilaire’s manufacturing facilities in the Northeast and the Midwest. With corrosion-resistant aluminum coils, it will give you years on end. The 200 CFM airflow allows it to do its job efficiently.
You can just connect a hose to the outlet and forget about it. The water will drain automatically, and the dehumidifier will maintain the humidity at the level you set. The control panel can be mounted on either the top or the side. The body of the basement version is a bit different and bigger. However, you can still place it in a crawl space. The 1830 Pro is quite simple to use, thanks to the control display.
11. Santa Fe Compact70 Dehumidifier for Crawl Space
This is yet another highly energy-efficient dehumidifier. The Santa Fe Compact70 exceeds what is required to be Energy Star certified. Also, it features the MERV-13 air filter, which will improve the air quality of your crawl space in addition to removing excess humidity.
This one has a rotatable exhaust outlet, so it can discharge both horizontally and vertically. The size of the Santa Fe Compact 70 is quite compact, hence the name. With 12 inches height, 12 inches width, and 21 inches depth, it can easily fit in the smallest of spaces.
The power usage is only 580 Watts. You should know that it’s only partially sealed, so it may not be suitable for heavy commercial or restoration use. That said, it can adjust the humidity in an area up to 1800 sq. ft. The 70 PPD is the highest possible setting, which uses more energy. You can normally set it to the normal mode in which it removes 47 pints in a day. In normal mode, it’s removal rate will be 1.9 to 3.9 pints per kWh.
12. BaseAir AirWerx55 Crawl Space Dehumidifier
The BaseAir AirWerx55 Crawl Space Dehumidifier can be controlled with remote control. This makes it ideal for spaces that are normally hard to get to. So even if you have a very small and low height crawl space, you can control humidity with the remote control.
The AirWerx55 can remove 55 pints in a day. The bigger variant can remove up to 140 pints per day. One of the best things about this particular model is the two handles on top. That makes it easier to handle and transport it.
It’s still quite heavy, though, weighing almost 60 pounds. The dent-resistant metal housing makes it virtually indestructible. As for the temperature range, it can work efficiently in 33 to 104 degrees. It uses gravity draining, so you can just use a hose to drain out the water.
Other features include memory start, auto error detection, and low noise. The sound it makes is less than 52 dB, so it will not be a bother even if you use it inside the house. This offers a 60% energy efficiency with an extraction rate of 2.4 liters per kWh. The airflow is 130 CFM, which is acceptable for a dehumidifier of this size.
13. Santa Fe Advance 2 Crawl Space Dehumidifier
The Santa Fe Advance 2 Crawl Space Dehumidifier has many helpful features. With a humidistat and fan control, this one attains the level of humidity you set accurately. It can work at low temperatures and defrost.
This is Energy Star qualified, so it will help save energy and cut costs. Equipped with a MERV-8 filter, it will filter out tiny particles too. The filter is washable, so you do not have to replace it. The Advance 2 space crawl dehumidifier can remove up to 90 pints per day.
You can use it in a crawl space or basement as big as 2,200 sq. ft. Even if there is a power outage, it will start again automatically. Thanks to the filtration, it’s able to work efficiently for hours on end. There is very low maintenance on your part. However, it’s not that portable because of its 100-pound weight. You might need help installing it the first time.
14. Ebac 1139550 Compact Dehumidifier
If you’re looking for something portable, the Ebac Dehumidifier might just be what you need. With the two metal handles, you can easily transport it. Its weight is relatively lower than most dehumidifiers on this list. The Ebac 1129550 weighs 55 pounds.
It can remove 17 pints per day, so it’s essentially for domestic use only. You can fit in tight spaces. The humidistat will automatically adjust the humidity, and you do not have to intervene every time. This one is quite sturdy, made from military-grade steel.
The coils are epoxy-coated to prevent any corrosion. You can expect it to give you a lot of good years, keeping your crawl space and basement dry. When it comes to use and maintenance, you don’t have to worry about any learning curve. The controls are simple, and the readings are easy to understand. You can even install it on your own using the right hardware. The wall mounting brackets are supplied with the product.
Buyer’s Guide for the Best Dehumidifier for Crawl Space
Crawl space dehumidifiers are not cheap, so you have to be cautious when buying one. Think of it as an investment in protecting your home. If you know all the aspects, you will be better able to choose the right dehumidifier. Here’s everything you need to know to find the best dehumidifier for crawl space:
Types of Dehumidifier
For crawl space and basement, there are essentially two types of dehumidifiers:
This type of dehumidifier uses desiccant, which is common for drying. These run damp air through a rotor that contains desiccant, which absorbs the moisture. After the moisture is removed, the dry air is released back into the atmosphere. The vapors from the air are extracted by heating. This moisture is drained out of the crawl space or wherever the dehumidifier is placed.
Refrigerant dehumidifiers are more common in the market as compared with desiccant. The air that enters the dehumidifier passes through a cold coil. This coil cools down the air until it condenses. On condensation, the moisture turns into vapors, which are then removed via a tank or hose. The air that gets released now is much drier, therefore reducing humidity.
Features of Dehumidifiers
These key features and aspects should be your focus when choosing a dehumidifier for crawl space:
This is perhaps the most important thing to consider as it will help you decide which size is appropriate for your house. The extraction rate is the amount of water a dehumidifier can extract from the air in a day. This is usually measured in pints per day, abbreviated as PPD.
This essentially indicates the size of the dehumidifier. Refrigerant dehumidifiers can remove a lot more moisture as compared with desiccant dehumidifiers. You will have to find out what the humidity is like in your crawl space to determine which size you want.
Another measure that determines the size of the dehumidifier is the area it can cover. This is usually indicated by square feet. This is a more convenient measure as it’s easier to measure the area in which you plan on placing the dehumidifier.
Your crawl space is more or less the size of your house. However, if you do not know exactly, you can always measure the area with a measuring tape. Ideally, get a dehumidifier that can cover a bit more area than what your crawl space’s area is.
There is one more thing to consider here, and that is how tightly the crawl space is sealed. If it’s not sealed properly, the dehumidifier will have to do more work. Therefore, you will need a model that offers more extraction and a larger coverage area.
You have probably noticed that almost every dehumidifier has a temperature range in its specifications. This is an important thing to consider because the temperature range it can operate in affects its overall performance. You have to take into consideration how low or high the temperature can get in your area.
Then look for a dehumidifier that can operate within those temperatures. Generally, the dehumidifiers for crawl space work in temperature ranging from 33 degrees to 105 degrees. Refrigerant dehumidifiers generally have a hard time operating in very cold temperatures. Desiccant, on the other hand, are better at dehumidifying even in low temperatures.
Once the moisture from the air is vaporized, it has to be drained away. Older dehumidifiers used to collect the water in tanks or trays. That was a hassle as you would have to empty it ever so often. Today’s dehumidifiers have a connection for the hose so the water can be directed to the nearby drain.
The hose may come with the dehumidifier, or you might have to buy one separately. This allows the dehumidifier to automatically drain and keep running without any interruption, without much need of maintenance.
Running a dehumidifier throughout the day every day can use considerable energy over time. While it does not run bills as air conditioning does, you should be aware of what the running costs could potentially be. This partially depends on the size, too, as bigger models tend to use more energy.
To save on energy consumption and to reduce your carbon footprint, you could opt for an energy-efficient dehumidifier for crawl spaces. It will deliver the same performance but use way less electricity. Some of the models have energy-efficient certifications that indicate their energy-saving performance.
Yes, dehumidifiers do make noise. That is not to say that you cannot find quieter models. But they will most likely be a little bit more expensive. Noise is something you can ignore because you are going to keep this in the crawl space. If the noise is lower than 50 dB, you have nothing to worry about. It would most likely reduce before it reaches inside the house.
Size and Weight
The actual size in terms of inches is also important. Your crawl space is not going to be too roomy. You may even have to place somewhere super congested. Locate where you plan to place it and measure that area and height. You should get one with dimensions that are compatible with that space. You do not want to cram it somewhere either.
Similarly, weight is another consideration, but not as crucial. These dehumidifiers are quite heavy, so you will need help moving them and installing them. However, there is not much moving once you have installed it. If it has handles or wheels, moving it will be a lot easier.
When you are buying something worth hundreds and even thousands of dollars, you would want some kind of guarantee or warranty. Most brands do offer at least one year’s warranty. This will give you enough time to test and see whether it meets your needs and does the job well.
What Size Dehumidifier Do I Need for My Crawl Space?
Dehumidifiers for crawl space come in many sizes with varying capacities. You need the right size to be able to keep the moisture at bay and protect your crawl space or basement from the mold. You need to determine how big your crawl space is and how humid it gets.
Crawl space dehumidifier size is basically the amount of vapor it can remove. This is usually measured in pints per day, i.e., the number of pints removed in a single day. Some dehumidifiers will have this unit in terms of liters or gallons. But you can easily convert those to get the measurement in the units you know.
Another rather simpler way to choose the appropriate size of the dehumidifier is to see what area it can cover. Most models would specify what size of the area they are good for. So for instance, if your house is 3000 sq. ft, you need a crawl space dehumidifier that dehumidifies an area of 3000 sq. ft or more.
Do Dehumidifiers Work in Crawl Spaces?
Dehumidifiers are very common for removing excess moisture from indoor spaces. Just how you use humidifiers to moisten up the indoor space in winters, the dehumidifier does the work of reducing humidity in summers.
That’s for indoor space where humidity changes are not that extreme. However, crawl spaces and basements are a different story, as these areas can get humid even when it’s the dry season. This is because all the moisture gets trapped in, especially in places with a lot of humidity like Florida or Texas.
Too much humidity in these spaces can cause a lot of problems, including mold, mildew, and insects. It can also damage the structure of your home over time. This is why dehumidifiers become essential in crawl spaces.
These are not your regular indoor dehumidifiers; these are a lot more powerful. They can remove tens of pints of moisture in a 24-hour cycle. The moisture gets drained out via a hose or gets collected in a tank or tray.
How Much Does It Cost to Install a Dehumidifier in a Crawl Space?
When calculating the costs of installing a dehumidifier in a crawl space, you have to keep in mind two costs. One is the buying cost of the dehumidifier you choose, and the other is the unit installation cost. The second may include hardware, accessories, and labor costs, should you hire a technician to do that for you. Now, a crawl space heater or dehumidifier can cost anywhere from $800 to $2000.
The cost will depend on the size and capacity of the dehumidifier. Also, some brands can be more expensive than others. As for installation costs, it can be between $400 to $600 based on the professional and his expertise. You can try installing it on your own by following the instructions in the user manual. However, a professional will do a much better job and set your dehumidifier in the best place, so it works at an optimal level.
One reason why you might need to hire someone is that space, where you want to install it, may be difficult to access. Secondly, the dehumidifier can be quite heavy. Most dehumidifiers for crawl spaces can weigh upwards of 30 pounds. It can take up to six hours to install a dehumidifier crawl space, that too if you have every single tool required around you. The user manual should give you all the information you need before installation.
Should a Dehumidifier for Crawl Space Run Constantly?
The performance of a dehumidifier has to be reliable, especially for dehumidifying a crawl space. For this, you may need the dehumidifier on at all times. But that may result in higher energy costs.
Also, you cannot just manually turn it on and off all the time. Fortunately, most dehumidifiers have a humidistat that measures humidity constantly. This means, when the dehumidifier records a desired level, it shuts off on its own. Once the humidity rises, the dehumidifier turns on again and stays on until the humidity level reaches where you have set it.
Crawl spaces can get damp even when the temperatures are low, and it is not that humid outside. So you need the dehumidifier running round the clock at all times. You can turn it off once in a while when your cleaning filter or the dehumidifier itself.
What Maintenance Do Crawl Space Dehumidifiers Need?
Much like any other electronic device and appliance, proper maintenance can go a long way in ensuring it stays functioning for a long time. Same is the case with dehumidifiers. The good news is that these are very low maintenance devices. The maintenance regarding dehumidifiers for crawl space will include:
- Checking and cleaning coils. This should be done once a year. Also, check for frosting in freezing temperatures.
- Cleaning the tanks if the dehumidifier model you have does not drain the water through a hose or drain.
- replacing or cleaning the filters. If the filter is washable, you can simply wash it once a year. If it needs replacing, then simply replace it with a new one.
- Checking on the hose from time to time. Make sure the hose is not blocked or leaking once in a while.
Your dehumidifier’s user manual will give you all the information regarding maintenance. Make sure to read that carefully and follow it closely. This will ensure that the dehumidifier keeps performing at its optimal capacity.
The best dehumidifier for crawl space will pay for itself in the long run. When you safeguard the integrity of your house’s structure, it will last for a long time. You and your family will keep enjoying their home.
Mold and mildew can create havoc in your crawl space. Once they kick in, it can be very difficult and costly to get rid of it. So a dehumidifier is a must if you have a crawl space underneath your home.