I Tested And Reviewed 10 Best Crawl Space Dehumidifier (2023)

I recently had the opportunity to try out the Bluedeep dehumidifier and I must say, it exceeded my expectations. After experiencing issues with my previous dehumidifiers, I decided to do some research and came across the Bluedeep. Not only does it come with outstanding features, but it also comes at a much more affordable price compared to other brands like Santa Fe.

One of the features that I really appreciate is the auto shut down at cold temperatures. This prevents the compressor from overheating and ensures the longevity of the machine. Additionally, the remote control is a convenient bonus that allows me to adjust settings from a distance.

Last fall, I purchased the 145 pint dehumidifier and I was truly impressed with its performance. I had been struggling with humidity and mold issues in my finished basement and my previous 30 pint dehumidifier wasn't cutting it. The Bluedeep made an immediate impact and effectively brought down the humidity levels.

However, recently I encountered an issue with the machine. The compressor wasn't cooling the coils enough to condense the moist air and I suspected a refrigerant leak. I contacted customer service and they were extremely helpful. They asked me to provide pictures of the compressor and piping, and after confirming the issue, they promptly sent me a new dehumidifier without any hesitation. It's reassuring to know that the company stands behind their product and provides excellent customer service.

In terms of performance, the Bluedeep dehumidifier works exceptionally well in my crawl space beneath my master bedroom. It was able to reduce the humidity from 86% to 55% within a day, which is a significant improvement. While it may be a bit noisier than I would prefer, I attribute this to its installation from the floor joists. As for energy costs, it is still too early to determine, but the benefits of controlling humidity far outweigh any potential increase in energy consumption.

To enhance its performance, I replaced the cheap corrugated hose that came with the unit with a ¾" clear rubber hose. I believe this will help reduce mold and build-up over time, thanks to its smoother design. Since using the Bluedeep dehumidifier, I have noticed a noticeable difference in our sleep comfort and it has alleviated the allergy symptoms we used to experience in the mornings.

I recently purchased this dehumidifier for my basement, and I have been extremely satisfied with its performance. My basement, which is approximately 1300sq ft, now maintains a comfortable humidity level of 55% RH. Here are some of the features that I appreciate about this unit:

Firstly, the dehumidifier is compact in size, making it easy to place in my basement without taking up too much space. Additionally, it operates quietly, with a noise level of around 60-65dB, which is barely noticeable even when I am in the same room. This is a significant improvement compared to other units I have used in the past.

The dehumidifier is also relatively lightweight, considering it has a sturdy metal chassis. This makes it more durable compared to units with plastic bodies. I appreciate the inclusion of a port for a remote humidistat, as it allows me to control the unit from a convenient location even if it is placed further away.

I was impressed with the packaging of the product as well. The foam used for protection was easy to handle and dispose of, without leaving any messy residue. It shows that the company pays attention to detail and cares about the customer experience.

While there are a few areas where this unit could be improved, it is important to note that these are not deal-breakers. For instance, I would have preferred if it had a drain pump, but this was not advertised as a feature, so I can't fault the product for that. It operates on a gravity drain system, which still works well.

In comparison to residential-type units I have used in the past, this dehumidifier is a definite upgrade. It is more substantial in terms of weight, weighing just under 50 pounds, but it is no louder than the residential units I have used. It effectively removes moisture from the air, eliminating the need for continuous cycles and preventing the coils from freezing up. The unit also includes an automatic defrost cycle, which is a convenient feature.

A few observations about the unit overall: the product images on the Amazon page may appear gray, but the unit is actually purple. This might be a consideration if you plan to install it in a visible location. Additionally, the green digital humidistat always displays the current humidity level, even when the unit is powered off. To turn off the humidistat, you need to unplug the unit. The set level of humidity is only displayed when you adjust it using the arrow buttons.

The unit requires a drain for proper operation and cannot be placed directly on the floor. It is recommended to prop it up on cinder blocks or another elevated surface. The blowout from the unit is strong and warm, so it is important to consider the placement and orientation of the unit to ensure that the blowing air does not cause any issues.

The Alorair H55 (Blue) Sentinel dehumidifier is truly one of the best products available on the market today, especially when it comes to its operating capacity. My past experience with dehumidifiers has been quite disappointing, as I have had to deal with multiple failures and poor quality from various manufacturers. I have tried brands like Frigidaire, Friedrich, and Hense, and they have all proven to be unreliable and designed to fail within a short period of time.

One of the main reasons why these dehumidifiers fail is due to their bad design. The evaporator coils, which operate under high pressure 410 Freon, are made with thin copper tubing and packed with aluminum cooling fins. These components, held together with carbon steel plates, are prone to formicary corrosion caused by the dissimilar metals in contact with each other in a damp environment. This corrosion leads to the failure of the evaporator coil within 24 months.

Another design flaw is the placement of the humidity sensor directly in contact with the evaporating coil. This causes multiple false starts for the dehumidifier compressor, as the coil remains wet even after the unit shuts down. The moisture released when the coil dries out triggers the sensor, leading to excessive cycling on and off. Moreover, these units are not repairable and are intended to be disposed of, which is quite wasteful.

Fed up with these issues, I decided to research crawl space dehumidifiers and came across the Alorair H55. Unlike most crawl space dehumidifiers that are overpowering for my needs, the H55 is compact and perfectly suited for my relatively small encapsulated crawl space. Its quality design stands out, with a coated coil that protects against premature evaporator coil failure due to formicary corrosion. The unit is held together with stainless steel plates, ensuring durability.

Another great feature is the separation of the humidity sensor from the evaporator coil. The sensor is located on the lower end of the unit, minimizing false triggering by evaporating moisture. In fact, there is even an option for a remote controlling sensor with a 25-foot cable, allowing for full separation from the evaporator coil. The unit also has a MERV 8 removable filter to keep the coils clean.

On top of its efficient performance, the Alorair H55 operates quietly. It is so quiet that I can only tell if it's running by putting my ear against the floor. Additionally, I highly recommend using the hanging unit installation method, as it minimizes vibration conduction and allows for more effective removal of humidity when running the gravity drain pipe. Placing the unit directly below the floor joists is also more efficient, as humidity rises and can be effectively removed during operation.

The accuracy of the humidity control is impressive as well. While the humidity sensor operates to the nearest 5%, the actual humidity setting can be adjusted within 1% intervals. I have a separate hygrometer sensor in the crawl space, and this unit is able to maintain a steady humidity level of 41% with a variation of only 1% when using the remote controller. When using the sensor on the unit itself, it maintains a steady 40% humidity with no variation. This level of precision is far superior to the other dehumidifiers I have owned, which operated with variations of +/- 5% at a 45% setting.

Although I did encounter some initial problems with the first unit delivered, the support staff was very responsive and arranged for a replacement unit to be shipped to me within two days. They even provided a return label for the defective unit at no cost. It is worth mentioning that it is advisable to save the shipping box for any future returns.

I recently purchased the 65x dehumidifier and I am extremely satisfied with its performance. After some initial setup and adjustments, I was able to get it up and running smoothly. In just under an hour, it effectively reduced the humidity in my test area from 66% to 55%, which was a significant improvement. The noise level of the dehumidifier is surprisingly low, much quieter than a server at work.

For my specific use case, I placed the dehumidifier under my house in the crawl space. I used some stackable legs to elevate it and ran the drain tube outside. Although the instructions advised against using an extension cord, I had to use a heavy-duty 6ft long one to reach a GFI socket. The dehumidifier detected an initial humidity level of 85%, but within 20 minutes, it dropped to 79% and continued to decrease. After spending some time fixing duct work, the humidity stabilized around 69-70%.

I did experience a slight increase in humidity when I opened the crawl space door to gather some wet insulation and trash to dispose of. However, this was quickly resolved once the thunderstorm arrived. I would like to acknowledge the excellent customer service provided by Cyndi, who promptly assisted me when the seller offered a larger, more expensive unit as an alternative. Although I needed a solution immediately, the smaller dehumidifier proved to be sufficient, and I am grateful for Cyndi's assistance.

I had a moisture problem in one of my rental crawl spaces, which caused mold growth. However, after using this dehumidifier for only a few days, the moisture level dropped significantly, and it seems like the problem has been resolved. I highly recommend this dehumidifier, as it may be small in size but does an amazing job.

Initially, I encountered an issue with the first dehumidifier sent to me, as it kept stopping working. However, upon contacting the company, they informed me that this particular model had a known problem and promptly sent me the next model up. The replacement dehumidifier is working perfectly without any issues. It is installed in the crawl space below my master bedroom and operates quietly enough that I cannot hear it at all.

I had been dealing with persistent high humidity in my unfinished basement, which resulted in an unpleasant odor. After conducting some research, I realized that I needed a dehumidifier to lower the humidity level. I decided to purchase this dehumidifier, and within the first two days of using it, we noticed a significant difference. The humidity dropped from 82% to a low 40% range. I highly recommend this dehumidifier for anyone facing similar issues in their basement.

The dehumidifier in question is highly praised by users for its exceptional quietness. The airflow produces a minimal amount of noise, with the compressor barely audible. This is a significant advantage for those who value a peaceful environment.

Another standout feature is the unit's quick response in displaying indoor humidity levels. Users appreciate its intuitive controls, making it easy to operate. Despite its outstanding performance in removing water from the air at a capacity of 113 pints per day, the dehumidifier remains compact. This is especially noteworthy when compared to larger consumer-grade dehumidifiers commonly found in big box stores.

The build quality of the dehumidifier is also highly regarded, leading users to believe that it will serve their homes for many years to come. However, it is important to note that the absence of a water tank means that the water outlet must be directly routed to a drain. Additionally, the unit is quite heavy, which may be a consideration for some users.

One user from Florida, where the humidity can be high, mentions that the dehumidifier effectively reduces the heat in their shop by removing excess moisture from the air. They are satisfied with its performance, even though they are not concerned about its efficiency.

Another user highlights the superiority of this dehumidifier compared to residential units. They replaced three residential units with this one, which not only saved them on electricity but also significantly reduced the noise level. The unit's small footprint and the option to hang it are additional advantages. They also mention that adding a condensate pump allows for easy mounting on the floor, even in hard-to-reach areas. For added convenience, the manufacturer offers a wired remote control unit for checking or changing the dehumidifier's status.

Lastly, a user who operates a restoration business highly recommends this dehumidifier. They utilize at least six units daily for various purposes, including basements, garages, crawlspaces, and residential losses. The quiet operation and excellent performance make it an ideal choice for their business needs.

I have been using the Alorair dehumidifier in my restoration business, and I must say it has been easy and effective to use. Along with other Alorair dehumidifiers, this one stands out for its good performance and quality. It is surprisingly quiet, making it suitable for hard-to-reach places. Despite its compact size and lightweight, it is as powerful as a larger unit.

I have personally been using the HD55 model for six months now, and I am highly satisfied with its performance. I have been using it in my unheated basement, which tends to have high humidity levels. This was particularly concerning for me as I store valuable LPs there. However, the HD55 has successfully kept the humidity below 50% without freezing up, even during the winter when the basement temperatures drop to 40F.

Previously, I had a plastic 70-pint Frigidaire dehumidifier, which tended to freeze up and draw a lot of current. The HD55, on the other hand, operates quietly and does not freeze up, thanks to its HDV defrosting system. I appreciate the easy access and disassembly of the modular all-metal construction, which makes it convenient for repairs if ever needed.

I understand that the HD55 may seem expensive compared to other units in the homeowner price range. However, considering the regular breakdowns and difficulty in taking apart cheaper plastic units, the HD55 proves to be a worthwhile investment. I have seen many of those cheaper units in the scrap pile at our local town dump.

I recently completed a DIY crawlspace encapsulation, and the dehumidifier played a crucial role in removing moisture from the air and wood. In the initial days, it ran almost constantly, as shown in the attached screenshot of the electricity usage. At first, I was concerned about the cost of running the dehumidifier, but as the crawlspace dried out, the dehumidifier had to run less frequently. As seen from the graph, there were even days when it didn't need to run at all.

Although I have only had the dehumidifier for a month, I am already satisfied with its performance and efficiency. It has proven to be a reliable unit for my needs. I understand that some people have experienced failures after a year, so I remain cautious. However, as of now, I am happy with my purchase.

I recently purchased the Commercial Dehumidifiers 145 Pint for my basement, and I am incredibly impressed with its performance. This dehumidifier is highly efficient at removing excess moisture from the air, resulting in a significant improvement in the overall comfort of my basement.

One standout feature of this dehumidifier is its memory starting function. This means that in the event of a power outage or accidental unplugging, the unit will automatically restart with the same settings once power is restored. This feature has been incredibly convenient and has saved me a lot of hassle.

The Commercial Dehumidifiers 145 Pint is perfect for larger rooms or even entire homes. With its 145-pint capacity, it is well-suited for industrial or job sites, as well as crawl spaces, garages, attics, and basements. In fact, it has effectively eliminated musty odors and prevented mold growth in my basement.

Another great aspect of this dehumidifier is its auto defrosting feature. This ensures that the unit operates smoothly and efficiently even in colder temperatures, making it suitable for those of us who live in colder climates.

I purchased the ALORAIR dehumidifier three years ago for my freshly sealed crawl space. It is a commercial unit and I have been extremely satisfied with its quality. I hung the unit from the floor joists using isolation straps to minimize noise and vibration. For the majority of the three years, the dehumidifier has worked flawlessly, effectively maintaining the desired humidity level in the crawl space.

However, about two weeks ago, I noticed that the humidity in the crawl space started to rise above the set threshold. Using my lacrosse weathers station with a sensor in the crawl space, I discovered that the dehumidifier displayed an "E5" error on the console, indicating a refrigerant leak. Initially, I suspected that this was the issue, but upon further investigation, I realized that it was something else causing the cyclic behavior of the unit.

I contacted ALORAIR for assistance, and their customer service representative, Sam, was quick to respond. Sam guided me through the troubleshooting process, and after providing them with the requested information, they determined that a coil sensor was faulty. ALORAIR promptly sent me a replacement sensor, and with just 15 minutes of my time, I was able to replace it myself. The dehumidifier is now back under the crawl space, functioning perfectly as it was designed to do. Throughout the entire process, ALORAIR maintained excellent communication with me, even following up after I replaced the sensor. I am truly impressed with their level of customer service and support. Thank you, Sam!

On a separate note, I also purchased another ALORAIR dehumidifier for my basement, intending to use it for residential purposes. It has effectively kept the basement dry, and I have not experienced any moisture issues. The unit consistently maintains the humidity level at around 48-52%, which is acceptable for me, considering the hot and humid Minnesota summers.

One significant improvement I noticed with this dehumidifier is its energy efficiency. With my previous dehumidifier, my energy bills skyrocketed when using it in conjunction with my central A/C unit. However, with the ALORAIR dehumidifier, I have observed a significant reduction in energy consumption. It is far more efficient than my old unit, which required daily emptying.

While the dehumidifier offers Wi-Fi connectivity for monitoring purposes, I have not found the need to use this feature. Once I set the desired humidity level, the dehumidifier functions autonomously, automatically turning off when the set humidity is reached. There is no need for constant monitoring or adjustment.

I recently purchased this dehumidifier and I must say, I am thoroughly impressed. It has exceeded my expectations in terms of performance and functionality.

Firstly, one of the standout features of this dehumidifier is its quiet operation. I have it placed in my bedroom and I can barely hear it running. This is a huge plus for me as I am a light sleeper and noise can be quite bothersome. Additionally, I have noticed a significant reduction in moisture on my windows during the winter season. This dehumidifier has effectively eliminated condensation, making my bedroom a much more comfortable space.

In terms of size and capacity, this dehumidifier is perfect for small rooms. It doesn't take up much space and the tank size is adequate, meaning I don't have to empty it every day. The low sound it produces is more like a gentle hum, which is hardly noticeable.

Furthermore, I recently embarked on a new adventure of living full-time in an RV. As a newbie to RV living, I quickly realized the importance of managing moisture levels in such a confined space. This dehumidifier has been a lifesaver. It effectively removes excess moisture from the air, preventing water from running down the windows. Its compact size is ideal for limited space in the RV.

Another feature worth mentioning is the child lock feature, which is a unique addition that I haven't seen in other dehumidifiers. This provides an added layer of safety and peace of mind, especially when there are children or pets around.

Setting up the dehumidifier was a breeze. I was able to easily attach the included drain hose, allowing the water to drain directly into my kitchen sink. The machine also has a built-in sensor that detects humidity levels and automatically adjusts its operation to maintain the desired humidity level. This has been a game-changer, especially with multiple people showering and cooking in the RV.

I recently purchased the dehumidifier unit for my crawl space after my exterminator recommended it to reduce humidity. Living in Eastern North Carolina, humidity is a constant issue, and my floor insulation was starting to deteriorate. After sealing my foundation vents, I decided to install this unit myself instead of hiring a professional.

The installation process was straightforward, and as soon as I turned on the unit, it started working immediately. Within two days, the relative humidity in my crawl space dropped from 88% to the set-point of 55%. I have since lowered the set-point to 50% RH, and the unit effortlessly maintains this level. One of the best features is that I can't even hear the unit running from inside the house.

Although I initially hesitated to spend the money on something like this, I am extremely pleased with my purchase. The unit seems to be well-built and durable, and it has exceeded my expectations so far. While I would have preferred to spend the money on something more exciting, like a new TV, I know that investing in reducing crawl space humidity is essential for maintaining the integrity of my home.

In terms of installation, I set up the unit in the middle of the crawl space and connected the condensate drain line to the sewer outflow pipe. I used a wireless hygrometer to monitor the humidity level, and it's been fascinating to see the unit turn on and off in response to fluctuations. The average hourly relative humidity in the first month of operation was 52.6%.

What makes this purchase even better is the fact that I saved over $1000 by installing it myself, compared to what a crawl space encapsulation company would have charged. I had to seal up the crawl space vents, but I found affordable heavy-duty plastic vent covers online for just $10 each.