ALORAIR Basement/Crawl Space Dehumidifiers Removal 120PPD (Saturation), 55 Pint Commercial Dehumidifier, 5 Years Warranty, Auto Defrosting, cETL, Optional Remote Monitoring

Model : Sentinel HD55

4.9 Average

$648.66 List Price: $1,200.00


The Sentinel HD55 is a perfect device for crawl spaces and basements.  With an updated compact design and smaller size, this unit can be installed very easily in a low clearance crawl space or tight basement. But please don't be fooled by its appearance, it can remove 120 Pints at saturation(55 PPD at AHAM)

Highlights: 5 Years Warranty/ MERV-8 Filter/ Automatic Defrost/ cETL certified/ Optional Remote Control

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Product Overview


AlorAir Sentinel HD55 Conventional Dehumidifier (in White)
Moisture remains the greatest threat to your home’s structural integrity. Increased humidity levels indoors can cause the growth of mold and mildew and an increase in dust mites. These are known allergens that cause respiratory problems and asthma. This is why need to invest in a dehumidifier today.



· Ultra-compact design with super performance
· Adjustable foot pad and portable handle to transport and install easily
· MERV-8 filter to protect internal components from damage from dust and other particles
· Rare earth alloy tube evaporator to avoid freon leakage and prolong the service life of the coil
· Auto defrost technology to allow operation at low temperature (36 degrees Fahrenheit)
· cETL Certified to withstand more rugged conditions 
· Precise humidity maintenance to automatically maintains your ideal humidity level from 36% to 90% 
· Automatic diagnosis system to get troubleshooting tips through error codes
· Gravity drainage for no need to check the tank regularly
· Memory Restart to automatically restart to previous settings after a power outage
· Easy to use graphical control panel
· Optional remote control for remote sensing and control areas
· Hanging kits to reduce noise and vibration



1. Protection from disease - Harmful microorganisms live in high humidity environments and damage the surfaces they reach. Not properly extracted and prevented, they can cause various health risks such as allergies, skin irritation, respiratory illnesses, and immune-related diseases. Another dangerous group that poses health risks is mosquitoes. They also thrive in moist places. They can infect people with nasty diseases like dengue fever or malaria. Fortunately, a dehumidifier helps prevent their growth and harmful effects. 
2. Cost-effective: Buying a dehumidifier is one of the best investments a person can make. It's designed to function optimally and is energy-saving. Plus, it can prevent damage caused by excessive moisture in the long run.
3. Optimal remediation support - Users can be sure they'll get maximum performance to facilitate their remediation work. It's portable, durable, and reliable in the remediation of severe water damage.
4. Protecting property from damage - The place will be inhospitable to harmful microorganisms that could attack your valuables. 
5. Priority safety by preventing structural problems - can primarily prevent accidents if you have a dehumidifier at home that prevents excess moisture from weakening the structure and foundation of your home.  
6. Pleasant workplace - It's been proven that a workplace is positively affected by fresh air to breathe. When you provide perfect ventilation, your employees will be optimally productive and benefit from each other's motivated work ethic.  
More so, all of our dehumidifiers come with a reliable warranty, which you can also read about on this website. If you've any further questions, don't hesitate to contact our customer service representatives. We'll be happy to help you decide on your dehumidifier needs.

Power 115 V/60 Hz
Current(115v/60Hz) 4.1 A
COP(115v/60Hz) 2.4 L/Kwh
Size For Up to 1,300 Sq.Ft.
Filter MERV-8 Filter
Air flow 130 CFM,230 CMH
Sound Pressure Level <52 dBA
Refrigerant R410A
Draining Gravity Draining
Defrosting Control system Automatic Defrosting
Functioning perature Range 33.8-104℉
Functioning Humidity Range 36%-90%
Capacity115V(80ºF-60%)) 55 Pints
Weight 57.3 Ibs (26 kg)
Dim(L x W x H) 19.2×12.2×13.3 in
Shipping Dim (L x W x H) 22.3x16.6x16.4 inch
Loading Quantity 20': 260 Sets ; 40': 565 Sets ; 40'HQ: 678 Sets


How to use Sentinel HD55 Dehumidifier

If you want to optimize the efficiency of the sentinel HD 55 Dehumidifier, you need to do the following:

· Place the dehumidifier on a dry level surface. Avoid putting it on a vapor barrier such as a damp basement.
· Consult the manual when installing the unit
· When you want to switch the unit on or off, make use of the remote control.
· Avoid using the power switch to switch it off.
· Use the arrow keys to set your desired humidity level. Choose anything between 50- 55%.
· Even after the unit has been switched off via the remote control, ensure that you allow the fan to continue running until it stops. It helps to remove the dissipated heat.
· The unit drains itself automatically as it operates. However, if you are planning to keep it in-store, you must give an allowance of at least 10 minutes so that it can defrost. You should lean the drain a little bit to ensure that the unit drains completely.  

When you want to store the unit, the following must be observed.

· Turn off the dehumidifier and allow it to dry
· The power code should be wrapped and secured
· The filter mesh should be protected by covering it
· Ensure the unit is stored in a clean dry place


Where It Can Be Used Application

The unit finds a lot of applications in warehouses, basement, crawl spaces, and even offices. It is also used in shops, storage areas, apartments, and factories. Other places where the unit is likely to be used are in bars and restaurants and museums. It is also widely used in computer rooms to reduce dampness or dust. Sentinel HD 55 is an energy-efficient product that is, CE, ETL.

It is a whole-house dehumidifier that can be relied on to solve damage to any building. If a building suffers from dampness, Sentinel HD55 can be deployed to provide a solution to the humidity problem. The dehumidifier comes with a filter that makes installing it much easier.  The fact that it features optional duct mounting flanges reduces the time it takes to have it installed.


How the Unit Operates

You will select the relative humidity you want. It uses the integral humidistat to monitor the space and conditions. When the humidity level rises beyond the set levels, the unit energizes. When this happens, it draws air across the evaporator coils. Typically, the coils will be cooler than the dew point of the air. Moisture will then condense out of the air.  The remaining air will then be reheated and distributed into the condenser coil. It will then be redistributed in the house.


Installing The Unit

Ensure that you use vapor barriers to seal off the areas that you want to control its humidity levels. If it is the crawl spaces, check and ensure that all the vents are sealed.

Also, ensure that the environment in which you want to install the dehumidifier is not corrosive. Notice that we have some liquid barriers that dry through solvent evaporation. So it is your mandate to ensure that the barrier is dry and that the area is sealed.

Before using the dehumidifier, check and ensure that it is placed on a level surface.  Avoid placing it to a vapor barrier.

Set the desired humidity level using the up and down button.  Choose the most comfortable level for you. It should range from 36-90%. Once you set your point, the machine will stop dehumidifying as long as the setpoint has been reached. When indoor humidity rises above the set level, the machine automatically starts operating.

You can choose to set the machine into continuous mode. This can be done by using the up and down arrow. Check and ensure you see the continuous button illuminate green. It indicates that the unit has been switched to a continuous mode. You will see CO on the display screen.


Cleaning the unit

To optimize the use of the dehumidifier, it is necessary that you clean its body.  You need is a soft piece of cloth to do this. Soak it in water without soap or solvent and use it to wipe the dehumidifier. Also, you may unplug and clean the filter by washing it with soap-less water. Alternatively, you may choose to vacuum the unit.  Just try to ensure that it dries before reinstalling it.  Notice that the coil must also be cleaned once in a year. You may use an approved coil cleaner to do this job.



· Before powering the sentinel dehumidifier, ensure that it is connected using a grounded electrical connection.
· When you choose to have the unit repaired or maintained, ensure that you get a competent technician.
· If you choose to move the dehumidifier to another place, unplug it from the power supply.
· If the unit gets flooded with water, it is recommended that you open it so that it can dry before attempting to reconnect it.
· Don't position the discharge and the inlet onto the wall. Ensure that the inlet has a 12'' space clearance while the discharge should have a 36'' clearance.
· If the unit is close to a wall, ensure that the inlet is parallel to the wall while the discharge should face away from the wall.
· If you choose to clean the unit, ensure that it is unplugged from the power source.
· Don't use the machine as a support when you want to reach items that are high.


Why the need for a dehumidifier?
Huge costs are incurred every year through inflated building maintenance costs and damaged inventory as a result of dampness. ALORAIR dehumidifiers are effective solutions to environmental control problems. Excess humidity in your premises results in corrosion, mold growth, and condensation. By installing an ALORAIR dehumidifier controlled humidity conditions can be maintained to provide protection in larger commercial areas and buildings.

Reviews & Questions

98% of customers recommend this item

95 Ratings
4.9 Average
5 Stars
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It works well. very happy
By 'Ethel East', Reviewed on 2020-10-19 10:00:19
In fact, this is our second. The first one had an accident during transportation and we had to replace it. We started it as soon as we received this device. We like to use a hose and drain it directly into the drain by gravity drainage. They have been running since I started them. They keep things comfortable and the moisture does not drop. They are working at maximum capacity.
Easy to use, get the job done!
By 'Cohen Knox', Reviewed on 2020-10-12 08:50:18
I bought this dehumidifier for my basement, and it is humid all year round, especially in the warm season. I like to set the humidity level to 45. I compared it with some other devices and it seems that its size is slightly smaller. It looks great and adds a modern touch to the room. What I appreciate most is that it is easy to operate. It only has a few buttons, I only set it once, and it has been running for me for several weeks without any adjustments. It is very simple and recommended for homeowners!
Keep my basement dry
By 'Marwa Stevenson', Reviewed on 2020-10-05 08:52:45
Dehumidify the air immediately on the first day the product arrives. My basement smells so much better! I poured 55 pints of water the next day. The machine itself is not as loud as other dehumidifiers I have heard, but it does make some noises, but if you are in a room, you cannot hear it from below. So far, everything is very good! This is a high-quality product and definitely worth the money.
Just what we need!  
By 'Pooja Beltran', Reviewed on 2020-09-28 08:45:22
Great product, I thought our house was dry until my wife bought this dehumidifier. Put it in any room and you will see water draining from the hose, effectively eliminating the moisture in the air without generating annoying noise. like it!
Perfect for our 1000 square foot house
By 'Aiza Porter', Reviewed on 2020-09-21 13:09:49
I like the appearance and quietness of the Sentinel HD55 dehumidifier. My husband uses a hose to drain the water it collects into our underground drain. We are surprised by the moisture drawn from the air. The whole house looks more comfortable, love it!
Good dehumidifier
By 'Nour Naylor', Reviewed on 2020-08-11 08:51:53
Sentinel HD55 works well, covers a large area, and is very quiet during operation. It is smaller than I expected, but this is a good thing because it is not noticeable. It also has a remote control that can remotely control the switch and other settings of the dehumidifier. Although it needs to be purchased separately, I am very satisfied with it.
The dehumidifier that works so far!
By 'Gerald Oneill', Reviewed on 2020-08-03 14:26:50
After reading a lot of online reviews, we finally decided to buy this Sentinel HD55 unit for our basement. Due to the global pandemic of the virus, it arrived at my home later than I expected. Fortunately, the box is intact. On the first day of use, the humidity dropped by about 15%. I didn't have a humidity measuring instrument, just by my feelings, because my breathing was indeed much easier. Overall, I am satisfied with it and if it fails, I will replace it. But now it works fine, which is great.
I don’t know if I need it so much, but I’m so happy to get it!
By 'Wiktor Cardenas', Reviewed on 2020-07-27 13:26:21
We bought it in June of this year because we noticed mold in the basement. Our basement is not big, this 55-pint dehumidifier is just right. I noticed that it runs quietly and the smell of the area where it is used has improved. We did not run it in continuous cycles because the outdoor weather is very warm.
A good tool for basement dehumidification
By 'Macauley John', Reviewed on 2020-07-21 08:12:44
The Sentinel HD55 dehumidifier is worth recommending, and it is definitely worth having one of these devices in your home. It not only runs quietly but also saves more energy compared with similar products. One of my 1,200 square feet basement was damp and moldy, but HD55 helped me dry the entire basement so quickly. If there is a need in the future, I will buy it again.
Should be recommended to family and friends
By 'Hanna Donnelly', Reviewed on 2020-07-13 13:20:31
We have an empty room that has not been inhabited for a long time. There is no ventilation in the room, so it is very humid. Recently, we have guests coming and need to use the room. We purchased the Sentinel HD55 dehumidifier to make the room dry and comfortable. It is very quiet during operation and it really warms the room. My guest was very satisfied with the residence and decided to purchase this equipment for his house to reduce high humidity.


I live in southern Florida, but my house seems very humid. Can I place it where my air conditioning unit can take in air?

Alaina on 2020-09-15 15:12:50

1 Answer

Answered by Alorair
Hello, make sure the Sentinel HD55 dehumidifier is placed on a dry horizontal surface and avoid placing it on a wet surface. Besides, do not place the discharge port and entrance on the wall, make sure the entrance is parallel to the wall, and the discharge port should face away from the wall. Thanks for your question!
I want to place this device close to the wall, how should I place it?

Ashley on 2020-09-08 10:03:12

1 Answer

Answered by Alorair
If the device is close to a wall, make sure that the entrance is parallel to the wall and the drain should face away from the wall.
How much current does the device consume?

Bibi on 2020-09-02 09:24:00

1 Answer

Answered by Alorair
Hello, the Sentinel HD55 dehumidifier consumes 4.1A in a 115V/60 Hz circuit. Thanks for your question!
What is the weight of Sentinel HD55?

Evelina on 2020-08-25 13:34:46

1 Answer

Answered by Alorair
Hello, the weight of the Sentinel HD55 dehumidifier is 57Ibs. Thanks for your question!
What kind of filter does HD55 use?

Courtnie on 2020-08-18 14:12:26

1 Answer

Answered by Alorair
Hello, the Sentinel HD55 dehumidifier is equipped with a MERV-8 filter. Thanks for your question!
What certifications have Sentinel HD55 passed?

Jareth on 2020-08-05 08:24:31

1 Answer

Answered by Alorair
Hello, the Sentinel HD55 dehumidifier has CE, ETL, Energy Star certification. Thanks for your question!
Does the machine have a drainage pump or only gravity drainage?

Sultan on 2020-07-28 16:29:37

1 Answer

Answered by Alorair
Hello, the Sentinel HD55 dehumidifier does not have a pump, it drains water by gravity. Thanks for your question!
Where can I get the user manual?

Helen on 2020-07-22 08:00:51

1 Answer

Answered by Alorair
Hello, the Sentinel HD55 dehumidifier comes with a detailed user manual. Thanks for your question!
The square foot of my house is 1,200 square feet. The whole house grows in my basement. Can Sentinel HD55 work in this range?

Jolie on 2020-07-16 11:53:26

1 Answer

Answered by Alorair
Hello, the dehumidification range of the Sentinel HD55 dehumidifier is up to 1,300 square feet. This fits the size of your house very well. Thanks for your question!
Do I need a dedicated technician to install Sentinel HD55?

Lowri on 2020-07-07 13:22:08

1 Answer

Answered by Alorair
Hello, the Sentinel HD55 dehumidifier is easy to operate and install, you can install it yourself without a technician. Thanks for your question!