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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great! love it!
By 'Frankie Alvarez', Reviewed on 2021-01-11 13:39:24
The best dehumidifier I have ever used. I have a 1,200 square foot basement, and this thing is the champion. Before purchasing this dehumidifier, I didn't think it would lower my electronic bill. In fact, it saves energy costs. I am very happy with this purchase. highly recommended.
Win-win in both price and effect
By 'Mathew Gardiner', Reviewed on 2020-12-28 10:52:10
I have been looking for a dehumidifier for several months, and when I saw this product and price, I thought I would take the opportunity. I am very satisfied with this product. It works well when we use it on a 1,100 square foot area. It is easy to empty and very quiet. I would definitely recommend this product.
I am very happy that I purchased this machine!
By 'Lilian Morton', Reviewed on 2020-12-21 13:12:46
I hate leaks in basement pipes, which make the basement wet and easy to mold. My neighbor suggested that I buy a dehumidifier to solve my problem. This thing greatly helps us reduce the humidity and moisture in the basement. I would definitely recommend this brand. It has some extraordinary features. The important thing is that it is quiet.
Good product
By 'Akeel Whyte', Reviewed on 2020-12-14 09:12:36
I don’t know what should I do without this Sentinel HD55 dehumidifier! Unless you get one of them, you will never know how much moisture is in your home/residence or office! It does not take up much space and is relatively quiet. It has the functions I expect. Therefore, if you have a demand for such products, I will definitely recommend it to you.
Quiet and efficient
By 'Rick Alvarado', Reviewed on 2020-12-07 10:22:40
It makes a humid room feel fresh and comfortable. If you live in a humid environment or the walls of the bathroom condense moisture, I suggest you use this product. It can also help your air conditioner work more easily. It can also be used in the bedroom, your windows will no longer condense in winter. It only makes very low noise and can fall asleep easily.
Great! The musty basement smell is gone!
By 'Aamir Adams', Reviewed on 2020-11-23 13:38:04
In November, our rainfall increased, the sewage pump was never shut down, and the basement smelled of musty. The Sentinel HD55 dehumidifier is delivered quickly and is simple to set up. There is a dehumidifier in the entire basement and the smell disappeared! It only took 1 month, so I can't talk about durability. So far, I am very satisfied with the dehumidifier. It is quiet and efficient.
Working well
By 'Theon Kaur', Reviewed on 2020-11-16 10:19:18
This is the second one we purchased. Can keep the humidity down well. I ran this in the basement. I set it to the desired humidity percentage and turn it on and off as needed to maintain that level. I also installed a clean hose to keep draining water as needed.
Help remove moisture in the basement
By 'Henri Roach', Reviewed on 2020-11-09 10:48:15
Living in Maryland, the humidity there is tiresome. Purchased this dehumidifier for our approximately 1,000 square foot basement. It removes most of the moisture and maintains the humidity level. It is not the quietest device, but as someone who is sensitive to certain noises, I do find the fan here is very soothing and stable. The noise does not propagate upward from the basement, so don’t worry about it disturbing you. To be honest, I don't know how to rate "energy efficiency", but what I want to say is that I haven't seen any significant increase in electricity bills, so I do believe this is an energy-saving device. I really recommend this machine.
Excellent dehumidifier
By 'Maddox Booker', Reviewed on 2020-11-02 10:13:15
The first dehumidifier I own. The operation is very simple. It can remove moisture in my basement and prevent moisture from accumulating on the walls. I like that they come with a drain hose so I can drain the equipment directly to the drain. In short, it is an awesome unit. Easy to move and quiet. It is strongly recommended to use in humid places.
Lightweight and quiet
By 'Jonah Wang', Reviewed on 2020-10-26 10:31:25
I have a three-room apartment. This dehumidifier is very suitable for the size of our house. It can quickly remove moisture. I can see it because it is quiet enough to stay in the room. The product is lightweight and easy to move, I like it. This is my best gift to myself!


What is the working temperature range of this dehumidifier?

Sufyan on 2020-12-15 08:58:37

1 Answer

Answered by Alorair
Hello, the working temperature range of the Sentinel HD55 dehumidifier is between 33.8°F~105°F. Thanks for your question!
What is the sound pressure level of this dehumidifier?

Brielle on 2020-12-08 09:32:30

1 Answer

Answered by Alorair
Hello, the sound pressure level of the Sentinel HD55 dehumidifier is less than 52 DBA. Thanks for your question!
What is the COP of the dehumidifier?

Correa on 2020-12-01 09:46:30

1 Answer

Answered by Alorair
Hello, the COP of the Sentinel HD55 dehumidifier is 2.4L/Kwh. Thanks for your question!
What is the CFM of the device?

Shiv on 2020-11-17 09:10:45

1 Answer

Answered by Alorair
Hello, the air flow of the Sentinel HD55 dehumidifier is 130 CFM. Thanks for your question!
What area range is Sentinel HD55 suitable for?

Trixie on 2020-11-10 10:16:15

1 Answer

Answered by Alorair
Hello, the dehumidification range of the Sentinel HD55 dehumidifier is up to 1,300 square feet. Thanks for your question!
What is the warranty period of the dehumidifier?

Prisha on 2020-11-03 09:18:48

1 Answer

Answered by Alorair
Hello, the Sentinel HD55 dehumidifier has an extended 5 years warranty. Thanks for your question!
What type of refrigerant does Sentinel HD55 use?

Viaan on 2020-10-27 11:47:19

1 Answer

Answered by Alorair
Hello, the Sentinel HD55 dehumidifier is equipped with an environmentally friendly R410A refrigerant. Thanks for your question!
What is the size of the Sentinel HD55 dehumidifier?

Cavan on 2020-10-13 14:26:26

1 Answer

Answered by Alorair
Hello, the size of the Sentinel HD55 dehumidifier is (LxWxH): 19.2 x 12.2 x 13.3 inches. Thanks for your question!
Does the Sentinel HD55 box include a remote control?

Eileen on 2020-09-30 16:43:21

1 Answer

Answered by Alorair
Hello, the remote control of the Sentinel HD55 dehumidifier is sold separately. Thanks for your question!
Where can I buy the suspension kit for this dehumidifier?

Haris on 2020-09-22 16:52:31

1 Answer

Answered by Alorair
Purchase via this link