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

$747.11 List Price: $1,200.00

Sentinel HD55 is the star in a line of  AlorAir dehumidifiers 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)

Highlight: 5 Years Warranty/ MERV-8 Filter/ Automatic Defrost/ ETL certified/ Optional Remote Control


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Product Overview


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.

Key features

· Ultra-compact design with super performance
· Adjustable foot pad and portable handle to transport and install easily
· MERV-8 filter to protects 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% 
· Auto restart to remember the settings in case of power failure
· Automatic diagnosis system to get troubleshooting tips through error codes
· Gravity drainage for no need to check the tank regularly
· Auto 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

Warranty – The Sentinel HD55 has an extended 5 years warranty. At Alorair we ensure that all out Sentinel HD55 units are built to meet the highest levels of quality and durability. Every unit is thoroughly tested and proven to be 100% functional before leaving the warehouse.
Support - All our customers enjoy efficient support, thanks to your technical support team via phone, email, or via live support. This ensures that all our customers receive the help they need whenever they encounter any challenges while operating the Sentinel HD55.

Power 115 V/60HZ
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 57.3Ibs (26 kg)
Dim(L x W x H) Dim(L x W x H)
Shipping Dim (L x W x H) 22.3x16.6x16.4 inch
Loading quantity "20”:260Sets 40”:565Sets 40”HQ :678Sets"

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 35-90%. 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 & Queations

98% of customers recommend this item

104 Ratings
4.9 Average
5 Stars
500% Complete
4 Stars
400% Complete
3 Stars
NAN% Complete
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1 Stars
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Effective and quiet
By 'Keegan Soto', Reviewed on 2020-08-24 14:29:31
So far, after a few months, I am very satisfied with Sentinel HD55. I live on the coast, so humidity is a problem. I have been running it in the bedroom, it is a quiet machine. The filter is very easy to disassemble, clean, and replace. In the long run, I think it is worth it!
Excellent dehumidifier
By 'Harrison Mcknight', Reviewed on 2020-08-17 14:21:31
I bought this dehumidifier for the basement, and I bought it instead of letting the basement solutions company install a commercial-grade for $2,000. Within 24 hours after installing this device, my basement dried up and most of the odor disappeared. It has been going on for a week now and I am very satisfied with it. I don’t know about energy efficiency. I didn’t know until I saw the electricity consumption this month. This is an energy-saving device that works well. My only complaint is that it does not have a pump. It drains water by gravity, but it doesn't affect me much.
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.
Trustworthy products
By 'Cinar Stanton', Reviewed on 2020-07-06 14:40:46
When I first received Sentinel HD55, I did not know how to install it. I have never used the same type of product. Fortunately, through the user manual, I understand the installation process, it is very easy to install and set up. I put the drain pipe into the bucket to check if it works, and I'm happy to have nearly half of the water in the bucket in a day.
Pay for quality products
By 'Israr Camacho', Reviewed on 2020-06-29 16:13:16
This is the first dehumidifier in the true sense that I have, and this is the most praised humidity control unit. It works and is very quiet! The dehumidifier products I bought before for less than $100 did not work. For consumers, this is deceiving. Don't try to buy cheap and inferior products cheaply, but buy products that can be used.
Ideal for basement
By 'Usman Parker', Reviewed on 2020-06-22 18:53:16
Due to the arrival of summer, our basement is poorly ventilated, so the air humidity is particularly high. We used to use the same dehumidifier to solve the problem, and this time is no exception. AlorAir® Sentinel HD55 can effectively reduce humidity and remove at least 55 pints of water every day, making it ideal for basement spaces.


What are some of the key features of a Sentinel HD55 Dehumidifier?

Dunne on 2020-06-24 16:33:28

1 Answer

Answered by Alorair
It is fitted with stainless side plates and coated coils. Its defrosting system is designed with the hot gas valve. It has the supper COP.
Can HD55 filter multiple times?

Kayla on 2020-04-27 16:03:59

1 Answer

Answered by Alorair
It is recommended to replace the filter at least once a month, please turn off the power and pay attention to ensure that the filter is dry when replacing.
What size hose for continue draining fit this unite Sentinel HD55 Basement & Crawl Space Dehumidifier?

Rory on 2020-03-11 08:06:57

1 Answer

Answered by Alorair
Please kindly find our hose size for Sentinel HD55: Inside Diameter: 14 millimeters; Outer diameter: 18.5 millimeters.
Does the fan run continuously?

Saima on 2019-11-11 16:14:17

1 Answer

Answered by Alorair
Yes, it needs the continuous operation of the fan to draw air into the dehumidifier
Does this unit (AlorAir® Sentinel HD55) need to have a separate circuit to plug into?

Naya on 2019-10-31 10:17:02

1 Answer

Answered by Alorair
Hello, it is better to plug the Sentinel HD55 dehumidifier into a separate circuit. Thanks for your question!
Does the AlorAir Sentinel crawl space basement being sold have the lastest built-in digital controls?

Murat on 2019-09-29 10:16:57

1 Answer

Answered by Alorair
Hello, there is a digital control panel on the top of the Sentinel HD55 dehumidifier for setting the humidity percentage. Thanks for your question!
How much water is discharged at the end of the day?

Samera on 2019-08-27 13:28:30

1 Answer

Answered by Alorair
Hello, the water removal capacity of the Sentinel HD55 dehumidifier is 120 PPD at saturation condition and 55 PPD at AHAM. Thanks for your question!

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