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 an ENERGY STAR 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)

Highlight: 5 Years Warranty/ MERV-8 Filter/ Automatic Defrost/ ETL 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 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
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400% Complete
3 Stars
NAN% Complete
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By 'Tanner Sharma', Reviewed on 2020-04-21 08:23:58
For the past 2 years, I have been using the Sentinel HD55 dehumidifier, and it works really well. Just a few days ago, I recommended this product to my best friend. The manufacturer's service was excellent, and the machine arrived intact.
It is a good idea
By 'Patrycja Kerr', Reviewed on 2020-04-17 08:44:23
I have been looking for a good dehumidifier, and I bought this Sentinel HD55 dehumidifier, it is very good, strong, quiet, and can quickly remove moisture from the air. If necessary, I will repeat the purchase.
easy to install
By 'Marisa Glover', Reviewed on 2020-04-14 15:22:49
We have installed the Sentinel HD55 dehumidifier for our basement, which is small and effortless to install. This is really helpful for our damp basement, like this little guy.
By 'Elle Copeland', Reviewed on 2020-04-10 08:16:36
I encountered water problems in the basement and it was moldy. To solve this problem, I called an experienced expert who quickly installed this 55-pint Sentinel HD55, and in a short time the basement was the driest ever, actually a few degrees warmer than usual, The musty smell disappeared.
I like this dehumidifier
By 'Carley Allison', Reviewed on 2020-04-10 08:11:39
I live in Texas ... it often rains here, so my basement is really damp. Actually, I have a humidity sensor in the basement, so I know that the humidity stays above 80% for a few months. I bought this AlorAir® Sentinel HD55 dehumidifier and made it work within a few minutes. I have worked it for one day according to the instructions in the manual, and the humidity has dropped to about 50% within 24 hours. I like this thing.
By 'Indiana Fraser', Reviewed on 2020-04-02 09:47:19
Some days ago I was searching for a dehumidifier on Amazon and I saw a lot of dehumidifiers are available there. But this AlorAir® Sentinel HD55 dehumidifier caught my eye for its modern features. It has more extra functionality that I needed to handle the dehumidifier properly.
Works well
By 'Amara Woodard', Reviewed on 2020-04-01 10:08:44
I live in a small apartment in a very humid climate. At night, I use this machine in my bedroom for 6-7 hours while sleeping. The machine works great in making my bedroom more comfortable.
Worth the investment
By 'Margaux Singh', Reviewed on 2020-03-25 09:11:09
This AlorAir®Sentinel HD55 has helped enormously to decrease the humidity and water in our basement. Most probably this is the best dehumidifier that I have ever purchased. It keeps the humidity within 50% percent of where it is set at. It runs quiet also. Very happy, and I hope it will last longer than I expect.
This is what I want!!!
By 'Matthew Rowley', Reviewed on 2020-03-19 19:35:18
It works really great! I am amazed at how much water is in the air. I can easily adjust it what humidity I want the room to be. Its small size and compact size make it ideal for basements and crawl spaces.
Nice dehumidifier!
By 'Tobey Franco', Reviewed on 2020-03-16 09:27:48
I bought this machine in the recently renovated basement, where I put a lot of things.Because it often rains, the basement of the scent smells like rotten wood, I am afraid I stored in the basement of the things will be damaged because of too much water, so I decided to buy Dehumidifier, I compared the many Dehumidifier, finally, I choose to buy AlorAir ® Sentinel HD55 Dehumidifier. I'm glad to buy this dehumidifier.It really absorbs a lot of water.Very good product, like it!


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