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AlorAir® Sentinel HD55 Basement & Crawl Space Dehumidifier, Capacity: 55 PPD (AHAM), 120 PPD (Saturation)

Model : Sentinel HD55

4.9 Average

$856.00 List Price: $1,200.00

Moisture Removal Capacity (115V/60Hz): 55 Pints/Day@AHAM (80°F-60%)
120 Pints/Day@saturation (90°F,90%)
Draining Mode: Gravity Draining

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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

  • Compact and Smallest Size.
  • HVAC Remote System.
  • Hot Gas Valve Defrosting System.
  • Ducting options for focus dehumidification.
  • Compatible with Remote Control.  (Notice: sold separately)
  • Coated coils with the stainless side plate.
  • Engineered for low-temperature operation and the air flow issues like the crawl space or attic.
  • Multiple quality certifications.


The Sentinel HD55 is built small compact and portable ideal for tight space dehumidification. With the patent for invention protected. This unit has CE, ETL certification.

The Sentinel HD55 has a wide range of applications including :

  • Crawlspaces.
  • Basements.
  • Storage areas.
  • Offices.
  • Warehouses.
  • Factories.
  • Bars.
  • Restaurants.
  • Museums.
  • Laboratories.
  • Laundry.


All-purpose use

  • Capacity. - The Sentinel HD55 removes at least 55 pints of water per day(AHAM) drawing only 3.6amps. It is also energy efficient able to remove 5 pints per kilowatt consumed. Able to control humidity to a space of up to 1,300 sq. ft.
  • Performance.
  • 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 24/7 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 115V/60HZ
Current(115v/60Hz) 3.6A
COP(115v/60Hz) 2.4L/Kwh
Size For Up to 1,300 sq.ft.
Filter MERV-8 Filter
Air flow 130 CFM,230 CMH
Sound Pressure Level <45 DBA
Refrigerant R410A
Feet Adjustable Feet
Draining Gravity Draining
Defrosting Control system HGV Defrosting
Functioning perature Range 33.8-105℉
Capacity115V(80ºF-60%)) 55Pints
Weight 59Ibs
Dim(LxWxH) 19.2X12.2X13.3in
Loading quantity 40”HQ :792Sets

Ratings Summary

97% Recommend this product of 59 responses

59 Ratings
4.9 Average
5 Stars
500% Complete
4 Stars
400% Complete
3 Stars
NAN % Complete
2 Stars
NAN% Complete
1 Stars
NAN% Complete
Total: 59 Reviews
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!
Working well
By 'Alton Klein ', Reviewed on 2020-09-14 11:15:18
My last dehumidifier worked for about a year and then it started to freeze. I like the lightness and compactness of this unit and saw that it has the function of normal operation at low temperatures, so I decided to give it a try. For the past 5 days, it has been working non-stop and reducing the humidity to the level I want. Will not freeze at low temperatures, it has a hot gas valve defrosting system to ensure continuous operation.
Quiet dehumidifier, very effective
By 'Rick Cartwright ', Reviewed on 2020-09-07 11:17:57
Compared to other dehumidifiers I have owned for years, it seems relatively quiet. The packaging is very good and the installation process is very fast. We use it in a moldy basement of about 1,000 square feet. In less than a week, a lot of water was evacuated from the air, and when I went downstairs, the basement felt very dry. I no longer smell any smell. Overall, we are very satisfied with the purchase.
Ideal for homes and basements
By 'Lucy Currie ', Reviewed on 2020-09-01 11:27:29
This machine is really easy to use, and my family loves it. The Sentinel HD55 dehumidifier is specially designed for low-temperature operation and airflow problems. It is suitable for my basement. We have a monitor which always shows that our indoor humidity is between 65-75%. In the past, we had to rely on moisture absorbents to prevent items from becoming moldy. After running for a period of time, the humidity monitor in our house has shown that the humidity level is dropping. This unit works well, maybe I will also buy an air purifier for my basement. Alorair is trustworthy.
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.


Questions & Answers

1 Answer

Answered by Alorair
Purchase via this link https://www.alorair.com/product-details/alorair-hanging-kits-for-crawl-space-basement-dehumidifiers
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
What is the weight of Sentinel HD55?

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

1 Answer

Answered by Alorair
It weighs 59Ibs.
What kind of filter does HD55 use?

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

1 Answer

Answered by Alorair
G3 filter.

1 Answer

Answered by Alorair
Hello, there is a digital control panel on the top side of the device to set the humidity percentage.
What certifications have Sentinel HD55 passed?

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

1 Answer

Answered by Alorair
This machine has CE, ETL certification.
Answered by Alorair
Gravity drain. Make sure the drain hose slopes downhill all the way.
Where can I get the user manual?

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

1 Answer

Answered by Alorair
The user manual is included with the purchase of this machine.
Answered by Alorair
Yes. The coverage of this machine reaches 1300 square feet.

1 Answer

Answered by Alorair
Sentinel HD55 dehumidifier is easy to operate and install, users can install it by themselves without any problems.
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.
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
Answered by Alorair
It's better to have a separate circuit.

Mercer on 2019-10-07 10:20:29

1 Answer

Answered by Alorair
It would not reset itself since a power outage would amount to turning the machine off or unplugging it.
Answered by Alorair
Yes. There is a digital control panel on the top of the unit to set the humidity percentage.
Continious drain option?

Samera on 2019-08-30 09:28:46

1 Answer

Answered by Alorair
AlorAir® Sentinel HD55 Dehumidifier is gravity draining. It comes with a 2 meters drain hose.

1 Answer

Answered by Alorair
It pumps out about 55 pints of water a day.

1 Answer

Answered by Alorair
Yes, it is certified with ETL, Energy-Star. Thanks.

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