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

Model : Sentinel HD55

4.9 Average

$629.00 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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SAVES YOU MONEY: Since it is Energy-Star rated, this dehumidifier will quickly remove moisture from the air without running up your utility bill. Energy Star appliances are not just better for the environment, they also cost 30% less to operate compared to non-Energy Star appliances.

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.
  • Automatic Defrosting System.
  • Ducting options for focus dehumidification.
  • Compatible with Remote Control.  (Notice: sold separately)
  • Rare earth alloy Tube Evaporator
  • Engineered for low-temperature operation and the airflow 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, Energy Star 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 4.1 amps. It is also energy efficient able to remove 2.4L/kWh 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 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 115V/60HZ
Current(115v/60Hz) 4.1A
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 <52 DBA
Refrigerant R410A
Feet Adjustable Feet
Draining Gravity Draining
Defrosting Control system Automatic Defrosting
Functioning perature Range 33.8-104℉
Capacity115V(80ºF-60%)) 55Pints
Weight 57.3Ibs
Dim(LxWxH) 19.2X12.2X13.3in
Loading quantity 40”HQ :792Sets

Ratings Summary

98% Recommend this product of 104 responses

104 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: 104 Reviews
By 'Michaelia ', Reviewed on 2021-12-13 09:18:26
So far, the HD55 is doing an excellent job in conjunction with a Little Giant condensate pump to lift the discharge to an overhead pipe. The HD55 is quieter than my Frigidaire and does not freeze up (thanks to the HDV defrosting system), and I particularly like the easy access and disassemble modular all-metal construction. It is effortless to get at all the components if I need to repair them. The HD55 is expensive compared to most homeowner-priced units. Still, a bargain when you consider the cheaper plastic ones break down with regularity can be a real pain to take apart, and the cost of replacement parts makes them almost a waste of time to try and fix. I see lots of those in the scrap pile at our local town dump.
Happy with this purchase!
By 'Virginia ', Reviewed on 2021-12-09 09:47:06
I set it up, turned it on, and it worked. The crawlspace humidity is down in the 40s today. When I installed it, we had droplets of water collecting on the duct work, and the insulation on the branch ductwork was soaked in some areas. There were puddles on the plastic covering the floor of the crawl space. Humidity was in the 80 percent relative humidity range at the start. I am happy.
Satisfied with it!
By 'Ava Thomas ', Reviewed on 2021-09-16 09:50:52
I bought this dehumidifier one month ago, and I am satisfied with it! 1. Fan switches off when desired humidity 2. It Looks and feels very solid 3. Compact - helps when you are putting it in crawl space 4. I have used several Brands of dehumidifiers, and they have lasted 2-3 years. I have been using it in my basement and crawl space. For some reason, when I have put this dehumidifier, the smell is much less than what I had previously, even though I set it at the same humidity level. There is a noticeable difference.
Works well!
By 'Alice Wilson ', Reviewed on 2021-09-16 09:39:14
It was installed in a crawl space 30 ft by 30 ft by 4 ft tall. Humidity was at 95% and causing lots of sweating on pipes and started growing mold. It encapsulated crawl space by sealing off vents and laying nine mil plastic across the floor and walls. It has installed a dehumidifier with condensate line draining into septic line with a P trap. Within moments, it started draining considerable amounts of water into a drain line. Humidity levels dropped consistently over the next three days, stabilizing at the 50% set point. It’s only been running a week, and it is relatively quiet. I can’t hear it upstairs, and the remote unit makes it handy to monitor without crawling into crawl space. It did what it was supposed to do, humidity problem solved.
Efficient and quiet
By 'Dark ', Reviewed on 2021-09-13 13:34:41
I ran an Alorair Sentinel HD55 dehumidifier without pipes in my finished basement. The device is robust, efficient, effective and quiet. With a relative humidity of 48%, it runs reliably with a six-point hysteresis, turning on at 51% and turning off at 45%. The separately purchased remote control is located in still air about four feet away from the HD55, and it has a longer and more efficient duty cycle than the onboard hygrostat.
By 'Jacob ', Reviewed on 2021-09-09 10:02:32
This very good machine runs in my basement. It has a small sound and is very quiet. At the same time, it has a high dehumidification efficiency and does not consume too much electricity. It is a very power-saving equipment.
Good job!
By 'Ezra Davies ', Reviewed on 2021-08-28 09:57:53
The AlorAir Sentinel HD55 is much more powerful than the dehumidifiers I buy in the local hardware store before, but it's not designed for huge areas either. That makes it perfect for my damp basement (up to 1,300 sq. ft.). It removes nearly seven gallons (55 pints) every day and can be hooked up to a drainage hose for continuous 24-hour operation. It comes with a two-meter drainage hose, but you can buy a longer one if necessary. All Alorair Professional Dehumidifiers come with a remote control system. It lets you set the desired humidity, so the machine turns itself on and off only when it needs.
Love it!
By 'Ivy Lopez ', Reviewed on 2021-08-27 09:08:46
I installed it on Sunday evening in a crawl space (about 1400 sq ft) at 99% humidity at 76 degrees. By Monday morning, the humidity sensor I put in said 55% at 77 degrees. The unit itself told 60%. This thing has been trucking along, and the drain is constantly running, so I'm happy for now. We will see how it is over the long term. Smell and miserable humidity is basically gone on crawl space over a single weekend. By the way, If you don't get the remote, I would recommend a remote humidity sensor just to keep an eye on humidity percent. Otherwise, I'm really happy with this dehumidifier, and it was a good investment.
Good job!
By 'Clara Hernandez ', Reviewed on 2021-08-27 08:57:42
Easy to operate and effective! We use this dehumidifier (in our restoration business) along with many others from Alorair and love them. They work well, the quality is good, and they are surprisingly quiet. Great for hard to get to places due to compact size and lightweight, but powerful like a bigger unit.Good job!
Happy with that!
By 'Sawyer Smith ', Reviewed on 2021-08-24 10:42:31
I've got a sealed crawlspace that needs dehumidification. The unit was double boxed (dehumidifier w/ 4 foam corner brackets in a box, then that box was padded and inside another box). The unit itself was in perfect condition and started right up. The unit felt very industrial and was well made. I opened it up and took a quick look around. The components were well made, and electrical connections were solid. The filter is easy to remove and reinstall after cleaning. The controls were intuitive. I also bought the additional remote control and was happy with that.


Questions & Answers
Answered by Alorair
Yes, it can be used in the garage. You can leave it in the garage with something well covered for storage. Make sure no dust and rusting.
Is there a way to duct the intake?

Burgess on 2021-12-13 09:33:00

1 Answer

Answered by Alorair
This unit's intake is not duct-able.
Answered by Alorair
It will run until the setpoint is met, then automatically restart when humidity levels rise.
Answered by Alorair
If it is inside the ceiling, it will not dehumidify the space below it. It needs to be placed in the same room that needs the dehumidification. This unit can only be ducted using the exhaust.
Answered by Alorair
It goes to defrost mode more often if the room temperature is below 60F.
Answered by Alorair
Hi Elias! This unit can be set on a shelf up high, make sure it's a flat surface and the drain hose and exhaust are on the sides.

1 Answer

Answered by Alorair
Hi Enzo! We can show you a set of statistics: 2.4L/Kwh, Sentinel HD90/HDi90 current only 5.56A with COP 2.88L/Kwh.
Where is the ALORAIR Sentinel HD55 made?

David on 2021-08-25 05:10:14

1 Answer

Answered by Alorair
Hi, David. We are an American company. Sales and after-sales are in the United States, and some products are manufactured in China.
Answered by Alorair
Hi Timothy, the decibel value of this unit is less than 52 DBA. Don't worry, and it won't affect your sleep.

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