AlorAir Commercial Dehumidifier 113 PPD, with Drain Hose for Crawl Spaces, Basements, Industry Water Damage Unit, Compact, Portable, Auto Defrost, Memory Starting, 5 Years Warranty, Sentinel HD55

Model : AlorAir® Sentinel HD55(Blue)

4.6 Average

$587.48 List Price: $1,200.00


If you want a better dehumidifier for less money, choose the HD55(Blue) for its great value. This Commerical Dehumidifier can remove 113 Pints at saturation, up to 1,200 Sq. Ft, lowering the humidity to a comfortable level in a short period.

Highlights: 5 Years Warranty/ MERV-1 FilterAutomatic Defrost/ cETL certified/ Optional Remote Control

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Product Overview

AlorAir Sentinel HD55 Conventional Dehumidifier (Blue)
This particular unit is considered one of the most chosen types of dehumidifiers for basements and crawl spaces. It is designed to effectively extract all excess moisture from the air to make it inhospitable for harmful entities such as mosquitoes to thrive and bring harm to your family. Moreover, by drying your chosen area, you can be sure to protect your valuables from being destructed by molds.


· Ultra-compact design with super performance
· Adjustable foot pad and portable handle to transport and install easily
· MERV-1 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 temperatures (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



1. Protection from Diseases – Environments with high humidity are where harmful microorganisms live and harm the surfaces they reach. Their small size is often deceiving as they are able to be highly detrimental. Without proper extraction and prevention, they can bring various health risks such as allergies, skin irritations, respiratory illness, and immune-related diseases. Another harmful group that brings health risks is mosquitoes. They, too, thrive in humid places. They have the ability to infect a person with malignant diseases such as dengue or malaria. Fortunately, the use of a dehumidifier is the best-proven way to prevent their growth and damaging effects.
2. Economical and Cost-Effective: Purchasing a dehumidifier is one of the best investments a person can make. It is designed to operate optimally with only a conservative use of energy. Moreover, with its long-term benefits, you are certain to have the most reliable prevention of common damages that take place because of excess moisture. Thus, investing in a dehumidifier saves you both time and money without having to do much.
3. Optimal Restoration Assistance – Because of its superb features and specifications, users are assured to obtain maximum performance to ease their restoration job. It is portable, durable, and very reliable when it comes to heavy water damage restoration projects.
4. Protection of Properties Against Damage – As the dehumidifier creates the most suitable breathing atmosphere for your home, it simultaneously keeps it inhospitable for harmful microorganisms to thrive and harm your valuables. You would not need to worry about molds in your clothes or shoes, damaged electrical wiring, and other related issues that come from excess moisture.
5. Prioritized Safety Due to Prevention of Structural Issues – Accidents can be widely prevented when you have the constant effect of a dehumidifier at home that prevents excess moisture from weakening your home’s structure and foundation.
6. Conducive Work Place for Higher Productivity – It is a proven fact that a workplace is positively affected by its favorable breathing atmosphere. By providing clean and safe ventilation, employees are certain to provide optimal productivity and benefit from each other’s motivated work ethic.

So, whether you are a homeowner or a business enthusiast, investing in a dehumidifier will surely provide you with all these benefits in your daily life.

More so, this and all of our dehumidifiers are supported by dependable warranty coverage.

Power 115 V/60 Hz
COP 2.27 L/kWh
Air flow 120 CFM, 205 CMH
Sound Pressure Level <52 dBA
Draining Gravity Draining
Capacity 113 PPD at Saturation, 53 PPD@AHAM
Size for Up to 1,200 Sq.Ft.
Functioning Temperature Range 33.8~104 ℉
Functioning Humidity Range 36%-90%
Refrigerant R410A
Filter MERV-1 Filter
Dim(L x W x H) 19.2×12.2×13.3 inch
Shipping Dim(L x W x H) 22.3x16.6x16.4 inch
Weight 44 Ibs (20 kg)
Defrosting Control system Automatic Defrosting
Loading Quantity 20': 260 Sets ; 40': 565 Sets ; 40'HQ : 678 Sets"

AlorAir Sentinel HD55 Conventional Dehumidifier (Blue)
If you want a better dehumidifier for less money, choose the HD55(Blue) for its great value. This Commerical Dehumidifier can remove 113 Pints at saturation, up to 1,200 sq. Ft, lowering the humidity to a comfortable level in a short period.

With its ergonomic design that eases its ability for frequent transportation and usage, it's sturdy housing that expertly protects its internal components, and its overall caliber, the Sentinel HD55 Crawlspace Dehumidifier has been one of the top choices for various applications such as:

· Flood restoration
· Furniture Drying
· Carpet Drying
· Laundry Drying
· Painting Projects
· Humidity Control for: Garages/Warehouses/Basements/Crawl Spaces/Shops/Restaurants/Bars/Museums/Sports Hall/Cellars/Offices/Laboratories/Food Storage

Proper Use and Maintenance
Every dehumidifier needs proper usage and maintenance to support its long-lasting capability. Here are some safety tips for using and maintaining it:
· Before using it, keep it steady in an upright position for about 30 minutes to allow the refrigerant and other internal components to settle
· If the unit is newly delivered, let it settle for about 12 hours before using it
· Make sure that your desired area is well-sealed by either shutting all windows, vents or using other barriers
· It must be connected to a grounded electric source to avoid accidents and damage
· Make sure you have the right power supply to avoid electrical issues
· It is not suggestible to use an extension cord as well as a power adaptor
· Use the control panel or remote to set your desired level of humidity
· The surface in which it is set to operate must be leveled and steady
· Do not position the discharge and inlet onto a wall
· Never tamper with the internal components while the unit is running
· Always maintain a 6ft. distance from any form of obstruction
· Avoid deploying it in areas with a high amount of corrosive materials
· Make sure to properly unplug it before deploying it to another area
· Never leave it plugged when not in use
· When cleaning, use a damp cloth dipped in mild soap solution in wiping its exterior
· Remember to check the inlet and outlet for any blockages
· Annually check up the coils for maintenance
· You may use a foaming coil cleaner for cleaning the coils
· Confirm that the cords are cleaned from any debris and are properly wrapped and secured for storage
· Make sure to properly dry it before storing
· If the unit gets flooded, make sure you completely let it dry by carefully opening it before attempting to reconnect it
· Seek professional help for other complex issues
· Never use the unit as a support or stepping stool when reaching high items

Make sure to read the manual and all other guides before using your dehumidifier, or any product for that matter. It is always better to be equipped with all essential information beforehand to reduce the risk of accidents and mishaps.

Reviews & Questions

93% of customers recommend this item

61 Ratings
4.6 Average
5 Stars
500% Complete
4 Stars
400% Complete
3 Stars
NAN% Complete
2 Stars
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1 Stars
100% Complete
Excellent Customer Service

From the Amazon

By 'Tom C.', Reviewed on July 19, 2023
I am revising my review after ALORAIR provided excellent customer service. My HD55 compressor stopped working after two years. ALORAIR went above and beyond their warranty and provided a replacement unit at no cost. I appreciate this, as the reason I bought the unit in the first place was because I was tired of replacing 50/70 Pint units from big box stores after one or two years.

From the Amazon

By 'Derrek Crofford', Reviewed on July 18, 2023
Spray foam house with crazy high humidity in unvented attic. This unit brought my humidity down to 45% in a matter of an hour. Have not noticed a big jump in my electric bill either. Very well made!
Seems well-built

From the Amazon

By 'Larry W', Reviewed on July 18, 2023
Got this to replace previous dehumidifiers that last only a season. My dads old dehumidifier lasted 30 years. Today dehumidifiers all fail. Had Frigidaire, GE and other various units that have lasted about 1 season then quit working. I do not know if they lose refrigerant or if the compressor just goes bad, but they all seem to be the same.. This Alorair HD55 seems like a good unit. It is quiet and ruggedly built. Also, the five year warranty means the company has faith in what they build. So far, it is taking my basement humidity levels from the high 70% down to 51% after running about a week. I am confident I can keep my humidity level down to 40% using this unit. My basement is under a two-story house and not a ranch so it is not excessively big. will update as time goes by.
Really great for crawlspace

From the Amazon

By 'Adam Bean', Reviewed on July 18, 2023
I have had this cycling in a crawlspace for going on 8 months now. It has been super reliable. I rinse the cloth filter and use no rinse coil cleaner o]every so often and it goes and goes and goes. I simply plumbed the drainage out into the grass.
Fast and efficient

From the Amazon

By 'Cobberj', Reviewed on July 17, 2023
I have a large sealed crawlspace and within a 4 to 5 hours this unit dropped the humidity levels down from 65% to 45%. Easy install when using the hanging system. The fan noise level on this unit is also lower than my old unit. I do not normally do reviews but I can recommend this unit to anyone trying to lower humidity levels in a home or crawlspace.
Great product

From the Amazon

By 'Hayden', Reviewed on July 17, 2023
As soon as I set up the dehumidifier in my crawl space, the humidity levels started dropping drastically. My crawl space is 700 sq ft and was at 87% humidity. After an hour, the humidity was down 20%. The next morning it got down to 48%, which was what I set it at. Amazing product
Designed for an area up to 1200 sq ft. Dehumidifies to set humidity. Commercial grade materials.

From the Amazon

By 'Trainman2328', Reviewed on July 15, 2023
I like the way the product works. It looks good and is well constructed. It is a little noisy for a bedroom but I use mine in the basement. I do not know about longevity since I just started using product. It has an optional remote control which I did not buy.
First impressions - very nice dehumidifier

From the Amazon

By 'meep', Reviewed on July 14, 2023
I have installed this in a crawlspace with humidity in the 90s. It appears to be a very nicely made unit, with easy access to internal components for maintenance if needed. There are connection terminals on the side of the unit, perhaps to tie into a sump pump float switch (?) but they are not addressed in the instruction book. Unit is quiet, no louder than a plastic indoor unit - in fact, had I known this I would have gladly used one of these indoors in my last home. Mine has only been operating for 12 hours, but initial impressions are very pleased with the unit.
Noisy but inefficient

From the Amazon

By 'ronnie J', Reviewed on July 14, 2023
It produces an abnormal and irritating noise while it is running. What is worse, it can not remove as much moistures as advertised. It is not what I want.
Great Customer Service

From the Amazon

By 'Slatkin Charles', Reviewed on July 06, 2023
My satisfaction with a product often comes down to customer service and product support. I was very impressed with Aloair customer service related to a technical problem I was having with one of their products. Sam was incredibly responsive and patiently walked me through the process of resolving the problem quickly and professionally. I could not be more pleased.


What if item does not work; who pays for return of item?

Alorair on February 17, 2023

1 Answer

Answered by Alorair
That depends on the data of purchase and the date you want to return it.
We have a baby at home, please tell us the index of dBa, does it affect the sleep of the baby?

Kitty on August 20, 2022

1 Answer

Answered by Alorair
The decibel level of this machine is less than 52, and we recommend that you run the machine in a different room from the one where the baby sleeps.
Should I buy a unit with a condensate pump or not? What is the Difference?

Alice on July 01, 2022

1 Answer

Answered by Alorair
Sentinel HDi90 Crawlspace Dehumidifier with a Condensate pump is for the use of draining upwards or for long distances draining, With a 20’ lifting distance, the condensate the pump gives you the freedom to drain anywhere.Sentinel HD90 and HD55 with Gravity drain system can be applied to the Crawlspace and basement where have a sump pump installed, just leads the hose to the sump pump
I don't care that it has a remote. I only care about controlling it from another system. From a third-party controller that acts as a simple switch?

Vera on December 29, 2021

1 Answer

Answered by Alorair
The unit comes with a terminal that allows you to connect to a thermostat (reach out to the sales team to get the thermostat brand compatible with). Other than the unit's remote control or some A/C thermostat, the unit cannot be connected to any other third-party controller.
I see it listed a white hd55 and a blue hd55 with a price difference between the 2? what is different?

Fay on December 29, 2021

1 Answer

Answered by Alorair
The white HD55 is energy-star rated, and the blue one isn't. The white one has a larger coverage area than the blue HD55.
Can the homeowner install it easily on their own? Or does one need a professional?

Parker on December 28, 2021

1 Answer

Answered by Alorair
The homeowner can install it easily on their own. It is a plug-and-play unit. The unit's warranty will still be valid even if the homeowner installs it.
Are hanging brackets required?

Merle on December 27, 2021

1 Answer

Answered by Alorair
No, we recommended elevating the unit to help the unit drain through gravity.
What is the decibel level?

Bella on December 27, 2021

1 Answer

Answered by Alorair
It is <52 dbA, and it's reasonably quiet.
Can this be used with crawlspace encapsulation and drain right into the sump?

Verne on December 24, 2021

1 Answer

Answered by Alorair
Yes, this unit is gravity drained, and you can drain it right into the sump.

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