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)

5.0 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-8 FilterAutomatic Defrost/ cETL certified/ Optional Remote Control

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Product Overview


AlorAir Sentinel HD55 Conventional Dehumidifier (in 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-8 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
· Hanging kits to reduce noise and vibration


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 which you can check out on this website as well. For more inquiries, do not hesitate to contact any of our customer service representatives. We are more than happy to help you make a decision for your dehumidification needs.

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-8 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 57.3 Ibs (26 kg)
Defrosting Control system Automatic Defrosting
Loading Quantity 20': 260 Sets ; 40': 565 Sets ; 40'HQ : 678 Sets"

AlorAir Sentinel HD55 Conventional Dehumidifier (in 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, its sturdy housing that expertly protects its internal components, and its overall caliber, the AlorAir Storm Ultra LGR Commercial-Grade 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/Computer Rooms/Computer Rooms/Computer Rooms/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

100% of customers recommend this item

18 Ratings
5.0 Average
5 Stars
500% Complete
4 Stars
NAN% Complete
3 Stars
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Best Dehumidifier
By 'KP', Reviewed on February 12, 2023
I bought this dehumidifier 2 years ago for a crawl space. It is the most capable and reliable humidifier. I have purchased or replaced many unreliable units in the past. The small size of the unit is another great benefit
By 'Hyman', Reviewed on August 20, 2022
I placed this in the crawlspace of our property as part of a moisture and mold mitigation project (in addition to replacing some rotted framing members and encapsulation). It's been in place for a year now and has been performing superbly. the space is bone dry, causing the mildewy smell to disappear from not only the crawlspace but the house as well. I couldn't be happier. also should mention, that the item arrived with a broken piece of trim. I contacted the company and they replaced it with no problem. good customer service.
Works great!
By 'Vanessa', Reviewed on August 12, 2022
We bought this for our new construction. We had major issues while building and the basement took in a lot of water, so much so that mold grew. We rented a commercial unit for a couple of months during construction but decided we needed to just purchase one once the house was closed up. We had a humidity level of 86 percent, which dropped to the right level after a few days. My husband was very impressed with this unit!
A very wise investment
By 'Travis', Reviewed on August 06, 2022
I have a decent-sized home with a 1500 sq ft finished basement and a garage built on a concrete slab of about 500 sq feet. The concrete in these areas and the basement below ground level create a substantial moisture issue. I have run two dehumidifiers Simultaneously in the past in my basement alone. In comparing the performance, the sentinel amazed me by pulling more moisture in a shorter amount of time and running less often. I will also save on electricity by running one vs. two simultaneously. My mother-in-law lives in our basement, and she is pleasantly surprised with how quiet it runs. I’m very satisfied with the product. The sentinel is lightweight and easy to carry/move. It has a very nice drain hose and easy to-remove / clean filter. One other side note- I’ve had a dehumidifier and other mail packages arrive to me In the past damaged - I highly doubt you will experience this with the sentinel as it is very well packaged. Overall very impressed.
Perfect and is exactly what we needed
By 'Spring John', Reviewed on December 30, 2021
Installed this unit under my mother's house after finding moisture under her house. This unit and some dirt work have taken a typically hot swampy area into a dry, hot area in a very short amount of time. Perfect and is exactly what we needed. I'll be thinking about installing these in the future in my other houses.
A very wise investment!
By 'Sally', Reviewed on December 29, 2021
This dehumidifier puts all those upright residential units to shame. And for what it does, it's not that noisy, but don't expect 'quiet operation' - it's not that kind of equipment - it's meant to do work! My basement will never be damp ever again. Currently, it's emptying into my sump well, and there is almost a continuous flow of water. Thank you!
Gets the job done!
By 'Eden', Reviewed on December 29, 2021
Great dehumidifier. It works excellent without much setup time. Unpack, level, hook up the drain line, power on, and set your desired humidity level. DONE. I really can't believe the manufacture is giving 5-year warranty. Unheard of with most products anymore.
Amazingly efficient dehumidifier!
By 'Parker', Reviewed on December 28, 2021
This unit is heavy-duty, well-made, and commercial grade. We purchased it for a damp basement. And we love how effective and efficient this dehumidifier is. We can't believe the air quality now that it is going in our basement. We are storing things that might get damaged from moisture in the air, which has helped prevent that. And I genuinely recommend this unit.
Faithfully chugs along all day long sucking the moisture out of the basement
By 'Cynthia', Reviewed on December 28, 2021
We've had this unit running for going on 7 weeks now. It's positioned near and above a sink in the finished basement. Despite incredible humidity during this time (it's Virginia in summer, what can I say!), the AlorAir has been reliably coming on and pulling the moisture out of the air whenever the humidity climbs above the 55% that I have it set to. The hose is positioned so it gravity feed from the back of the unit into the sink's base, and occasionally I'll take a look, and sure enough, you can see it draining water while it's running. The air is more pleasant than we experienced when we first looked at the home, so that I can attest to the functionality. I have not yet tried hooking up the separate remote sensor and control unit (I haven't even purchased it yet), so I can't speak to the effectiveness of that system. I also haven't yet been able to judge how much of an extra power draw this is, although we feel it won't be too bad. If it's egregious, I'll update the review later. All in all, I can highly recommend the Sentinel 55.
By 'Alice', Reviewed on December 27, 2021
I have only had it for about 2 months but connected it to my crawlspace via the vent, and so far, it has taken the humidity down from the 90+% range to the 60-70% range. I will install a couple of fans down there to see if I can get the better circulation of the dry air, but this is already a considerable improvement and a way cheaper price than the $3-5K that a professional company wanted to charge for dealing with the issue. It has not increased my power bill by any noticeable amount. Not suitable for small spaces, once you attach a vent/drain and leave sufficient space around the machine intake, you need several feet of room for this. On the plus side, the area you need is around the machine, not necessarily above or below it, so it's ok to fit in shorter crawl spaces and sit nicely on a shelf.


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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