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)

4.8 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 (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



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-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 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

95% of customers recommend this item

40 Ratings
4.8 Average
5 Stars
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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.
It's working hard
By 'Frederica', Reviewed on December 27, 2021
I am doing a crawl space encapsulation project, and this dehumidifier has worked as hard as I have. It's been running a little over a week, and it's been squeezing buckets of water out of the air every day. It's been running 24x7 so far, but it should be able to go into cycle mode once I get the air-tight vapor barrier down. I like the size and robustness of the design. The filter is washable, so that is appreciated.
Solid Unit Far Surpassing Major Brand Name dehumidifiers
By 'Elvira', Reviewed on December 24, 2021
Easy setup, relatively clear instructions, appears well designed, solid unit, automatically shuts down based on humidity setting, Quiet and meeting or being Below its claimed dB level. Based on initial use of the past several weeks, I would recommend this unit and would be likely to buy it again.
Excellent dehumidifier!
By 'Samuel', Reviewed on December 24, 2021
This thing is a beast. It pulls a lot of air through it and has done a great job drying out my crawlspace. It makes enough noise that you can hear it when nothing else in the house is on, but otherwise, I never notice it.
Appears to be a quality product.
By 'Philip', Reviewed on December 23, 2021
The product arrived without damage thanks to quality packaging. The unit appears to be industrial rated, has a sturdy metal enclosure. It's been operating for 7 days, doing a great job holding humidity at the set point. If it continues to work without falling over 5 years (it's warranty period), I would easily give it 5 stars.
Looks well made and was very well packed!
By 'Jack', Reviewed on December 23, 2021
I've got a sealed crawlspace under my home that needs dehumidification. I bought this unit because it is short (not a lot of height in the crawlspace) and had a ducted option, which helps me circulate dry air around several large obstructions in the space. The unit was double boxed (dehumidifier w/ 4 foam corner brackets in a box, then that box was padded and inside another box). There was a hole punched in the outer box during shipping, but the inner box was still intact and undamaged. 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. 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 (on a 25" wire, provided with the unit). I was happy with that (it allows me to check on the humidity level and change settings without crawling on my belly to get under the house).
Nice dehumidifier!
By 'Lisa', Reviewed on December 22, 2021
A remote controlling sensor is available with a 25-foot cable to enable full separation from the sensor from the evaporator coil. The unit has a MERV 8 removable filter to keep the coils clean. It is very quiet when operating. The only way to tell if the unit in the crawl space is running is to put my ear against the floor to hear it as the sound is too faint. Additionally, I highly recommend the hanging unit when installing. The rope system minimizes the conduction of vibration, and it raises the unit to get more height when running the gravity drain pipe.
Great well designed unit!
By 'Andrew', Reviewed on December 22, 2021
I finally decided to quit buying junk and started researching crawl space dehumidifiers. Most crawl space dehumidifiers are overpowering for my needs (100 ~ 200 pints per day). The Alorair HD55 is one of the smallest crawl space dehumidifiers on the market. And it is a quality design. This unit has a coated coil (in which the aluminum fins and copper tubing are coated). It is held together with stainless steel plates, protecting against premature evaporator coil failure due to formicary corrosion. Secondly, the humidifier sensor is separated from the evaporator coil and is located on the lower end of the unit to minimize triggering by evaporating moisture from the evaporator coil.
Get this unit!
By 'Myra', Reviewed on December 21, 2021
I was initially terrified to buy a commercial unit for my crawlspace, but the household ones don't last longer than 18 months. I did a lot of research and just wanted an essential resolution to my problem. I'm so glad I got this unit! Initially, experiencing sticker shock, I was afraid to purchase online, afraid it would arrive damaged. But I didn't find this style unit locally, and any other merchant was scarier than Amazon, which always makes things right. This thing was packaged well and a breeze to install. I gave it two hours to rest from shipping before I put it to work. I have a 1200ft crawlspace with partially buried concrete walls and a poorly installed plastic vapor barrier that doesn't cover the entire floor. Humidity was saturated for months at >70%. This unit got the moisture under control in under a day! It's maintained beautifully a month later, coming on about 3x per day. It contrasts the household unit that was 3x-5x per hour. I know there will be energy savings on that alone, and I hope it lasts a long time. I'm irritated I didn't buy this sooner!


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