AlorAir Basement/Crawlspace Dehumidifiers 198 PPD (Saturation), 90 Pints (AHAM), 5 Years Warranty, Condensate Pump, Auto Defrosting, Rare Earth Alloy Tube Evaporator, Remote Control (optional)

Model : Sentinel HDi90

4.9 Average

$1,147.11 List Price: $1,550.00


AlorAir Sentinel HDi90 dehumidifier with high COP is always a popular choice for large residential and commercial restoration projects! Not only does this unit offer higher efficiency, lower energy consumption ,and more reliability, but it also features a heavy duty condensate pump that makes draining faster and easier.

Highlights: ENERGY SRAR certified/5 Years Warranty/ MERV-1 Filter/ Automatic Defrost/ cETL certified/ Optional Remote Control

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Product Overview


AlorAir Sentinel HDi90 Conventional Dehumidifier 
Another sought-after dehumidifier that is best used for basements and crawl spaces is the AlorAir Sentinel HDi90 Conventional Dehumidifier. It is proven to extract all excess moisture without incurring a high electricity consumption. This makes it advantageous to both you and the environment.


· ENERGY STAR Certified - This unit can remove moisture quickly and efficiently with less energy than traditional dehumidifiers, which can save money and won't increase the energy bill.
· Ultra-compact design with super performance
· Adjustable foot pad and portable handle to transport and install easily
· Optional MERV-8 filter to protect internal components from damage from dust and other particles
· Heavy-duty built-in condensate pump to automatically drain water to any designated location
· 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% 
· Automatic diagnosis system to get troubleshooting tips through error codes
· 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
·  Supply duct optional


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 are 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 on common damages that take place because of excess moisture. Thus, investing on 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 to 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 wirings, and other related issues that come from having 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 a 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 a dependable warranty coverage which you can check out in 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
Current 5.56 A
COP 2.69 L/ Kwh
Size For Up to 2,600 Sq.Ft.
Filter MERV-1 ( Optional MERV- 8)
Air flow 210 CFM,350 CMH
Sound Pressure Level <58 dBA
Refrigerant R410A
Draining Pump Draining
Defrosting Control System Automatic Defrosting
Functioning Temperature Range 33.8~104℉
Functioning Humidity Range 36~90%
Capacity115V(80ºF-60%) 90 Pints
Shipping Weight 70.5 Ibs (32 kg)
Dim(LxWxH) 23.2 x15.2 x17.7 in
Loading Quantity 20': 144 Sets ; 40': 292 Sets ; 40'HQ: 365 Sets

AlorAir Sentinel HDi90 Conventional Dehumidifier

Considering its impeccable features and specifications, this particular unit can be considered very competitive in the market, both for residential and commercial restoration projects. While a traditional dehumidifier, it doesn't shy away from producing the consistently high-quality results that LGR is known for



The AlorAir Storm Ultra LGR commercial grade dehumidifier features an ergonomic design for frequent transport and use, a sturdy housing that professionally protects its internal components, and an overall caliber that has made it one of the first choices for a variety of applications such as:

· Flood restoration
· Furniture drying
· Carpet drying
· Clothes drying
· Paint project
Humidity Control: Garage/Warehouse/Basement/Crawling Space/Store/Restaurant/Bar/Museum/Gym/Gym/Computer Room/Computer Room/Computer Room/Cellar/Office/Lab/Food Pantry


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 can use a foam coil cleaner to clean the coils
· Verify that the power cord is free of any debris and is properly wrapped and secured for storage
· Make sure it is properly dried before storing
If the device is submerged, make sure to turn it on carefully and let it dry completely before attempting to reconnect
· Seek professional help for other complex issues
Do not use the unit as a support or step stool before attempting to reconnect it

Be sure to read the manual and all other guidelines before using your dehumidifier or any related product. It is best to have all the important information ready in advance to reduce the risk of accidents and incidents.

Reviews & Questions

98% of customers recommend this item

90 Ratings
4.9 Average
5 Stars
500% Complete
4 Stars
400% Complete
3 Stars
NAN% Complete
2 Stars
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1 Stars
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This unit is great
By 'Blaine Williams', Reviewed on February 06, 2023
This unit has exceeded expectations. My sealed Crawlspace was averaging 76-80% humidity. It dropped to 55% within 24 hours. 3 days later I’m at 45%. I’m am very pleased. Just a few side notes It does come with a filter and tubing. Which I couldn’t find in any of the descriptions on Amazon.
By 'Wallace', Reviewed on April 09, 2022
What a great way to keep a comfortable environment in your house. Especially if you have a wallboard etcetera you don't want extra humidity. Also when there is extra humidity mold grows and even if you don't see it it will be there in a fine film. Certain times of the year the heater or air conditioner is not removing any moisture and these are the best times to have your dehumidifier going but this one can be on all the time because it has a setting for humidity level where you can set the level you want and it will just come on when it needs to. Also, this one takes up humidity fairly quickly and is a high capacity, and runs fairly quiet. One of the unique features is that when the water tank gets full you don't even have to remove it from the unit. You can use the hose in the back to your out the door or out the window and press the pump button and it will pump the water out for you. This is awesome for older people that just can't work the heavy bucket or people that just don't want to. This machine is an energy star and will save energy compared to other machines. Just an all-around awesome dehumidifier.
Easy and simple to use!
By 'Vera', Reviewed on December 06, 2021
Have recently sealed crawl space, blocking vents, spray foaming the rim band, sealing up any air entry, and ensuring no water issues. It still had humidity around 80%, so I knew I'd need a dehumidifier. This one had all the features I wanted, including a built-in pump. It does remove massive amounts of moisture. Easy and simple to use. It is built extremely well. These are heavy, but that for the workload, this one seems lightweight in comparison.
Happy with this purchase!
By 'Mary', Reviewed on October 13, 2021
The price of this dehumidifier is a little high, so I hesitate to buy it. On the other hand, I couldn't pass up such a good deal if it was accurate. I'm happy to say that so far, the description has been genuine, and exactly it has surpassed my expectations already. The quiet unit has pulled enough humidity out of the air to make my basement much more comfortable and cooler without all that humidity.
By 'Devin', Reviewed on October 08, 2021
This dehumidifier is fantastic. I have been through many dehumidifiers for my basement that has been loud, ugly, clunky, and not working correctly from all the major name brands. This dehumidifier does the job, runs incredibly quiet, and has a sleek design. I'm able to bring guests down to the basement, and they're very curious about what it is, asking if it's an intelligent device, lol. All in all, I'm super impressed by this dehumidifier. It keeps my basement dry and works better than almost every previous dehumidifier I've owned from the big names.
It's rock-solid reliability.
By 'Aidan James', Reviewed on September 23, 2021
It installed this in my crawl space to keep humidity in check in mid-January. It moves a lot of air to get the moisture down in a small confined space in no time. It's also not too loud; even though it is installed very close to a bedroom, it's just barely audible from there. It stopped switching on when the humidity got past its setpoint about a month later. It's rock-solid reliability.
Love it!
By 'Sophie Jo', Reviewed on September 23, 2021
Heavy item arrived well packaged. I installed it in our crawl space per instructions. It immediately began lowering humidity there to my setting of 55%. The most challenging part was leveling due to the uneven floor, but that is crucial for proper long-term running. It is quiet and difficult to hear from the bedroom above where it is installed. It seems easy to maintain, which I plan to do so per the instructions.
Satisfied with this product!
By 'Aro Keto', Reviewed on September 17, 2021
Firstly I’ll say that AlorAir customer service is excellent. I contacted them about getting a 220VAC unit. They helped me order it correctly. When there was a delay in delivery due to the availability of 220V compressors, they informed me, gave me an accurate fulfillment date, and provided some compensation for the delay. It’s only been installed for about a week. And I only yesterday blocked off all of my crawl space vents. It’s been raining for days here. But even with the crawl space vents open, the humidity level in the space dropped from above 75% to about 60%. Since I blocked the ducts yesterday, it’s down to 50% and dropping. And I still have work to do to isolate better my crawl space (the plastic that’s down on the ground is aged and has significant gaps, especially around the sides). So far I’m thoroughly satisfied with this product.
By 'Andrew', Reviewed on September 09, 2021
This Sentinel HDi90 dehumidifier did an amazing job! We live in a very humid place. The room never felt particularly wet, but it does feel warmer now. It's so easy to use. A very low unobtrusive buzz.
Good product and good service!
By 'Tom Jones', Reviewed on August 25, 2021
I did a lot of research before I bought the AlorAir Sentinel HDi90. I wanted the following: 1. small size to fit through the crawlspace door under our cabin. 2. A unit that had remote monitoring capability. 3. A unit with high capacity. 4. A dehumidifier that appeared to be well built and Energy Star rated, and lastly. 5. A good warranty. The AlorAir unit has a five-year warranty. While reviewing possible machines to buy, I contacted AlorAir by email with several questions about the HDi90 and, within 24 hours, had the answers I was looking for it. Good product and good service!


Does the dehumidifier have a built-in overheat protection function?

Franklin on April 22, 2022

1 Answer

Answered by Alorair
This dehumidifier has a built-in overheat protection function. Thanks for your question!
Hose Connection Type. Will a standard garden hose connect directly to the unit?

Barbara on November 24, 2021

1 Answer

Answered by Alorair
It depends on the size. This machine uses a PVC transparent drain hose.
Can this unit take air far from the unit through duck work?

William on November 23, 2021

1 Answer

Answered by Alorair
Yes, but that'll depend on long the duct that you will be using.
Does the dehumidifier have special drainage equipment?

Fanny on November 20, 2021

1 Answer

Answered by Alorair
This unit will come with a drain hose you can connect directly to it.
How high (feet) will the included small plastic hose pump water out from the basement floor? Is the pump to outside continuous?

Meredith on November 19, 2021

1 Answer

Answered by Alorair
This high lift pump is 5 meters, pump purges 14 seconds each time, will keep pump if still have water left inside.
Can I put this in a clean, dry spot in a crawl space, or is a lot of installation prep required?

Hale on November 18, 2021

1 Answer

Answered by Alorair
Yes, you can put it in a clean, dry spot. It is a plug-and-play unit. It would help if you made sure the space was completely sealed for the unit to be efficient.

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