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AlorAir Basement/Crawl Space Dehumidifiers 198 Pint (Saturation), 90 PPD (AHAM), Energy Star Listed, 5 Years Warranty, Auto Defrosting System, cETL, up to 2,600 Sq. Ft, Optional Remote Monitoring

Model : Sentinel HD90

4.9 Average

$947.00 List Price: $1,250.00

Sentinel HD90 dehumidifier is designed specifically for crawlspaces and basements. Low noise level, great COP,2.69/kwh, and huge capacity 90PPD at AHAM condition.
Draining Mode: Gravity Draining

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.

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Humidity is the cause of dampness, stuffiness, or odor in the basement or crawlspace. Failure to control the humidity levels with not only cause structural damage like wood rot or wood warping, but will also create the perfect environment for allergens like mold, and mildew to grow.

Most homeowners tend to ignore the humidity levels in the crawlspace or basements, however, research from the American Lung Association has proven that moisture, odor, and allergens in these spaces can easily spread out to the entire house.

Key features

  • Supper COP Energy Star Listed 2.69L/Kwh.
  • Continuous gravity Pipe Drainage.
  • Rare earth alloy Tube Evaporator.
  • Energy star.
  • Automatic Defrosting System.
  • Compatible with Remote Control.  (Notice: sold separately).
  • Ducting options for divided spaces
  • Small – compact and portable.
  • Quick access to the mainboard.
  • Quiet operation.
  • Engineered for low-temperature operation.
  • Laundry mode.


The sentinel HD90 is a high capacity dehumidifier. It is ideal for tight spaces dehumidification. These spaces may include:

  • Crawlspaces,
  • Attics.
  • basements.

This unit is the design and built to stimulate air circulation while operational, this is the main reason the sentinel HD90 is able to produce superior results in this space.

The sentinel HD90, however, offer you a wide range of usability application. The sentinel HD90 is built small – compact and portable with heavy-duty straps for ease of movement. Since this unit can cover a wide space that extends up to 2,600 square feet, it can, therefore, be deployed in:

  • households.
  • Shops.
  • Storage areas.
  • Garages.
  • Restoration work.
  • Industrial institutions.
  • Laboratories.
  • Offices.
  • Restaurants or bars.
  • Museums or sports halls.

Generally, in any space that requires humidity levels to be regulated.

All-purpose use

Capacity. - The sentinel HD90 is able to remove at least:

  • 90 pints of water per day at 115V(80ºF-60%).

This is very impressive comparing the sentinel HD90 is the same size as the Sentinel HD55.

Performance. - The sentinel HD90 is built to provide you with superior results fast. It combines the following features:

  • Air filtration - The sentinel HD90 is equipped with easy to clean filters that are used to trap any mold spores and other Impurities in the air.
  • Auto humidistat - The sentinel HD90 is equipped with an advanced humidity sensor that is able to notice changes in humidity levels in the bypass air design reducing short cycling and saving energy.
  • Quick internal access - The Sentinel HD90 can be easily disassembled in under a minute, for easy service and maintenance.
  • Remote control - The sentinel HD90 will allow you to remotely adjust the dehumidifier settings remotely without having to do it manually on the unit. This makes it easy to control humidity in a tight space. (Sell separately)
  • Plug and play – At Alorair we have built and designed the sentinel HD90 to be an easy plug and play appliance you don’t need to have any technical knowledge to operate this unit. All available installation modes are easy and don’t require a technician.
  • Duct options - The sentinel HD90 allows you to provide focus dehumidification or dehumidification in different space without moving the dehumidifier.
  • Warranty – The sentinel HD90 has an extended 5 years warranty. At our state-of-the-art production facility, our engineer's design and carefully built the Sentinel HD90 to perfection. Every unit is thoroughly tested and proven to 100% effective at lowering humidity levels.
  • Support – At Alorair we have a dedicated support team, that is available efficiently to our customers via email, phone, or live chat. We are dedicated to ensuring that all our customers using any of our products like the sentinel HD90 get instant support when they encounter any challenges.

Make increased indoor humidity a problem of the past! Invest in the sentinel HD90 today!

Power 115V/60HZ
Current 5.56A
COP 2.69L/K
Size For Up to 2,600 sq.ft.
Filter Pre Filter (Optional MERV-8 Filter)
Air flow 210 CFM,350 CMH
Sound Pressure Level <58DBA
Refrigerant R410A
Feet Adjustable Feet
Draining Gravity Draining
Defrosting Control System Automatic Defrosting
Functioning Temperature Range 33~105℉
Functioning Humidity Range 35~90%
Capacity115V(80ºF-60%) 90Pints
Weight 79.6Ibs
Dim(LxWxH) 23.2x15.2x17.7in
Loading quantity 20”:180Sets/40”:412Sets/40”HQ :515Sets

Ratings Summary

98% Recommend this product of 91 responses

91 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: 91 Reviews
We would purchase it again!
By 'Myrna ', Reviewed on 2021-10-13 11:52:35
Our basement was so damp, and we needed a dehumidifier that was a certain height. This dehumidifier was the right size, and we liked and trusted the brand name, so we decided to give it a try. It was easy to set up and is working fine. We have only had it for about a month, but it appears to work well. We have it on the continuous run and draining into a drain in our basement. It is just what we were looking for, and it works so well in removing the dampness from the basement. We are glad we chose this one, and we would purchase it again.
Working effectively!
By 'Rachel ', Reviewed on 2021-10-08 13:26:27
We were experiencing a musty smell in the attic. We called an HVAC technician to fix it, but the issue will return when the attic gets wet. After searching online for a permanent solution was suggested that a humidifier be placed and run periodically over time to avoid moisture buildup. I have mounted this in my attic. It is working effectively in the big attic. Using this for a couple of months and have no odor issues now.
By 'Garrett Hedlund ', Reviewed on 2021-09-26 09:52:24
I purchased this unit for my damp basement. This dehumidifier is the best I have ever had; it's commercial grade. It is placed directly on the floor within reach of a drain. I don't have to think about it any further. The pump allows the water to drain into a sink, positioned higher than the unit, which is excellent. The digital display is easy to read even from across the room. A convenient side panel allows for effortless access when the filters need cleaning or changing. I set the control to the desired humidity, and the unit takes care of the rest. Its also made of corrosion-resistant parts so that it will last many years. But Alorair has an EXCELLENT customer service department. Very responsive to all my emails, and they answer questions thoroughly.
Satisfied with it!
By 'Emma Roberts ', Reviewed on 2021-09-26 09:46:15
We had an issue with moisture in our crawlspace. After reading many reviews, we chose this model. It has been going for close to six months and Moved our humidity levels from a very dangerous high percentage (80ish) to an average consistent level(40ish). Our whole home has a better dryer feel. I would highly recommend this device. We just set desired humidity level and let it do its thing. I did purchase additional filters for this unit. Satisfied with it!
A very smart device
By 'Servant ', Reviewed on 2021-09-13 13:40:53
This commercial-grade dehumidifier has always been an excellent choice for my home. I installed a sewage pump in the garage to control dampness and water leakage, plus the sewage pump to make the space completely dry and hygienic. My garage is now a good place to store and work. It may dry out the ocean, because it is powerful and efficient, and you won’t notice an increase in electricity bills. For those who want a spotless and dry space, this dehumidifier is for you.
low noise
By 'Adele ', Reviewed on 2021-09-08 08:33:33
The place where I live is suffering from this disaster, a lot of floods have entered my home, and I must use this machine to dehumidify. This is a very good machine, easy to operate, very simple to set up, and relatively low noise.
By 'Natalie Miller ', Reviewed on 2021-08-04 09:49:05
Our garage always smells because we don't have a good ventilation system. Especially on rainy or snowy days, the garage is always humid. I did a lot of research before buying this unit and finally got this dehumidifier. Fortunately, the machine did not disappoint me. It quickly dried out my garage and got rid of the smell of mold. I'm so happy! Besides, this machine is easy to install, and I can use it immediately even if I know nothing about mechanical products. I will definitely recommend this product to my friends!
well done
By 'Jude Johnson ', Reviewed on 2021-07-31 09:21:21
We live in a coastal town and have experienced severe mold problems in our house. We noticed our house has a mildew smell in the winter and has mold growing in the basement. So I purchased this one. It arrived quickly and was easy to set up. And when I run this for a few hours I notice it dries out and feels fresh afterward. It amazes me how much water it collects. Very happy with that!
By 'Quentin Jones ', Reviewed on 2021-07-26 09:59:52
Received the dehumidifier within 5 days, I'm very happy to have it. The unit works well, is very quiet, and really keeps our basement humidity down. We started at like 79% humidity, and we are now at about 50%. It’s nice and compact. Doesn’t take up much room. Definitely worth the money so far! GREAT EXPERIENCE HIGHLY RECOMMEND THIS SELLER.
By 'Sophia Hill ', Reviewed on 2021-07-07 08:40:27
This product deserves the title of Energy Star. This dehumidifier will quickly remove moisture from the air without running up my utility bill. In addition, the machine is compatible with Remote Control. Therefore, it is really convenient for me to control.


Questions & Answers
Answered by Alorair
The unit comes with a pump, and it will only extract water when the pump reservoir is full.
Answered by Alorair
It is not safe to use the handle to hang it. The handle is used to carry the unit around but not for hanging. You can use a hanging kit that will support the unit from below.

1 Answer

Answered by Alorair
It will give you an option to dehumidify a different room from where the dehumidifier is.
Answered by Alorair
It can control the unit separately, connect the remote control to another room you want to monitor, and be available in our store.
Answered by Alorair
The evaporator drains moisture into the pump, which drains moisture out of the unit. The pump helps to lift the water up to 5 meters if you are draining upwards.
Answered by Alorair
The unit will still work without the controller.
Answered by Alorair
The air is sucked into the unit from the front panel (black) and blown out on the right side. You need to ensure that the unit has good air following conditions, and the air follows smoothly without being stuck.

1 Answer

Answered by Alorair
The unit has a continuous CO mode, which means it will dehumidify until you turn it off.
Can this be used in my crawl space?

Bertram on 2021-09-06 11:18:00

1 Answer

Answered by Alorair
Yes, if your crawl space can fit in.
Answered by Alorair
Hi Levi, the decibel value of this dehumidifier is below 58 DBA.