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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 82 responses

82 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: 82 Reviews
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.
Just what I needed
By 'Muhamed Wickens ', Reviewed on 2021-04-15 10:58:32
We live in a high humidity state and had our basement in a desired relative humidity percentage in a short time. The unit automatically shuts down in the reservoir is full and it is very simple to convert and use with a drain as well. The unit is sleek in design and quieter than I expected.
Improving air quality
By 'Marwan Blair ', Reviewed on 2021-03-29 10:34:48
This is a very perfect machine that allows me to breathe clean and dry air every day. is rainy in autumn. wake up every morning, my bedding and body feel sticky. With this machine, the air in the room becomes refreshed and comfortable. like feel full energetic, perfect
Easy to use, get the job done!
By 'Patsy Fields ', Reviewed on 2021-03-15 15:52:02
The air was immediately dehumidified on the first day of arrival. My basement smelled much better after a few days! The machine itself is not as loud as other dehumidifiers I have heard, but it does make some noise. It is easy to operate, it has only a few buttons, I only set it once, and it has been running for me for several weeks without any adjustments. So far, so good! This is a high-quality product and definitely worth the money.
Good product! Compact and quiet
By 'Ashraf Chan ', Reviewed on 2021-03-08 16:44:12
So far, so good. It works normally, runs quietly and drains well. It keeps our basement dry and we are happy to find this product because there are not many sophisticated dehumidifiers on the market today. If you need a good dehumidifier, this is a good choice! I would recommend this brand and model!
Amazing product, quiet, efficient and easy to use!
By 'Yash Soto ', Reviewed on 2021-03-01 16:20:03
The product is very good and works as expected. This dehumidifier can definitely take away the moisture in the air in the basement. Once it reaches the humidity level I selected, it will shut down and continue to work when the humidity changes. It is compact, quiet and easy to set up. If you need a dehumidifier, it is definitely worth it.
I highly recommend this product!
By 'Felicity Hogan ', Reviewed on 2021-02-22 11:09:17
We recently purchased it and it has been working well so far. It is very easy to install, especially with a drain hose. We are worried that it may be too small for our basement, but it has reduced the humidity in our basement, and we can feel the obvious difference.
Amazing dehumidifier!
By 'Lena Acosta ', Reviewed on 2021-02-07 11:18:17
This is really an amazing dehumidifier, it works very well, it is very quiet, the device is not too bulky and easy to use. We use it in the basement to control the humidity there and connect the supplied hose for automatic drainage. It has been in existence for several months and can maintain humidity at around 50% without problems. I highly recommend this product.
Satisfied with our purchase
By 'Charlize Morton ', Reviewed on 2021-02-01 13:43:32
This is an effective dehumidifier, suitable for our basements above 2000 square feet. We have been using it for more than two months, essentially plugging it in and forgetting it. It has reduced the humidity to a comfortable level, which greatly reduces the musty smell. The noise level is so small that we don't pay much attention. If needed, I will buy it again.
The product is very effective
By 'Elsie Wagner ', Reviewed on 2021-01-25 14:26:32
The product really works. I use it in a basement where the air is very humid and full of moisture. My office is in the basement and I stay there most of the time. When I realized that the office was humid, I decided to buy a dehumidifier. I read a lot of reviews and finally ordered the product. I am very happy. Since using this product, the air is obviously less humid and the environment is more comfortable. The dehumidifier does not take up much space and is very easy to install and use. It does not make a lot of noise, I just hope to buy it sooner. I would recommend it to anyone.


Questions & Answers
Answered by Alorair
Hi Chloe! Thank you for your interest in our product. For the Auto humidistat feature, the sentinel HD90 is equipped with an advanced humidity sensor that can notice changes in humidity levels in the bypass air design reducing short cycling and saving energy.

1 Answer

Answered by Alorair
The unit lasts 7 years or more. You will just need to clean/replace the filter and clean the coil.
How to drain the water?

Courteney on 2021-03-29 16:17:13

1 Answer

Answered by Alorair
For effective drainage, lead the drain pipe into the pit. Check to make sure it is flowing downwards, and there should be no troughs, sinks, or loops. You can use PVC pipes to draw the water out. The machine drains under gravity, so make sure to completely defrost it when storing it.
Answered by Alorair
Hello, the Sentinel HD90 dehumidifier comes with a detailed user manual. Thanks for your question!

1 Answer

Answered by Alorair
Hello, all available installation modes of the Sentinel HD90 dehumidifier are easy and do not require technicians. Thanks for your question!

1 Answer

Answered by Alorair
Hello, the Sentinel HD90 dehumidifier consumes 5.56A per day. Thanks for your question!

1 Answer

Answered by Alorair
Hello, the Sentinel HD90 dehumidifier can be deployed in hotels/motels, shops, and bars, basements, computer rooms, museums, restaurants, laboratories, offices, storage areas, etc. Thanks for your question!
Answered by Alorair
Hello, the filter equipped with this dehumidifier is cleanable. Depending on the place of use, the interval between cleaning the filter twice may be different. It is recommended that you check the filter once a month to determine if it needs to be cleaned or replaced. Thanks for your question!

1 Answer

Answered by Alorair
Hello, the Sentinel HD90 dehumidifier is equipped with a rare earth alloy tube evaporator. Thanks for your question!

1 Answer

Answered by Alorair
Hello, the Sentinel HD90 dehumidifier is equipped with a rotary compressor. Thanks for your question!