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AlorAir® Sentinel HDi90 Duct-able Version Basement/Crawl Space Dehumidifiers 198PPD (Saturation) 90 Pints (AHAM), Condensate Pump, Automatic Defrosting, Epoxy Coating, Remote Control (Optional)

Model : Sentinel HDi90

4.9 Average

$1,047.00 List Price: $1,550.00

Sentinel HDi90 dehumidifier is designed specifically for crawl spaces and basements. Low noise level, great COP,2.69 L/kwh, and huge capacity 90PPD at AHAM condition.
Draining Mode: Condensate Pump

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Crawlspaces or basements tend to have increased humidity levels. This is mainly because these spaces are either partially or completely underground. Once the moist air comes into these spaces, the moisture condenses on the walls or floor. This causes increased dampness.

Increased dampness creates the perfect environment for increased dust mites and the growth of mold and mildew. According to the American lung association, these are known allergens that can cause respiratory problems and asthma.

Key features

  • Quiet operation.
  • Energy-efficient - Super COP Energy Star Listed 2.69L/Kwh.
  • Compatible with Remote Control.  (Notice: sold separately).
  • Ducting options.
  • Automatic Defrosting System.
  • Corrosion protection.
  • Overheating protection.
  • Engineered for low-temperature operation.
  • Rare earth alloy Tube Evaporator


The sentinel HDi90 is horizontally configured, built with an advanced airflow design that makes this unit the best choice for dehumidification in tight spaces with airflow issues.

The sentinel HDi90 is uniquely built to be deployed in:

  • Residential spaces.
  • Restoration jobs.
  • Shop.
  • Storage facilities.
  • Garages.
  • Laboratories.
  • Offices
  • Crawlspaces.
  • Basements.

Capable of maintaining humidity levels controlled in any space below 2,600 sq. Ft.

All-purpose use

Capacity. - The sentinel HDi90 is able to remove:

  • 90 pint of water per day(115V(80ºF-60%)

 This is impressive especially because of its small size and low energy consumption.

Performance. – The sentinel HDi90 combines a number of features to effectively lower the humidity levels. These features include:

  • Continuous Pump drainage - sentinel HDi90 is equipped with a condensate pump that is able to pump the collected water out of the unit via a pipe. This water can be pump at a distance of over 5 meters.
  • Durably built - The sentinel HDi90 has a corrosion protection layer that protects the unit from the corrosive environment in which it will be deployed.
  • Air filtration - The sentinel HDi90 has a washable filter that traps mold spores and other air impurities to improve the indoor air quality.
  • Silent operation - The sentinel HDi90 produces a low noise level while operational hence will not affect your comfort levels.
  • Defrosting system - The sentinel HDi90 has an auto defrosting system that increases the efficiency of the dehumidifier, especially in low temperatures.
  • Easy installation and set-up - The sentinel HDi90 allow a variety of installation option, all of which are easy and don’t require you to hire a technician. This is a plug and plays appliance with no technical knowledge needed.
  • Duct options – A duct can be added to the sentinel HDi90 to provide focused dehumidification or allow you to dehumidify space where the dehumidifier can fit or you can use the duct to connect the sentinel HDi90 to the existing HVAC system for whole-house dehumidification.
  • Remote control - The sentinel HDi90 allows you to remotely adjust the dehumidifier setting remotely. This makes it convenient to operate a dehumidifier in a tight space. (Sold separately)

Warranty – The sentinel HDi90 has an extended 5 years warranty. At Alorair we have designed and built the sentinel HDi90 dehumidifier to exceed the customer quality expectations. All sentinel HDi90 units are thoroughly tested and proven to be fully functional.

Support – All Alorair customers get to enjoy efficient user support via email, phone, or live chat. We are dedicated to helping all our customers with any challenges they may face while operating the sentinel HDi90.

The sentinel HDi90 has lots of unique features that all combine to efficiently and effectively control the humidity levels! invest in the sentinel HDi90 today!

Power 115V/60HZ
Current 5.56A(115v/60Hz)
COP 2.69L/Kwh(115v/60Hz)
Size For Up to 2,600 sq.ft.
Filter Clean Air Filter,HEPA,MERV-8
Air flow 210 CFM,350 CMH
Sound Pressure Level <58DBA
Refrigerant R410A
Feet Adjustable Feet
Draining Condensate Pump
Defrosting Control System Automatic Defrosting
Functioning Temperature Range 33~104℉
Functioning Humidity Range 35~90%
Capacity115V(80ºF-60%) 90 Pints
Weight 85.9 Ibs
Dim(LxWxH) 23.2x15.2x17.7in
Loading quantity 20”:180Sets/40”:412Sets/40”HQ :515Sets

Ratings Summary

98% Recommend this product of 40 responses

40 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: 40 Reviews
Works excellent!
By 'Leo Harris ', Reviewed on 2021-09-18 09:33:48
I installed this unit in my 2500 sqft crawl space that is plastic lined. I was having a lot of humidity, around 76%-78% under the house. I set this unit up, and the moisture got down to 50% in about five days. It works perfectly, pumps the water out as it should, and I couldn't be happier with my investment. Don't hesitate to buy it if you have humidity issues in ample space, and it works excellent!
Good product
By 'Ryan Baker ', Reviewed on 2021-07-08 09:35:08
It is a cost-saving machine. First of all, it easy to install, so you don't need to pay extra money to hire a technician. In addition, its small size and low energy consumption product.
Useful Product
By 'Jairo White ', Reviewed on 2021-07-01 16:26:43
It was a disaster that never thinks about before, the pipe in our basement was leaking. It caused the whole basement space to become damp and smelly. Luckily, we got this! The product is tiny compare to others, but it's compact, and we love the function very much. The sentinel HDi90 has a washable filter that traps mold spores and other air impurities to improve indoor air quality. What's more, this product can remotely adjust the dehumidifier and produces low noise levels while operational.
Works amazingly!
By 'Madeline Hall ', Reviewed on 2021-05-21 10:30:19
Bought this to put into my basement and noticed a huge difference after the first day! The built-in condensate pump setup saves you from having to treat the water yourself. The dehumidifier will switch from high to low after about an hour or more once the humidity levels have dropped. Overall, this is a nice product that works amazingly and I recommend this to everyone.
easy and useful, surprsing
By 'Aleisha Connelly ', Reviewed on 2021-04-15 11:01:10
We purchased the model after we realized there was a moisture problem in the basement bedroom. Since we started using it, we've noticed a big difference in the room, there's no moldy smell anymore, it smells fresher and feels drier. It runs very quietly, so you hardly notice it. If you are experiencing humidity problems in a large room or area of the house, it is highly recommended to purchase this product.
This one that I have purchased is amazing
By 'Shola Gould ', Reviewed on 2021-03-31 09:32:21
Let me first start off by saying I am very picky when it comes to dehumidifiers. This one that I have purchased is amazing. It has a slight hum to it which is very soothing. I love that it comes with a drainage hose and I love the fact that it's pretty lightweight and easy to move. I highly recommend it. We put it in the center of our house because our home for some reason collects lots of moisture. It is very easy to use and I highly recommend it.
Excellent humidity solution
By 'Zunaira Cuevas ', Reviewed on 2021-03-15 16:08:15
The water pipe in our basement leaked. After the rain, the musty smell was really frustrating, so we bought this dehumidifier. good results! Our basement is a medium-sized cement basement, this product can really solve the problem. There are no more odors and moisture in the air! Definitely recommend to anyone with water problems.
Great product
By 'Veer Bartlett ', Reviewed on 2021-03-08 17:45:13
This dehumidifier is a ready-to-use device in my garage. On the first day of use, I noticed that the humidity in the garage had dropped drastically. The dehumidifier is easy to set up, and you can choose a hose attachment to drain the water out of the window. I am very satisfied with this product. If we need another one, I will buy it again.
Keep our basement dry
By 'Kaira Campos ', Reviewed on 2021-03-01 16:39:03
It works right out of the box. The dehumidifier is easy to install and very quiet. I am well connected to my sump pump through the attached hose. It has been operating in the basement for several weeks and has completely eliminated the musty smell. If you are looking for a basement dehumidifier, then this is your best choice.
Exactly what we want!
By 'Velma Moreno ', Reviewed on 2021-02-22 11:47:46
I purchased this dehumidifier to replace one of our large open finished basements. We have been using it since the purchase and are very satisfied with it. This unit is smaller than our old unit, but much quieter does the job perfectly and can keep the basement dry. If you need to replace the dehumidifier, you deserve this unit.


Questions & Answers
What are the accessories in the box?

Bertram on 2021-09-09 10:15:16

1 Answer

Answered by Alorair
Dimensions: 23.2x15.2x17.7in
Answered by Alorair
Hi Cody!Our answer is Yes. This product has a feature of the defrosting system. Because the sentinel HDi90 has an Automatic defrosting system that increases the efficiency of the dehumidifier, especially in low temperatures.
Answered by Alorair
This OPTIONAL REMOTE CONTROL is a new highlight of our product. As the name suggests, this professional dehumidifier can provide remote sensing and monitoring functions, so it can also achieve sound insulation and space-saving role. The dehumidifier needs to work with a controller, but the remote controller needs to be purchased separately, if you are interested, buy it now.
Can this unit be controlled by a smartphone?

Jean-Luc on 2021-04-21 15:28:25

1 Answer

Answered by Alorair
No, but it has a wired remote control feature which is purchased separately.
How does this dehumidifier work?

Phoenix on 2021-03-31 10:47:48

1 Answer

Answered by Alorair
The dehumidifier uses its internal humidity regulator to monitor the adjusted space. When the relative humidity exceeds the selected set point, the dehumidifier is started. The air is drawn through the evaporator coil, which has a lower dew point temperature than the air. This means that water will condense out of the air. The air is then reheated through the condenser coil and distributed back into the room.

1 Answer

Answered by Alorair
Hello, the Sentinel HDi90 dehumidifier is a plug-and-play device, you don't need to master any technical knowledge to use it. Thanks for your question!

1 Answer

Answered by Alorair
Hello, the current consumed by the Sentinel HDi90 dehumidifier is 5.56A. Thanks for your question!

1 Answer

Answered by Alorair
Hello, the Sentinel HDi90 dehumidifier is equipped with an environmentally friendly R410A refrigerant. Thanks for your question!

1 Answer

Answered by Alorair
Hello, the Sentinel HDi90 dehumidifier is equipped with a rotary compressor. Thanks for your question!
What is the evaporator type of this dehumidifier?

Isadora on 2021-02-08 16:07:04

1 Answer

Answered by Alorair
Hello, the Sentinel HDi90 dehumidifier is equipped with a rare earth alloy tube evaporator. Thanks for your question!