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Returnable until Jan 31, 2027 Learn more
Returnable until Jan 31, 2027 Learn more
This item's return window has been extended for the holiday season: Returnable until Jan 31, 2027
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
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Availability:
In Stock.
Arrives
Tuesday, Nov 24
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At a glance
- Condition
- New
- Color
- Black
- Model
- Sentinel HDi90
- Capacity
- 198 pints
- Dimensions
- 23.2"D x 15.2"W x 17.7"H
- Weight
- 70.5 lb
- Floor Area
- 2600 sq ft
- In the box
- Sentinel HDi90
Features 5
- 198 PPD Dehumidifier: With a large water removal capacity of up to 198 Pints per day at saturation, 90 PPD per day at AHAM, In a space as large as 2,600 square feet, this heavy-duty dehumidifier can fit virtually every crawl space and basement need. Compact and lightweight, also equipped with quality carrier handles. Fit for crawl spaces, basements, warehouses, offices, factories, shops, apartments, storage areas, restaurants, bars, and museums
- Heavy Duty Condensate Pump: When removing large amounts of moisture, the condensate pump keeps the dehumidifier running smoothly and efficiently by continuously pushing collected water out of the area. Optional Remote Control This professional dehumidifier is designed with the remote monitoring function, making this unit ideal for places where remote sense and control are required. The Whole Home dehumidifiers can be ducted by attaching return ducts, supply ducts, or both
- Built For Versatility: Engineered for Versatility: Designed with the modern user in mind, this professional-grade dehumidifier is powerful, efficient, featuring an appealing design. C-ETL certification make it an excellent choice for crawl spaces, basements, and commercial use
- Easy Operation: For your satisfaction, all special features make it the best for the whole house and crawl space or basement applications, optional remote control system, microchannel condenser technology, low-temperature operation, cETL. This whole house dehumidifier features automatic restart after power outages, continuous drainage for effortless humidity control
- 6-Year Limited Warranty & ETL Listed: This AlorAir crawl space dehumidifier is ETL listed for safety, backed by 6-year limited warranty - first 2 years full coverage with professional customer support ready to help whenever you need it
Description
Are You Looking for The Most Professional Crawl Space/Basement Dehumidifier That Is Standard And Durable? You are at the right place! The AlorAir dehumidifiers help reduce excess moisture, protect your home. This dehumidifier is factory-charged with R32 (GWP 675) as an integral part of its fully sealed system — non-removable, maintenance-free, and not sold separately. Sentinel HDi90-duct is much smaller and more compact than the conventional basement size dehumidifiers on the market. Measuring at only 23.2" (D) x 15.2" (W) x 17.7" (H), it allows for more flexibility with transportation, placement, and storage. The maximum moisture extraction, of up to 198 pints per day (90 PPD AHAM), at the lowest running cost. Ideal for residential work and suitable for households, crawl space, basements, warehouses, offices, industrial institutions, etc. Sentinel HDi90 Duct Inlet Duct 12 inch MERV-8 Filter 4 Pack Sentinel WHD100 Sentinel HDi90 Sentinel HDi100 Sentinel HDi120
Specs 26
| Brand | ALORAIR |
|---|---|
| Floor Area | 2600 sq ft |
| Color | Black |
| Special Feature | Automatic Defrost, Quiet Operation |
| Capacity | 198 pints |
| Product Dimensions | 23.2"D x 15.2"W x 17.7"H |
| Recommended Uses For Product | Commercial |
| Item Weight | 70.5 pounds |
| Material | Metal, Plastic, Activated Carbon, Hepa Filters |
| Other Special Features of the Product | Automatic Defrost, Quiet Operation |
| Operation Mode | Continuous |
| Air Flow Capacity | 210 cfm |
| Upper Temperature Rating | 104 °F |
| Dehumidification Capacity | 90 pints per day |
| Voltage | 115 V AC |
| Item Dimensions D x W x H | 23.2"D x 15.2"W x 17.7"H |
| Brand Name | ALORAIR |
| Model Name | Sentinel HDi90 |
| Model Number | Sentinel HDi90 |
| Manufacturer | ALORAIR |
| UPC | 747045157404 |
| Number of Items | 1 |
| Number of Packs | 1 |
| Item Highlight | Heavy-duty, Auto Defrost, High Capacity, 2,600 Sq. Ft., with Drain Hose, for Basement, Commercial, 6-Year Limited Warranty |
| Unit Count | 1 Count |
| Part Number | Sentinel HDi90 |
No specs match.
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Tuesday, Nov 24
Yes, absolutely! This item's return window has been extended for the holiday season: Returnable until Jan 31, 2027.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Initial testing looks great
Color: White
After about an hour of run time I came to check and a steady drip of water is coming out of the hose. One thing I looked for was a unit that was already setup for a hose. This unit comes ready to connect the hose for gravity draining. I live in a temperate rainforest, rains 9 months a year. My property is at the bottom of a hill and needs to stay drier than it can on it's own. We read about these units for a long time before buying this one. We looked for the following items before buying this unit. Noise, this is quiet, sounds about like a summer box fan. You can hear it but it's not an unpleasant amount of sound. Size, this is a good size unit that would fit in just about any crawlspace. Packs a lot of punch for it's small size. It is not light weight so if you plan to mount this up to your joists make sure you buy adequate brackets. Humidity level settings seemed really important to us to try and ensure it didn't run all the time, however this unit also comes with a continuous run setting which we also liked because in our crawlspace it might need to be run continuously. The build quality seems good. Metal case feels like steel plates are all pinned together using nice rounded top screws. The handle on top seems adequate for occasional wear and tear, I could imagine that daily movement would eventually wear this handle out but it's very thick and comfortable. You can tell a lot of thought went into the machine to make the user experience more comfortable and easy. There are no duct connectors on this unit which do often come on these higher grade units. That was a concern for us but since we do plan to set this unit permanent in the crawl space to dry out the undersides of the house we felt it was a good fit for our needs. We also looked significantly at the units abilities. This unit is capable of drying out a smaller space or keeping a small issue at bay. Our issue is significant moisture not small, but the area itself is very small. We hope that the unit will meet our long terms needs. Based on initial testing run the unit in my climate will meet or exceed the manufacturer's claims. My home without dehumidifiers runs about 70% humidity. So anything would be better than that. Our little cheap little GE made for a 1200sq ft house can get the house to 35-45% humidity with less than half the capacity this unit has. As for value, anyone looking at these knows none of them are cheap. This one is a budget model cutting some frills for price point.
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Reviewed in the United States on December 10, 2024 by Ancient Technology
Powerful, Reliable Dehumidifier That Gets the Job Done
Color: White
Great dehumidifier! The ALORAIR Sentinel HS35 is solidly built and works very efficiently. It quickly removes moisture and keeps humidity under control, especially in problem areas like bathrooms or rooms with wood floors. It’s easy to use and doesn’t require much maintenance. A bit noisy, but that’s expected for its power. Overall, a reliable and heavy-duty unit—highly recommend.
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Reviewed in the United States on March 19, 2026 by Vicky M.
Excellent unit for the price
Color: White
This is a really good dehumidifier. It has reduced our humidity in our 1500 square foot basement from 60% in the summer (near the Atlanta area) to 50% and, at times, it even turns itself off because it has reached the humidity target, based on the setting. I have the exhaust blowing into the floor between the basement and the upstairs and that distributes the drier air throughout the basement because I, also, installed a couple of open A/C vents in the ceiling of the basement for circulation purposes. The lower humidity makes the basement more comfortable and we don't need to run the A/C at the previous lower temperature. Because the unit does reach the 50% setting I have selected, it turns off at times and that means it uses less energy. This unit replaced a portable dehumidifier which ran all the time; I don't know that it uses less power than the portable unit but, because it does turn off occasionally where the old unit did not, I assume it doesn't use any more power. This unit is rated for 1500 square feet so it is at its maximum area of operation and, though it is stated to be a crawl space dehumidifier, it is serving well as a whole basement dehumidifier. The MERV-1 filter is the lowest level of filtering but, since the area is already air-conditioned, I wasn't needing any air cleaning. The company's higher priced units do offer better filtering if you are looking for that ability in a dehumidifier.
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Reviewed in the United States on August 2, 2025 by John W.
Lifesaver!
Color: White
We just bought a house and wanted to get something for the crawlspace to limit the humidity. I used reviews to find what I would select and chose this. It was an easy setup using the instructions and it seemed very durable. I plugged it in and it is quiet and works well. It helps with the humidity level. The leakage drains out and the extra benefit is that it quiet and energy efficient.
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Reviewed in the United States on March 23, 2026 by Paul D'Agostin
Not 70ppd! It’s 35ppd!
Color: White
Performance: Not as advertised. In a 12 hour run test it inly removed half of the rated water. Hence the product rated 4stars. It removed 8 liters (a little less than 2 gallons) in 12 hours and used 3900w (power consumption rated at 325wh) that is almost 17 pints in half a day or 35 pints per day. Conditions of my test: RH=89%. Dew point= 59degrees F. Overall efficiency: 2 kw to remove ~one gallon, 2 kw to remove ~ 4 liters Noise: 3 stars 65db in 1 foot radius. 59 db in 6 feet radius. 45 to 50 db (barely noticeable) behind a wall or when the unit is in crawl space, and you’re measuring in the room. Quality: 5 stars Solid piece of equipment. Low profile, perfect for crawl space. Value for money: 4 stars. Even though the actual performance is half the advertised value, an actual 35 ppd is good enough for a crawl space of 1500sqft if it’s run 24/7 and there is proper air circulation in the crawl space so the humidity is evenly distributed/removed. Ease of use: 5 stars. it has only one knob! Perfect for crawl space where you only need dehumidification function. It’s a set it and forget it short of installation. Speed: I think the fan speed is at the appropriate level to avoid louder operation. Pro tip 1: Install the unit at an elevated level. Connect a small hose to the drain hole, and place a tray or a catch can underneath. Install a separate water pump from the tray to outside. Peo tip 2: Install the unit and the water pump on smart wifi plugs so you can control them in your phone and don’t have to crawl in for power on/off. Pro tip3: Install a smart wifi humidity & temperature sensor behind the unit where the air is feeding in to constantly see the humidity level and how it changes over time on your phone. Pro tip4: If you have security cameras such as Blink, install a wifi camera and point it at your unit/tray so you can see the whole setup on your phone. Pro tip5: (I still haven’t done this but will install it): install a water leak sensor near the unit and place the probe on the floor where a possible water leak may occur. OR place it to the max level of your catch can so that when the water level gets to point, you will get a notification, or you can program your Alexa to turn on your water pump, or turn off your dehumidifier. Of course this is optional but it adds one more level of robustness to your setup so the water removed from the air doesnt go back accidentally to the crawl space.
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Reviewed in the United States on October 21, 2023 by Amazon Customer
HS35
Color: White
Run good for 2 months then show E5 error code tried several times to get alorair to take care of problem but kept wanting information from machine that it didn’t display. Would not recommend this unit
Reviewed in the United States on May 28, 2026 by Eugene
Good dehumidifier for basement
Color: White
Have had the dehumidifier for over a month and it is working as desired. It have it set at 30 and it runs continuously in the basement which doesn’t get below 39. Very pleased with purchase
Reviewed in the United States on May 30, 2026 by Joe b
Works well,
Color: Black
Purchased this unit 5 months ago and wanted to write a review after I seen how it would preform. I have a 2500sqft crawl space fully encapsulated, and was not happy with the unit at first. It does not pull the amount of moisture out of the air as stated in the description, far from it. The first 2 months I had it set at 52% and only got 2 gallons of water in 24 hours and the unit never shut down, ran continuously. But now over time it is cycling on and off and I was able to set it at 50%. Unless the conditions are 100% humidity and it’s 85 degrees I don’t see how this unit can pull the moisture out of the air that it states it can. Updating my review after 2 1/2 years of use. It keeps my crawl space between 45 and 50 percent and cycles on and off as needed. Pump works well and I am pleased with this unit. I read in some reviews that it is noisy but I disagree, it is no louder than a box fan running on a medium speed, you hear the fan blowing the air. Don’t expect this to do miracles in the beginning but it is now working for me as I wanted.
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Reviewed in the United States on May 27, 2023 by Average Joe