AlorAir Sentinel WHD 100, Ducted Whole-House Dehumidifier
A ducted whole-house dehumidifier rated 90 PPD at AHAM (70 PPD at DOE conditions) for homes up to 2,300 sq ft, with a fresh air damper and MERV-10 filtration.
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QUICK VERDICT
Whole-house dehumidifiers are sold by the square foot. The Sentinel WHD 100 is the ducted rung AlorAir builds for a home up to 2,300 sq ft: 70 pints per day at DOE conditions, a fresh air damper, and MERV-10 filtration on the airstream.
Price: $1,399 · Verified: 2026-09-17
Whole-house dehumidifiers are sold by the square foot. The Sentinel WHD 100 is the ducted rung AlorAir builds for a home up to 2,300 sq ft: 70 pints per day at DOE conditions, a fresh air damper, and MERV-10 filtration on the airstream.
Humidity is the upstream half of indoor air quality: damp basements and crawl spaces feed mold and dust mites, and that air migrates into living space. A ducted whole-house unit treats the problem at the envelope rather than one room at a time, and the Sentinel WHD 100 is the first rung of AlorAir's ducted line at The Dry Air, sized for a home up to 2,300 square feet. The line steps up through the WHD 120, WHD 150 and WHD 200, so the real buying question is which rung matches your square footage.
Size it from the right number. AlorAir rates the WHD 100 at 90 pints per day under the AHAM standard (80 F, 60 percent relative humidity) and 70 PPD under DOE whole-house conditions (73 F, 60 percent RH). Both are the brand's figures, and the DOE number is the one to size from because it sits closer to how a conditioned house actually runs.
What $1,399 buys over a standalone basement unit is the air path. The WHD 100 ties into supply and return duct runs from a mechanical room, filters the airstream at MERV-10, a real dust-and-pollen grade where most crawl-space units carry MERV-1 screens that protect the coil rather than your air, and adds what AlorAir describes as an upgraded fresh air function controlled through a fresh air damper. Stated efficiency is 2.6 L/kWh at AHAM (2.2 at DOE) with R32 refrigerant and auto defrost, the maker-stated sound level is 55 dBA, it runs on 115V at 5.9 amps, AlorAir states cETL certification, and The Dry Air backs it with a 6-year limited warranty, full coverage for the first 2 years.
Where it gives ground: this is a ducted machine, so it needs a mechanical space and realistically an installer if duct runs do not already exist. The product page lists no duct collar size or operating temperature range, though The Dry Air sells a 10-inch intake duct it lists as compatible, at $79, so confirm the duct plan with The Dry Air before the install. Replacement MERV-10 filters run $65.90 for a 3-pack, and AlorAir recommends a new filter every six months (both verified 2026-09-17).
The verdict is by house, not by spec sheet: a ducted or duct-ready home up to 2,300 square feet gets the WHD 100 and keeps $600 against the WHD 120; a home up to 3,000 square feet steps up to the WHD 120; and an unducted basement buys the standalone Sentinel HDi100 and skips the install.
A ducted or duct-ready home up to 2,300 sq ft that wants whole-house humidity control with MERV-10 filtration on the airstream and a fresh air damper, sized from the 70 PPD DOE rating rather than the 90 PPD AHAM headline.
Your home is larger than 2,300 sq ft (the WHD 120 covers up to 3,000 sq ft), there is no ductwork and no appetite for an install project (the standalone Sentinel HDi100 at $1,050 covers 2,900 sq ft), or you only need to dry a single room or a small crawl space.
Specifications
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Where this fits
AlorAir Sentinel WHD 100 Whole-House Dehumidifier cross-shops across several editorial surfaces on this site: the full brand catalog and the in-depth guides for its category.
AlorAir Sentinel WHD 100 Whole-House Dehumidifier - buyer FAQ
Sentinel WHD 100 vs WHD 120, which one?
Square footage decides it. AlorAir rates the WHD 100 for homes up to 2,300 square feet at 70 pints per day under DOE conditions, priced at $1,399, and the WHD 120 for up to 3,000 square feet at 85 pints per day under DOE conditions, priced at $1,999. Both are ducted and both filter the airstream at MERV-10. Buy the rung that covers your home; the larger unit in a smaller house adds $600 without a stated gain.
What do the 90 PPD and 70 PPD ratings mean?
Both are the stated removal rates under different test conditions. 90 pints per day is the AHAM rating at 80 F and 60 percent relative humidity; 70 PPD is the DOE whole-house rating at a cooler 73 F and the same humidity. A conditioned home runs closer to the DOE condition, so size from 70 PPD, not the headline.
What does the fresh air damper do?
AlorAir describes the WHD 100 as having an upgraded fresh air function controlled through a fresh air damper, the control on the outside-air side of the ducted system. The product page does not publish how much outside air the damper admits, so set it up with your installer rather than designing around an assumed figure.
How loud is the WHD 100?
AlorAir publishes 55 dBA for the WHD 100, against 62 dBA for the larger WHD 120. Both are manufacturer figures rather than independent measurements. It is a ducted machine intended for a mechanical room, basement or crawl space, ducted away from living areas, so the unit itself does not sit in the rooms it dries.
What does installing the WHD 100 involve?
It ties into supply and return duct runs from a mechanical space, so a home without existing duct runs will realistically want an installer. The product page lists no duct collar size or operating temperature range, though The Dry Air sells a 10-inch intake duct it lists as compatible, at $79, so confirm the duct plan with The Dry Air before the job. Buy through thedryair.com: pricing differs from the manufacturer site, and $1,399 is the thedryair.com listing we verified on September 17, 2026.
AlorAir Sentinel WHD 100, Ducted Whole-House Dehumidifier
$1,399 · Verified 2026-09-17
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