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AlorAir Sentinel HDi100 Whole-House Dehumidifier vs Argendon Shield 35P

Specs, prices, editor verdict, and who should buy which - compared side-by-side.

By Ryan · Founder
Updated Aug 14, 2026
Quick verdict

AlorAir Sentinel HDi100 Whole-House Dehumidifier (premium, $1,050) vs Argendon Shield 35P (mid, $373–$396) - different tools for different jobs (see the per-product details below).

Compared on 7 shared specs · same category (environment).

AlorAir Sentinel HDi100 whole-house and crawl-space dehumidifier
AlorAir

Sentinel HDi100 Whole-House Dehumidifier

A pumped, cETL-certified 100-pint dehumidifier that holds a 2,900 sq ft basement or crawl space at target humidity and then disappears into the background.

PRICE
$1,050
View at AlorAir
Argendon Shield 35P crawl space dehumidifier
Argendon

Shield 35P

Indoor humidity is the upstream lever for indoor air quality, and damp crawl spaces feed mold and dust mites into the air you breathe. The Argendon Shield 35P is the compact, pump-equipped unit that keeps a small crawl space or basement dry.

PRICE
$373–$396
View at Argendon
The verdict

These are close picks. Both score in the same range. The right call depends on buyer profile - read the per-buyer recommendations below.

Side-by-side specs

SpecAlorAir Sentinel HDi100 Whole-House DehumidifierArgendon Shield 35P
price$1,050$373–$396
typeWhole-house / crawl-space dehumidifier (with condensate pump)Crawl space / basement dehumidifier
capacity100 PPD at AHAM, up to 220 pints/day at saturation70 pints/day saturation (35 pints/day AHAM)
coverageUp to 2,900 sq ftUp to 1,000 sq ft
certificationcETL listedETL safety listed
drainageIntegrated condensate pump, continuous drainage6.5 ft gravity hose + built-in pump (19.6 ft lift)
dimensions23.8 x 14.7 x 17.9 in; 88 lb; 60 dBA; 33.8 to 104 F15.2 x 11.2 x 11.4 in, ~38 lbs
warranty6-year limited (first 2 years full coverage)5-year limited

AlorAir Sentinel HDi100 Whole-House Dehumidifier also publishes: efficiency

Argendon Shield 35P also publishes: defrost, refrigerant

Who should buy which

Pick the AlorAir Sentinel HDi100 Whole-House Dehumidifier if

Homeowners protecting a large basement, crawl space, or whole-house envelope from moisture, mold, and wood rot who want set-and-forget operation with a built-in pump.

Skip if

You only need to dry a single room or small crawl space (the lower-cost HDi65 or Helios units are a better fit), or you want true HEPA or carbon air purification rather than moisture control.

Pick the Argendon Shield 35P if

Homeowners with a small damp crawl space or basement (up to ~1,000 sq ft) who want set-and-forget continuous drainage via a built-in pump at a compact size and lower price.

Skip if

Your space is larger or wetter (step up to the AlorAir Helios MP55), or you only need to filter room-air particulates (an air purifier addresses that instead).

Go deeper

FULL REVIEW
Read the AlorAir Sentinel HDi100 Whole-House Dehumidifier review →
FULL REVIEW
Read the Argendon Shield 35P review →

Frequently asked

Which is better, the AlorAir Sentinel HDi100 Whole-House Dehumidifier or the Argendon Shield 35P?

They are closely matched on our scoring, so the right pick comes down to your priorities. The verdict and spec table above compare them on price, features, and who each one suits.

How much do they cost?

AlorAir Sentinel HDi100 Whole-House Dehumidifier: $1,050. Argendon Shield 35P: $373 to $396. Prices are verified against the manufacturer; check the live links for current pricing.

Who should buy which one?

AlorAir Sentinel HDi100 Whole-House Dehumidifier: Homeowners protecting a large basement, crawl space, or whole-house envelope from moisture, mold, and wood rot who want set-and-forget operation with a built-in pump. Argendon Shield 35P: Homeowners with a small damp crawl space or basement (up to ~1,000 sq ft) who want set-and-forget continuous drainage via a built-in pump at a compact size and lower price.

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