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Head-to-head buyer guide

AlorAir Helios MP55 vs Argendon Shield 35P

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

By Ryan · Founder
Updated Sep 27, 2026

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Quick verdict

AlorAir Helios MP55 (mid, $699.66) vs Argendon Shield 35P (mid, $372.89). Different tools for different jobs (see the per-product details below).

Compared on 6 shared specs · same category (environment).

AlorAir Helios MP55 crawl space dehumidifier
AlorAir

Helios MP55

Indoor air quality is a longevity input most people ignore, and humidity is the lever underneath it. The AlorAir Helios MP55 is the crawl-space and basement dehumidifier that keeps a home dry enough to stop mold and dust mites before they reach the air you breathe.

PRICE
$699.66
View at AlorAir →
Argendon Shield 35P crawl space dehumidifier
Argendon

Shield 35P

The Argendon Shield 35P is a compact crawl space and basement dehumidifier: rated at 70 pints per day at saturation (35 pints per day on the AHAM standard) for spaces up to about 1,000 sq ft, with a built-in condensate pump so it drains continuously without a tank to empty.

PRICE
$372.89
View at Argendon →
The verdict

We have not scored these two head to head, so this page does not name a winner. The Argendon Shield 35P starts at $372.89 and the AlorAir Helios MP55 at $699.66. The per-buyer recommendations below say who each one suits.

Side-by-side specs

SpecAlorAir Helios MP55Argendon Shield 35P
price$699.66$372.89
typeCrawl space / basement dehumidifierCrawl space / basement dehumidifier
capacity120 pints/day (PPD)70 pints/day saturation (35 pints/day AHAM)
coverageUp to 1,500 sq ftUp to 1,000 sq ft
drainageBuilt-in pump + drain hose (continuous)6.5 ft gravity hose + built-in pump (19.6 ft lift)
certificationENERGY STAR Most Efficient, ETLETL safety listed
warranty5 years5-year limited

AlorAir Helios MP55 also publishes: shipping

Argendon Shield 35P also publishes: defrost, refrigerant, dimensions

Who should buy which

Pick the AlorAir Helios MP55 if

Homeowners in humid climates, or anyone with a damp basement or crawl space, who wants to control humidity and mold at the source as part of a clean-air home. The built-in pump suits set-and-forget continuous drainage.

Skip if

You only need to clean particulates from room air (get an air purifier instead), your space is already dry, or you want a small portable bedroom dehumidifier rather than a whole-crawl-space unit.

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 Helios MP55 review →
FULL REVIEW
Read the Argendon Shield 35P review →

Frequently asked

Which is better, the AlorAir Helios MP55 or the Argendon Shield 35P?

We have not scored these two head to head, so this page does not name a winner. The Argendon Shield 35P starts at $372.89 and the AlorAir Helios MP55 at $699.66. The per-buyer recommendations below say who each one suits.

How much do they cost?

AlorAir Helios MP55: $699.66. Argendon Shield 35P: $372.89. Prices are verified against the manufacturer; check the live links for current pricing.

Who should buy which one?

AlorAir Helios MP55: Homeowners in humid climates, or anyone with a damp basement or crawl space, who wants to control humidity and mold at the source as part of a clean-air home. The built-in pump suits set-and-forget continuous drainage. 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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