AlorAir Helios MP55 vs AlorAir Sentinel WHD 120 Whole-House Dehumidifier
Specs, prices, editor verdict, and who should buy which, compared side by side.
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AlorAir Helios MP55 (mid, $699.66) vs AlorAir Sentinel WHD 120 Whole-House Dehumidifier (premium, $1,999). Different tools for different jobs (see the per-product details below).
Compared on 5 shared specs · same category (environment).
We have not scored these two head to head, so this page does not name a winner. The AlorAir Helios MP55 starts at $699.66 and the AlorAir Sentinel WHD 120 Whole-House Dehumidifier at $1,999. The per-buyer recommendations below say who each one suits.
Side-by-side specs
| Spec | AlorAir Helios MP55 | AlorAir Sentinel WHD 120 Whole-House Dehumidifier |
|---|---|---|
| price | $699.66 | $1,999 |
| type | Crawl space / basement dehumidifier | Ducted whole-house / basement / crawl-space dehumidifier |
| capacity | 120 pints/day (PPD) | 104 PPD at AHAM (80 F, 60% RH); 85 PPD at DOE whole-house (73 F, 60% RH) |
| coverage | Up to 1,500 sq ft | Up to 3,000 sq ft |
| certification | ENERGY STAR Most Efficient, ETL | cETL (brand-stated) |
| warranty | 5 years | 6-year limited warranty; specific coverage for whole-house dehumidifiers is subject to The Dry Air's warranty terms (per The Dry Air) |
AlorAir Helios MP55 also publishes: drainage, shipping
AlorAir Sentinel WHD 120 Whole-House Dehumidifier also publishes: airflow, filter, efficiency, sound, power, dimensions
Who should buy which
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.
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.
Homeowners conditioning a whole-house, basement, or sealed crawl-space envelope up to 3,000 sq ft who want ducted, set-and-forget humidity control with MERV-10 filtration on the airstream, installed in a mechanical space away from living areas.
Your space has no ductwork and you do not want an install project (the standalone Sentinel HDi100 at $1,050 covers 2,900 sq ft), your crawl space is small (Helios MP55, $699.66), or you expect HEPA-grade air purification, which this is not.
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Frequently asked
Which is better, the AlorAir Helios MP55 or the AlorAir Sentinel WHD 120 Whole-House Dehumidifier?
We have not scored these two head to head, so this page does not name a winner. The AlorAir Helios MP55 starts at $699.66 and the AlorAir Sentinel WHD 120 Whole-House Dehumidifier at $1,999. The per-buyer recommendations below say who each one suits.
How much do they cost?
AlorAir Helios MP55: $699.66. AlorAir Sentinel WHD 120 Whole-House Dehumidifier: $1,999. 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. AlorAir Sentinel WHD 120 Whole-House Dehumidifier: Homeowners conditioning a whole-house, basement, or sealed crawl-space envelope up to 3,000 sq ft who want ducted, set-and-forget humidity control with MERV-10 filtration on the airstream, installed in a mechanical space away from living areas.
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