AlorAir Helios MP55 vs AlorAir Sentinel WHD 120 Whole-House Dehumidifier
Specs, prices, editor verdict, and who should buy which - compared side-by-side.
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).
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
| 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, first 2 years full coverage (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?
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 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.