ALORAIR Sentinel HD55S Crawlspace Dehumidifier 120 Pint
- 120 pints per day at saturation, 55 PPD at AHAM
- Up to 1,300 sq. ft.
- Auto defrost and low-temperature operation
- Continuous drainage through built-in outlet
- Metal housing, MERV-1 filter
- Energy Star, cETL
- 6-year limited warranty, first 2 years full
Last refreshed Sep 8, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A rugged crawl space and basement dehumidifier for damp, cool areas that need continuous drainage. It is far more machine than a bedroom needs.
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ASIN: B01LWA8J37Model: Sentinel HD55SCategory: Dehumidifiers
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Overview
Draining straight out through its built in outlet, the AlorAir Sentinel pulls moisture from crawl spaces and basements without a tank to empty. A defrost cycle pauses the compressor when frost forms in cold spaces.
Continuous drainage, cold weather operation and a metal case make it fit for crawl spaces and storage areas. It is sized for large, damp spaces, not a single room upstairs.
Who it's for
Made for crawl spaces, basements, warehouses and storage areas. Apartment dwellers should choose a compact unit.
Pros and cons
- High moisture removal
- Auto defrost in cold spaces
- Energy Star certified
- Oversized for small rooms
- Remote monitoring optional extra
- Drain hose only in title
Performance notes
Moisture removal depends on temperature and humidity, so the saturation figure far exceeds the standard test figure. Auto defrost stops the coil icing in cool air while the fan melts frost. A filter protects internal parts from crawl space dust.
Specifications
| Brand | Alorair |
|---|---|
| Model | Sentinel HD55S |
| Capacity & performance | |
| Dehumidification Capacity | 120 pints per day at saturation, 55 PPD at AHAM |
| Construction & materials | |
| Material | Metal housing |
| Warranty & support | |
| Warranty Description | 6-year limited, first 2 years full coverage |
| Other details | |
| Floor Area | Up to 1,300 sq. ft. |
| Operation Mode | Auto defrost, low-temperature operation |
| Container Type | Continuous drainage, built-in drain outlet |
| Filter | MERV-1 |
| Specification met | Energy Star, cETL |
Frequently asked questions
Will the AlorAir Sentinel HD55S work in a cold crawl space?
Yes. It has low-temperature operation and auto-defrost that pauses the compressor while the fan melts ice.
Do I need to empty a tank on the HD55S?
No. It drains automatically through the built-in drain outlet.
How much moisture does the HD55S remove?
Up to 120 pints per day at saturation, or 55 PPD at AHAM.
Can I monitor the HD55S remotely?
It is compatible with optional remote monitoring.