Quick Answer: The AlorAir Sentinel HDi65 is the best all-around AlorAir dehumidifier — a compact 55-pint-AHAM unit with a built-in pump built for a crawl space or basement, around $700-755. Add Wi-Fi with the HDi65S (about $605-755, depending on retailer sale pricing), save with the pump-free HD55 (about $520-550), or step up to the LGR-equipped Storm LGR Extreme (about $650) if you’re drying out an active flood rather than managing ongoing humidity. Here’s how AlorAir’s lineup actually breaks down.
AlorAir has quietly become the go-to brand for crawl-space encapsulation contractors and water-damage restoration crews — its name shows up throughout our site in guides for basements, crawl spaces, attics, gun safes, and flood cleanup, but it’s never had its own roundup until now. The catch is that AlorAir sells two genuinely different product families under one name, and picking the wrong one means paying restoration-grade money for a job that a $550 residential unit would have handled, or the reverse. Below is what each model is actually built for.
AlorAir dehumidifiers at a glance
| Model | Best for | AHAM / Saturation | Pump | Price |
|---|---|---|---|---|
| AlorAir Sentinel HDi65 | Best overall | 55 / 120 PPD | Built-in (19.6 ft) | about $700-755 |
| AlorAir Sentinel HDi65S | Best with Wi-Fi | 55 / 120 PPD | Built-in (19.6 ft) | about $605-755 |
| AlorAir Sentinel HD55 | Best budget | 53 / 113 PPD | Gravity drain | about $520-550 |
| AlorAir Storm LGR Extreme | Best for active floods | 85 / 180 PPD | Built-in (14.7 ft) | about $650 |
| AlorAir Storm LGR 850 | Best compact commercial | 85 / 180 PPD | Built-in (19.6 ft) | about $500 |
Prices reflect current retailer listings and fluctuate — check the live price on Amazon before ordering.
AlorAir dehumidifiers by the numbers
- 120 PPD saturation vs. 55 pints AHAM: two ratings for the same HDi65, measured under different conditions (90°F/90% RH vs. 80°F/60% RH). Always size on the AHAM figure or you’ll buy roughly half the real-world capacity you expected.
- 19.6 ft: the vertical lift of the HDi65 and HDi65S’s built-in condensate pump — enough to reach daylight from most basements and crawl spaces without a floor drain.
- 36°F: the low-temperature limit the Sentinel line’s auto-defrost keeps it running at, versus roughly 41°F where a standard consumer compressor unit ices over and quits.
- ~5x: roughly how much less the Storm LGR Extreme costs than a comparable legacy restoration brand like Dri-Eaz, which is why AlorAir has become the default choice in the encapsulation and restoration trades.
- 24-48 hours: how quickly mold can begin growing on damp building materials, per the EPA — the reason the Storm line prioritizes fast LGR drying over the Sentinel line’s slower, steady-state approach.
- 6 years: AlorAir’s standard limited warranty on current Sentinel models, longer than the 1-2 years typical of consumer room dehumidifiers, though still short of Aprilaire’s 5-year commercial-grade coverage on the E-Series.
1. AlorAir Sentinel HDi65 — Best Overall
AlorAir Sentinel HDi65
- Compact commercial body fits low-clearance crawl spaces and tight basement corners a standard portable can't.
- Built-in condensate pump with 19.6-ft lift drains itself out a window or up to a sink, no floor drain required.
- Auto-defrost keeps it pulling moisture down to about 36°F, well below where a standard room unit ices up.
- Energy Star certified, cETL listed, 6-year limited warranty.
The HDi65 is the default right answer across most of AlorAir’s use cases on this site — it’s small enough to slide into a crawl space, powerful enough for a damp basement, and self-draining enough to leave alone for months. Get your dehumidifier running in two days — try Amazon Prime free for 30 days.
For the full breakdown of why this is our top crawl-space pick specifically, see our best crawl space dehumidifier guide.
2. AlorAir Sentinel HDi65S — Best with Wi-Fi
AlorAir Sentinel HDi65S
- Identical hardware to the HDi65 — same 55-pint AHAM rating, built-in pump, and 36°F auto-defrost.
- Adds Wi-Fi and app control, so you get a phone alert for a full tank, a fault, or a humidity swing instead of finding out on your next visit.
- Best suited to a space you don't check often — a rental property crawl space, a vacation home, or a server closet.
An app alert doesn’t empty the tank for you — that’s still the built-in pump’s job — but it does mean a stuck defrost cycle or a clogged drain line gets caught in hours instead of weeks. See our best WiFi dehumidifier roundup for how it stacks up against other connected models.
3. AlorAir Sentinel HD55 — Best Budget
AlorAir Sentinel HD55
- Same compact footprint and 36°F auto-defrost as the HDi65, at a lower price.
- Drains by gravity through a hose instead of a built-in pump — you need a spot the unit can drain downhill from.
- 6-year limited warranty, same as the pump-equipped models.
If your crawl space or basement has a sump or a low point to drain toward, the HD55 gets you nearly identical drying power for less — just confirm your drain route before you buy, since retrofitting a pump later isn’t an option on this model.
4. AlorAir Storm LGR Extreme — Best for Active Floods
AlorAir Storm LGR Extreme
- Low Grain Refrigerant (LGR) design keeps pulling moisture from air that's already fairly dry, long after the Sentinel line would stall out.
- Covers up to 2,300 sq ft, with a built-in pump that lifts water 14.7 ft through a 19.6-ft hose.
- 5-year warranty and under-58-dB operation, quiet for a machine moving this much air.
This is the AlorAir to buy after a burst pipe or flood, not for everyday humidity control — see our best commercial dehumidifier guide for how it compares against the rest of the Storm line and other restoration brands.
5. AlorAir Storm LGR 850 — Best Compact Commercial
AlorAir Storm LGR 850
- Same 85-pint AHAM capacity as the LGR Extreme, in a lighter body built to haul between jobs.
- Works down to 36°F, useful for a cold, unfinished basement or crawl space in shoulder season.
- Trades a little refinement and Wi-Fi for a lower price than the Extreme.
A mobile contractor or a homeowner tackling a one-time restoration job gets essentially the same drying power as the Extreme for less here.
How to choose an AlorAir dehumidifier
- Sentinel for ongoing humidity control, Storm for an active flood. The Sentinel line is built to run quietly for months in a crawl space or basement; the Storm line’s LGR technology is overkill (and louder, heavier gear) for a space that isn’t actively wet.
- Pump vs. gravity drain. If you can’t route a hose downhill to a drain, you need a pump-equipped model — the HDi65, HDi65S, LGR Extreme, or LGR 850. Only the HD55 requires gravity.
- Add Wi-Fi if you won’t check the space often. The HDi65S’s app alerts matter most in a rental, vacation home, or any space you visit less than monthly.
- Size on AHAM, not saturation. Compare the smaller pint number across brands and models — the bigger “saturation” figure describes flood conditions, not your actual room.
- Know AlorAir sells almost exclusively online. Unlike Frigidaire or GE, there’s little AlorAir presence at Home Depot or Lowe’s — budget for Amazon or direct-from-manufacturer purchase and registration for warranty service.
The bottom line
The AlorAir Sentinel HDi65 is the right default for most crawl spaces and basements — compact, self-draining, and built to run for years down to 36°F. Add the HDi65S for remote alerts in a space you don’t check often, or save with the pump-free HD55 if you can gravity-drain. If the job is an active flood rather than ongoing moisture control, the LGR-equipped Storm LGR Extreme or the lighter Storm LGR 850 are the AlorAir models built for that instead. For how the HDi65 stacks up against a name-brand alternative, see our AlorAir vs. Aprilaire comparison, and for the full commercial-grade lineup, check our best commercial dehumidifier guide.