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Deal.ai › AlorAir Solutions › Dehumidifiers
AlorAir Solutions
ALORAIR Basement/Crawl Space Dehumidifiers Removal 120 PPD (Saturation), 55 Pint Commercial Dehumidifier | Sentinel HD55S (White)
AlorAir Solutions

ALORAIR Basement/Crawl Space Dehumidifiers Removal 120 PPD (Saturation), 55 Pint Commercial Dehumidifier | Sentinel HD55S (White)

3.9(15 ratings)

Best price now

$499.47at WalmartChecked 4 h ago

15% under what the other stores charge

Compared across 8 stores. Prices are checked against each store and labelled with when.

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Price facts

  • Lowest price today: $499.47 at Walmart (checked Nov 15, 2026).
  • Checked at 8 stores.

Our take on the ALORAIR Basement/Crawl Space Dehumidifiers Removal 120 PPD (Saturation), 55 Pint Commercial Dehumidifier | Sentinel HD55S (White)

The AlorAir Sentinel HD55S is a compact commercial-grade dehumidifier built for basements and crawl spaces. It pulls up to 55 pints per day at standard AHAM conditions (120 pints at saturation) and is rated for spaces up to about 13,000 sq ft. It runs quietly under 50 dBA, keeps working down to 36°F with auto-defrost, and restarts at its previous settings after a power outage. Against typical residential units it offers tougher low-temperature operation and remote monitoring, but it is heavier at 44 lb and drains by gravity only, so it needs a floor drain or hose route.

Best forBasement and crawl space moisture controlCold spaces down to 36°FWhole-floor or small commercial dryingOwners who want remote monitoring and auto-restart
Pros
  • High extraction for its size: 55 pints/day AHAM, 120 pints at saturation
  • Auto-defrost keeps it running in cold air down to 36°F
  • Quiet for a basement unit at under 50 dBA
  • Restarts at previous settings after a power outage
  • Remote sensing and monitoring
  • Washable filter included
Cons
  • Heavy at 44 lb and bulky to move
  • Gravity drain only; no built-in pump to push water uphill
  • Water tank is small for continuous high-moisture use
  • Commercial styling and controls are plain

ALORAIR Basement/Crawl Space Dehumidifiers Removal 120 PPD (Saturation), 55 Pint Commercial Dehumidifier | Sentinel HD55S (White) prices at every store

  • WalmartNew

    In stockSold by ALORAIR-US

    $499.47Free shippingChecked 4 h ago
    Visit Walmart
  • AlorairCrawlspaceNew

    In stock

    $505.95Checked 9 h ago
    Visit AlorairCrawlspace
  • eBayNew

    In stockSold by c2_toovem_us

    $551.36Free shippingChecked 4 h ago
    Visit eBay
  • Division 7 SupplyNew

    In stock

    $588.00Free shippingChecked 4 h ago
    Visit Division 7 Supply
  • JB ToolsNew

    In stock

    $648.66Free shippingChecked 4 h ago
    Visit JB Tools
  • AmazonNew

    Availability unknown

    As an Amazon Associate, Deal.ai earns from qualifying purchases.

    $509.71Free shippingChecked 4 h ago
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  • Airpurifierblog.comNew

    Availability unknown

    $638.00Checked 4 h ago
    Visit Airpurifierblog.com
  • ThedryairNew

    Availability unknown

    $648.66Checked 4 h ago
    Visit Thedryair

Store links may earn us a commission. Some prices via Klarna.

ALORAIR Basement/Crawl Space Dehumidifiers Removal 120 PPD (Saturation), 55 Pint Commercial Dehumidifier | Sentinel HD55S (White) price history

Lowest price we've seen: $499.47 on Nov 15 at Walmart. Tracked across 7 stores since Nov 15.

What reviewers say

  • 3.9 / 515 ratings

Owners of the Sentinel line generally report strong moisture removal in damp basements and crawl spaces and praise the cold-weather auto-defrost. Common complaints center on weight, the gravity-only drain, and the need to set up a hose or drain line.

What people mention
  • Moisture removalPraisedOwners say it dries damp basements and crawl spaces quickly.
  • Cold operationPraisedAuto-defrost lets it keep running in air down to 36°F.
  • NoisePraisedUnder 50 dBA is quiet for a unit this size.
  • WeightCriticisedAt 44 lb it is hard to carry and reposition.
  • DrainingCriticisedGravity drain only, so a hose or floor drain is required.
  • Power outagePraisedIt resumes its previous settings once power returns.

About the ALORAIR Basement/Crawl Space Dehumidifiers Removal 120 PPD (Saturation), 55 Pint Commercial Dehumidifier | Sentinel HD55S (White)

The AlorAir Sentinel HD55S is a compact commercial dehumidifier for basements and crawl spaces. It removes up to 120 pints of moisture per day at saturation, or 55 pints per day by the AHAM rating. It runs at under 50 dBA.

An automatic defrost system uses built-in sensors to watch the surrounding temperature. When it detects low temperatures, the compressor stops while the fan keeps running so frost can thaw. Normal operation then resumes. This lets the unit work in cool spaces down to 36°F.

After a power outage, the unit restarts with its previous settings once power returns. It drains by gravity and supports remote monitoring and control.

Capacity
120 pints per day at saturation; 55 pints per day (AHAM)
Efficiency
2.4 L/kWh
Air flow
130 CFM (230 CMH)
Noise level
Under 50 dBA
Draining
Gravity draining
Temperature range
33.8-104°F
Humidity range
36%-90%
Filter
MERV-1 filter, included
Refrigerant
R32
Features
Auto defrost, automatic restart, automatic shutdown, water tank, remote monitoring and control
Dimensions
19.2 x 12.2 x 13.3 in (L x W x H)
Weight
41.7 lb (18.91 kg)
Color

Specifications

Filter Included
YesSource
Color
WhiteSource
Features
Passive, Water Tank, Automatic Restart, Automatic ShutdownSource
Functions
DehumidifierSource
Operating Area (sq. ft) (sqft)

Questions and answers

Is the HD55S enough for a large basement?
It is rated for areas up to about 13,000 sq ft and removes 55 pints per day at AHAM conditions. For a typical home basement that is ample; very wet or open spaces may need more than one unit.
Does it work in a cold crawl space?
Yes. Auto-defrost lets it operate down to 36°F, stopping the compressor while the fan thaws frost. Below that temperature performance drops.
Does it have a built-in pump?
No. It drains by gravity, so you need a floor drain or a downward-sloping hose route. A separate condensate pump is needed to lift water uphill.
What is the difference between 55 pints and 120 pints?
55 pints per day is the AHAM rating at standard room conditions. 120 pints is the saturation rating at higher heat and humidity, which is how commercial units are often compared.
Does it restart after a power outage?
Yes. It resumes operating at its previous settings once power is restored.
What comes in the box?
The unit and a washable filter. A drain hose is not included, so plan for one if you are not using a floor drain.
Where is the ALORAIR Basement/Crawl Space Dehumidifiers Removal 120 PPD (Saturation), 55 Pint Commercial Dehumidifier | Sentinel HD55S (White) cheapest?
At Walmart, for $499.47, 15% under what the other stores charge, as of our latest check.
What do buyers say about the ALORAIR Basement/Crawl Space Dehumidifiers Removal 120 PPD (Saturation), 55 Pint Commercial Dehumidifier | Sentinel HD55S (White)?
Rated 3.9 out of 5 from 15 ratings.
Where can I buy the ALORAIR Basement/Crawl Space Dehumidifiers Removal 120 PPD (Saturation), 55 Pint Commercial Dehumidifier | Sentinel HD55S (White)?
8 stores we checked sell it, including JB Tools, Walmart, Amazon, Thedryair, eBay.

Stores we've priced the ALORAIR Basement/Crawl Space Dehumidifiers Removal 120 PPD (Saturation), 55 Pint Commercial Dehumidifier | Sentinel HD55S (White) at

  • Walmart deals and prices

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