Model
Alorair Sentinel HD55S
Rank #298 means 297 of the 519 dehumidifier models we track cost less to run each year; the 71st efficiency percentile means it uses less energy for its size than 71% of those models.
What does the Alorair Sentinel HD55S cost to run per year?
At about $70 a year, the Alorair Sentinel HD55S lands in the middle third of dehumidifier models we track on running cost, rank #298 of 519. Capacity-normalized, it ranks ahead of 71% of dehumidifier models we track, a reasonably strong result for the class. The IEF figure of 2.08 on this model captures integrated energy factor, the main efficiency lever ENERGY STAR tracks for this class.
Immediately around it on the leaderboard, the Abestorm Guardian SN55S at $70/yr runs a little cheaper and the Baseaire AirWerx 55S at $70/yr runs a little more, a sense of how tightly models are packed at this point in the ranking. A dehumidifier typically stays in service for somewhere around 8 years; over that span, the Alorair Sentinel HD55S's $70/yr adds up to roughly $560 in electricity alone, before purchase price or repairs.
Also sold as: Abestorm Guardian SN55S.
By the numbers
The Alorair Sentinel HD55S normalized against its whole class, so each figure means something.
What it costs you over time
Running cost is an every-year number, so it compounds. At $70/yr, here is what the Alorair Sentinel HD55S adds up to before purchase price, water, or repairs enter the math.
Left running for a decade at today's US average rate, the Alorair Sentinel HD55S costs about $700. That is roughly $60 more than the class median, which would run closer to $640 over the same ten years.
How the Alorair Sentinel HD55S compares
The dehumidifier class we track runs from $19 to $521 a year. At $70/yr, it runs about $6 a year above the class median of $64, and it is about $51 a year more than the cheapest dehumidifier to run at $19.
What drives its running cost
At 36.33 pints/day, the Alorair Sentinel HD55S is a mid-size dehumidifier for its class, which spans 1.91 to 172.13 pints/day with a median of 32.46 pints/day, right in the middle of the capacity range, so capacity is roughly a wash compared with the rest of the class. The IEF of 2.08 on this model, above the class median of 2.01, measures integrated energy factor; it is the number to compare directly against another model's IEF if capacity is similar.
- Integrated Energy Factor (IEF). IEF measures liters of water removed per kilowatt-hour; a higher IEF means less energy per pint of moisture removed for a given capacity.
- Water removal capacity (pints/day). A dehumidifier rated to remove more pints per day is built for a larger space or a more humid room, and generally draws more power to do it.
- Humidistat accuracy. A unit with a more precise humidistat cycles the compressor off once the target humidity is reached, rather than running continuously.
Common questions
Is the Alorair Sentinel HD55S cheap to run?
Roughly, yes. Its $70/yr figure is close to the class median, ranking #298 of 519, neither a bargain nor a splurge on running cost.
How much does the Alorair Sentinel HD55S cost per month?
About $5.86 a month, which is the $70 annual estimate spread across twelve months at the US average rate of $0.1856/kWh. Your own bill scales with your local electricity rate and how heavily you use it.
How is this running-cost figure calculated?
The formula is annual kWh times price per kWh: 379 kWh from ENERGY STAR times the US average of $0.1856/kWh comes to about $70 a year. It covers electricity only, not the purchase price, water, or installation.
How efficient is the Alorair Sentinel HD55S for its size?
71st percentile once size is factored in, a fairly typical result for the class.
Cheaper to run in the same class
Source
ES_1145148_Sentinel HD55S_01062025110739_4779931View certified dehumidifier listingsENERGY STAR data as of July 2026Alorair and Sentinel HD55S are used here for identification only and are not endorsements. Figures are computed by WattWise Labs from public ENERGY STAR data, not measured in our own lab.