Model
Abestorm Guardian SN55S
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 Abestorm Guardian SN55S cost to run per year?
Ranking #298 of 519, the Abestorm Guardian SN55S runs at roughly $70 a year, neither the cheapest nor the priciest in its class. Normalized for capacity, it beats 71% of dehumidifier models we track, a better-than-average efficiency result. Its IEF of 2.08 reflects integrated energy factor, one of the class's core efficiency levers.
Immediately around it on the leaderboard, the Gasbye DryPrime-35-BP at $70/yr runs a little cheaper and the Alorair Sentinel HD55S 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 Abestorm Guardian SN55S's $70/yr adds up to roughly $560 in electricity alone, before purchase price or repairs.
Also sold as: Alorair Sentinel HD55S, Baseaire AirWerx 55S.
By the numbers
The Abestorm Guardian SN55S 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 Abestorm Guardian SN55S adds up to before purchase price, water, or repairs enter the math.
Left running for a decade at today's US average rate, the Abestorm Guardian SN55S 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 Abestorm Guardian SN55S 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 Abestorm Guardian SN55S 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. Beyond size, its IEF of 2.08, above the class median of 2.01, is the class's own efficiency yardstick, integrated energy factor, and it is what separates two similarly sized models with different running costs.
- Integrated Energy Factor (IEF). Two dehumidifiers rated for the same pints per day can carry very different IEF figures, and IEF is what actually separates their running costs.
- Water removal capacity (pints/day). Pints-per-day rating scales with the space it is built for, and that rating is the first driver of how much power the compressor needs.
- Humidistat accuracy. How tightly a humidistat holds its target humidity determines how much of the day the compressor actually runs, on top of the unit's rated capacity and IEF.
Common questions
Is the Abestorm Guardian SN55S cheap to run?
It is about average. At $70 a year it ranks #298 of 519 dehumidifier models we track, close to the middle of its class on running cost.
How much does the Abestorm Guardian SN55S cost per month?
Roughly $5.86/mo, spreading the $70/yr estimate evenly across twelve months at $0.1856/kWh. Actual monthly bills swing with your rate and usage pattern.
How is this running-cost figure calculated?
We take the model's published annual energy use of 379 kWh from ENERGY STAR and multiply it by the US average residential electricity rate of $0.1856/kWh, giving about $70 a year. It is an electricity-only estimate and does not include purchase price, water, or installation.
How efficient is the Abestorm Guardian SN55S 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_Guardian SN55S_01062025110739_3463845View certified dehumidifier listingsENERGY STAR data as of July 2026Abestorm and Guardian SN55S 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.