Model
Alorair Helios D35
Rank #109 means 108 of the 519 dehumidifier models we track cost less to run each year; the 37th efficiency percentile means it uses less energy for its size than 37% of those models.
What does the Alorair Helios D35 cost to run per year?
Do the math and the Alorair Helios D35's $51/yr puts it at rank #109 of 519, on the cheaper side of the class. Adjusted for size, it is only more efficient than 37% of dehumidifier models we track, so part of its running cost comes from its capacity rather than efficiency alone. Its IEF of 1.95 reflects integrated energy factor, one of the class's core efficiency levers.
Immediately around it on the leaderboard, the Dreo Home DR-HDH003S at $50/yr runs a little cheaper and the Arecovas AR-DF002 at $51/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 Helios D35's $51/yr adds up to roughly $408 in electricity alone, before purchase price or repairs.
By the numbers
The Alorair Helios D35 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 $51/yr, here is what the Alorair Helios D35 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 Helios D35 costs about $510. That is roughly $130 less than the class median, which would run closer to $640 over the same ten years.
How the Alorair Helios D35 compares
The dehumidifier class we track runs from $19 to $521 a year. At $51/yr, it runs about $13 a year cheaper than the class median of $64, and it is about $32 a year more than the cheapest dehumidifier to run at $19.
What drives its running cost
At 24 pints/day, the Alorair Helios D35 is a small dehumidifier for its class, which spans 1.91 to 172.13 pints/day with a median of 32.46 pints/day, and smaller dehumidifier models generally cost less to run for the same job, all else being equal. Its IEF of 1.95, below the class median of 2.01, reflects integrated energy factor: a higher figure means it wrings more useful work out of every kilowatt-hour, so it is the efficiency lever to weigh against raw size.
- 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 Alorair Helios D35 cheap to run?
Yes, relatively. At $51 a year it ranks #109 of 519 dehumidifier models we track, in the cheaper part of its class to run.
How much does the Alorair Helios D35 cost per month?
Roughly $4.24/mo, spreading the $51/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 274 kWh from ENERGY STAR and multiply it by the US average residential electricity rate of $0.1856/kWh, giving about $51 a year. It is an electricity-only estimate and does not include purchase price, water, or installation.
How efficient is the Alorair Helios D35 for its size?
37th percentile once size is factored in, a fairly typical result for the class.
Cheaper to run in the same class
Source
ES_1145148_Helios D35_01272026184000_4566766View certified dehumidifier listingsENERGY STAR data as of July 2026Alorair and Helios D35 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.