Model
Moiswell Defender ME-7
Rank #173 means 172 of the 519 dehumidifier models we track cost less to run each year; the 32nd efficiency percentile means it uses less energy for its size than 32% of those models.
What does the Moiswell Defender ME-7 cost to run per year?
At roughly $53 a year to run, ranking #173 of 519, the Moiswell Defender ME-7 costs less than the typical dehumidifier model we track. Size-adjusted, this model trails most of its class on efficiency, ahead of just 32% of dehumidifier models we track. The IEF figure of 1.84 on this model captures integrated energy factor, the main efficiency lever ENERGY STAR tracks for this class.
Immediately around it on the leaderboard, the Moiswell Defender M7R at $53/yr runs a little cheaper and the Moiswell Defender ME-7S at $53/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 Moiswell Defender ME-7's $53/yr adds up to roughly $424 in electricity alone, before purchase price or repairs.
Also sold as: Airecoler Atlas T70.
By the numbers
The Moiswell Defender ME-7 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 $53/yr, here is what the Moiswell Defender ME-7 adds up to before purchase price, water, or repairs enter the math.
Left running for a decade at today's US average rate, the Moiswell Defender ME-7 costs about $530. That is roughly $110 less than the class median, which would run closer to $640 over the same ten years.
How the Moiswell Defender ME-7 compares
The dehumidifier class we track runs from $19 to $521 a year. At $53/yr, it runs about $11 a year cheaper than the class median of $64, and it is about $34 a year more than the cheapest dehumidifier to run at $19.
What drives its running cost
At 24.43 pints/day, the Moiswell Defender ME-7 is a small dehumidifier for its class, which spans 1.91 to 172.13 pints/day with a median of 32.46 pints/day, at the small end of the class, capacity itself is doing a lot of the work to keep that figure down, separate from how efficient the unit actually is. The IEF of 1.84 on this model, below 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 Moiswell Defender ME-7 cheap to run?
Yes. Its $53/yr running cost puts it at rank #173 of 519, below what most dehumidifier models we track cost to run.
How much does the Moiswell Defender ME-7 cost per month?
About $4.41 a month, which is the $53 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: 285 kWh from ENERGY STAR times the US average of $0.1856/kWh comes to about $53 a year. It covers electricity only, not the purchase price, water, or installation.
How efficient is the Moiswell Defender ME-7 for its size?
32nd percentile once size is factored in, a fairly typical result for the class.
Cheaper to run in the same class
Source
ES_1152863_Defender ME-7_02172026101510_5656247View certified dehumidifier listingsENERGY STAR data as of July 2026Moiswell and Defender ME-7 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.