Model
Moiswell Defender M7R
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 M7R cost to run per year?
The Moiswell Defender M7R costs about $53 a year to run, which beats most of the 519 dehumidifier models we track; it ranks #173. Size-adjusted, this model trails most of its class on efficiency, ahead of just 32% of dehumidifier models we track. At a IEF of 1.84, its integrated energy factor is the single figure that best explains how it earns its running-cost number.
Immediately around it on the leaderboard, the Arecovas AR-DF006 at $53/yr runs a little cheaper and the Moiswell Defender ME-7 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 M7R'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 M7R 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 M7R 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 M7R 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 M7R 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 M7R 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. 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 M7R 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 M7R 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 M7R 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 M7R_02172026101643_4647098View certified dehumidifier listingsENERGY STAR data as of July 2026Moiswell and Defender M7R 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.