Model
Moiswell Defender M70
Rank #480 means 479 of the 519 dehumidifier models we track cost less to run each year; the 46th efficiency percentile means it uses less energy for its size than 46% of those models.
What does the Moiswell Defender M70 cost to run per year?
Among the 519 dehumidifier models we track, the Moiswell Defender M70's $98/yr running cost ranks it #480, in the pricier fifth of the class. Capacity-normalized, it ranks ahead of 46% of dehumidifier models we track, right in the class's middle band. The IEF figure of 2.02 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 M145 at $98/yr runs a little cheaper and the Moiswell Defender MP145 at $98/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 M70's $98/yr adds up to roughly $784 in electricity alone, before purchase price or repairs.
Also sold as: Airzentti ACD155P-PG100.
By the numbers
The Moiswell Defender M70 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 $98/yr, here is what the Moiswell Defender M70 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 M70 costs about $980. That is roughly $340 more than the class median, which would run closer to $640 over the same ten years.
How the Moiswell Defender M70 compares
The dehumidifier class we track runs from $19 to $521 a year. At $98/yr, it runs about $34 a year above the class median of $64, and it is about $79 a year more than the cheapest dehumidifier to run at $19.
What drives its running cost
At 49.83 pints/day, the Moiswell Defender M70 is a large dehumidifier for its class, which spans 1.91 to 172.13 pints/day with a median of 32.46 pints/day, among dehumidifier models, bigger capacity is the most common reason a running-cost figure lands on the high side, all else being equal. Beyond size, its IEF of 2.02, 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). 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 M70 cheap to run?
Its $98/yr running cost, rank #480 of 519, is above what most dehumidifier models we track cost to run, so this is not one of the cheaper picks on electricity alone.
How much does the Moiswell Defender M70 cost per month?
About $8.2 a month, which is the $98 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: 530 kWh from ENERGY STAR times the US average of $0.1856/kWh comes to about $98 a year. It covers electricity only, not the purchase price, water, or installation.
How efficient is the Moiswell Defender M70 for its size?
46th percentile once size is factored in. That means its size-adjusted efficiency is not the main reason for the running-cost figure above; its capacity plays a large role too.
Cheaper to run in the same class
Source
ES_1152863_Defender M70_01142026134635_6602815View certified dehumidifier listingsENERGY STAR data as of July 2026Moiswell and Defender M70 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.