Model
Moiswell Defender M145
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 M145 cost to run per year?
Not many dehumidifier models we track cost more to run than the Moiswell Defender M145: about $98 a year, rank #480 of 519. Normalized for capacity, it beats 46% of dehumidifier models we track, an average result for the class. 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 HP150 at $98/yr runs a little cheaper and the Moiswell Defender M70 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 M145'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 M145 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 M145 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 M145 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 M145 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 M145 is a large dehumidifier for its class, which spans 1.91 to 172.13 pints/day with a median of 32.46 pints/day, size is usually the single biggest lever behind a running-cost figure, and at this end of the range there is more capacity to service, which tends to push the number up. Its IEF of 2.02, above 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 Moiswell Defender M145 cheap to run?
Not especially. At $98 a year it ranks #480 of 519 dehumidifier models we track, in the pricier part of its class to run, though its size and features may still justify that for your needs.
How much does the Moiswell Defender M145 cost per month?
Roughly $8.2/mo, spreading the $98/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 530 kWh from ENERGY STAR and multiply it by the US average residential electricity rate of $0.1856/kWh, giving about $98 a year. It is an electricity-only estimate and does not include purchase price, water, or installation.
How efficient is the Moiswell Defender M145 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 M145_01142026134617_3923369View certified dehumidifier listingsENERGY STAR data as of July 2026Moiswell and Defender M145 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.