Model
Moiswell Defender MP145
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 MP145 cost to run per year?
Not many dehumidifier models we track cost more to run than the Moiswell Defender MP145: about $98 a year, rank #480 of 519. Adjusted for size, it is more efficient than 46% of dehumidifier models we track, a middling result. Its IEF of 2.02 reflects integrated energy factor, one of the class's core efficiency levers.
Immediately around it on the leaderboard, the Moiswell Defender M70 at $98/yr runs a little cheaper and the Moiswell Defender MP70 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 MP145'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 MP145 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 MP145 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 MP145 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 MP145 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 MP145 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. The IEF of 2.02 on this model, above 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). 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 MP145 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 MP145 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 MP145 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 MP145_01142026134537_8747250View certified dehumidifier listingsENERGY STAR data as of July 2026Moiswell and Defender MP145 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.