Model
Mionjo V3
Rank #64 means 63 of the 519 dehumidifier models we track cost less to run each year; the 16th efficiency percentile means it uses less energy for its size than 16% of those models.
What does the Mionjo V3 cost to run per year?
At $36 a year to run, the Mionjo V3 is among the cheapest dehumidifier models we track, ranking #64 of 519. Its 16th size-adjusted efficiency percentile is well below the class median, worth weighing against the raw cost figure above. At a IEF of 1.77, 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 Aircyan GF20C-20RW at $36/yr runs a little cheaper and the Doghly FDD20-5272V1R5-E at $37/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 Mionjo V3's $36/yr adds up to roughly $288 in electricity alone, before purchase price or repairs.
By the numbers
The Mionjo V3 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 $36/yr, here is what the Mionjo V3 adds up to before purchase price, water, or repairs enter the math.
Left running for a decade at today's US average rate, the Mionjo V3 costs about $360. That is roughly $280 less than the class median, which would run closer to $640 over the same ten years.
How the Mionjo V3 compares
The dehumidifier class we track runs from $19 to $521 a year. At $36/yr, it runs about $28 a year cheaper than the class median of $64, and it is about $17 a year more than the cheapest dehumidifier to run at $19.
What drives its running cost
At 16.13 pints/day, the Mionjo V3 is a small dehumidifier for its class, which spans 1.91 to 172.13 pints/day with a median of 32.46 pints/day, less capacity to service is usually the first reason a running-cost figure lands on the low side, before efficiency even enters the picture. Beyond size, its IEF of 1.77, below 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). 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 Mionjo V3 cheap to run?
Yes, relatively. At $36 a year it ranks #64 of 519 dehumidifier models we track, in the cheaper part of its class to run.
How much does the Mionjo V3 cost per month?
Roughly $3.03/mo, spreading the $36/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 196 kWh from ENERGY STAR and multiply it by the US average residential electricity rate of $0.1856/kWh, giving about $36 a year. It is an electricity-only estimate and does not include purchase price, water, or installation.
How efficient is the Mionjo V3 for its size?
16th 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
| Rank | Model | Cost/yr |
|---|---|---|
| 63 | Aircyan GF20C-20RW16.3 pints/day | $36 |
| 62 | Keepglad FDD20-5270ZV1R5-E16 pints/day | $36 |
| 61 | Ogacfo YOLFHM079WH15.84 pints/day | $36 |
| 60 | Andte PD50K15.5 pints/day | $36 |
| 59 | Arecovas AR-DF00116 pints/day | $36 |
Source
ES_1152816_V3_05122026160000_0000001View certified dehumidifier listingsENERGY STAR data as of July 2026Mionjo and V3 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.