Model
Wellsle PD21MA
Rank #42 means 41 of the 519 dehumidifier models we track cost less to run each year; the 42nd efficiency percentile means it uses less energy for its size than 42% of those models.
What does the Wellsle PD21MA cost to run per year?
The Wellsle PD21MA costs about $34 a year to run and sits near the top of the cheapest-to-run leaderboard, rank #42 of 519. Once capacity is factored in, its efficiency percentile of 42 is fairly typical for the class, neither a standout nor a laggard. Its IEF of 1.9 reflects integrated energy factor, one of the class's core efficiency levers.
Immediately around it on the leaderboard, the Waykar PD160B-PRO-G at $27/yr runs a little cheaper and the Humilabs OL20-D068Q at $34/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 Wellsle PD21MA's $34/yr adds up to roughly $272 in electricity alone, before purchase price or repairs.
Also sold as: Concetta AS-CSJ72XK-4D5WT-OL.
By the numbers
The Wellsle PD21MA 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 $34/yr, here is what the Wellsle PD21MA adds up to before purchase price, water, or repairs enter the math.
Left running for a decade at today's US average rate, the Wellsle PD21MA costs about $340. That is roughly $300 less than the class median, which would run closer to $640 over the same ten years.
How the Wellsle PD21MA compares
The dehumidifier class we track runs from $19 to $521 a year. At $34/yr, it runs about $30 a year cheaper than the class median of $64, and it is about $15 a year more than the cheapest dehumidifier to run at $19.
What drives its running cost
At 16 pints/day, the Wellsle PD21MA 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. The IEF of 1.9 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). 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 Wellsle PD21MA cheap to run?
Yes, relatively. At $34 a year it ranks #42 of 519 dehumidifier models we track, in the cheaper part of its class to run.
How much does the Wellsle PD21MA cost per month?
Roughly $2.8/mo, spreading the $34/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 181 kWh from ENERGY STAR and multiply it by the US average residential electricity rate of $0.1856/kWh, giving about $34 a year. It is an electricity-only estimate and does not include purchase price, water, or installation.
How efficient is the Wellsle PD21MA for its size?
42nd 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_1151082_PD21MA_06132025133341_1422803View certified dehumidifier listingsENERGY STAR data as of July 2026Wellsle and PD21MA 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.