Model
Waykar CTH30D
Rank #17 means 16 of the 519 dehumidifier models we track cost less to run each year; the 4th efficiency percentile means it uses less energy for its size than 4% of those models.
What does the Waykar CTH30D cost to run per year?
Almost nothing we track in this class costs less to run than the Waykar CTH30D: about $22 a year, rank #17 of 519. Adjusted for size, it is only more efficient than 4% of dehumidifier models we track, among the lowest size-adjusted results we track for the class. The IEF figure of 1.7 on this model captures integrated energy factor, the main efficiency lever ENERGY STAR tracks for this class.
Immediately around it on the leaderboard, the Waykar CTH30A at $22/yr runs a little cheaper and the Waykar PD160B at $23/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 Waykar CTH30D's $22/yr adds up to roughly $176 in electricity alone, before purchase price or repairs.
Also sold as: Black+Decker BDT08TW.
By the numbers
The Waykar CTH30D 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 $22/yr, here is what the Waykar CTH30D adds up to before purchase price, water, or repairs enter the math.
Left running for a decade at today's US average rate, the Waykar CTH30D costs about $220. That is roughly $420 less than the class median, which would run closer to $640 over the same ten years.
How the Waykar CTH30D compares
The dehumidifier class we track runs from $19 to $521 a year. At $22/yr, it runs about $42 a year cheaper than the class median of $64, and it is about $3 a year more than the cheapest dehumidifier to run at $19.
What drives its running cost
At 9.2 pints/day, the Waykar CTH30D is a small dehumidifier for its class, which spans 1.91 to 172.13 pints/day with a median of 32.46 pints/day, at the small end of the class, capacity itself is doing a lot of the work to keep that figure down, separate from how efficient the unit actually is. Beyond size, its IEF of 1.7, 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 Waykar CTH30D cheap to run?
Yes, relatively. At $22 a year it ranks #17 of 519 dehumidifier models we track, in the cheaper part of its class to run.
How much does the Waykar CTH30D cost per month?
Roughly $1.81/mo, spreading the $22/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 117 kWh from ENERGY STAR and multiply it by the US average residential electricity rate of $0.1856/kWh, giving about $22 a year. It is an electricity-only estimate and does not include purchase price, water, or installation.
How efficient is the Waykar CTH30D for its size?
4th 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 |
|---|---|---|
| 20 | Waykar CTH30A9.2 pints/day | $22 |
| 19 | Kesnos CTH30E9.2 pints/day | $22 |
| 18 | Kesnos CTH30B9.2 pints/day | $22 |
| 17 | Black+Decker BDT08TW9.2 pints/day | $22 |
| 16 | Humilabs OL12-D023F9 pints/day | $20 |
Source
ES_1148178_CTH30D_05292025164002_1847153View certified dehumidifier listingsENERGY STAR data as of July 2026Waykar and CTH30D 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.