Model
Kesnos CTH30E
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 Kesnos CTH30E cost to run per year?
Do the math and the Kesnos CTH30E's $22/yr running cost puts it at rank #17 of 519, among the least expensive dehumidifier models we track to keep running. Its size-adjusted efficiency percentile of 4 means its running cost, whatever it is, owes almost nothing to efficiency and almost everything to capacity. Its IEF of 1.7 reflects integrated energy factor, one of the class's core efficiency levers.
Immediately around it on the leaderboard, the Kesnos CTH30B at $22/yr runs a little cheaper and the Waykar CTH30A at $22/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 Kesnos CTH30E'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 Kesnos CTH30E 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 Kesnos CTH30E adds up to before purchase price, water, or repairs enter the math.
Left running for a decade at today's US average rate, the Kesnos CTH30E 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 Kesnos CTH30E 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 Kesnos CTH30E 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 1.7, 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). IEF measures liters of water removed per kilowatt-hour; a higher IEF means less energy per pint of moisture removed for a given capacity.
- Water removal capacity (pints/day). A dehumidifier rated to remove more pints per day is built for a larger space or a more humid room, and generally draws more power to do it.
- Humidistat accuracy. A unit with a more precise humidistat cycles the compressor off once the target humidity is reached, rather than running continuously.
Common questions
Is the Kesnos CTH30E cheap to run?
Yes. Its $22/yr running cost puts it at rank #17 of 519, below what most dehumidifier models we track cost to run.
How much does the Kesnos CTH30E cost per month?
About $1.81 a month, which is the $22 annual estimate spread across twelve months at the US average rate of $0.1856/kWh. Your own bill scales with your local electricity rate and how heavily you use it.
How is this running-cost figure calculated?
The formula is annual kWh times price per kWh: 117 kWh from ENERGY STAR times the US average of $0.1856/kWh comes to about $22 a year. It covers electricity only, not the purchase price, water, or installation.
How efficient is the Kesnos CTH30E 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
Source
ES_1148178_CTH30E_05292025164002_5239053View certified dehumidifier listingsENERGY STAR data as of July 2026Kesnos and CTH30E 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.