Model
Miele TWB120 WP
Rank #13 means 12 of the 615 clothes dryer models we track cost less to run each year; the 98th efficiency percentile means it uses less energy for its size than 98% of those models.
What does the Miele TWB120 WP cost to run per year?
Out of the 615 clothes dryer models we track, the Miele TWB120 WP lands at rank #13 on cost, roughly $25 a year, a standout figure at the cheap end of the class. Its size-adjusted efficiency percentile of 98 means the low running cost is not just a function of size; almost nothing in the class beats it on efficiency once capacity is accounted for. At a CEF of 6.37, its combined energy factor is the single figure that best explains how it earns its running-cost number.
Immediately around it on the leaderboard, the Miele TWI180 WP at $25/yr runs a little cheaper and the Lg DLHC1455* at $25/yr runs a little more, a sense of how tightly models are packed at this point in the ranking. A clothes dryer typically stays in service for somewhere around 13 years; over that span, the Miele TWB120 WP's $25/yr adds up to roughly $325 in electricity alone, before purchase price or repairs.
Also sold as: Miele TWD160WP.
By the numbers
The Miele TWB120 WP 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 $25/yr, here is what the Miele TWB120 WP adds up to before purchase price, water, or repairs enter the math.
Left running for a decade at today's US average rate, the Miele TWB120 WP costs about $250. That is roughly $880 less than the class median, which would run closer to $1130 over the same ten years.
How the Miele TWB120 WP compares
The clothes dryer class we track runs from $23 to $128 a year. At $25/yr, it runs about $88 a year cheaper than the class median of $113, and it is about $2 a year more than the cheapest clothes dryer to run at $23.
What drives its running cost
At 4.1 cu ft, the Miele TWB120 WP is a small clothes dryer for its class, which spans 3.8 to 9.2 cu ft with a median of 7.4 cu ft, and smaller clothes dryer models generally cost less to run for the same job, all else being equal. Beyond size, its CEF of 6.37, above the class median of 3.93, is the class's own efficiency yardstick, combined energy factor, and it is what separates two similarly sized models with different running costs.
- Heat source and Combined Energy Factor (CEF). Heat-pump dryers recycle heat instead of generating it fresh with a resistance coil, and typically use meaningfully less electricity per load than a conventional resistance dryer, at the cost of a longer cycle; CEF is the federal figure that captures this.
- Drum capacity. A larger drum can dry a bigger load per cycle, but it also usually needs more energy per cycle to heat the extra air volume.
Common questions
Is the Miele TWB120 WP cheap to run?
Yes. Its $25/yr running cost puts it at rank #13 of 615, below what most clothes dryer models we track cost to run.
How much does the Miele TWB120 WP cost per month?
About $2.06 a month, which is the $25 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: 133 kWh from ENERGY STAR times the US average of $0.1856/kWh comes to about $25 a year. It covers electricity only, not the purchase price, water, or installation.
How efficient is the Miele TWB120 WP for its size?
98th percentile once size is factored in. That means its size-adjusted efficiency is a real factor in the running-cost figure above; its capacity plays a large role too.
Cheaper to run in the same class
| Rank | Model | Cost/yr |
|---|---|---|
| 6 | Miele TWI180 WP4.1 cu ft | $25 |
| 5 | Miele TWF160 WP4.1 cu ft | $25 |
| 4 | Samsung DV25FG50*0**4 cu ft | $23 |
| 3 | Samsung DV25B69**H*4 cu ft | $23 |
| 2 | Bosch WTW87NH1UC4 cu ft | $23 |
Source
ES_0031629_TWB120 WP_09052018023030_70196998View certified clothes dryer listingsENERGY STAR data as of July 2026Miele and TWB120 WP 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.