Model
Lg Signature DLGX9901*
Rank #493 means 492 of the 615 clothes dryer models we track cost less to run each year; the 77th efficiency percentile means it uses less energy for its size than 77% of those models.
What does the Lg Signature DLGX9901* cost to run per year?
The Lg Signature DLGX9901* costs about $127 a year to run, well up the cost table for its class at rank #493 of 615. Size-adjusted, this model beats 77% of clothes dryer models we track on efficiency, better than most of its class. At a CEF of 3.49, 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 Lg DLG8481*E at $127/yr runs a little cheaper and the Lg DLG8201* at $127/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 Lg Signature DLGX9901*'s $127/yr adds up to roughly $1651 in electricity alone, before purchase price or repairs.
Also sold as: Lg DLGX8901*.
By the numbers
The Lg Signature DLGX9901* 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 $127/yr, here is what the Lg Signature DLGX9901* adds up to before purchase price, water, or repairs enter the math.
Left running for a decade at today's US average rate, the Lg Signature DLGX9901* costs about $1270. That is roughly $140 more than the class median, which would run closer to $1130 over the same ten years.
How the Lg Signature DLGX9901* compares
The clothes dryer class we track runs from $23 to $128 a year. At $127/yr, it runs about $14 a year above the class median of $113, and it is about $104 a year more than the cheapest clothes dryer to run at $23.
What drives its running cost
At 9 cu ft, the Lg Signature DLGX9901* is a large clothes dryer for its class, which spans 3.8 to 9.2 cu ft with a median of 7.4 cu ft, among clothes dryer models, bigger capacity is the most common reason a running-cost figure lands on the high side, all else being equal. Beyond size, its CEF of 3.49, below 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 Lg Signature DLGX9901* cheap to run?
Its $127/yr running cost, rank #493 of 615, is above what most clothes dryer models we track cost to run, so this is not one of the cheaper picks on electricity alone.
How much does the Lg Signature DLGX9901* cost per month?
About $10.59 a month, which is the $127 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: 685 kWh from ENERGY STAR times the US average of $0.1856/kWh comes to about $127 a year. It covers electricity only, not the purchase price, water, or installation.
How efficient is the Lg Signature DLGX9901* for its size?
77th 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 |
|---|---|---|
| 507 | Lg DLG8481*E7.3 cu ft | $127 |
| 506 | Lg DLGX8601*E7.3 cu ft | $127 |
| 505 | Lg DLG8401*E7.3 cu ft | $127 |
| 504 | Lg SWWG50*47.4 cu ft | $127 |
| 503 | Lg SWWG50*37.4 cu ft | $127 |
Source
ES_1118034_DLGX9901*_06112024105128_80215128View certified clothes dryer listingsENERGY STAR data as of July 2026Lg Signature and DLGX9901* 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.