Model
Lg Signature WM9998H*A
Rank #61 means 60 of the 615 clothes dryer models we track cost less to run each year; the 92nd efficiency percentile means it uses less energy for its size than 92% of those models.
What does the Lg Signature WM9998H*A cost to run per year?
Few clothes dryer models we track cost less to run than the Lg Signature WM9998H*A: about $58 a year, rank #61 of 615. Adjusted for its cef, it is more efficient than 92% of clothes dryer models we track, a strong result once size is taken into account. At a CEF of 7.6, 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 WKHC202H*A at $55/yr runs a little cheaper and the Ge GFT14ES*M*** at $59/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 WM9998H*A's $58/yr adds up to roughly $754 in electricity alone, before purchase price or repairs.
By the numbers
The Lg Signature WM9998H*A 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 $58/yr, here is what the Lg Signature WM9998H*A 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 WM9998H*A costs about $580. That is roughly $550 less than the class median, which would run closer to $1130 over the same ten years.
How the Lg Signature WM9998H*A compares
The clothes dryer class we track runs from $23 to $128 a year. At $58/yr, it runs about $55 a year cheaper than the class median of $113, and it is about $35 a year more than the cheapest clothes dryer to run at $23.
What drives its running cost
At 5.8 cu ft, the Lg Signature WM9998H*A 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, less capacity to service is usually the first reason a running-cost figure lands on the low side, before efficiency even enters the picture. Its CEF of 7.6, above the class median of 3.93, reflects combined energy factor: a higher figure means it wrings more useful work out of every kilowatt-hour, so it is the efficiency lever to weigh against raw size.
- Heat source and Combined Energy Factor (CEF). CEF combines drying performance with standby and off-mode energy use; for a given drum size, a higher CEF means less energy per pound of laundry dried, and heat-pump models usually post the highest figures in the class.
- Drum capacity. Drum capacity sets how much laundry one cycle can hold, and heating a bigger volume of air generally costs more energy per cycle.
Common questions
Is the Lg Signature WM9998H*A cheap to run?
Yes, relatively. At $58 a year it ranks #61 of 615 clothes dryer models we track, in the cheaper part of its class to run.
How much does the Lg Signature WM9998H*A cost per month?
Roughly $4.87/mo, spreading the $58/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 315 kWh from ENERGY STAR and multiply it by the US average residential electricity rate of $0.1856/kWh, giving about $58 a year. It is an electricity-only estimate and does not include purchase price, water, or installation.
How efficient is the Lg Signature WM9998H*A for its size?
92nd 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 |
|---|---|---|
| 60 | Lg WKHC202H*A7.2 cu ft | $55 |
| 59 | Gorenje DNPAHPU4.2 cu ft | $53 |
| 58 | Summit SLDHP3444.2 cu ft | $53 |
| 57 | Summit LBDHP2444.2 cu ft | $53 |
| 56 | Breda BRDH9270024.2 cu ft | $53 |
Source
ES_1118034_WM9998H*A_01192026114829_80285281View certified clothes dryer listingsENERGY STAR data as of July 2026Lg Signature and WM9998H*A 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.