WM9998H*A (LG SIGNATURE, ENERGY STAR Most Efficient) uses 315 kWh per year, an estimated $53.55/yr to run, ranking 13th cheapest of 80 sampled clothes dryers, 48% below the $103.36/yr median of the 80 sampled models.
Certification: ENERGY STAR Most Efficient
WM9998H*A
Paste into the Amazon search box to find this exact modelAs an Amazon Associate I earn from qualifying purchases.
| Cost rank in category | 13th of 80 |
| Cost percentile | bottom 15% |
| Vs category median | 48% below ($103.36/yr) |
| Rank within same status | 7th of 7 (Median $22.61/yr) |
| Rank within similar capacity | 5th of 5 · drum capacity cu ft 4.64~6.96 (Median $35.36/yr) |
| Category low to high | $21.25/yr ~ $116.79/yr |
| Spec | Value |
|---|---|
| product type | Electric Standard Ventless |
| type | Electric |
| special type | Combination All-in-One Washer/Dryer |
| heat pump technology | Heat Pump |
| drum capacity cu ft | 5.8 |
| width inches | 29 |
| combined energy factor cef | 7.6 |
| estimated annual energy use kwh yr | 315 |
| energy test cycle information | Dry Only, Normal |
| additional dryer features | None |
| refrigerant type | R-134a |
| refrigerant with gwp | R-134a (GWP:1430) |
| connected | No |
| calculated combined energy factor max dryness setting lbs kwh | 5.92 |
| date available on market | 2026-01-12 |
| date qualified | 2026-01-12 |
| Model | Certification | Est. energy cost |
|---|---|---|
| T5HXLW.U | ENERGY STAR Certified | $35.36/yr |
| T5HXLT.U | ENERGY STAR Certified | $35.36/yr |
| DLE5180* | ENERGY STAR Certified | $103.19/yr |
| DLG5181* | ENERGY STAR Certified | $116.45/yr |
| DH5S452BB | ENERGY STAR Certified | $73.95/yr |
The LG SIGNATURE WM9998H*A is certified at 315 kWh per year, which works out to about $53.55/yr at the flat rate assumed on this site. Certified figures come from standardized test procedures, so your actual bill varies with usage and your local electricity rate.
Among the 80 clothes dryers compared on this site, the LG SIGNATURE WM9998H*A ranks 13th cheapest to run and sits in the bottom 15% of the cost range. That is 48% below the category median of $103.36/yr. The cheapest sampled model runs at $21.25/yr and the most expensive at $116.79/yr.
The LG SIGNATURE WM9998H*A is listed as ENERGY STAR Most Efficient. Among the 7 sampled clothes dryers with that status the median running cost is $22.61/yr, and the LG SIGNATURE WM9998H*A ranks 7th cheapest within that group. Certification status reflects efficiency relative to product class, not absolute energy use.
Using the certified drum capacity cu ft value of 5.8, 5 sampled models fall within +/-20% (4.64 to 6.96), and the LG SIGNATURE WM9998H*A ranks 5th cheapest among them. The median for that size band is $35.36/yr. Comparing within a size band is more meaningful than comparing certification labels.
Simple estimate, 30 days per month (assuming $0.17/kWh)