Model
Lg WM4200H*A
Rank #149 means 148 of the 388 washing machine models we track cost less to run each year; the 80th efficiency percentile means it uses less energy for its size than 80% of those models.
What does the Lg WM4200H*A cost to run per year?
The Lg WM4200H*A is a relatively cheap runner for its class: about $19 a year, rank #149 of 388. Efficiency-wise, once capacity is accounted for, it beats 80% of the class, a solidly strong result rather than a size-driven fluke. Its IMEF of 3.1 reflects integrated modified energy factor, one of the class's core efficiency levers.
Immediately around it on the leaderboard, the Lg WM4100H*A at $19/yr runs a little cheaper and the Lg WM4500H*A at $19/yr runs a little more, a sense of how tightly models are packed at this point in the ranking. A washing machine typically stays in service for somewhere around 10 years; over that span, the Lg WM4200H*A's $19/yr adds up to roughly $190 in electricity alone, before purchase price or repairs.
Also sold as: Lg WM4500H*A, Lg WM6500H*A, Lg WM6700H*A, Lg WSEX200H*A, Lg WSGX201H*A, Samsung WV60M99**A***.
By the numbers
The Lg WM4200H*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 $19/yr, here is what the Lg WM4200H*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 WM4200H*A costs about $190. That is roughly $10 less than the class median, which would run closer to $200 over the same ten years.
How the Lg WM4200H*A compares
The washing machine class we track runs from $7 to $58 a year. At $19/yr, it runs about $1 a year cheaper than the class median of $20, and it is about $12 a year more than the cheapest washing machine to run at $7.
What drives its running cost
At 5 cu ft, the Lg WM4200H*A is a mid-size washing machine for its class, which spans 1.9 to 6 cu ft with a median of 4.5 cu ft, neither the size advantage of a small unit nor the size penalty of a large one applies here, so its running cost is a fairer test of efficiency alone. Beyond size, its IMEF of 3.1, above the class median of 2.76, is the class's own efficiency yardstick, integrated modified energy factor, and it is what separates two similarly sized models with different running costs.
- Spin and wash efficiency (IMEF). A higher Integrated Modified Energy Factor means the machine wrings more useful washing (and a drier spin) out of every kilowatt-hour and gallon it uses.
- Drum volume. Drum volume sets the ceiling on how much a single cycle can wash, and it is usually the first driver of a washer's per-cycle energy use.
- Water heating. Cycle temperature, more than drum size, is usually what separates a cheap wash cycle from an expensive one on models with an internal water heater.
Common questions
Is the Lg WM4200H*A cheap to run?
Yes, relatively. At $19 a year it ranks #149 of 388 washing machine models we track, in the cheaper part of its class to run.
How much does the Lg WM4200H*A cost per month?
Roughly $1.62/mo, spreading the $19/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 105 kWh from ENERGY STAR and multiply it by the US average residential electricity rate of $0.1856/kWh, giving about $19 a year. It is an electricity-only estimate and does not include purchase price, water, or installation.
How efficient is the Lg WM4200H*A for its size?
80th percentile once size is factored in, a fairly typical result for the class.
Cheaper to run in the same class
| Rank | Model | Cost/yr |
|---|---|---|
| 148 | Lg WM4100H*A4.5 cu ft | $19 |
| 147 | Lg WM4080H*A4.5 cu ft | $19 |
| 146 | Lg WM4000H*A4.5 cu ft | $19 |
| 145 | Lg WM3900H*A4.5 cu ft | $19 |
| 144 | Lg WM3850H*A4.5 cu ft | $19 |
Source
ES_1118034_WM4200H*A_05252020115847_80043606View certified washing machine listingsENERGY STAR data as of July 2026Lg and WM4200H*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.