Model
Whirlpool WFW6620H**
Rank #279 means 278 of the 388 washing machine models we track cost less to run each year; the 42nd efficiency percentile means it uses less energy for its size than 42% of those models.
What does the Whirlpool WFW6620H** cost to run per year?
The Whirlpool WFW6620H** costs about $26 a year to run, more than most of the 388 washing machine models we track; it ranks #279. Capacity-normalized, it ranks ahead of 42% of washing machine models we track, right in the class's middle band. Its IMEF of 2.76 reflects integrated modified energy factor, one of the class's core efficiency levers.
Immediately around it on the leaderboard, the Whirlpool WFW5620H** at $26/yr runs a little cheaper and the Ge GUD27EE*N*** at $26/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 Whirlpool WFW6620H**'s $26/yr adds up to roughly $260 in electricity alone, before purchase price or repairs.
Also sold as: Whirlpool WFC682CL**.
By the numbers
The Whirlpool WFW6620H** 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 $26/yr, here is what the Whirlpool WFW6620H** adds up to before purchase price, water, or repairs enter the math.
Left running for a decade at today's US average rate, the Whirlpool WFW6620H** costs about $260. That is roughly $60 more than the class median, which would run closer to $200 over the same ten years.
How the Whirlpool WFW6620H** compares
The washing machine class we track runs from $7 to $58 a year. At $26/yr, it runs about $6 a year above the class median of $20, and it is about $19 a year more than the cheapest washing machine to run at $7.
What drives its running cost
At 4.5 cu ft, the Whirlpool WFW6620H** 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. Its IMEF of 2.76, above the class median of 2.76, reflects integrated modified 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.
- Spin and wash efficiency (IMEF). IMEF is this class's core efficiency yardstick; two washers with the same drum size can carry meaningfully different IMEF figures and running costs.
- Drum volume. A larger-capacity washer can wash more per load, which can lower cost per pound of laundry, but it also draws more water and energy per cycle if you are not filling it.
- Water heating. Most washers rely on your home's hot water supply, but internal-heater sanitize or hot-wash cycles use meaningfully more electricity than a cold or warm wash.
Common questions
Is the Whirlpool WFW6620H** cheap to run?
Its $26/yr running cost, rank #279 of 388, is above what most washing machine models we track cost to run, so this is not one of the cheaper picks on electricity alone.
How much does the Whirlpool WFW6620H** cost per month?
About $2.15 a month, which is the $26 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: 139 kWh from ENERGY STAR times the US average of $0.1856/kWh comes to about $26 a year. It covers electricity only, not the purchase price, water, or installation.
How efficient is the Whirlpool WFW6620H** for its size?
42nd percentile once size is factored in. That means its size-adjusted efficiency is not the main reason for the running-cost figure above; its capacity plays a large role too.
Cheaper to run in the same class
| Rank | Model | Cost/yr |
|---|---|---|
| 280 | Whirlpool WFW5620H**4.5 cu ft | $26 |
| 279 | Whirlpool WFC682CL**4.5 cu ft | $26 |
| 278 | Ge GTW575BM***4.3 cu ft | $25 |
| 277 | Ge GTW560BM***4.3 cu ft | $25 |
| 276 | Ge Profile PFW955S*W***5.5 cu ft | $25 |
Source
ES_15649_WFW6620H**_10142018184846_2926289View certified washing machine listingsENERGY STAR data as of July 2026Whirlpool and WFW6620H** 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.