Model
Summit ADADW18W
Rank #175 means 174 of the 709 dishwasher models we track cost less to run each year; the 21st efficiency percentile means it uses less energy for its size than 21% of those models.
What does the Summit ADADW18W cost to run per year?
At about $43 a year, the Summit ADADW18W undercuts most dishwasher models we track on running cost, rank #175 of 709. It uses 23.8% less energy than the U.S. federal standard model in its class, which would cost about $57/yr to run, a saving of roughly $14 a year. Capacity-normalized, it ranks ahead of just 21% of dishwasher models we track, a soft spot worth weighing against the dollar figure. This class has no published efficiency-factor figure beyond annual kWh itself, so at 10 place settings (the class spans 2 to 18), size is the clearest lever we can point to for this model's running cost.
Immediately around it on the leaderboard, the Summit ADADW18SS at $43/yr runs a little cheaper and the Summit ADADW24B at $43/yr runs a little more, a sense of how tightly models are packed at this point in the ranking. A dishwasher typically stays in service for somewhere around 9 years; over that span, the Summit ADADW18W's $43/yr adds up to roughly $387 in electricity alone, before purchase price or repairs.
Also sold as: Aeg F8242FI-18.
By the numbers
The Summit ADADW18W 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 $43/yr, here is what the Summit ADADW18W adds up to before purchase price, water, or repairs enter the math.
Left running for a decade at today's US average rate, the Summit ADADW18W costs about $430. That is roughly $140 less than a standard model in its class, which would run closer to $570 over the same ten years.
How the Summit ADADW18W compares
The dishwasher class we track runs from $15 to $45 a year. At $43/yr, it runs about $1 a year cheaper than the class median of $44, and it is about $28 a year more than the cheapest dishwasher to run at $15. Against the US federal standard model for its class at about $57/yr, the Summit ADADW18W uses 23.8% less energy.
What drives its running cost
At 10 place settings, the Summit ADADW18W is a small dishwasher for its class, which spans 2 to 18 place settings with a median of 14 place settings, at the small end of the class, capacity itself is doing a lot of the work to keep that figure down, separate from how efficient the unit actually is.
- Place-setting capacity. Place-setting capacity is the main driver of how much water a cycle has to heat, and heating that water is most of a dishwasher's electricity use.
- Water heating. Most dishwashers have a booster heater that raises incoming water to sanitizing temperature; this heating step, not the pump or motor, accounts for most of a cycle's electricity use.
- Cycle length and drying method. Heavy or sanitize cycles run longer and hotter than a normal or eco cycle, and heated-dry options cost more to run than air-dry or condensation drying.
Common questions
Is the Summit ADADW18W cheap to run?
Yes. Its $43/yr running cost puts it at rank #175 of 709, below what most dishwasher models we track cost to run.
How much does the Summit ADADW18W cost per month?
About $3.62 a month, which is the $43 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: 234 kWh from ENERGY STAR times the US average of $0.1856/kWh comes to about $43 a year. It covers electricity only, not the purchase price, water, or installation.
How efficient is the Summit ADADW18W for its size?
21st percentile once size is factored in, a fairly typical result for the class.
Cheaper to run in the same class
Source
ES_92282_ADADW18W_100220231711329_2706945View certified dishwasher listingsENERGY STAR data as of July 2026Summit and ADADW18W 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.