Model
Summit ADADW18NT
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 ADADW18NT cost to run per year?
The Summit ADADW18NT is a relatively cheap runner for its class: about $43 a year, 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. Its 21th size-adjusted efficiency percentile is a step behind the class median, though not among the weakest results. At 10 place settings, it is a small dishwasher for the class, which runs 2 to 18 place settings; size and efficiency are the two levers behind the figure above, and this dataset does not carry a separate efficiency-factor column for this class.
Immediately around it on the leaderboard, the Summit ADADW18B at $43/yr runs a little cheaper and the Summit ADADW18SS 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 ADADW18NT'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 ADADW18NT 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 ADADW18NT 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 ADADW18NT 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 ADADW18NT 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 ADADW18NT uses 23.8% less energy.
What drives its running cost
At 10 place settings, the Summit ADADW18NT is a small dishwasher for its class, which spans 2 to 18 place settings with a median of 14 place settings, and smaller dishwasher models generally cost less to run for the same job, all else being equal.
- Place-setting capacity. A larger dishwasher heats more water per cycle, so bigger capacity generally means a higher annual energy figure, independent of how efficient the unit is.
- Water heating. The booster heater that brings water up to sanitizing temperature is usually the single largest electrical load in a dishwasher's cycle.
- Cycle length and drying method. Cycle selection, eco versus heavy, air-dry versus heated-dry, moves real running cost more than most owners realize for a given capacity.
Common questions
Is the Summit ADADW18NT cheap to run?
Yes, relatively. At $43 a year it ranks #175 of 709 dishwasher models we track, in the cheaper part of its class to run.
How much does the Summit ADADW18NT cost per month?
Roughly $3.62/mo, spreading the $43/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 234 kWh from ENERGY STAR and multiply it by the US average residential electricity rate of $0.1856/kWh, giving about $43 a year. It is an electricity-only estimate and does not include purchase price, water, or installation.
How efficient is the Summit ADADW18NT for its size?
21st percentile once size is factored in, a fairly typical result for the class.
Cheaper to run in the same class
| Rank | Model | Cost/yr |
|---|---|---|
| 246 | Summit ADADW18B10 place settings | $43 |
| 245 | Spt SD-9254W8 place settings | $43 |
| 244 | Spt SD-9254SS8 place settings | $43 |
| 243 | Smeg STU18228 place settings | $43 |
| 242 | Smeg DW8601X14 place settings | $43 |
Source
ES_92282_ADADW18NT_100220231710393_7385285View certified dishwasher listingsENERGY STAR data as of July 2026Summit and ADADW18NT 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.