Running cost for the Kenmore 1458#
The Kenmore 1458# is certified by ENERGY STAR at 239 kWh a year, about average for its category to run among dishwashers currently certified.
That $45 is priced at 18.8¢/kWh, the average of all 51 state rates this site tracks. Your own state's rate is one click away.
How the Kenmore 1458# compares to other dishwashers
The category average is 232 kWh/yr; this model runs 3% above it, ranking 353 of 737 dishwashers tracked here for running cost. 737 certified dishwashers, one average, about $1/year of daylight between it and this model; the full methodology has the rest.
Neighbouring models
Right next to the Kenmore 1458# on that list: Hisense HUI66360XCUS ($45/yr, 239 kWh/yr) runs slightly less, while Kenmore 1459# ($45/yr, 239 kWh/yr) runs slightly more.
Within the Kenmore lineup
Ranked 9 of Kenmore's 19 certified dishwashers, this sits between the 1460# ($44/yr, the brand's cheapest) and the KKDW3RPHLIFT-45SS ($45/yr, its priciest).
What this adds up to over time
NAHB's Study of Life Expectancy of Home Components puts a typical dishwasher's service life at 9 years; run the Kenmore 1458# that long and it costs about $404 in electricity, on top of whatever it cost to buy.
Is it worth replacing?
Efficient as certified dishwashers go, $45/year is a reasonable baseline if you're comparing what else is on the market.
Compare current ENERGY STAR certified dishwashers before buying.
If you're keeping it
Whether or not the Kenmore 1458# ever needs replacing, a repair is the more common failure for a dishwasher, one a protection plan budgets for ahead of time.
How this was checked
At rank 353 of 737 for running cost, see the dishwasher category page for the rest of the field, or the guide to how much your state matters. The 239 kWh/yr figure is ENERGY STAR's own certification, not a wattage estimate; exact dataset IDs are on the data sources page.