DELLA 048-TL-W10KI: running cost
The DELLA 048-TL-W10KI is certified by ENERGY STAR at 500 kWh a year, cheaper than most models in its category to run among room air conditioners currently certified.
That $94 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.
Efficient, or not, for a room air conditioner
Against the category average of 603 kWh/yr, this model uses 17.1% less, ranking 166 of 447 room air conditioners tracked here for running cost. That average is drawn from all 447 room air conditioners ENERGY STAR currently certifies, not an outside number, a $19/year gap from this model at the national rate. Full sourcing is in the sourcing notes.
Right next to it on the list
A rank or two either side of the DELLA 048-TL-W10KI: Danby DAC100B8IWDB-6 ($94/yr, 500 kWh/yr), then ELEMENT EHWR10BE ($94/yr, 500 kWh/yr).
Same brand, different models
Ranked 2 of DELLA's 3 certified room air conditioners, this sits between the 048-TL-W8KI ($75/yr, the brand's cheapest) and the 048-TL-W12KI ($113/yr, its priciest).
DELLA 048-TL-W10KI over 10 years
NAHB's Study of Life Expectancy of Home Components puts a typical room air conditioner's service life at 10 years; run the DELLA 048-TL-W10KI that long and it costs about $940 in electricity, on top of whatever it cost to buy.
Is it worth replacing?
Efficient as certified room air conditioners go, $94/year is a reasonable baseline if you're comparing what else is on the market.
Compare current ENERGY STAR certified room air conditioners before buying.
If you're keeping it
Whether or not the DELLA 048-TL-W10KI ever needs replacing, a repair is the more common failure for a room air conditioner, one a protection plan budgets for ahead of time.
Where this number comes from
At rank 166 of 447 for running cost, see the room air conditioner category page for the rest of the field, or the guide to how much your state matters. The 500 kWh/yr figure is ENERGY STAR's own certification, not a wattage estimate; exact dataset IDs are on the data sources page.