Keystone KSTAW121WA Running Cost (Room Air Conditioner)
What the Keystone KSTAW121WA costs to run
The Keystone KSTAW121WA is certified by ENERGY STAR at 600 kWh a year, about average for its category to run among room air conditioners currently certified.
That $113 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 Keystone KSTAW121WA compares to other room air conditioners
Against the category average of 603 kWh/yr, this model uses 0.5% less, ranking 283 of 447 room air conditioners tracked here for running cost. 447 certified room air conditioners, one average, about $1/year of daylight between it and this model; the full methodology has the rest.
Neighbouring models
Right next to the Keystone KSTAW121WA on that list: Keplerx KARC12RSVE1 ($113/yr, 600 kWh/yr) runs slightly less, while Keystone KSTAW12INV ($113/yr, 600 kWh/yr) runs slightly more.
Within the Keystone lineup
Ranked 6 of Keystone's 11 certified room air conditioners, this sits between the KSTAW081WA ($75/yr, the brand's cheapest) and the KSTAW242WA ($254/yr, its priciest).
What this adds up to over time
Over the 10-year service life NAHB reports for this category, running the Keystone KSTAW121WA costs roughly $1,128 in electricity, separate from the purchase price.
Is it worth replacing?
Efficient as certified room air conditioners go, $113/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
The Keystone KSTAW121WA already costs $113/year to run; a repair bill on top of that is the kind of expense a protection plan exists to smooth out.
How this was checked
Two sourced numbers, nothing modeled: ENERGY STAR's certified kWh/yr for this exact model, and EIA's published state electricity rate. Ranked 283 of 447, the Keystone KSTAW121WA sits in the middle of the room air conditioner category, see the guide to why your state changes this number for the other half of the math.