Keystone KSTAW08INV Running Cost (Room Air Conditioner)
What the Keystone KSTAW08INV costs to run
At 400 kWh/yr, the Keystone KSTAW08INV's ENERGY STAR certification puts it one of the cheaper models in its category to run against every other certified room air conditioner.
The $75 figure above uses the simple average of all 51 published state rates. Pick your state for the real number.
Keystone KSTAW08INV against the category
That's 33.7% below the room air conditioner category average of 603 kWh/yr, and ranks 84 of 447 certified room air conditioners for annual running cost, 1 being cheapest. The category average comes from every room air conditioner ENERGY STAR currently certifies (447 models), not an outside benchmark, about $38/year below that average at the national rate. See the methodology page.
What sits beside it in the ranking
Ktaxon KXTIW-08CRD1 ($75/yr, 400 kWh/yr) costs a little more to run than the Keystone KSTAW08INV. Keystone KSTAW081WA ($75/yr, 400 kWh/yr) costs a little less.
Comparing Keystone's own models
Keystone makes 11 ENERGY STAR certified room air conditioners; this one ranks 2 of 11 for running cost, between the brand's cheapest, the KSTAW081WA at $75/yr, and its priciest, the KSTAW242WA at $254/yr.
Keystone KSTAW08INV 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 Keystone KSTAW08INV that long and it costs about $752 in electricity, on top of whatever it cost to buy.
Weighing a replacement
The Keystone KSTAW08INV is already efficient for its category at $75/year. If you're shopping and comparing options, this is roughly what a well-chosen new room air conditioner costs to run.
Worth comparing a few current certified models before deciding.
Protecting what you have
Whether or not the Keystone KSTAW08INV ever needs replacing, a repair is the more common failure for a room air conditioner, one a protection plan budgets for ahead of time.
Sourcing
Two sourced numbers, nothing modeled: ENERGY STAR's certified kWh/yr for this exact model, and EIA's published state electricity rate. The full Room Air Conditioner category page shows all 447 room air conditioners ranked by cost; the state-rate guide covers the half of this number that isn't the appliance.