Keystone KSTAW12INV-HC Running Cost (Room Air Conditioner)
Running cost for the Keystone KSTAW12INV-HC
The Keystone KSTAW12INV-HC is certified by ENERGY STAR at 676.7 kWh a year, more expensive than most models in its category to run among room air conditioners currently certified.
That $127 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
The category average is 603 kWh/yr; this model runs 12.2% above it, ranking 350 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 $14/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 Keystone KSTAW12INV-HC: TCL W14WC72-B ($123/yr, 656.3 kWh/yr), then LUBECK 57H-ID0-B12HRFN8BCL0 ($127/yr, 676.7 kWh/yr).
Comparing Keystone's own models
Ranked 8 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 KSTAW12INV-HC costs roughly $1,272 in electricity, separate from the purchase price.
Shopping for a new one
The Keystone KSTAW12INV-HC runs above its category average. If the room air conditioner you actually own is older still, likely well past ENERGY STAR's efficiency baseline when it was made, a current certified model could cost meaningfully less than this model's $127/year every year.
Compare current ENERGY STAR certified room air conditioners before buying.
If you're keeping it
Whether or not the Keystone KSTAW12INV-HC 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
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.