How These Costs Are Computed

One formula, two official sources, no estimates of ours.

The formula

cost per year = (annual kWh) × (electricity rate in ¢/kWh) ÷ 100

The Aeocky RHEA-RCS32(Y)-N4-3 is certified at 339 kWh/year. The US average residential rate is 18.34¢/kWh (June 2026).

339 × 18.34 ÷ 100 = $62.17 per year ≈ $62

Annual kWh per model: EPA's ENERGY STAR certified-products open data (data.energystar.gov, dataset mgiu-hu4z). This is the standardized annual energy figure each model reports for certification under the federal Appendix X1 test — measured the same way for every model, which is what makes the comparison fair.
Electricity rates: US Energy Information Administration, Electric Power Monthly, Table 5.6.A — average residential price by state, June 2026. National average: 18.34¢/kWh.

The certified kWh/year is a standardized test figure, not your meter reading. Run the unit more hours, in a damper basement, or on a higher fan speed and your real cost will be higher; run it less and it will be lower. The ranking between models, however, holds.
State rates are statewide residential averages. Your utility's exact rate may differ; if you know it, the formula above works with your number directly.
Yearly dollars are rounded to the nearest dollar on these pages; monthly figures keep cents.
Data refresh: quarterly. Models rejected by our validation checks (implausible capacity or energy figures) are excluded rather than published; exclusions are logged, never guessed at.