Data through April 2026
Cost to run · Washington · 14.4¢/kWh residential average
How much does it cost to run a room air conditioner in Washington?
$76/yr · median certified model
Washington's 14.4¢/kWh rate undercuts the national average by 24%, so the typical certified room air conditioner costs roughly $76 a year here instead of $100.
Washington ranks 11 of 51 jurisdictions for room air conditioner running costs — solidly mid-table. Model choice matters as much as geography: at Washington rates the most efficient certified model (TCL T05WV9M) costs $39 a year while the most power-hungry (Friedrich KCVL36B30A) costs $301 — a spread of $262 every year. For reference, the national extremes are North Dakota (12.3¢/kWh) and Hawaii (46.6¢/kWh); the same median room air conditioner would cost $66 and $248 a year there.
The cheapest room air conditioners to run at Washington rates
| # | Model | kWh/yr | $/yr in WA |
|---|---|---|---|
| 1 | TCL T05WV9M | 274 | $39 |
| 2 | TCL T05WV9MB | 274 | $39 |
| 3 | TCL T05WV9R | 274 | $39 |
| 4 | TCL T05WV9RB | 274 | $39 |
| 5 | TCL W5WC72 | 274 | $39 |
| 6 | TCL W5WC72-B | 274 | $39 |
| 7 | TCL W5WC72M | 274 | $39 |
| 8 | TCL W5WC72M-B | 274 | $39 |
| 9 | LG LW6023IVSMmost efficient | 290 | $42 |
| 10 | Midea MAW06U1QWTmost efficient | 298 | $43 |
Price any model at Washington rates
Your rate, your numbers
- Per day
- 21¢
- Per month
- $6.37
- Per year
- $76
532 kWh/yr × 14.4¢/kWh = $76/yr
Prefilled with the median certified room air conditioner (532 kWh/yr). Every model page on this site carries its exact certified figure.
Questions, answered with the data
- How much does it cost to run a room air conditioner in Washington?
- About $76 a year for the median ENERGY STAR certified room air conditioner, at Washington's average residential rate of 14.4¢/kWh — that's $6.37 a month.
- Is electricity expensive in Washington?
- Washington's residential average of 14.4¢/kWh is 24% below the U.S. average of 18.8¢/kWh, ranking 11 of 51 jurisdictions (1 = cheapest).
- What's the cheapest room air conditioner to run in Washington?
- Among currently certified models, the TCL T05WV9M costs the least at about $39 a year at Washington rates (274 kWh/yr).
- How does Washington compare with other states?
- The same median room air conditioner costs $66 a year in North Dakota (the cheapest state) and $248 in Hawaii (the priciest). Washington sits at $76.
Keep digging
- All certified room air conditioners compared
- Room Air Conditioners costs in Arkansas (rank 9 of 51)
- Room Air Conditioners costs in Nevada (rank 10 of 51)
- Room Air Conditioners costs in Louisiana (rank 12 of 51)
- Room Air Conditioners costs in South Dakota (rank 13 of 51)
- Running an air purifier in Washington
- Running a clothes dryer in Washington
- Running a clothes washer in Washington
- Running a computer monitor in Washington
Rate source: US EIA, average residential price of electricity, see methodology.