How much does it cost to run a window air conditioner in Delaware?
Rated energy use of ENERGY STAR certified models × what electricity costs where you live.
What it costs to run a window air conditioner in Delaware
- A typical ENERGY STAR window window air conditioner (the median of 513 certified models) is rated at 500 kWh a year.
- At Delaware's residential price of 18.48¢ per kWh (July 2026), that comes to about $0.25 a day, $7.70 a month or $92 a year.
- Where you live matters: the same window air conditioner costs about $240 a year in Hawaii (48.00¢) and $64 in Louisiana (12.72¢).
- The most efficient window models of at least 10000 BTU/h use 469 kWh a year, which saves about $6 a year against the typical model at this price.
Ratings are the yearly kWh from the federal test procedure, as listed by ENERGY STAR. Real use depends on how you use the appliance, its age and settings. Older models that are not ENERGY STAR certified usually use more; we have no data on them. How we calculate.
Cost to run a window air conditioner by type
Yearly cost to run a window air conditioner in Delaware, by type: $92 to $120
Median rated use of ENERGY STAR certified models of each type, at 18.48¢ per kWh.
Source: ENERGY STAR certified products data (downloaded 2026-10-23); EIA residential electricity price, July 2026. Our calculation.
Show the numbers
| Per year | |
|---|---|
| Window | $92 |
| Through the Wall | $120 |
| Type | Models | Typical size | Typical use | Per month | Per year (range) |
|---|---|---|---|---|---|
| Window | 513 | 10,000 BTU/h | 500 kWh/yr | $7.70 | $92 ($69–$166) |
| Through the Wall | 65 | 12,000 BTU/h | 648 kWh/yr | $9.98 | $120 ($79–$140) |
Range: the 10th to 90th percentile of rated use among certified models of that type. derived
Your window air conditioner: use the EnergyGuide label
The yellow EnergyGuide label on a window air conditioner shows its estimated yearly use in kWh. Enter it to see what it costs at your state's rate.
Most energy efficient window and room air conditioners
ENERGY STAR certified models with the lowest rated yearly use, among models at or above the typical size for their type. Yearly cost at 18.48¢ per kWh.
Window (10000+ BTU/h)
| Brand | Model number | Size | kWh/yr | Per year | Less than federal standard |
|---|---|---|---|---|---|
| BLACK+DECKER | BDM10C | 10000 BTU/h | 469 | $87 | 47% |
| DuraSTAR | DRWAC101XVB1 | 10000 BTU/h | 469 | $87 | 47% |
| Frigidaire | FHWW105WF1 | 10000 BTU/h | 469 | $87 | 47% |
| Frigidaire | FHWW106WF1 | 10000 BTU/h | 469 | $87 | 47% |
| Frigidaire Gallery | GHWW105TF1 | 10000 BTU/h | 469 | $87 | 47% |
| GE | PWJV10W**# | 10000 BTU/h | 469 | $87 | 47% |
| GE Appliances | AWHV10***# | 10000 BTU/h | 469 | $87 | 47% |
| Midea | 1010451479 | 10000 BTU/h | 469 | $87 | 47% |
| Midea | 1014264129 | 10000 BTU/h | 469 | $87 | 47% |
| Midea | MAW10RV1KWT | 10000 BTU/h | 469 | $87 | 47% |
| Midea | MAW10S1KWT-A | 10000 BTU/h | 469 | $87 | 47% |
| Midea | MAW10U1KWT | 10000 BTU/h | 469 | $87 | 47% |
| Midea | MAW10U1KWT-A | 10000 BTU/h | 469 | $87 | 47% |
| Midea | MAW10U1KWT-M | 10000 BTU/h | 469 | $87 | 47% |
| Midea | MAW10U1QWT | 10000 BTU/h | 469 | $87 | 47% |
Through the Wall (12000+ BTU/h)
| Brand | Model number | Size | kWh/yr | Per year | Less than federal standard |
|---|---|---|---|---|---|
| Brothers | 102396 | 12000 BTU/h | 648 | $120 | 46% |
| Brothers | 102398 | 12000 BTU/h | 648 | $120 | 46% |
| DuraSTAR | DRTAC121XVB1 | 12000 BTU/h | 648 | $120 | 46% |
| DuraSTAR | DRTAC122XVB1 | 12000 BTU/h | 648 | $120 | 46% |
| Frigidaire | FHTC125WC1 | 12000 BTU/h | 648 | $120 | 46% |
| Frigidaire | FHTC125WC2 | 12000 BTU/h | 648 | $120 | 46% |
| Midea | MAT12R1FWTK | 12000 BTU/h | 648 | $120 | 46% |
| Midea | MAT12R1SWTK | 12000 BTU/h | 648 | $120 | 46% |
| Midea | MAT12R2FWTK | 12000 BTU/h | 648 | $120 | 46% |
| Midea | MAT12R2SWTK | 12000 BTU/h | 648 | $120 | 46% |
| Midea | MT12VB1 | 12000 BTU/h | 648 | $120 | 46% |
| Midea | MT12VB2 | 12000 BTU/h | 648 | $120 | 46% |
| Midea | MWEUTW-12CRFN8-BCM9 | 12000 BTU/h | 648 | $120 | 46% |
| Midea | MWEUTW-12CRFN8-MCM9 | 12000 BTU/h | 648 | $120 | 46% |
| PELONIS | PAT12R1KWT | 12000 BTU/h | 648 | $120 | 46% |
Model numbers are as listed by ENERGY STAR; an asterisk stands for any character (colour or trim codes). We do not sell or recommend products and have no affiliate links. official
Cost to run a window air conditioner in every state
Typical window model (500 kWh a year) at each state's residential price in July 2026.
| State | ¢ per kWh | Per month | Per year |
|---|---|---|---|
| Hawaii | 48.00 | $20.00 | $240 |
| California | 33.61 | $14.00 | $168 |
| Maine | 32.41 | $13.50 | $162 |
| Massachusetts | 30.49 | $12.70 | $152 |
| New York | 29.90 | $12.46 | $150 |
| Alaska | 28.83 | $12.01 | $144 |
| Rhode Island | 28.29 | $11.79 | $141 |
| New Hampshire | 26.60 | $11.08 | $133 |
| District of Columbia | 25.21 | $10.50 | $126 |
| New Jersey | 25.19 | $10.50 | $126 |
| Connecticut | 24.16 | $10.07 | $121 |
| Vermont | 23.75 | $9.90 | $119 |
| Michigan | 23.05 | $9.60 | $115 |
| Pennsylvania | 21.72 | $9.05 | $109 |
| Maryland | 21.41 | $8.92 | $107 |
| Ohio | 19.45 | $8.10 | $97 |
| Illinois | 19.22 | $8.01 | $96 |
| Wisconsin | 19.06 | $7.94 | $95 |
| Delaware | 18.48 | $7.70 | $92 |
| Virginia | 17.55 | $7.31 | $88 |
| Minnesota | 17.45 | $7.27 | $87 |
| Colorado | 17.00 | $7.08 | $85 |
| Indiana | 16.73 | $6.97 | $84 |
| Alabama | 16.40 | $6.83 | $82 |
| Georgia | 16.27 | $6.78 | $81 |
| Missouri | 16.09 | $6.70 | $80 |
| New Mexico | 16.09 | $6.70 | $80 |
| Iowa | 15.99 | $6.66 | $80 |
| Oregon | 15.97 | $6.65 | $80 |
| Texas | 15.88 | $6.62 | $79 |
| West Virginia | 15.78 | $6.57 | $79 |
| South Carolina | 15.47 | $6.45 | $77 |
| Arizona | 15.38 | $6.41 | $77 |
| South Dakota | 15.37 | $6.40 | $77 |
| Kansas | 15.27 | $6.36 | $76 |
| North Carolina | 15.16 | $6.32 | $76 |
| Florida | 15.03 | $6.26 | $75 |
| Montana | 14.99 | $6.25 | $75 |
| Washington | 14.71 | $6.13 | $74 |
| Mississippi | 14.54 | $6.06 | $73 |
| Wyoming | 14.36 | $5.98 | $72 |
| Oklahoma | 14.35 | $5.98 | $72 |
| Arkansas | 14.33 | $5.97 | $72 |
| Kentucky | 13.81 | $5.75 | $69 |
| Nebraska | 13.78 | $5.74 | $69 |
| Idaho | 13.73 | $5.72 | $69 |
| Tennessee | 13.71 | $5.71 | $69 |
| North Dakota | 13.41 | $5.59 | $67 |
| Utah | 13.12 | $5.47 | $66 |
| Nevada | 12.77 | $5.32 | $64 |
| Louisiana | 12.72 | $5.30 | $64 |
Other appliances
Sources and limits
- ENERGY STAR certified products data (U.S. EPA), 578 certified window and room air conditioners. Downloaded 2026-10-23.
- Electricity prices: EIA Electric Power Monthly, average residential price in July 2026.
- Only certified models are covered, so "typical" means a typical new efficient model, not the average one in use. Yearly ratings assume the usage in the federal test, which may differ from yours.