Data through April 2026
Running cost · Room Air Conditioners · ENERGY STAR certified
DELLA 048-TL-W12KI
Under the DOE test basis of 750 hours a year, the DELLA 048-TL-W12KI draws 600 kWh — about $113 at the U.S. average rate, concentrated in the months you actually run it. Efficiency-wise it's unremarkable in a good way: within 13% of the median certified room air conditioner (rank 230 of 396). Where you live moves the bill from $74 a year in North Dakota to $280 in Hawaii.
Estimated annual running cost · U.S. average rate 18.8¢/kWh
$113/yr
- Per month
- $9.41
- Per day
- 31¢
- Certified use
- 600 kWh/yr
- Cooling capacity
- 12,000 BTU/hr
- CEER
- 15
- Mounting
- Does Not Straddle Window or Windowsill
- Variable-speed compressor
- Yes
What it costs in every state
| State | Rate ¢/kWh | This model $/yr | Relative cost |
|---|---|---|---|
| Alabama | 17.4¢ | $104 | |
| Alaska | 27.4¢ | $164 | |
| Arizona | 15.5¢ | $93 | |
| Arkansas | 14.2¢ | $85 | |
| California | 35.3¢ | $212 | |
| Colorado | 16.5¢ | $99 | |
| Connecticut | 32.2¢ | $193 | |
| Delaware | 18.8¢ | $113 | |
| District of Columbia | 25.4¢ | $152 | |
| Florida | 15.4¢ | $92 | |
| Georgia | 15.4¢ | $92 | |
| Hawaiipriciest | 46.6¢ | $280 | |
| Idaho | 12.7¢ | $76 | |
| Illinois | 20.5¢ | $123 | |
| Indiana | 17.9¢ | $107 | |
| Iowa | 13.9¢ | $83 | |
| Kansas | 15.8¢ | $95 | |
| Kentucky | 15.0¢ | $90 | |
| Louisiana | 14.4¢ | $87 | |
| Maine | 28.4¢ | $171 | |
| Maryland | 22.1¢ | $132 | |
| Massachusetts | 29.4¢ | $177 | |
| Michigan | 21.4¢ | $128 | |
| Minnesota | 16.4¢ | $98 | |
| Mississippi | 16.8¢ | $101 | |
| Missouri | 14.0¢ | $84 | |
| Montana | 13.9¢ | $83 | |
| Nebraska | 13.3¢ | $80 | |
| Nevada | 14.3¢ | $86 | |
| New Hampshire | 27.2¢ | $163 | |
| New Jersey | 23.5¢ | $141 | |
| New Mexico | 15.2¢ | $91 | |
| New York | 29.4¢ | $177 | |
| North Carolina | 16.3¢ | $98 | |
| North Dakotacheapest | 12.3¢ | $74 | |
| Ohio | 19.5¢ | $117 | |
| Oklahoma | 13.3¢ | $80 | |
| Oregon | 15.8¢ | $95 | |
| Pennsylvania | 21.5¢ | $129 | |
| Rhode Island | 28.3¢ | $170 | |
| South Carolina | 17.1¢ | $102 | |
| South Dakota | 14.5¢ | $87 | |
| Tennessee | 14.9¢ | $90 | |
| Texas | 17.0¢ | $102 | |
| Utah | 13.3¢ | $80 | |
| Vermont | 24.6¢ | $147 | |
| Virginia | 17.4¢ | $104 | |
| Washington | 14.4¢ | $86 | |
| West Virginia | 16.1¢ | $96 | |
| Wisconsin | 19.2¢ | $115 | |
| Wyoming | 14.7¢ | $88 |
Certified models closest in efficiency
| Model | kWh/yr | $/yr (US avg) |
|---|---|---|
| BLACK+DECKER BD12NWES | 600 | $113 |
| Century RXTS-121A | 600 | $113 |
| Comfort Aire RXTS-121A | 600 | $113 |
| Danby DAC120ECBIWDB | 600 | $113 |
| ELEMENT EHWR12BE | 600 | $113 |
| Friedrich CCV12A10A | 600 | $113 |
Run your own numbers
Your rate, your numbers
- Per day
- 31¢
- Per month
- $9.41
- Per year
- $113
600 kWh/yr × 18.8¢/kWh = $113/yr
Prefilled with this model's certified 600 kWh/yr — adjust if your usage differs from the DOE test basis. The certified annual kWh assumes 750 cooling hours per year (the DOE standard). In hot climates real usage can run well above that; in mild ones, below.
Certified variants covered by this entry
048-TL-W12KI · 048-TL-W12KI
Questions, answered with the data
- How much electricity does the DELLA 048-TL-W12KI use?
- ENERGY STAR certifies the DELLA 048-TL-W12KI at 600 kWh per year. The certified annual kWh assumes 750 cooling hours per year (the DOE standard). In hot climates real usage can run well above that; in mild ones, below.
- How much does the DELLA 048-TL-W12KI cost to run per month?
- About $9.41 a month at the U.S. average residential rate (18.8¢/kWh) — 31¢ a day, or $113 a year. Your state's rate moves this up or down; see the table above.
- Is the DELLA 048-TL-W12KI energy efficient?
- It uses 13% more electricity than the median certified room air conditioner.
- What does the DELLA 048-TL-W12KI cost to run in the cheapest vs. priciest state?
- At current residential rates it costs about $74 a year in North Dakota (12.3¢/kWh) and $280 in Hawaii (46.6¢/kWh).
- Does this figure cover other model numbers?
- Yes — 2 certified retail variants (color, finish, and store-specific SKUs) share this exact energy certification. They're listed under "Certified variants" on this page.