Data through June 2026
Running cost · Air Purifiers · ENERGY STAR certified
Coway AP-1125G
At the standardized usage ENERGY STAR assumes, the Coway AP-1125G consumes 195 kWh a year — about $36 at the U.S. average electricity rate ($2.98 a month). Efficiency-wise it's unremarkable in a good way: within 32% of the median certified air purifier (rank 136 of 225). Where you live moves the bill from $26 a year in Nevada to $103 in Hawaii. Note the certified pool here is small (225 models), so rankings shift more with each data refresh.
Estimated annual running cost · U.S. average rate 18.3¢/kWh
$36/yr
- Per month
- $2.98
- Per day
- 10¢
- Certified use
- 195 kWh/yr
- Rated room size
- 287 sq ft
- CADR (smoke)
- 185
- Technology
- Fan and Filter
- Efficiency
- 5.8 CFM/W
What it costs in every state
| State | Rate ¢/kWh | This model $/yr | Relative cost |
|---|---|---|---|
| Alabama | 16.4¢ | $32 | |
| Alaska | 28.2¢ | $55 | |
| Arizona | 15.2¢ | $30 | |
| Arkansas | 14.1¢ | $28 | |
| California | 34.7¢ | $68 | |
| Colorado | 17.1¢ | $33 | |
| Connecticut | 24.3¢ | $47 | |
| Delaware | 19.3¢ | $38 | |
| District of Columbia | 24.4¢ | $48 | |
| Florida | 15.1¢ | $29 | |
| Georgia | 16.4¢ | $32 | |
| Hawaiipriciest | 52.7¢ | $103 | |
| Idaho | 14.4¢ | $28 | |
| Illinois | 19.9¢ | $39 | |
| Indiana | 17.5¢ | $34 | |
| Iowa | 15.9¢ | $31 | |
| Kansas | 15.7¢ | $31 | |
| Kentucky | 14.3¢ | $28 | |
| Louisiana | 13.5¢ | $26 | |
| Maine | 29.6¢ | $58 | |
| Maryland | 21.8¢ | $43 | |
| Massachusetts | 29.6¢ | $58 | |
| Michigan | 23.0¢ | $45 | |
| Minnesota | 17.5¢ | $34 | |
| Mississippi | 14.9¢ | $29 | |
| Missouri | 16.2¢ | $32 | |
| Montana | 15.1¢ | $30 | |
| Nebraska | 13.3¢ | $26 | |
| Nevadacheapest | 13.1¢ | $26 | |
| New Hampshire | 27.0¢ | $53 | |
| New Jersey | 24.9¢ | $49 | |
| New Mexico | 15.1¢ | $29 | |
| New York | 29.5¢ | $58 | |
| North Carolina | 14.7¢ | $29 | |
| North Dakota | 14.1¢ | $28 | |
| Ohio | 19.2¢ | $37 | |
| Oklahoma | 14.3¢ | $28 | |
| Oregon | 16.3¢ | $32 | |
| Pennsylvania | 21.7¢ | $42 | |
| Rhode Island | 29.2¢ | $57 | |
| South Carolina | 15.6¢ | $30 | |
| South Dakota | 15.4¢ | $30 | |
| Tennessee | 14.1¢ | $27 | |
| Texas | 15.9¢ | $31 | |
| Utah | 13.4¢ | $26 | |
| Vermont | 24.4¢ | $48 | |
| Virginia | 17.2¢ | $34 | |
| Washington | 14.9¢ | $29 | |
| West Virginia | 15.4¢ | $30 | |
| Wisconsin | 19.6¢ | $38 | |
| Wyoming | 15.2¢ | $30 |
Certified models closest in efficiency
| Model | kWh/yr | $/yr (US avg) |
|---|---|---|
| AIRMEGA AP-1125G | 195 | $36 |
| Coway Airmega AP-1125G | 195 | $36 |
| LEVOIT LAP-C511S-WUSmost efficient | 194 | $36 |
| AIRMEGA W | 197 | $36 |
| Blueair 3332111100 | 193 | $35 |
| Coway Airmega W | 197 | $36 |
Run your own numbers
Your rate, your numbers
- Per day
- 10¢
- Per month
- $2.98
- Per year
- $36
195 kWh/yr × 18.3¢/kWh = $36/yr
Prefilled with this model's certified 195 kWh/yr — adjust if your usage differs from the DOE test basis. The certified annual kWh comes from the ENERGY STAR room air cleaner test basis, which assumes continuous daily operation. Running fewer hours costs proportionally less.
Questions, answered with the data
- How much electricity does the Coway AP-1125G use?
- ENERGY STAR certifies the Coway AP-1125G at 195 kWh per year. The certified annual kWh comes from the ENERGY STAR room air cleaner test basis, which assumes continuous daily operation. Running fewer hours costs proportionally less.
- How much does the Coway AP-1125G cost to run per month?
- About $2.98 a month at the U.S. average residential rate (18.3¢/kWh) — 10¢ a day, or $36 a year. Your state's rate moves this up or down; see the table above.
- Is the Coway AP-1125G energy efficient?
- It uses 32% more electricity than the median certified air purifier.
- What does the Coway AP-1125G cost to run in the cheapest vs. priciest state?
- At current residential rates it costs about $26 a year in Nevada (13.1¢/kWh) and $103 in Hawaii (52.7¢/kWh).