Data through April 2026
Running cost · Air Purifiers · ENERGY STAR certified
Coway Airmega AP-1125G
At the standardized usage ENERGY STAR assumes, the Coway Airmega AP-1125G consumes 195 kWh a year — about $37 at the U.S. average electricity rate ($3.06 a month). That's close to the middle of the certified pack — about 32% above the median air purifier, ranked 130 of 214. Where you live moves the bill from $24 a year in North Dakota to $91 in Hawaii. Note the certified pool here is small (214 models), so rankings shift more with each data refresh.
Estimated annual running cost · U.S. average rate 18.8¢/kWh
$37/yr
- Per month
- $3.06
- 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 | 17.4¢ | $34 | |
| Alaska | 27.4¢ | $53 | |
| Arizona | 15.5¢ | $30 | |
| Arkansas | 14.2¢ | $28 | |
| California | 35.3¢ | $69 | |
| Colorado | 16.5¢ | $32 | |
| Connecticut | 32.2¢ | $63 | |
| Delaware | 18.8¢ | $37 | |
| District of Columbia | 25.4¢ | $50 | |
| Florida | 15.4¢ | $30 | |
| Georgia | 15.4¢ | $30 | |
| Hawaiipriciest | 46.6¢ | $91 | |
| Idaho | 12.7¢ | $25 | |
| Illinois | 20.5¢ | $40 | |
| Indiana | 17.9¢ | $35 | |
| Iowa | 13.9¢ | $27 | |
| Kansas | 15.8¢ | $31 | |
| Kentucky | 15.0¢ | $29 | |
| Louisiana | 14.4¢ | $28 | |
| Maine | 28.4¢ | $55 | |
| Maryland | 22.1¢ | $43 | |
| Massachusetts | 29.4¢ | $57 | |
| Michigan | 21.4¢ | $42 | |
| Minnesota | 16.4¢ | $32 | |
| Mississippi | 16.8¢ | $33 | |
| Missouri | 14.0¢ | $27 | |
| Montana | 13.9¢ | $27 | |
| Nebraska | 13.3¢ | $26 | |
| Nevada | 14.3¢ | $28 | |
| New Hampshire | 27.2¢ | $53 | |
| New Jersey | 23.5¢ | $46 | |
| New Mexico | 15.2¢ | $30 | |
| New York | 29.4¢ | $57 | |
| North Carolina | 16.3¢ | $32 | |
| North Dakotacheapest | 12.3¢ | $24 | |
| Ohio | 19.5¢ | $38 | |
| Oklahoma | 13.3¢ | $26 | |
| Oregon | 15.8¢ | $31 | |
| Pennsylvania | 21.5¢ | $42 | |
| Rhode Island | 28.3¢ | $55 | |
| South Carolina | 17.1¢ | $33 | |
| South Dakota | 14.5¢ | $28 | |
| Tennessee | 14.9¢ | $29 | |
| Texas | 17.0¢ | $33 | |
| Utah | 13.3¢ | $26 | |
| Vermont | 24.6¢ | $48 | |
| Virginia | 17.4¢ | $34 | |
| Washington | 14.4¢ | $28 | |
| West Virginia | 16.1¢ | $31 | |
| Wisconsin | 19.2¢ | $37 | |
| Wyoming | 14.7¢ | $29 |
Certified models closest in efficiency
| Model | kWh/yr | $/yr (US avg) |
|---|---|---|
| AIRMEGA AP-1125G | 195 | $37 |
| Coway AP-1125G | 195 | $37 |
| Blueair 3332111100 | 193 | $36 |
| LAGO LAPKJ350GS1BLK | 202 | $38 |
| Midea 793K19A | 202 | $38 |
| Midea KJ350G-S1 | 202 | $38 |
Run your own numbers
Your rate, your numbers
- Per day
- 10¢
- Per month
- $3.06
- Per year
- $37
195 kWh/yr × 18.8¢/kWh = $37/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 Airmega AP-1125G use?
- ENERGY STAR certifies the Coway Airmega 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 Airmega AP-1125G cost to run per month?
- About $3.06 a month at the U.S. average residential rate (18.8¢/kWh) — 10¢ a day, or $37 a year. Your state's rate moves this up or down; see the table above.
- Is the Coway Airmega AP-1125G energy efficient?
- It uses 32% more electricity than the median certified air purifier.
- What does the Coway Airmega AP-1125G cost to run in the cheapest vs. priciest state?
- At current residential rates it costs about $24 a year in North Dakota (12.3¢/kWh) and $91 in Hawaii (46.6¢/kWh).