Coway AP-3018B running cost
$43.03/year
The Coway AP-3018B is rated at 235 kWh per year (ENERGY STAR test conditions). At the US average residential price of 18.3¢/kWh (July 2026), that is about $43.03 a year, or $3.59 a month.
How it compares
Among 77 certified large-room (400+ sq ft) air purifiers (same size band), it ranks #13 for lowest running cost (class median $55.66/year). Recommended room size (sq ft): 640.
Cheaper-to-run air purifiers in the same size band
- Rainbow Luggable XXL — 75 kWh/yr, $13.73/yr
- Rainbow Luggable XL Ultra — 81 kWh/yr, $14.83/yr
- Rainbow Brisk Box Ultra — 94 kWh/yr, $17.21/yr
- Blueair 4412311000 — 181 kWh/yr, $33.14/yr
- Blueair 3332111100 — 193 kWh/yr, $35.34/yr
Specifications
| Smoke CADR (cfm) | 413.0 |
|---|---|
| Dust CADR (cfm) | 433.0 |
| Pollen CADR (cfm) | 450.0 |
| PM2.5 CADR (cfm) | 423.0 |
| Ozone emissions (ppb) | 0.00 |
| Filter type | HEPA |
| Smart / connected | No |
| On market since | 2019-08-19 |
| Annual energy use | 235 kWh |
Source: ENERGY STAR certified air purifiers dataset, record 4481456. Real-world use depends on hours of operation, settings and climate.
Cost to run in every state
| State | Price | Per year |
|---|---|---|
| Louisiana | 12.7¢ | $29.89 |
| Nevada | 12.8¢ | $30.01 |
| Utah | 13.1¢ | $30.83 |
| North Dakota | 13.4¢ | $31.51 |
| Tennessee | 13.7¢ | $32.22 |
| Idaho | 13.7¢ | $32.27 |
| Nebraska | 13.8¢ | $32.38 |
| Kentucky | 13.8¢ | $32.45 |
| Arkansas | 14.3¢ | $33.68 |
| Oklahoma | 14.3¢ | $33.72 |
| Wyoming | 14.4¢ | $33.75 |
| Mississippi | 14.5¢ | $34.17 |
| Washington | 14.7¢ | $34.57 |
| Montana | 15.0¢ | $35.23 |
| Florida | 15.0¢ | $35.32 |
| North Carolina | 15.2¢ | $35.63 |
| Kansas | 15.3¢ | $35.88 |
| South Dakota | 15.4¢ | $36.12 |
| Arizona | 15.4¢ | $36.14 |
| South Carolina | 15.5¢ | $36.35 |
| West Virginia | 15.8¢ | $37.08 |
| Texas | 15.9¢ | $37.32 |
| Oregon | 16.0¢ | $37.53 |
| Iowa | 16.0¢ | $37.58 |
| Missouri | 16.1¢ | $37.81 |
| New Mexico | 16.1¢ | $37.81 |
| Georgia | 16.3¢ | $38.23 |
| Alabama | 16.4¢ | $38.54 |
| Indiana | 16.7¢ | $39.32 |
| Colorado | 17.0¢ | $39.95 |
| Minnesota | 17.4¢ | $41.01 |
| Virginia | 17.6¢ | $41.24 |
| Delaware | 18.5¢ | $43.43 |
| Wisconsin | 19.1¢ | $44.79 |
| Illinois | 19.2¢ | $45.17 |
| Ohio | 19.4¢ | $45.71 |
| Maryland | 21.4¢ | $50.31 |
| Pennsylvania | 21.7¢ | $51.04 |
| Michigan | 23.1¢ | $54.17 |
| Vermont | 23.8¢ | $55.81 |
| Connecticut | 24.2¢ | $56.78 |
| New Jersey | 25.2¢ | $59.20 |
| District of Columbia | 25.2¢ | $59.24 |
| New Hampshire | 26.6¢ | $62.51 |
| Rhode Island | 28.3¢ | $66.48 |
| Alaska | 28.8¢ | $67.75 |
| New York | 29.9¢ | $70.27 |
| Massachusetts | 30.5¢ | $71.65 |
| Maine | 32.4¢ | $76.16 |
| California | 33.6¢ | $78.98 |
| Hawaii | 48.0¢ | $112.80 |