Winix AT40 running cost
$49.81/year
The Winix AT40 is rated at 272 kWh per year (ENERGY STAR test conditions). At the US average residential price of 18.3¢/kWh (July 2026), that is about $49.81 a year, or $4.15 a month.
How it compares
Among 77 certified large-room (400+ sq ft) air purifiers (same size band), it ranks #23 for lowest running cost (class median $55.66/year). Recommended room size (sq ft): 411.
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) | 265.0 |
|---|---|
| Dust CADR (cfm) | 259.0 |
| Pollen CADR (cfm) | 244.0 |
| PM2.5 CADR (cfm) | 261.0 |
| Ozone emissions (ppb) | 0.00 |
| Filter type | HEPA-Type |
| Smart / connected | Yes |
| On market since | 2026-05-29 |
| Annual energy use | 272 kWh |
Source: ENERGY STAR certified air purifiers dataset, record 4618154. Real-world use depends on hours of operation, settings and climate.
Cost to run in every state
| State | Price | Per year |
|---|---|---|
| Louisiana | 12.7¢ | $34.60 |
| Nevada | 12.8¢ | $34.74 |
| Utah | 13.1¢ | $35.69 |
| North Dakota | 13.4¢ | $36.48 |
| Tennessee | 13.7¢ | $37.29 |
| Idaho | 13.7¢ | $37.35 |
| Nebraska | 13.8¢ | $37.48 |
| Kentucky | 13.8¢ | $37.57 |
| Arkansas | 14.3¢ | $38.98 |
| Oklahoma | 14.3¢ | $39.03 |
| Wyoming | 14.4¢ | $39.06 |
| Mississippi | 14.5¢ | $39.55 |
| Washington | 14.7¢ | $40.01 |
| Montana | 15.0¢ | $40.78 |
| Florida | 15.0¢ | $40.88 |
| North Carolina | 15.2¢ | $41.24 |
| Kansas | 15.3¢ | $41.54 |
| South Dakota | 15.4¢ | $41.81 |
| Arizona | 15.4¢ | $41.84 |
| South Carolina | 15.5¢ | $42.08 |
| West Virginia | 15.8¢ | $42.92 |
| Texas | 15.9¢ | $43.20 |
| Oregon | 16.0¢ | $43.44 |
| Iowa | 16.0¢ | $43.50 |
| Missouri | 16.1¢ | $43.77 |
| New Mexico | 16.1¢ | $43.77 |
| Georgia | 16.3¢ | $44.26 |
| Alabama | 16.4¢ | $44.61 |
| Indiana | 16.7¢ | $45.51 |
| Colorado | 17.0¢ | $46.24 |
| Minnesota | 17.4¢ | $47.47 |
| Virginia | 17.6¢ | $47.74 |
| Delaware | 18.5¢ | $50.27 |
| Wisconsin | 19.1¢ | $51.85 |
| Illinois | 19.2¢ | $52.28 |
| Ohio | 19.4¢ | $52.91 |
| Maryland | 21.4¢ | $58.24 |
| Pennsylvania | 21.7¢ | $59.08 |
| Michigan | 23.1¢ | $62.70 |
| Vermont | 23.8¢ | $64.60 |
| Connecticut | 24.2¢ | $65.72 |
| New Jersey | 25.2¢ | $68.52 |
| District of Columbia | 25.2¢ | $68.58 |
| New Hampshire | 26.6¢ | $72.36 |
| Rhode Island | 28.3¢ | $76.95 |
| Alaska | 28.8¢ | $78.42 |
| New York | 29.9¢ | $81.33 |
| Massachusetts | 30.5¢ | $82.94 |
| Maine | 32.4¢ | $88.16 |
| California | 33.6¢ | $91.43 |
| Hawaii | 48.0¢ | $130.57 |