SIESEAN AP-400 running cost
$44.49/year
The SIESEAN AP-400 is rated at 243 kWh per year (ENERGY STAR test conditions). At the US average residential price of 18.3¢/kWh (July 2026), that is about $44.49 a year, or $3.71 a month.
How it compares
Among 88 certified medium-room (200-400 sq ft) air purifiers (same size band), it ranks #87 for lowest running cost (class median $27.19/year). Recommended room size (sq ft): 357.
Cheaper-to-run air purifiers in the same size band
- MegaLight AP-HCE99-WT — 89 kWh/yr, $16.30/yr
- Rainbow Luggable Ultra — 93 kWh/yr, $17.03/yr
- AROEVE DH-JH021US-A00 — 101 kWh/yr, $18.49/yr
- Blueair 3132111100 — 103 kWh/yr, $18.91/yr
- Blueair 3232111101 — 108 kWh/yr, $19.77/yr
Specifications
| Smoke CADR (cfm) | 230.0 |
|---|---|
| Dust CADR (cfm) | 239.0 |
| Pollen CADR (cfm) | 242.0 |
| PM2.5 CADR (cfm) | 235.0 |
| Ozone emissions (ppb) | 0.00 |
| Filter type | HEPA-Type |
| Smart / connected | No |
| On market since | 2025-09-17 |
| Annual energy use | 243 kWh |
Source: ENERGY STAR certified air purifiers dataset, record 4509936. Real-world use depends on hours of operation, settings and climate.
Cost to run in every state
| State | Price | Per year |
|---|---|---|
| Louisiana | 12.7¢ | $30.91 |
| Nevada | 12.8¢ | $31.03 |
| Utah | 13.1¢ | $31.88 |
| North Dakota | 13.4¢ | $32.59 |
| Tennessee | 13.7¢ | $33.32 |
| Idaho | 13.7¢ | $33.36 |
| Nebraska | 13.8¢ | $33.49 |
| Kentucky | 13.8¢ | $33.56 |
| Arkansas | 14.3¢ | $34.82 |
| Oklahoma | 14.3¢ | $34.87 |
| Wyoming | 14.4¢ | $34.89 |
| Mississippi | 14.5¢ | $35.33 |
| Washington | 14.7¢ | $35.75 |
| Montana | 15.0¢ | $36.43 |
| Florida | 15.0¢ | $36.52 |
| North Carolina | 15.2¢ | $36.84 |
| Kansas | 15.3¢ | $37.11 |
| South Dakota | 15.4¢ | $37.35 |
| Arizona | 15.4¢ | $37.37 |
| South Carolina | 15.5¢ | $37.59 |
| West Virginia | 15.8¢ | $38.35 |
| Texas | 15.9¢ | $38.59 |
| Oregon | 16.0¢ | $38.81 |
| Iowa | 16.0¢ | $38.86 |
| Missouri | 16.1¢ | $39.10 |
| New Mexico | 16.1¢ | $39.10 |
| Georgia | 16.3¢ | $39.54 |
| Alabama | 16.4¢ | $39.85 |
| Indiana | 16.7¢ | $40.65 |
| Colorado | 17.0¢ | $41.31 |
| Minnesota | 17.4¢ | $42.40 |
| Virginia | 17.6¢ | $42.65 |
| Delaware | 18.5¢ | $44.91 |
| Wisconsin | 19.1¢ | $46.32 |
| Illinois | 19.2¢ | $46.70 |
| Ohio | 19.4¢ | $47.26 |
| Maryland | 21.4¢ | $52.03 |
| Pennsylvania | 21.7¢ | $52.78 |
| Michigan | 23.1¢ | $56.01 |
| Vermont | 23.8¢ | $57.71 |
| Connecticut | 24.2¢ | $58.71 |
| New Jersey | 25.2¢ | $61.21 |
| District of Columbia | 25.2¢ | $61.26 |
| New Hampshire | 26.6¢ | $64.64 |
| Rhode Island | 28.3¢ | $68.74 |
| Alaska | 28.8¢ | $70.06 |
| New York | 29.9¢ | $72.66 |
| Massachusetts | 30.5¢ | $74.09 |
| Maine | 32.4¢ | $78.76 |
| California | 33.6¢ | $81.67 |
| Hawaii | 48.0¢ | $116.64 |