Longstar EP-KJTS01-140-25W running cost
$26.37/year
The Longstar EP-KJTS01-140-25W is rated at 144 kWh per year (ENERGY STAR test conditions). At the US average residential price of 18.3¢/kWh (July 2026), that is about $26.37 a year, or $2.20 a month.
How it compares
Among 88 certified medium-room (200-400 sq ft) air purifiers (same size band), it ranks #36 for lowest running cost (class median $27.19/year). Recommended room size (sq ft): 229.
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) | 148.0 |
|---|---|
| Dust CADR (cfm) | 159.0 |
| Pollen CADR (cfm) | 174.0 |
| PM2.5 CADR (cfm) | 154.0 |
| Ozone emissions (ppb) | 0.00 |
| Filter type | HEPA-Type |
| Smart / connected | No |
| On market since | 2026-06-01 |
| Annual energy use | 144 kWh |
Source: ENERGY STAR certified air purifiers dataset, record 4654774. Real-world use depends on hours of operation, settings and climate.
Cost to run in every state
| State | Price | Per year |
|---|---|---|
| Louisiana | 12.7¢ | $18.32 |
| Nevada | 12.8¢ | $18.39 |
| Utah | 13.1¢ | $18.89 |
| North Dakota | 13.4¢ | $19.31 |
| Tennessee | 13.7¢ | $19.74 |
| Idaho | 13.7¢ | $19.77 |
| Nebraska | 13.8¢ | $19.84 |
| Kentucky | 13.8¢ | $19.89 |
| Arkansas | 14.3¢ | $20.64 |
| Oklahoma | 14.3¢ | $20.66 |
| Wyoming | 14.4¢ | $20.68 |
| Mississippi | 14.5¢ | $20.94 |
| Washington | 14.7¢ | $21.18 |
| Montana | 15.0¢ | $21.59 |
| Florida | 15.0¢ | $21.64 |
| North Carolina | 15.2¢ | $21.83 |
| Kansas | 15.3¢ | $21.99 |
| South Dakota | 15.4¢ | $22.13 |
| Arizona | 15.4¢ | $22.15 |
| South Carolina | 15.5¢ | $22.28 |
| West Virginia | 15.8¢ | $22.72 |
| Texas | 15.9¢ | $22.87 |
| Oregon | 16.0¢ | $23.00 |
| Iowa | 16.0¢ | $23.03 |
| Missouri | 16.1¢ | $23.17 |
| New Mexico | 16.1¢ | $23.17 |
| Georgia | 16.3¢ | $23.43 |
| Alabama | 16.4¢ | $23.62 |
| Indiana | 16.7¢ | $24.09 |
| Colorado | 17.0¢ | $24.48 |
| Minnesota | 17.4¢ | $25.13 |
| Virginia | 17.6¢ | $25.27 |
| Delaware | 18.5¢ | $26.61 |
| Wisconsin | 19.1¢ | $27.45 |
| Illinois | 19.2¢ | $27.68 |
| Ohio | 19.4¢ | $28.01 |
| Maryland | 21.4¢ | $30.83 |
| Pennsylvania | 21.7¢ | $31.28 |
| Michigan | 23.1¢ | $33.19 |
| Vermont | 23.8¢ | $34.20 |
| Connecticut | 24.2¢ | $34.79 |
| New Jersey | 25.2¢ | $36.27 |
| District of Columbia | 25.2¢ | $36.30 |
| New Hampshire | 26.6¢ | $38.30 |
| Rhode Island | 28.3¢ | $40.74 |
| Alaska | 28.8¢ | $41.52 |
| New York | 29.9¢ | $43.06 |
| Massachusetts | 30.5¢ | $43.91 |
| Maine | 32.4¢ | $46.67 |
| California | 33.6¢ | $48.40 |
| Hawaii | 48.0¢ | $69.12 |