Data through April 2026
Running cost · Air Purifiers · ENERGY STAR certified
SIESEAN AP-400
The SIESEAN AP-400's certified consumption is 243 kWh per year, which prices out to about $46 at the national average rate — your hours of use scale that directly. That's close to the middle of the certified pack — about 64% above the median air purifier, ranked 157 of 214. The same unit costs $30 a year in North Dakota but $113 in Hawaii — electricity rates, not the appliance, make the difference. 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
$46/yr
- Per month
- $3.81
- Per day
- 13¢
- Certified use
- 243 kWh/yr
- Rated room size
- 357 sq ft
- CADR (smoke)
- 230
- Technology
- Fan and Filter
- Efficiency
- 5.6 CFM/W
What it costs in every state
| State | Rate ¢/kWh | This model $/yr | Relative cost |
|---|---|---|---|
| Alabama | 17.4¢ | $42 | |
| Alaska | 27.4¢ | $66 | |
| Arizona | 15.5¢ | $38 | |
| Arkansas | 14.2¢ | $34 | |
| California | 35.3¢ | $86 | |
| Colorado | 16.5¢ | $40 | |
| Connecticut | 32.2¢ | $78 | |
| Delaware | 18.8¢ | $46 | |
| District of Columbia | 25.4¢ | $62 | |
| Florida | 15.4¢ | $37 | |
| Georgia | 15.4¢ | $37 | |
| Hawaiipriciest | 46.6¢ | $113 | |
| Idaho | 12.7¢ | $31 | |
| Illinois | 20.5¢ | $50 | |
| Indiana | 17.9¢ | $43 | |
| Iowa | 13.9¢ | $34 | |
| Kansas | 15.8¢ | $38 | |
| Kentucky | 15.0¢ | $36 | |
| Louisiana | 14.4¢ | $35 | |
| Maine | 28.4¢ | $69 | |
| Maryland | 22.1¢ | $54 | |
| Massachusetts | 29.4¢ | $72 | |
| Michigan | 21.4¢ | $52 | |
| Minnesota | 16.4¢ | $40 | |
| Mississippi | 16.8¢ | $41 | |
| Missouri | 14.0¢ | $34 | |
| Montana | 13.9¢ | $34 | |
| Nebraska | 13.3¢ | $32 | |
| Nevada | 14.3¢ | $35 | |
| New Hampshire | 27.2¢ | $66 | |
| New Jersey | 23.5¢ | $57 | |
| New Mexico | 15.2¢ | $37 | |
| New York | 29.4¢ | $72 | |
| North Carolina | 16.3¢ | $39 | |
| North Dakotacheapest | 12.3¢ | $30 | |
| Ohio | 19.5¢ | $47 | |
| Oklahoma | 13.3¢ | $32 | |
| Oregon | 15.8¢ | $38 | |
| Pennsylvania | 21.5¢ | $52 | |
| Rhode Island | 28.3¢ | $69 | |
| South Carolina | 17.1¢ | $41 | |
| South Dakota | 14.5¢ | $35 | |
| Tennessee | 14.9¢ | $36 | |
| Texas | 17.0¢ | $41 | |
| Utah | 13.3¢ | $32 | |
| Vermont | 24.6¢ | $60 | |
| Virginia | 17.4¢ | $42 | |
| Washington | 14.4¢ | $35 | |
| West Virginia | 16.1¢ | $39 | |
| Wisconsin | 19.2¢ | $47 | |
| Wyoming | 14.7¢ | $36 |
Certified models closest in efficiency
| Model | kWh/yr | $/yr (US avg) |
|---|---|---|
| Amazon Basics AP5110-UL | 240 | $45 |
| LEVOIT Core 400S | 237 | $45 |
| Blueair 4312111000most efficient | 235 | $44 |
| Coway AP-3018Bmost efficient | 235 | $44 |
| LEVOIT LAP-C401S-WUSR | 235 | $44 |
| MEDIFY AIR MA-50-V3.0 | 252 | $47 |
Run your own numbers
Your rate, your numbers
- Per day
- 13¢
- Per month
- $3.81
- Per year
- $46
243 kWh/yr × 18.8¢/kWh = $46/yr
Prefilled with this model's certified 243 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 SIESEAN AP-400 use?
- ENERGY STAR certifies the SIESEAN AP-400 at 243 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 SIESEAN AP-400 cost to run per month?
- About $3.81 a month at the U.S. average residential rate (18.8¢/kWh) — 13¢ a day, or $46 a year. Your state's rate moves this up or down; see the table above.
- Is the SIESEAN AP-400 energy efficient?
- It uses 64% more electricity than the median certified air purifier.
- What does the SIESEAN AP-400 cost to run in the cheapest vs. priciest state?
- At current residential rates it costs about $30 a year in North Dakota (12.3¢/kWh) and $113 in Hawaii (46.6¢/kWh).