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Air purifiers ยท Coway
Coway AP-3018B air purifier
Rated for rooms up to 640 sq ft. Puts out 413 cfm of smoke-free air per minute.
Where it ranks
#4 in Best air purifiers rated most efficient65 models compared#4 in Best air purifiers for allergies206 models compared#1 in Best air purifiers for allergies with an air quality sensor72 models compared#6 in Best low-energy air purifiers for rooms over 500 sq ft35 models compared#2 in Best low-energy air purifiers for rooms over 500 sq ft with an air quality sensor21 models compared
Full specs
Cleaning power
| Room size it is rated forThe largest room it cleans well in the certification test. | 640 sq ft | |
| Clean air per minute: smokeHow much smoke-free air it puts out each minute. Higher cleans faster. | 413 cfm | |
| Clean air per minute: dustThe same test for dust. | 433 cfm | |
| Clean air per minute: pollenThe same test for pollen. Matters most for allergies. | 450 cfm |
Running cost
| Electricity per yearMeasured use when running all year. Multiply by your power price. | 235 kWh | |
| Among the most efficient of 2025 | Yes |
Filters
| Main filter | HEPA |
Safety
| Ozone it gives offOzone irritates lungs. 0 means none was measured. | 0 ppb |
Features
| Automatic modeAn air quality sensor adjusts the speed on its own. | Air Quality Sensor,Timer | |
| App control | No |
Source: this model on the ENERGY STAR list, checked 2026-11-09. Model number AP-3018B.