Levoit Core 400S vs Coway Airmega 400
Bottom line
For most large rooms, the Levoit 400S is the better value. The Airmega 400 has more raw output, but its big coverage claim leans on a low air-change rate (fewer full air turnovers per hour), and you pay more to keep its filters fresh.
If you have a large room to clean, start with how each one's coverage claim is measured, because that is where these diverge. The Levoit 400S covers a genuinely large room without costing much to run. The Airmega 400 moves far more air, but its headline 1,560 sq ft figure is rated at a gentle air-change rate - meaning it cycles the room's air fewer times an hour, so that big number flatters it - and its filters cost more to replace.
| 259 cfm (AHAM-verified) | CADR (independently verified?) | 400 cfm (AHAM-verified) |
| 7.0 | Verified Performance30% | 3.0 |
| 6.0 | Total Cost of Ownership25% | 1.0 |
| 5.0 | Certification15% | 3.0 |
| 8.0 | Safety15% | 8.0 |
| 10.0 | Practical Fit15% | 8.0 |
FAQ
- Is the Levoit Core 400S better than the Coway Airmega 400?
- In our scoring the Levoit Core 400S rates 7.1/10 and the Coway Airmega 400 4.0/10. For most large rooms, the Levoit 400S is the better value. The Airmega 400 has more raw output, but its big coverage claim leans on a low air-change rate (fewer full air turnovers per hour), and you pay more to keep its filters fresh.
- Does the Airmega 400 really cover 1,560 sq ft?
- It depends how thoroughly you want the air cleaned. At about 2 air changes per hour - a gentle once-over - yes. But at 4.8 air changes per hour, the brisker turnover we hold purifiers to, its verified airflow only covers a much smaller room. We flag that gap on its scorecard so you are not sizing your room to the optimistic number.