Who is the Coway - Airmega 400 for?
Strong choice. At 78.3 Mars Score it's in the A-tier (78-87) — the cluster just below the absolute leaders.
Pick this when you want flagship-tier specs without paying for the headline halo of the S-tier. The day-to-day experience is indistinguishable from the very top.
Mars Score is computed from 7 measured specs against the transparent formula for the air purifiers category. No editorial picks, no paid placement.
Pros and cons at a glance
- ▲True HEPA H13+ — supported.
- ▲CADR: 705 m³/h.
No spec lands in the bottom quartile of the category normalization window — this product holds up across the weighted axes.
Pros are specs scoring ≥75% of the category normalization range. Cons are ≤35%. Derived from the Mars Score formula — no hand-curated lists.
At a glance
- CADR
- 705m³/h
- Coverage
- 60m²
- True HEPA H13+
- true
- Min noise
- 22dB
All specifications
Performance
- CADR
- 705 m³/h
- Coverage
- 60 m²
- True HEPA H13+
- true
- Activated carbon
- true
Smart & Noise
- Min noise
- 22 dB
- Air quality sensor
- true
- Smart app
- true
Latest from the lab
All lab reports →Popular comparisons featuring the Coway - Airmega 400
Top 8 closest matchups in the Air Purifiers category. Sorted by Mars Score proximity — these are the fights most worth your time.
vsMars is reader-supported. When you buy through links on our site, we may earn an affiliate commission at no extra cost to you. Learn more.