Who is the Coway - Airmega 400 for?
Strong choice. At 85.4 Mars Score it sits 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 S-tier halo. The day-to-day experience is hard to tell apart 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.
Coway - Airmega 400: advantages & disadvantages
Measured against every air purifiers we track, here is where the Coway - Airmega 400 pulls ahead.
- ▲Includes True HEPA H13+ — a feature not every air purifiers offers.
- ▲Min noise: 22 dB — well above the typical air purifiers.
- ▲CADR: 705 m³/h — well above the typical air purifiers.
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
Hands-on coverage
Editorial pieces from the vsMars team that cover the Coway - Airmega 400.
Latest from the lab
All lab reports →Popular comparisons featuring the Coway - Airmega 400
The 12 closest matchups in the Air Purifiers category, sorted by Mars Score proximity — the fights most worth your time.
How Coway - Airmega 400 fits the Air Purifiers field
Coway - Airmega 400 is listed in the Air Purifiers catalog with a Mars Score of 85.4. It currently ranks 3 of 17 products in this category by Mars Score.This page is most useful when you match the product's strongest measurable specifications to your own workload instead of treating one number as a universal recommendation.
Key specifications to check
- CADR
- 705 m³/h
- Coverage
- 60 m²
- True HEPA H13+
- Yes
- Min noise
- 22 dB
Values are shown exactly as stored in the current catalog. A dash means the value is not available; it is not a zero and is not treated as a win or loss.
Who should consider it?
Start with the priorities represented by cadr, coverage, true hepa h13+. Buyers who value those dimensions should compare this product against the closest same-category alternatives below, then verify regional pricing, warranty, and configuration before purchase.
Closest alternatives
Frequently asked
What is the Mars Score for Coway - Airmega 400?+
Coway - Airmega 400 scores 85.4 on the transparent Mars Score formula for air purifiers, computed from its published specs against the category's weighted normalization.
What category does Coway - Airmega 400 belong to?+
Coway - Airmega 400 is a Coway air purifier catalogued in the Air Purifiers category.
When was Coway - Airmega 400 released?+
Coway - Airmega 400 was released on 2018-09-04.
What is the cadr of Coway - Airmega 400?+
Coway - Airmega 400 has a cadr of 705 m³/h.
What is the coverage of Coway - Airmega 400?+
Coway - Airmega 400 has a coverage of 60 m².
What is the true hepa h13+ of Coway - Airmega 400?+
Coway - Airmega 400 has a true hepa h13+ of true.