Coway Airmega 400 Review
High-capacity dual-filter purifier with excellent room coverage and smart indicators.
Updated 2026-03-09
Independently reviewed
Overview
The Coway Airmega 400 delivers exceptional performance for large spaces with its dual filtration system and Green True HEPA filter. It covers up to 1,560 sq ft and features an intuitive indicator that shows when filters need replacement. Build quality and efficiency make it a standout value in the premium segment.
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Price Drop Alert — View Deal NowPros & Cons
Pros
- ✓Covers up to 1,560 sq ft
- ✓Dual filtration with Green True HEPA
- ✓Filter replacement indicator
- ✓Energy-efficient operation
- ✓Quiet on low and medium settings
- ✓Sleek, compact design
- ✓5-year warranty
Cons
- ✗No smart connectivity
- ✗Filter costs add up over time
- ✗Heavier than some competitors
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Price Drop Alert — View Deal NowSpecifications
| Room Coverage | Up to 1,560 sq ft |
| CADR | 361 (smoke), 377 (dust), 403 (pollen) |
| Filter Type | Green True HEPA + activated carbon |
| Filter Life | 12 months |
| Annual Filter Cost | ~$70 |
| Noise Level | 24–52 dB |
| Smart Features | None |
| Air Quality Sensor | Yes (particle indicator) |
| Weight | 18.7 lbs |
| Energy Star | Yes |
Our Verdict
Our top value pick for large rooms. Outstanding CADR, reliable filtration, and solid build at a price that undercuts premium competitors.
9.2
/ 10
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