Coway Airmega 400S
A dual-intake powerhouse that covers huge rooms with deep carbon and a slick smart app.
At a glance
Pros
- + Massive rated coverage up to 115 m²
- + Dual-suction intake for fast cleaning
- + Deep activated-carbon deodorization
- + Quiet auto mode with light sensor
Cons
- − Expensive replacement filters
- − Heavy and large
Our verdict
The Coway Airmega 400S is a premium large-room cleaner with deep carbon filtration and smart automation. Its high filter costs are the main trade-off for the big coverage.
Full specs
| CADR | 350 CFM |
|---|---|
| Coverage | 115 m² |
| Noise (low) | 22 dB |
| Noise (high) | 52 dB |
| True HEPA | Yes |
| Activated carbon | Yes |
| Smart app | Yes |
| Voice control | Yes |
| Filter cost / yr | 110 USD |
| Dimensions | 35 × 35 × 57 cm |
| Weight | 11.4 kg |
Compare to similar models
Other air purifiers that match Coway Airmega 400S's strengths.
Alen BreatheSmart 75i
A large-room smart purifier with swappable HEPA filters and laser-driven auto air-quality control.
Blueair Blue Pure 211i Max
A high-CADR HEPASilent purifier that clears large rooms fast while staying impressively quiet.
Levoit Core 600S
A large-room workhorse that scrubs big spaces fast while staying quiet and app-smart.
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