Coway Airmega 400S: 7 of 8 decision facts sourced.
Blueair Blue Pure 311i Max: 3 of 8 decision facts sourced. Missing: CADR dust, CADR pollen, Filter cost, Filter life, Noise.
| Coway Airmega 400S | Blueair Blue Pure 311i Max | |
|---|---|---|
| Price today | Price not yet checked | Price not yet checked |
| CADR smoke | 328 cowaymega.com | 250 cubic feet per minute bestbuy.com |
| CADR dust | 328 cowaymega.com | Not yet sourced |
| CADR pollen | 400 cowaymega.com | Not yet sourced |
| Room size | 3,120 ft cowaymega.com | 388 square feet bestbuy.com |
| Filter life | 1 Year cowaymega.com | Not yet sourced |
| Noise | 22~52 dB(A) cowaymega.com | Not yet sourced |
| Starting MSRP | $749.00 cowaymega.com | $229.99 bestbuy.com |
Not yet sourced — Coway Airmega 400S: Filter cost. Blueair Blue Pure 311i Max: CADR dust, CADR pollen, Filter cost, Filter life, Noise. No manufacturer, official or retailer source we read publishes these yet; we don't estimate them.
Verdict: For large rooms, Coway is the clear pick.
Provisional pick: Coway Airmega 400S — not enough sourced decision facts for Blueair Blue Pure 311i Max. We don't rank on specs we can't verify.
| Coway Airmega 400S | Blueair Blue Pure 311I Max | |
|---|---|---|
| CADR smoke | 328 | 250 cubic feet per minute |
| CADR dust | 328 | — |
| CADR pollen | 400 | — |
| Room size | 3,120 ft | 388 square feet |
| Noise | 22~52 dB(A) | — |
| Filter life | 1 Year | — |
Provisional pick: Coway Airmega 400S — not enough sourced decision facts for Blueair Blue Pure 311i Max.
The Winix 5500-2 has a 360 sq ft CADR rating and costs around $150, while the Coway Airmega 400S covers 1,560 sq ft with a 2.1 CADR and sells for about $500. The Winix is the better value for small rooms; the Coway is superior for large spaces with its higher capacity and app control.
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