Blueair Blue Pure 211i Max moves more air (CADR) and covers a larger room than BLUEAIR Blue Pure 311i Max.
Which purifier has higher CADR?
Blueair Blue Pure 211i Max has higher CADR (435 vs 365 CFM).
Which purifier is quieter?
Both list a minimum of 23 dB.
Which purifier covers a larger room?
Blueair Blue Pure 211i Max fits a larger room (about 674 vs 566 sq ft recommended from CADR).
Which purifier has better smart features?
Both list smart features (None vs None).
Which purifier has longer filter life?
BLUEAIR Blue Pure 311i Max lists a replacement interval of 9 months; Blueair Blue Pure 211i Max does not.
Bottom line
Blueair Blue Pure 211i Max moves more air (CADR) and covers a larger room than BLUEAIR Blue Pure 311i Max.
| Metric | Blueair Blue Pure 211i Max | BLUEAIR Blue Pure 311i Max |
|---|---|---|
| CADR (smoke) | 435 CFM | 365 CFM |
| Recommended room size | 674 sq ft | 566 sq ft |
| Claimed coverage | 3235 sq ft | 2107 sq ft |
| Noise | 23 dB | 23 dB |
| Filter type | HEPASilent | HEPASilent |
| Filter interval | — | 9 months |
| Smart features | None | None |