Blueair Blue Pure 211i Max moves more air (CADR) and covers a larger room than Blueair Blue Pure 211+.
Which purifier has higher CADR?
Blueair Blue Pure 211i Max has higher CADR (435 vs 350 CFM).
Which purifier is quieter?
Blueair Blue Pure 211i Max is quieter (23 vs 31 dB).
Which purifier covers a larger room?
Blueair Blue Pure 211i Max fits a larger room (about 674 vs 543 sq ft recommended from CADR).
Which purifier has better smart features?
Blueair Blue Pure 211i Max lists Wi-Fi or app control; Blueair Blue Pure 211+ does not.
Which purifier has longer filter life?
Filter replacement interval is not published for either model.
Bottom line
Blueair Blue Pure 211i Max moves more air (CADR) and covers a larger room than Blueair Blue Pure 211+.
| Metric | Blueair Blue Pure 211i Max | Blueair Blue Pure 211+ |
|---|---|---|
| CADR (smoke) | 435 CFM | 350 CFM |
| Recommended room size | 674 sq ft | 543 sq ft |
| Claimed coverage | 3235 sq ft | — |
| Noise | 23 dB | 31 dB |
| Filter type | HEPASilent | HEPASilent |
| Filter interval | — | — |
| Smart features | None | None |