BLUEAIR Blue Pure 311i Max moves more air (CADR) and covers a larger room than Blueair Blue Pure 511.
Which purifier has higher CADR?
BLUEAIR Blue Pure 311i Max has higher CADR (365 vs 123 CFM).
Which purifier is quieter?
BLUEAIR Blue Pure 311i Max is quieter (23 vs 24 dB).
Which purifier covers a larger room?
BLUEAIR Blue Pure 311i Max fits a larger room (about 566 vs 191 sq ft recommended from CADR).
Which purifier has better smart features?
BLUEAIR Blue Pure 311i Max lists Wi-Fi or app control; Blueair Blue Pure 511 does not.
Which purifier has longer filter life?
BLUEAIR Blue Pure 311i Max lists 9 months; Blueair Blue Pure 511 lists 6 months. Intervals are as published and are not converted to a single unit.
Bottom line
BLUEAIR Blue Pure 311i Max moves more air (CADR) and covers a larger room than Blueair Blue Pure 511.
| Metric | BLUEAIR Blue Pure 311i Max | Blueair Blue Pure 511 |
|---|---|---|
| CADR (smoke) | 365 CFM | 123 CFM |
| Recommended room size | 566 sq ft | 191 sq ft |
| Claimed coverage | 2107 sq ft | 189 sq ft |
| Noise | 23 dB | 24 dB |
| Filter type | HEPASilent | HEPASilent |
| Filter interval | 9 months | 6 months |
| Smart features | None | None |