Blueair Blue Signature and Blueair Blue Pure 211i Max are close on CADR — compare noise, filter interval, and smart features below.
Which purifier has higher CADR?
Blueair Blue Signature has higher CADR (455 vs 435 CFM).
Which purifier is quieter?
Both list a minimum of 23 dB.
Which purifier covers a larger room?
Blueair Blue Signature fits a larger room (about 705 vs 674 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 Signature lists a replacement interval of 179.99; Blueair Blue Pure 211i Max does not.
Bottom line
Blueair Blue Signature and Blueair Blue Pure 211i Max are close on CADR — compare noise, filter interval, and smart features below.
| Metric | Blueair Blue Signature | Blueair Blue Pure 211i Max |
|---|---|---|
| CADR (smoke) | 455 CFM | 435 CFM |
| Recommended room size | 705 sq ft | 674 sq ft |
| Claimed coverage | 3385 sq ft | 3235 sq ft |
| Noise | 23 dB | 23 dB |
| Filter type | HEPASilent | HEPASilent |
| Filter interval | 179.99 | — |
| Smart features | None | None |