Blueair Blue Signature moves more air (CADR) and covers a larger room than Blueair Blue Pure 511.
Which purifier has higher CADR?
Blueair Blue Signature has higher CADR (455 vs 123 CFM).
Which purifier is quieter?
Blueair Blue Signature is quieter (23 vs 24 dB).
Which purifier covers a larger room?
Blueair Blue Signature fits a larger room (about 705 vs 191 sq ft recommended from CADR).
Which purifier has better smart features?
Blueair Blue Signature lists Wi-Fi or app control; Blueair Blue Pure 511 does not.
Which purifier has longer filter life?
Blueair Blue Signature lists 179.99; Blueair Blue Pure 511 lists 6 months. Intervals are as published and are not converted to a single unit.
Bottom line
Blueair Blue Signature moves more air (CADR) and covers a larger room than Blueair Blue Pure 511.
| Metric | Blueair Blue Signature | Blueair Blue Pure 511 |
|---|---|---|
| CADR (smoke) | 455 CFM | 123 CFM |
| Recommended room size | 705 sq ft | 191 sq ft |
| Claimed coverage | 3385 sq ft | 189 sq ft |
| Noise | 23 dB | 24 dB |
| Filter type | HEPASilent | HEPASilent |
| Filter interval | 179.99 | 6 months |
| Smart features | None | None |