Blueair Blue Pure 211+ moves more air (CADR) and covers a larger room than BLUEAIR Blue Signature SP3i.
Which purifier has higher CADR?
Blueair Blue Pure 211+ has higher CADR (350 vs 321 CFM).
Which purifier is quieter?
Blueair Blue Pure 211+ is quieter (31 vs 54 dB).
Which purifier covers a larger room?
Blueair Blue Pure 211+ fits a larger room (about 543 vs 498 sq ft recommended from CADR).
Which purifier has better smart features?
BLUEAIR Blue Signature SP3i lists Wi-Fi or app control; Blueair Blue Pure 211+ does not.
Which purifier has longer filter life?
BLUEAIR Blue Signature SP3i lists a replacement interval of 1; Blueair Blue Pure 211+ does not.
Bottom line
Blueair Blue Pure 211+ moves more air (CADR) and covers a larger room than BLUEAIR Blue Signature SP3i.
| Metric | Blueair Blue Pure 211+ | BLUEAIR Blue Signature SP3i |
|---|---|---|
| CADR (smoke) | 350 CFM | 321 CFM |
| Recommended room size | 543 sq ft | 498 sq ft |
| Claimed coverage | — | 2250 sq ft |
| Noise | 31 dB | 54 dB |
| Filter type | HEPASilent | HEPASilent |
| Filter interval | — | 1 |
| Smart features | None | None |
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