BLUEAIR Blue Pure 311i Max moves more air (CADR) and covers a larger room than BLUEAIR Blue Signature Small.
Which purifier has higher CADR?
BLUEAIR Blue Pure 311i Max has higher CADR (365 vs 160 CFM).
Which purifier is quieter?
BLUEAIR Blue Pure 311i Max is quieter (23 vs 50 dB).
Which purifier covers a larger room?
BLUEAIR Blue Pure 311i Max fits a larger room (about 566 vs 248 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 Pure 311i Max lists a replacement interval of 9 months; BLUEAIR Blue Signature Small does not.
Bottom line
BLUEAIR Blue Pure 311i Max moves more air (CADR) and covers a larger room than BLUEAIR Blue Signature Small.
| Metric | BLUEAIR Blue Pure 311i Max | BLUEAIR Blue Signature Small |
|---|---|---|
| CADR (smoke) | 365 CFM | 160 CFM |
| Recommended room size | 566 sq ft | 248 sq ft |
| Claimed coverage | 2107 sq ft | 248 sq ft |
| Noise | 23 dB | 50 dB |
| Filter type | HEPASilent | HEPASilent |
| Filter interval | 9 months | — |
| Smart features | None | None |
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