BLUEAIR Blue Pure 311i Max moves more air (CADR) and covers a larger room than Alen 45i.
Which purifier has higher CADR?
BLUEAIR Blue Pure 311i Max has higher CADR (365 vs 255 CFM).
Which purifier is quieter?
Both list a minimum of 23 dB.
Which purifier covers a larger room?
BLUEAIR Blue Pure 311i Max fits a larger room (about 566 vs 395 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; Alen 45i does not.
Bottom line
BLUEAIR Blue Pure 311i Max moves more air (CADR) and covers a larger room than Alen 45i.
| Metric | BLUEAIR Blue Pure 311i Max | Alen 45i |
|---|---|---|
| CADR (smoke) | 365 CFM | 255 CFM |
| Recommended room size | 566 sq ft | 395 sq ft |
| Claimed coverage | 2107 sq ft | 1900 sq ft |
| Noise | 23 dB | 23 dB |
| Filter type | HEPASilent | HEPA |
| Filter interval | 9 months | — |
| Smart features | None | None |