Blueair Blue Pure 211i Max moves more air (CADR) and covers a larger room than Alen 45i.
Which purifier has higher CADR?
Blueair Blue Pure 211i Max has higher CADR (435 vs 255 CFM).
Which purifier is quieter?
Both list a minimum of 23 dB.
Which purifier covers a larger room?
Blueair Blue Pure 211i Max fits a larger room (about 674 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?
Filter replacement interval is not published for either model.
Bottom line
Blueair Blue Pure 211i Max moves more air (CADR) and covers a larger room than Alen 45i.
| Metric | Blueair Blue Pure 211i Max | Alen 45i |
|---|---|---|
| CADR (smoke) | 435 CFM | 255 CFM |
| Recommended room size | 674 sq ft | 395 sq ft |
| Claimed coverage | 3235 sq ft | 1900 sq ft |
| Noise | 23 dB | 23 dB |
| Filter type | HEPASilent | HEPA |
| Filter interval | — | — |
| Smart features | None | None |