Dreame AirPursue PM20 moves more air (CADR) and covers a larger room than BLUEAIR Blue Pure 511i Max.
Which purifier has higher CADR?
Dreame AirPursue PM20 has higher CADR (400 vs 174 CFM).
Which purifier is quieter?
BLUEAIR Blue Pure 511i Max is quieter (19 vs 60 dB).
Which purifier covers a larger room?
Dreame AirPursue PM20 fits a larger room (about 620 vs 270 sq ft recommended from CADR).
Which purifier has better smart features?
BLUEAIR Blue Pure 511i Max lists Wi-Fi or app control; Dreame AirPursue PM20 does not.
Which purifier has longer filter life?
BLUEAIR Blue Pure 511i Max lists a replacement interval of 9; Dreame AirPursue PM20 does not.
Bottom line
Dreame AirPursue PM20 moves more air (CADR) and covers a larger room than BLUEAIR Blue Pure 511i Max.
| Metric | Dreame AirPursue PM20 | BLUEAIR Blue Pure 511i Max |
|---|---|---|
| CADR (smoke) | 400 CFM | 174 CFM |
| Recommended room size | 620 sq ft | 270 sq ft |
| Claimed coverage | 7534 sq ft | 465 sq ft |
| Noise | 60 dB | 19 dB |
| Filter type | HEPA-13, carbon, NANO filter, charcoal filter, photocatalyst UV lamp | HEPASilent |
| Filter interval | — | 9 |
| Smart features | None | None |