Choose Dreame AirPursue PM20 for higher CADR and larger-room coverage. Choose Blueair Blue Pure 311i Max if you want lower noise and Wi-Fi or app control.
Which purifier has higher CADR?
The Dreame AirPursue PM20 has a smoke CADR of 400 CFM versus 365 CFM for the Blueair Blue Pure 311i Max, a difference of 10%.
Which purifier is quieter?
Blueair Blue Pure 311i Max is quieter (23 vs 60 dB).
Which purifier covers a larger room?
Dreame AirPursue PM20 fits a larger room (about 620 vs 566 sq ft recommended from CADR).
Which purifier has better smart features?
Blueair Blue Pure 311i Max lists Wi-Fi or app control; Dreame AirPursue PM20 does not.
Which purifier has better filtration?
Dreame AirPursue PM20 lists HEPA-13, carbon, NANO filter, charcoal filter, photocatalyst UV lamp; Blueair Blue Pure 311i Max lists HEPASilent.
Bottom line
Choose Dreame AirPursue PM20 for higher CADR and larger-room coverage. Choose Blueair Blue Pure 311i Max if you want lower noise and Wi-Fi or app control.
| Metric | Dreame AirPursue PM20 | Blueair Blue Pure 311i Max | Difference / Winner |
|---|---|---|---|
| Smoke CADR | 400 CFM | 365 CFM | Dreame AirPursue PM20 (+10%) |
| Recommended room size | 620 sq ft | 566 sq ft | Dreame AirPursue PM20 (+10%) |
| Manufacturer claimed coverage | 7534 sq ft | 2107 sq ft | — |
| Minimum noise | 60 dB | 23 dB | Blueair Blue Pure 311i Max |
| Filter type | HEPA-13, carbon, NANO filter, charcoal filter, photocatalyst UV lamp | HEPASilent | — |
| Replacement interval | — | 9 months | — |
| Power | — | 32 W | — |
| Wi-Fi / app | No | Yes | — |
| Dimensions | 14.9 × 14.9 × 33.4 in | 19 × 12.5 × 12.5 in | — |
| Weight | — | 7.8 lb | — |