Choose Dreame AirPursue PM20 for higher CADR and larger-room coverage. Choose Blueair Blue Pure 211+ if you want lower noise.
Which purifier has higher CADR?
The Dreame AirPursue PM20 has a smoke CADR of 400 CFM versus 350 CFM for the Blueair Blue Pure 211+, a difference of 14%.
Which purifier is quieter?
Blueair Blue Pure 211+ is quieter (31 vs 60 dB).
Which purifier covers a larger room?
Dreame AirPursue PM20 fits a larger room (about 620 vs 543 sq ft recommended from CADR).
Which purifier has better smart features?
Neither lists Wi-Fi or app control in our sources.
Which purifier has better filtration?
Dreame AirPursue PM20 lists HEPA-13, carbon, NANO filter, charcoal filter, photocatalyst UV lamp; Blueair Blue Pure 211+ lists HEPASilent.
Bottom line
Choose Dreame AirPursue PM20 for higher CADR and larger-room coverage. Choose Blueair Blue Pure 211+ if you want lower noise.
| Metric | Dreame AirPursue PM20 | Blueair Blue Pure 211+ | Difference / Winner |
|---|---|---|---|
| Smoke CADR | 400 CFM | 350 CFM | Dreame AirPursue PM20 (+14%) |
| Recommended room size | 620 sq ft | 543 sq ft | Dreame AirPursue PM20 (+14%) |
| Manufacturer claimed coverage | 7534 sq ft | — | — |
| Minimum noise | 60 dB | 31 dB | Blueair Blue Pure 211+ |
| Filter type | HEPA-13, carbon, NANO filter, charcoal filter, photocatalyst UV lamp | HEPASilent | — |
| Wi-Fi / app | No | No | — |
| Dimensions | 14.9 × 14.9 × 33.4 in | — | — |