Dreame AirPursue PM20 moves more air (CADR) and covers a larger room than FreAire KN-6391RGB.
Which purifier has higher CADR?
Dreame AirPursue PM20 has published CADR; FreAire KN-6391RGB does not.
Which purifier is quieter?
Dreame AirPursue PM20 lists a minimum of 60 dB; FreAire KN-6391RGB has no published figure.
Which purifier covers a larger room?
Dreame AirPursue PM20 is recommended for about 620 sq ft based on CADR.
Which purifier has better smart features?
Neither lists Wi-Fi or app control in our sources.
Which purifier has longer filter life?
Filter replacement interval is not published for either model.
Bottom line
Dreame AirPursue PM20 moves more air (CADR) and covers a larger room than FreAire KN-6391RGB.
| Metric | Dreame AirPursue PM20 | FreAire KN-6391RGB |
|---|---|---|
| CADR (smoke) | 400 CFM | — |
| Recommended room size | 620 sq ft | — |
| Claimed coverage | 7534 sq ft | 1086 sq ft |
| Noise | 60 dB | — |
| Filter type | HEPA-13, carbon, NANO filter, charcoal filter, photocatalyst UV lamp | — |
| Filter interval | — | — |
| Smart features | None | None |