Dreame AirPursue PM20 moves more air (CADR) and covers a larger room than ECOSELF HAP609 knq3pp.
Which purifier has higher CADR?
Dreame AirPursue PM20 has published CADR; ECOSELF HAP609 knq3pp does not.
Which purifier is quieter?
ECOSELF HAP609 knq3pp is quieter (20 vs 60 dB).
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?
ECOSELF HAP609 knq3pp lists Wi-Fi or app control; Dreame AirPursue PM20 does not.
Which purifier has longer filter life?
ECOSELF HAP609 knq3pp lists a replacement interval of Every 6–8 months; Dreame AirPursue PM20 does not.
Bottom line
Dreame AirPursue PM20 moves more air (CADR) and covers a larger room than ECOSELF HAP609 knq3pp.
| Metric | Dreame AirPursue PM20 | ECOSELF HAP609 knq3pp |
|---|---|---|
| CADR (smoke) | 400 CFM | — |
| Recommended room size | 620 sq ft | — |
| Claimed coverage | 7534 sq ft | 1800 sq ft |
| Noise | 60 dB | 20 dB |
| Filter type | HEPA-13, carbon, NANO filter, charcoal filter, photocatalyst UV lamp | HEPA (H13) |
| Filter interval | — | Every 6–8 months |
| Smart features | None | None |