Dreame AirPursue PM20 vs KNKA APH4000

Dreame AirPursue PM20 moves more air (CADR) and covers a larger room than KNKA APH4000.

Which purifier has higher CADR?

Dreame AirPursue PM20 has higher CADR (400 vs 226 CFM).

Which purifier is quieter?

KNKA APH4000 is quieter (22 vs 60 dB).

Which purifier covers a larger room?

Dreame AirPursue PM20 fits a larger room (about 620 vs 350 sq ft recommended from 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 KNKA APH4000.

MetricDreame AirPursue PM20KNKA APH4000
CADR (smoke)400 CFM226 CFM
Recommended room size620 sq ft350 sq ft
Claimed coverage7534 sq ft1695 sq ft
Noise60 dB22 dB
Filter typeHEPA-13, carbon, NANO filter, charcoal filter, photocatalyst UV lampHEPA
Filter interval
Smart featuresNoneNone

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Methodology