Medify Air MA-40 moves more air (CADR) and covers a larger room than KNKA APH4000.
Which purifier has higher CADR?
Medify Air MA-40 has higher CADR (380 vs 226 CFM).
Which purifier is quieter?
KNKA APH4000 is quieter (22 vs 46 dB).
Which purifier covers a larger room?
Medify Air MA-40 fits a larger room (about 589 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?
Medify Air MA-40 lists a replacement interval of 4-5 months; KNKA APH4000 does not.
Bottom line
Medify Air MA-40 moves more air (CADR) and covers a larger room than KNKA APH4000.
| Metric | Medify Air MA-40 | KNKA APH4000 |
|---|---|---|
| CADR (smoke) | 380 CFM | 226 CFM |
| Recommended room size | 589 sq ft | 350 sq ft |
| Claimed coverage | 1793 sq ft | 1695 sq ft |
| Noise | 46 dB | 22 dB |
| Filter type | HEPA H14 | HEPA |
| Filter interval | 4-5 months | — |
| Smart features | None | None |