FreAire B0HBJ3N8BD moves more air (CADR) and covers a larger room than KNKA APH4000.
Which purifier has higher CADR?
FreAire B0HBJ3N8BD has higher CADR (559 vs 226 CFM).
Which purifier is quieter?
Both list a minimum of 22 dB.
Which purifier covers a larger room?
FreAire B0HBJ3N8BD fits a larger room (about 866 vs 350 sq ft recommended from CADR).
Which purifier has better smart features?
FreAire B0HBJ3N8BD lists Wi-Fi or app control; KNKA APH4000 does not.
Which purifier has longer filter life?
FreAire B0HBJ3N8BD lists a replacement interval of 19 months; KNKA APH4000 does not.
Bottom line
FreAire B0HBJ3N8BD moves more air (CADR) and covers a larger room than KNKA APH4000.
| Metric | FreAire B0HBJ3N8BD | KNKA APH4000 |
|---|---|---|
| CADR (smoke) | 559 CFM | 226 CFM |
| Recommended room size | 866 sq ft | 350 sq ft |
| Claimed coverage | 2390 sq ft | 1695 sq ft |
| Noise | 22 dB | 22 dB |
| Filter type | HEPA | HEPA |
| Filter interval | 19 months | — |
| Smart features | None | None |