Choose Frigidaire FHAP2040A1 for lower noise and Wi-Fi or app control.
Which purifier has higher CADR?
The Frigidaire FHAP2040A1 has a smoke CADR of 227 CFM versus 226 CFM for the Knka APH4000, a difference of 0%.
Which purifier is quieter?
Frigidaire FHAP2040A1 is quieter (20 vs 22 dB).
Which purifier covers a larger room?
Frigidaire FHAP2040A1 fits a larger room (about 352 vs 350 sq ft recommended from CADR).
Which purifier has better smart features?
Frigidaire FHAP2040A1 lists Wi-Fi or app control; Knka APH4000 does not.
Which purifier has better filtration?
Both list HEPA filtration.
Bottom line
Choose Frigidaire FHAP2040A1 for lower noise and Wi-Fi or app control.
| Metric | Frigidaire FHAP2040A1 | Knka APH4000 | Difference / Winner |
|---|---|---|---|
| Smoke CADR | 227 CFM | 226 CFM | Frigidaire FHAP2040A1 (+0%) |
| Recommended room size | 352 sq ft | 350 sq ft | Frigidaire FHAP2040A1 (+1%) |
| Manufacturer claimed coverage | 1685 sq ft | 1695 sq ft | — |
| Minimum noise | 20 dB | 22 dB | Frigidaire FHAP2040A1 |
| Filter type | HEPA | HEPA | — |
| Replacement interval | 12 months | — | — |
| Power | — | 45 W | — |
| Wi-Fi / app | Yes | No | — |
| Weight | — | 9.7 lb | — |