Choose Ecoself HAP609 knq3pp if you want Wi-Fi or app control.
Which purifier has higher CADR?
CADR is not published for either model.
Which purifier is quieter?
Both list a minimum of 20 dB.
Which purifier covers a larger room?
Recommended room size cannot be derived because CADR is missing.
Which purifier has better smart features?
Ecoself HAP609 knq3pp lists Wi-Fi or app control; Ecoself HAP602 does not.
Which purifier has better filtration?
Ecoself HAP602 lists 3-Stage True HEPA; Ecoself HAP609 knq3pp lists HEPA (H13).
Bottom line
Choose Ecoself HAP609 knq3pp if you want Wi-Fi or app control.
| Metric | Ecoself HAP602 | Ecoself HAP609 knq3pp | Difference / Winner |
|---|---|---|---|
| Manufacturer claimed coverage | 2400 sq ft | 1800 sq ft | — |
| Minimum noise | 20 dB | 20 dB | — |
| Filter type | 3-Stage True HEPA | HEPA (H13) | — |
| Replacement interval | — | Every 6–8 months | — |
| Wi-Fi / app | No | Yes | — |
| Weight | 6.6 lb | 3.8 lb | — |