Choose Levoit Vital Pet Pro if you want lower noise.
Which purifier has higher CADR?
The Alen 45i has a smoke CADR of 255 CFM versus 252 CFM for the Levoit Vital Pet Pro, a difference of 1%.
Which purifier is quieter?
Levoit Vital Pet Pro is quieter (21 vs 23 dB).
Which purifier covers a larger room?
Alen 45i fits a larger room (about 395 vs 391 sq ft recommended from CADR).
Which purifier has better smart features?
Both list smart features (True HEPA filtration, Whisper-quiet operation, Smart Sensor, Auto Mode vs Auto-Clean Technology, U-Shaped Air Inlet, Dual Air Quality Sensors, Smart Control via VeSync App).
Which purifier has better filtration?
Alen 45i lists HEPA; Levoit Vital Pet Pro lists 3-stage.
Bottom line
Choose Levoit Vital Pet Pro if you want lower noise.
| Metric | Alen 45i | Levoit Vital Pet Pro | Difference / Winner |
|---|---|---|---|
| Smoke CADR | 255 CFM | 252 CFM | Alen 45i (+1%) |
| Recommended room size | 395 sq ft | 391 sq ft | Alen 45i (+1%) |
| Manufacturer claimed coverage | 1900 sq ft | 1875 sq ft | — |
| Minimum noise | 23 dB | 21 dB | Levoit Vital Pet Pro |
| Filter type | HEPA | 3-stage | — |
| Replacement interval | — | every 6-8 months | — |
| Power | — | 39W | — |
| Wi-Fi / app | Yes | Yes | — |
| Dimensions | — | 32.8 × 20.5 × 45.8 cm | — |
| Weight | 14 lb | 5.3 kg | — |