Choose Alen 45i for lower noise and Wi-Fi or app control.
Which purifier has higher CADR?
Alen 45i has published CADR; PuroAir 240 does not.
Which purifier is quieter?
Alen 45i is quieter (23 vs 24 dB).
Which purifier covers a larger room?
Alen 45i is recommended for about 395 sq ft based on CADR.
Which purifier has better smart features?
Alen 45i lists Wi-Fi or app control; PuroAir 240 does not.
Which purifier has better filtration?
Both list HEPA filtration.
Bottom line
Choose Alen 45i for lower noise and Wi-Fi or app control.
| Metric | Alen 45i | PuroAir 240 | Difference / Winner |
|---|---|---|---|
| Smoke CADR | 255 CFM | — | — |
| Recommended room size | 395 sq ft | — | — |
| Manufacturer claimed coverage | 1900 sq ft | — | — |
| Minimum noise | 23 dB | 24 dB | Alen 45i |
| Filter type | HEPA | HEPA | — |
| Wi-Fi / app | Yes | No | — |
| Weight | 14 lb | — | — |