Choose Blueair Blue Pure 411i Max for lower noise.
Which purifier has higher CADR?
Both list a smoke CADR of 141 CFM.
Which purifier is quieter?
Blueair Blue Pure 411i Max is quieter (18 vs 24 dB).
Which purifier covers a larger room?
Both are recommended for about 219 sq ft based on CADR.
Which purifier has better smart features?
Both list smart features (WiFi connectivity, Auto mode, Air quality sensor vs app, Alexa, Google Assistant).
Which purifier has better filtration?
Blueair Blue Pure 411i Max lists HEPASilent; Levoit Core 300S lists True HEPA.
Bottom line
Choose Blueair Blue Pure 411i Max for lower noise.
| Metric | Blueair Blue Pure 411i Max | Levoit Core 300S | Difference / Winner |
|---|---|---|---|
| Smoke CADR | 141 CFM | 141 CFM | — |
| Recommended room size | 219 sq ft | 219 sq ft | — |
| Manufacturer claimed coverage | 1080 sq ft | — | — |
| Minimum noise | 18 dB | 24 dB | Blueair Blue Pure 411i Max |
| Filter type | HEPASilent | True HEPA | — |
| Replacement interval | 6-8 months | — | — |
| Power | 20 W | — | — |
| Wi-Fi / app | Yes | Yes | — |
| Weight | 7.5 lb | — | — |