Choose Blueair Blue Signature SP3i for higher CADR and larger-room coverage and Wi-Fi or app control. Choose Blueair 2-in-1 Pro Purify + Humidify if you want lower noise.
Which purifier has higher CADR?
The Blueair Blue Signature SP3i has a smoke CADR of 321 CFM versus 235 CFM for the Blueair 2-in-1 Pro Purify + Humidify, a difference of 37%.
Which purifier is quieter?
Blueair 2-in-1 Pro Purify + Humidify is quieter (20 vs 54 dB).
Which purifier covers a larger room?
Blueair Blue Signature SP3i fits a larger room (about 498 vs 364 sq ft recommended from CADR).
Which purifier has better smart features?
Blueair Blue Signature SP3i lists Wi-Fi or app control; Blueair 2-in-1 Pro Purify + Humidify does not.
Which purifier has better filtration?
Both list HEPASilent filtration.
Bottom line
Choose Blueair Blue Signature SP3i for higher CADR and larger-room coverage and Wi-Fi or app control. Choose Blueair 2-in-1 Pro Purify + Humidify if you want lower noise.
| Metric | Blueair Blue Signature SP3i | Blueair 2-in-1 Pro Purify + Humidify | Difference / Winner |
|---|---|---|---|
| Smoke CADR | 321 CFM | 235 CFM | Blueair Blue Signature SP3i (+37%) |
| Recommended room size | 498 sq ft | 364 sq ft | Blueair Blue Signature SP3i (+37%) |
| Manufacturer claimed coverage | 2250 sq ft | 391 sq ft | — |
| Minimum noise | 54 dB | 20 dB | Blueair 2-in-1 Pro Purify + Humidify |
| Filter type | HEPASilent | HEPASilent | — |
| Power | 36 W | Up to 60 W | — |
| Wi-Fi / app | Yes | No | — |
| Dimensions | — | 24.6 × 12.5 × 12.5 in | — |
| Weight | 9.5 lb | 18.5 lb | — |