Choose Blueair Blue Signature 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 has a smoke CADR of 455 CFM versus 235 CFM for the Blueair 2-in-1 Pro Purify + Humidify, a difference of 94%.
Which purifier is quieter?
Blueair 2-in-1 Pro Purify + Humidify is quieter (20 vs 23 dB).
Which purifier covers a larger room?
Blueair Blue Signature fits a larger room (about 705 vs 364 sq ft recommended from CADR).
Which purifier has better smart features?
Blueair Blue Signature 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 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 | Blueair 2-in-1 Pro Purify + Humidify | Difference / Winner |
|---|---|---|---|
| Smoke CADR | 455 CFM | 235 CFM | Blueair Blue Signature (+94%) |
| Recommended room size | 705 sq ft | 364 sq ft | Blueair Blue Signature (+94%) |
| Manufacturer claimed coverage | 3385 sq ft | 391 sq ft | — |
| Minimum noise | 23 dB | 20 dB | Blueair 2-in-1 Pro Purify + Humidify |
| Filter type | HEPASilent | HEPASilent | — |
| Power | 42 W | Up to 60 W | — |
| Wi-Fi / app | Yes | No | — |
| Dimensions | 17.2 × 15.5 × 15.5 in | 24.6 × 12.5 × 12.5 in | — |
| Weight | 13.2 lb | 18.5 lb | — |