Choose Blueair Blue Signature for higher CADR and larger-room coverage and lower noise.
Which purifier has higher CADR?
The Blueair Blue Signature has a smoke CADR of 455 CFM versus 160 CFM for the Blueair Blue Signature Small, a difference of 184%.
Which purifier is quieter?
Blueair Blue Signature is quieter (23 vs 50 dB).
Which purifier covers a larger room?
Blueair Blue Signature fits a larger room (about 705 vs 248 sq ft recommended from CADR).
Which purifier has better smart features?
Both list smart features (7 stages of filtration, 10x more odor removal, Smart VOC sensor, Dynamic display vs 7 stages of superior filtration, Smart VOC sensing, HEPASilent filtration technology captures 99.97% of tiny airborne pollutants).
Which purifier has better filtration?
Both list HEPASilent filtration.
Bottom line
Choose Blueair Blue Signature for higher CADR and larger-room coverage and lower noise.
| Metric | Blueair Blue Signature | Blueair Blue Signature Small | Difference / Winner |
|---|---|---|---|
| Smoke CADR | 455 CFM | 160 CFM | Blueair Blue Signature (+184%) |
| Recommended room size | 705 sq ft | 248 sq ft | Blueair Blue Signature (+184%) |
| Manufacturer claimed coverage | 3385 sq ft | 248 sq ft | — |
| Minimum noise | 23 dB | 50 dB | Blueair Blue Signature |
| Filter type | HEPASilent | HEPASilent | — |
| Power | 42 W | 20 W | — |
| Wi-Fi / app | Yes | Yes | — |
| Dimensions | 17.2 × 15.5 × 15.5 in | — | — |
| Weight | 13.2 lb | 5.64 lb | — |