Blueair Blue Signature moves more air (CADR) and covers a larger room than PuroAir 240.
Which purifier has higher CADR?
Blueair Blue Signature has published CADR; PuroAir 240 does not.
Which purifier is quieter?
Blueair Blue Signature is quieter (23 vs 24 dB).
Which purifier covers a larger room?
Blueair Blue Signature is recommended for about 705 sq ft based on CADR.
Which purifier has better smart features?
Blueair Blue Signature lists Wi-Fi or app control; PuroAir 240 does not.
Which purifier has longer filter life?
Blueair Blue Signature lists a replacement interval of 179.99; PuroAir 240 does not.
Bottom line
Blueair Blue Signature moves more air (CADR) and covers a larger room than PuroAir 240.
| Metric | Blueair Blue Signature | PuroAir 240 |
|---|---|---|
| CADR (smoke) | 455 CFM | — |
| Recommended room size | 705 sq ft | — |
| Claimed coverage | 3385 sq ft | — |
| Noise | 23 dB | 24 dB |
| Filter type | HEPASilent | HEPA |
| Filter interval | 179.99 | — |
| Smart features | None | None |