Choose Blueair Blue Signature SP3i for higher CADR and larger-room coverage and Wi-Fi or app control. Choose Honeywell HPA300 if you want lower noise.
Which purifier has higher CADR?
The Blueair Blue Signature SP3i has a smoke CADR of 321 CFM versus 300 CFM for the Honeywell HPA300, a difference of 7%.
Which purifier is quieter?
Honeywell HPA300 is quieter (53 vs 54 dB).
Which purifier covers a larger room?
Blueair Blue Signature SP3i fits a larger room (about 498 vs 465 sq ft recommended from CADR).
Which purifier has better smart features?
Blueair Blue Signature SP3i lists Wi-Fi or app control; Honeywell HPA300 does not.
Which purifier has better filtration?
Blueair Blue Signature SP3i lists HEPASilent; Honeywell HPA300 lists True HEPA.
Bottom line
Choose Blueair Blue Signature SP3i for higher CADR and larger-room coverage and Wi-Fi or app control. Choose Honeywell HPA300 if you want lower noise.
| Metric | Blueair Blue Signature SP3i | Honeywell HPA300 | Difference / Winner |
|---|---|---|---|
| Smoke CADR | 321 CFM | 300 CFM | Blueair Blue Signature SP3i (+7%) |
| Recommended room size | 498 sq ft | 465 sq ft | Blueair Blue Signature SP3i (+7%) |
| Manufacturer claimed coverage | 2250 sq ft | — | — |
| Minimum noise | 54 dB | 53 dB | Honeywell HPA300 |
| Filter type | HEPASilent | True HEPA | — |
| Power | 36 W | — | — |
| Wi-Fi / app | Yes | No | — |
| Weight | 9.5 lb | — | — |