Choose Medify Air MA-40 for higher CADR and larger-room coverage and lower noise. Choose Blueair Blue Signature SP3i if you want Wi-Fi or app control.
Which purifier has higher CADR?
The Medify Air MA-40 has a smoke CADR of 380 CFM versus 321 CFM for the Blueair Blue Signature SP3i, a difference of 18%.
Which purifier is quieter?
Medify Air MA-40 is quieter (46 vs 54 dB).
Which purifier covers a larger room?
Medify Air MA-40 fits a larger room (about 589 vs 498 sq ft recommended from CADR).
Which purifier has better smart features?
Blueair Blue Signature SP3i lists Wi-Fi or app control; Medify Air MA-40 does not.
Which purifier has better filtration?
Medify Air MA-40 lists HEPA H14; Blueair Blue Signature SP3i lists HEPASilent.
Bottom line
Choose Medify Air MA-40 for higher CADR and larger-room coverage and lower noise. Choose Blueair Blue Signature SP3i if you want Wi-Fi or app control.
| Metric | Medify Air MA-40 | Blueair Blue Signature SP3i | Difference / Winner |
|---|---|---|---|
| Smoke CADR | 380 CFM | 321 CFM | Medify Air MA-40 (+18%) |
| Recommended room size | 589 sq ft | 498 sq ft | Medify Air MA-40 (+18%) |
| Manufacturer claimed coverage | 1793 sq ft | 2250 sq ft | — |
| Minimum noise | 46 dB | 54 dB | Medify Air MA-40 |
| Filter type | HEPA H14 | HEPASilent | — |
| Replacement interval | 4-5 months | — | — |
| Power | 54W | 36 W | — |
| Wi-Fi / app | No | Yes | — |
| Weight | 15.6 lb | 9.5 lb | — |