Blueair Blue Pure 211i Max
Among the highest CADRs here at a moderate price.
Specs
| CADR — smoke | 435 cfm |
|---|---|
| CADR — dust | 452 cfm |
| CADR — pollen | 450 cfm |
| Room size (4.8 air changes/hour) | 680 sq ft |
| Noise | 23–53 dB |
| Max power | 46 W |
| Replacement filter | Blue Pure 211i Max Particle + Carbon Filter: $70, up to 9 months |
| Yearly running cost (est.) | $121 (filters $93 + power $27) |
| App control | Yes |
| Price | $350 |
Source: Blueair. Checked 2026-09-25.
How fast does it clean?
| Room (8 ft ceiling) | Air changes/hr | Verdict |
|---|---|---|
| Small bedroom (150 sq ft) | 21.8 | Great |
| Bedroom (250 sq ft) | 13.1 | Great |
| Living room (400 sq ft) | 8.2 | Great |
| Open plan (600 sq ft) | 5.4 | Great |
What it costs to own
Over three years: $712 — the $350 purchase plus about $121 a year in filters and electricity.