Blueair Blue Pure 411i+ Max
Cheap filters that last up to a year: one of the lowest running costs here.
Specs
| CADR — smoke | 167 cfm |
|---|---|
| CADR — dust | 174 cfm |
| CADR — pollen | 189 cfm |
| Room size (4.8 air changes/hour) | 261 sq ft |
| Noise | 19–46 dB |
| Max power | 20 W |
| Replacement filter | Blue Pure 411i Max Particle + Carbon Filter: $30, up to 12 months |
| Yearly running cost (est.) | $42 (filters $30 + power $12) |
| App control | Yes |
| Price | $144 |
Source: Blueair. Checked 2026-09-25.
How fast does it clean?
| Room (8 ft ceiling) | Air changes/hr | Verdict |
|---|---|---|
| Small bedroom (150 sq ft) | 8.3 | Great |
| Bedroom (250 sq ft) | 5.0 | Great |
| Living room (400 sq ft) | 3.1 | Light duty |
| Open plan (600 sq ft) | 2.1 | Too small |
What it costs to own
Over three years: $270 — the $144 purchase plus about $42 a year in filters and electricity.