Blueair Blue Signature (Medium)
Furniture-style design; filters rated up to 12 months.
Specs
| CADR — smoke | 321 cfm |
|---|---|
| CADR — dust | 309 cfm |
| CADR — pollen | 330 cfm |
| Room size (4.8 air changes/hour) | 502 sq ft |
| Noise | 19–54 dB |
| Max power | 36 W |
| Replacement filter | Blue Signature Medium Filter: $70, up to 12 months |
| Yearly running cost (est.) | $91 (filters $70 + power $21) |
| App control | Yes |
| Price | $300 |
Source: Blueair. Checked 2026-09-25.
How fast does it clean?
| Room (8 ft ceiling) | Air changes/hr | Verdict |
|---|---|---|
| Small bedroom (150 sq ft) | 16.1 | Great |
| Bedroom (250 sq ft) | 9.6 | Great |
| Living room (400 sq ft) | 6.0 | Great |
| Open plan (600 sq ft) | 4.0 | Good |
What it costs to own
Over three years: $574 — the $300 purchase plus about $91 a year in filters and electricity.