Blueair Blue Signature (Small)
Smallest of the furniture-style Signature line; 20 W at full speed and filters rated up to 12 months.
Specs
| CADR — smoke | 160 cfm |
|---|---|
| CADR — dust | 167 cfm |
| CADR — pollen | 179 cfm |
| Room size (4.8 air changes/hour) | 250 sq ft |
| Noise | 19–50 dB |
| Max power | 20 W |
| Replacement filter | Blue Signature Small Replacement Filter: $40, up to 12 months |
| Yearly running cost (est.) | $52 (filters $40 + power $12) |
| App control | Yes |
| Price | $180 |
Source: Blueair. Checked 2026-09-26.
How fast does it clean?
| Room (8 ft ceiling) | Air changes/hr | Verdict |
|---|---|---|
| Small bedroom (150 sq ft) | 8.0 | Great |
| Bedroom (250 sq ft) | 4.8 | Good |
| Living room (400 sq ft) | 3.0 | Light duty |
| Open plan (600 sq ft) | 2.0 | Too small |
What it costs to own
Over three years: $336 — the $180 purchase plus about $52 a year in filters and electricity.