Coway Airmega 250
Mid-size Airmega with a washable pre-filter.
Specs
| CADR — smoke | 249 cfm |
|---|---|
| CADR — dust | 261 cfm |
| CADR — pollen | 230 cfm |
| Room size (4.8 air changes/hour) | 389 sq ft |
| Noise | 22–54 dB |
| Max power | 64 W |
| Replacement filter | Airmega 250 Max2 Filter: $89, up to 12 months |
| Yearly running cost (est.) | $127 (filters $89 + power $38) |
| App control | No |
| Price | $399 |
Source: Coway. Checked 2026-09-25.
How fast does it clean?
| Room (8 ft ceiling) | Air changes/hr | Verdict |
|---|---|---|
| Small bedroom (150 sq ft) | 12.4 | Great |
| Bedroom (250 sq ft) | 7.5 | Great |
| Living room (400 sq ft) | 4.7 | Good |
| Open plan (600 sq ft) | 3.1 | Light duty |
What it costs to own
Over three years: $780 — the $399 purchase plus about $127 a year in filters and electricity.