Coway Airmega 300
Round Max2-filter tower for larger rooms with auto, eco and sleep modes; no Wi-Fi or app.
Specs
| CADR — smoke | 285 cfm |
|---|---|
| CADR — dust | 306 cfm |
| CADR — pollen | 339 cfm |
| Room size (4.8 air changes/hour) | 445 sq ft |
| Noise | 22–52 dB |
| Max power | 57 W |
| Replacement filter | Airmega 300•300S Max2 Filter Set: $99, up to 12 months |
| Yearly running cost (est.) | $133 (filters $99 + power $34) |
| App control | No |
| Price | $549 |
Source: Coway. Checked 2026-09-25.
How fast does it clean?
| Room (8 ft ceiling) | Air changes/hr | Verdict |
|---|---|---|
| Small bedroom (150 sq ft) | 14.3 | Great |
| Bedroom (250 sq ft) | 8.6 | Great |
| Living room (400 sq ft) | 5.3 | Great |
| Open plan (600 sq ft) | 3.6 | Light duty |
What it costs to own
Over three years: $948 — the $549 purchase plus about $133 a year in filters and electricity.