Coway Airmega 350 review
A very high-output domestic purifier with 713.6m³/h CADR, designed for genuinely large living spaces rather than simply stretching a smaller machine beyond its ideal room size.
£269.99 direct from Amazon UK at time of writing
Our verdict
Our Best Large-Room Mainstream pick. With a stated 713.6 m³/h CADR, the Airmega 350 has far more output than typical domestic purifiers while remaining a mainstream consumer product.
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Who it suits
- Large living rooms and open-plan ground floors
- Households that want high airflow without commercial pricing
- Buyers who prefer straightforward controls to app dependence
- Rooms where smaller purifiers have visibly struggled
Room size and airflow
Coway states 185.5 m² coverage from a 713.6 m³/h CADR. We would use the CADR: it is roughly six times the Airmega 50's figure, which is a fair reflection of the difference in the size of room each machine can realistically keep clean.
Filtration
Three-stage filtration with 360-degree and bottom intake, so the unit draws air from more directions and is less sensitive to placement than side-intake designs.
Noise and everyday use
A 21.6 dB minimum in silent mode is impressive for a machine of this output, though maximum-speed noise will be noticeable in a quiet room.
Running and ownership costs
62 W at maximum and a filter life of around one year. Auto mode keeps the fan low most of the time, so real-world consumption is usually well below peak.
Full specifications
- CADR
- 713.6 m³/h (manufacturer stated)
- Room coverage
- 185.5 m² (Coway methodology)
- Filtration
- Three-stage
- Air intake
- 360-degree plus bottom intake
- Air-quality indicator
- Yes
- Modes
- Auto and silent
- Minimum sound
- 21.6 dB
- Power
- 62 W
- Filter life
- Around one year
- Warranty
- 3 years, subject to Coway registration terms
Specifications as published by the manufacturer. Coverage figures use each manufacturer's own air-change assumptions and are not directly comparable between brands.
Strengths
- Very high stated CADR for a domestic machine
- 21.6 dB minimum is low given the output available
- Three-year warranty subject to Coway's registration terms
Considerations
- 185.5 m² is a manufacturer figure and not comparable across brands
- Physically large and heavy
- 62 W maximum draw is higher than compact models
Our view
We recommend the Airmega 350 for buyers who genuinely have a large space and want mainstream support and warranty cover rather than a commercial-grade machine.
Alternatives worth comparing
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Veralis AirX Pro AXP-800
With 720m³/h output, the AXP-800 is aimed at spaces where a conventional domestic purifier simply lacks the airflow — large open-plan ground floors, studios and substantial shared rooms.
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