Appliances · Coway · 2017
Coway Airmega 400
The heaviest-duty unit here, sized for rooms most purifiers quietly cannot handle.
Overall
8.0
out of 10
Axis scores
Appliances is scored on these 5 axes. The total is their plain average — nothing is weighted.
Average of 5 axes
8.0/10
- Performance
- 9.0
- Value
- 7.0
- Durability
- 8.4
- Ease of use
- 8.2
- Quietness
- 7.6
- Performance — How well it does the core job
- Value — What the same money buys elsewhere
- Durability — Failure and fade reports past the one-year mark
- Ease of use — Setup, daily operation, cleaning, maintenance
- Quietness — Operating noise — a higher score means quieter
Specs
- Coverage
- Very large rooms
- Filter
- Dual intake, HEPA plus carbon
- Sensor
- Real-time particulate readout
As published by the manufacturer. We didn't measure these ourselves.
Is it for you
Buy it if
- A room large enough that smaller units cycle constantly
- You want a particulate number rather than a coloured light
- Dual-sided intake suits where the unit has to sit
Skip it if
- Proprietary filters that cost real money every six months
- Floor space is tight — the footprint is substantial
Two filter banks pulling from both sides is why this handles rooms that leave smaller purifiers running at full speed all day. The readout gives an actual particulate figure, which makes it possible to tell whether it is doing anything.
The ownership cost is the catch. Filters are proprietary and not cheap, and over three years they add up to a meaningful fraction of the purchase.
Last updated . The scoring method is on how we rank.