Airmega 400

Large open floor plans present specific challenges for air purification. Volume expands faster than surface area as rooms scale up, requiring proportionally greater air exchange to maintain quality. Coway developed the Airmega 400 for these situations, engineering sufficient capacity to handle expansive living spaces and combined areas that smaller units cannot adequately serve.

The cube silhouette demonstrates restraint unusual in high-capacity appliances. Soft edges and clean surfaces allow the unit to blend with contemporary interiors rather than announcing itself as industrial equipment temporarily residing in domestic space. The footprint remains reasonable despite the internal volume required for effective large-room filtration.

Inside, the Max2 filter system layers two capture mechanisms. Green True HEPA addresses particulate matter including pollen, dust, pet dander, and the fine particles that penetrate deepest into respiratory systems. Activated carbon handles the gaseous pollutants HEPA cannot touch: smoke compounds, volatile organic chemicals, cooking odors, and the outgassing from new furniture and finishes. Together they address the full spectrum of indoor air concerns.

Real-time monitoring tracks air quality continuously, feeding data to the automatic mode system. Auto adjusts fan speed in response to detected changes, ramping up when cooking or cleaning activities temporarily degrade conditions. Eco mode minimizes energy consumption during periods of sustained good quality. Sleep mode reduces noise and dims indicators for nighttime operation. This intelligence means the unit manages itself effectively, intervening more aggressively when needed and conserving resources when conditions permit, maintaining air quality through varied activities without constant manual adjustment.