Coway Airmega 400S

The Coway Airmega 400S is a powerhouse designed for very large spaces up to 1,560 sq ft. It employs a dual True HEPA and activated carbon filtration system in a unique twin-fan design for rapid air circulation. Its standout features include a real-time air quality indicator, a highly responsive auto mode that adjusts fan speed based on pollution levels, and a washable pre-filter that extends main filter life. Aimed at homeowners with open floor plans or severe allergy concerns, it's a high-tier investment.

It earns its spot for exceptional CADR ratings, reliable smart functionality through the IoCare app, and proven performance in independent testing.