Coway Airmega 250S review: Smart and quiet air purification for larger spaces

At a glance Expert’s Rating Pros Three-way filtration for rooms up to 930 square feet Easy to use and maintain, with or without the smartphone app Filter replacement prompts based on volume of air treated, not just a calendar Cons Filter-replacement timer must be reset with button presses, not in the app Unattractive industrial design Our Verdict The Airmega 250S is quiet and very effective at