Coway Airmega 200M True HEPA Air Purifier For $129.99 Shipped From Walmart Coway Airmega 200M is designed to accommodate large room sizes up to 361 sq. ft. (CADR: Dust 246 / Pollen 240 / Smoke 233). Coway Airmega’s 4-Stage Filtration System (Pre-filter, Deodorization filter, True HEPA filter, Vital Ion) captures and reduces up to 99.97% […]