The Coway AIRMEGA MAX2 Air Purifier Replacement Filter 300/300s is designed for whole house use with a coverage of 1256 sq.ft. It utilizes HEPA-Type filtration technology to capture gases, fumes, tobacco smoke, allergens, and pollen, ensuring cleaner indoor air. This genuine Coway filter is specifically designed for use with the Air Purifier model 300/300s, providing California Prop 65 warning compliance for safety. Ideal for those looking to maintain high indoor air quality in larger living spaces, this replacement filter is a reliable choice for effectively reducing contaminants in the air.