Compatible with 240 air purifier The 240 replacement filter is designed to fit the 240 air purifier precisely. It is reliable, durable, and easy to install. 3-stage filtration with True HEPA 3-stage filtration system: - Stage 1: A pre-filter catches large particles - Stage 2: The True HEPA filter attracts 99.97% of airborne particles - Stage 3: A carbon filter absorbs indoor odors from smoke, cooking and pets Breathe fresh and cleaner air Changing the filter every 6–8 months is recommended; the exact lifespan depends on usage. Consider a filter subscription if you prefer not to remember when to replace. Value pack Includes a 4-pack of 240 True HEPA Filters. Filters are packed separately to effectively ensure the tightness of each filter part. Use scenarios - In family rooms with pets to reduce dander and odors - In kitchens to minimize cooking smells and improve air quality - In bedrooms or home offices to reduce dust and create a cleaner sleeping or working environment Performance and compatibility notes Designed specifically for the 240 air purifier, this replacement filter delivers a three stage filtration approach with a true HEPA component and an activated carbon layer for odor control. Each filter is built to maintain performance over its replacement interval.