- 1.2-Pack, 3-Stage Filtration H13 HEPA Filters: a single replacement unit that contains the mesh pre-filter, high-efficiency HEPA filter, and activated charcoal all in one. - Compatibility: designed for MEGAWISE EPI235A (2022 Updated Version) Air Purifier HHAP0006-1; fits models after 21 Nov 2022. - Filtration performance: H13 HEPA captures up to 99.97% of PM2.5 particles as small as 0.3 microns, including dust, pet dander, and other minute particles. Activated carbon reduces chemicals, VOCs, tobacco smoke, PM2.5, and common household odors. Fine mesh layer prevents larger particles such as dander and pet hair. - Maintenance: replace regularly to keep your purifier fresh and effective. For best performance, clean the filter monthly with a soft brush or vacuum. - Use scenarios: ideal for pet owners to minimize dander and hair in living spaces; suitable for rooms with tobacco smoke or cooking odors to reduce smells; appropriate for bedrooms, living rooms, or home offices to improve overall indoor air quality.