Description One Filter, Three Functions: Combined Pre-Filter, H13 True HEPA and Carbon Filter H13 True HEPA Filtration: Captures up to 99.95% of particles as small as 0.1 microns including allergens, pollen, dust, pet dander and smoke Long-Lasting Performance: One-year estimated filter life (depending on usage conditions) 1 combo filter included: Perfect for quick filter changes To ensure your AeraMax SE is providing the most powerful air purification possible, it is essential to keep up with recommended filter changes. The AeraMax SE Combo Filter is comprised of the (three) filter(s) your AeraMax SE needs to maintain H13 True HEPA filtration, while effectively removing 99.95% of particles as small as 0.1 microns including allergens, pollen, dust, pet dander and smoke. Each filter has an impressive lifespan of 1 year, making yearly filter changes a small but important part of keeping your space safe.