Keep up with recommended filter changes and ensure your AeraMax SE Air Purifier is providing the most power purification possible with this AeraMax SE Combo Filter. It combines the function of three filters - Fellowes Pre-Filter, H13 True HEPA Filter and Carbon Filter - for optimal purification. H13 True HEPA filtration function captures up to 99.95 percent of particles as small as 0.1 microns including allergens, pollen, dust, pet dander and smoke. Filter provides a long-lasting, one-year estimated life depending on filter conditions.