Fan H-HF670-VP Replacement Value Pack for HP670 Tower Purifier

Silver nanoparticles in the EcoSilver pre-filter prevent the growth of microorganism on the filter, including bacteria and viruses Coconut carbon in the pre-filter neutralizes odors, smoke, pollutants, and allergens True HEPA filtration removes up to 99.9% of airborne particles as small as 0.3 microns in size including smoke, dust, pollen, pet hair and dander, mold spores and dust mites Recommended to replace HEPA filter every 6 months and pre-filter every 3 months for maximum efficiency, or more often depending on air quality & environmental factors Package contains 1 replacement HEPA filter and 2 pre-filters