The Surround Air multi-tech 8500 spare filter cartridge features three filters in one. The professional-grade HEPA air filter is not like the average HEPA in this category. It uses ultra fibrous and absorbent material to better capture dust, dust mites, pollen, pet dander, mold spores, ragweed and other types of airborne allergens. For chemical vapors, odors and cigarette smoke, the mt-8500 also includes an activated carbon filter, generally considered the most effective filter type for these categories of pollutants. The washable pre-filter captures larger particles to enhance the lifespan and performance of the HEPA and carbon filters.
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