Replacement cassette contains a washable pre-filter which collects large particles such as pollen, lint, and pet hair, a true HEPA filter which captures 99.99% of particles and impurities as small as 0.3 microns, a nano-silver shield with silver particles one one-billionth of a meter in size which resists bacteria, and a washable carbon filter with activated granular carbon which effectively collects chemical vapors and odors caused by cigarette smoke, organic decay and cooking. Click for Price @ Sears.com
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