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Koch Air Filter 20 x 25 x 4 MERV 8 Pleated Air Filter 6 Pack Containment Standard configuration ships with two Central Air Purification Standard configuration ships with two 2" pleated particulate pre filters (H2002) that extend HEPA service life by capturing bulk particulate upstream ULV (Ultra Low Volume) cold fogging technology This filter should have the same if not higher efficiency rating as the original equipment manufacturers air filter media It is also unaffected by high humidity and is hydrophobic (non moisture absorbing)
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US$ 149.50
US$ 129.95