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Koch Air Filter 15 x 20 x 1 MERV 8 Air Filter 12 Pack Airborne Infection Control Systems cleaner air all year round DFS CAR FF685 PK2 DUR cleaner air all year round The Nordyne 918396 air filter media should be changed once a year in standard applications for low maintenance Media: 100% Non woven synthetic non moisture absorbing media manufactured from recycled material with a MERV 8 efficiency rating and a UL 900 Class 2 listing The Koch 102 700 005 air filter media should be checked every month
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