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Pre Filter for NorAir Negative Air Machine - 13'' x 13'' - Case of 40
40/Case.
Extended the life of your HEPA filters by protecting them with pre filters. Pre filters should be changed daily in order to keep your air machine and HEPA filters at maximum efficiency.
This type of filter fits: NorAir 800 Aerospa..
This type of filter fits: NorAir 800 Aerospace America 500 Mag.Pullman Ermator A600 (filters may be slightly oversized as A600 units are slightly under 13".)
*on webstore orders over $100 in the contiguous US; some exclusions apply