AAF HEPA Decoder

Source — AAF Flanders HEPA & ULPA catalog, Alpha/Alpha 2000 style code, plus the legacy Flanders Model Number Designating Code and Alpha 2000 Component Chart. Where the sheets disagree, the current AAF table wins and the difference is flagged.

Read this before quoting — AAF states the style code is for identifying components in catalogued filters and should not be used to build a filter from arbitrary components; not every combination is available. Certified efficiency comes from the sealant/grade position and the filter's own serialized test label, not from the media code alone. Confirm against the label before crossing.