A-A-50554 1997 Edition, October 9, 1997
FILTER, AIR-EXTENDED AREA, INITIAL INSTALLATION
Includes all amendments and changes through Validation Notice 1, December 11, 2002
This specification covers replaceable, extended media area type air filters with externally supported, nonsupported, or self-supporting cartridges. The filters are installed in permanent metal holding frames and housings as required for use in air conditioning, heating, and ventilating systems for removing particulate matter found in the atmosphere.