UL-900 Complete Document History
Standard for Air Filter Units

Complete Current Edition:
   8TH EDITION - Standard for Air Filter Units - April 21, 2015
   CHANGE 08/22 - REVISION CHANGE - CODE A - Aug. 1, 2022

Obsolete Revision Information:
   CHANGE 02/12 - REVISION CHANGE - CODE A - Feb. 14, 2012
   CHANGE 11/09 - REVISION CHANGE - CODE A - Nov. 6, 2009
   CHANGE 11/07 - REVISION CHANGE - CODE A - Nov. 28, 2007
   7TH EDITION - Standard for Air Filter Units - Sept. 2, 2004
   6TH EDITION - Standard for Air Filter Units - Nov. 28, 1994
   AMENDMENT 1 - AIR FILTER UNITS - March 28, 1988
   1987 EDITION - Standard for Air Filter Units - Jan. 29, 1987