UL-680 Complete Document History
Standard for Emergency Vault Ventilators and Vault-Ventilating Ports

Complete Current Edition:
   8TH EDITION - EMERGENCY VAULT VENTILATORS & - Nov. 26, 2002
   CHANGE 09/04 - REVISION CHANGE - CODE D - Sept. 24, 2004
   CHANGE 03/06 - REVISION CHANGE - CODE D - March 29, 2006
   CHANGE 06/09 - REVISION CHANGE - CODE D - June 25, 2009
   CHANGE 01/14 - REVISION CHANGE - CODE D - Jan. 31, 2014
   CHANGE 07/18 - REVISION CHANGE - CODE A - July 20, 2018

Obsolete Revision Information:
   7TH EDITION - EMERGENCY VAULT VENTILATORS & - Jan. 1, 1996
   6TH EDITION - EMERGENCY VAULT VENTILATORS & - Jan. 1, 1991