UL-539 › Complete Document History
Standard for Single and Multiple Station Heat Alarms

Complete Current Edition:
   8TH EDITION - Standard for Single and Multiple Station Heat Alarms - June 24, 2022

Obsolete Revision Information:
   7TH EDITION - Standard for Single and Multiple Station Heat Alarms - April 28, 2017
   CHANGE 02/17 - REVISION CHANGE - CODE C - Feb. 17, 2017
   CHANGE 12/14 - REVISION CHANGE - CODE C - Dec. 23, 2014
   6TH EDITION - Standard for Single and Multiple Station Heat Alarms - Jan. 30, 2009
   CHANGE 08/05 - REVISION CHANGE - CODE B - Aug. 15, 2005
   5TH EDITION - Standard for Single and Multiple Station Heat Alarms - July 21, 2000
   4TH EDITION - Standard for Single and Multiple Station Heat Alarms - Jan. 1, 1995
   1991 EDITION - Standard for Single and Multiple Station Heat Alarms - Jan. 1, 1991