UL 539

Standard for Single and Multiple Station Heat Alarms

1.1 These requirements cover heat-actuated, single and multiple station heat alarms intended for indoor installation in accordance with the National Fire Alarm Code, NFPA 72, Chapter 11.

1.2 These requirements do not cover electrically operated single or multiple station smoke or heat alarms.


  • Edition Number: 6
  • Edition Date: 01/30/2009
  • Price Code: C
  • Type: ulstd
  • ANSI Approved: 12/23/2014
  • DOD Approved: