1.1 These requirements cover heat-actuated, single and multiple station heat alarms intended for indoor installation in accordance with:
a) In Canada:
1) The National Building Code of Canada,
2) The National Fire Code of Canada,
b) In the United States:
3) The National Fire Alarm and Signaling Code, NFPA 72
This revision of ANSI/UL 539 dated January 14, 2025 includes alignment of Maximum Ambient Temperature of Heat Alarms with NFPA 72: Table 7.1 and 7.2A.
RevisionsRed Line Std. (2)
CSDS Proposals (1)
CSDS Proposals
An electronic document associated with a UL Standard for Safety or Outline of Investigation, and issued by UL to propose:
UL LLC CRD (0)
Other Updates (0)
Referenced Standards (27)
Reverse Referenced Standards (1)
The cost to purchase this Standard varies depending on whether you are ordering a hardcopy, PDF or combination of the two. We also offer two different types of subscriptions: a one year and a three year.
You will be able to choose your purchase options on the following pages.
To serve you better, please update your account details.
Sample