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UL 539 Ed. 8-2022

Single and Multiple Station Heat Alarms - Published Date: January 14, 2025

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

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