UL 539 PDF
Price range: $90.90 through $181.80
Single and Multiple Station Heat Alarms
1 Scope
1.1 These requirements cover heat-actuated, single and multiple station heat alarms intended for indoor installation in accordance with:
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a) In Canada:
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1) The National Building Code of Canada,
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2) The National Fire Code of Canada,
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b) In the United States:
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3) The National Fire Alarm and Signaling Code, NFPA 72
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Summary of Topics
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.
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