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Smoke Detector Spacing for High Ceiling Spaces

Fire Protection Research Foundation report: “Smoke Detector Spacing for High Ceiling Spaces”
Authors: Robert Accosta Jr., P.E. and Drew Martin
Date of issue: October 2017


NFPA 72, National Fire Alarm and Signaling Code, does not address spacing consideration for smoke detection based on ceiling heights. However, there is a table that allows for reduction of spacing for heat detection. There has been confusion in design and code enforcement on what to do when smoke detectors are installed on higher ceilings. There is a need for clarification on how to apply smoke detection spacing requirements. To provide guidance, the Technical Committee needs additional information on the impact of ceiling height and detector spacing on smoke detection performance.