This revision of CAN/ULC 552 dated November 18, 2024 includes a clarification to 5.1.3.
1.1 This Standard applies to the inspection, testing and maintenance of smoke alarms within dwelling units as well as within sleeping rooms / areas that are not part of dwelling units. (Refer to Annex A, Explanatory Materials, Clause A1.1 and Annex B, Enhancement of Fire Safety in Residential Occupancies.)
1.2 Requirements for the installation of smoke alarms are referenced in CAN/ULC 553, Standard for the Installation of Smoke Alarms.
1.3 This Standard does not cover systems incorporating residential fire warning systems. Requirements for these systems are referenced in CAN/ULC-S540, Standard for Residential Fire and Life Safety Warning Systems: Installation, Inspection, Testing and Maintenance. (Refer to Annex A, Explanatory Materials, Clause A1.3, Possible Installation Scenarios, and Annex D, Smoke Detector with Sounder Base)
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