Code Library › Volume 1 › Section 3.2 — Building Fire Safety
PART 3 — FIRE PROTECTION, OCCUPANT SAFETY AND ACCESSIBILITYUpdated for the 2024 Ontario Building Code

3.2.4.10.Fire Detectors

(1) Fire detectors required by this Code shall be connected to the fire alarm system. (2) Except as permitted by Sentence (3), if a fire alarm system is required in a building that is not sprinklered, fire detectors shall be installed in the following spaces: (a) storage rooms not within dwelling units, (b) service rooms not within dwelling units, (c) janitors’ rooms, (d) rooms in which hazardous substances are to be used or stored, (See Note A-3.3.1.2.(1)), (e) elevator hoistways or dumbwaiter shafts, (f) laundry rooms in buildings of residential occupancy, but not those within dwelling units, and (g) hazardous classrooms and change rooms in elementary or secondary schools. (3) Fire detectors required by Sentence (2) need not be provided within floor areas that are sprinklered. (4) Fire detectors required by Sentence (2) shall be installed in elevator hoistways and dumbwaiter shafts where a sprinkler system is not installed within the hoistway or shaft.
← Previous3.2.4.9. Electrical SupervisionNext →3.2.4.11. Smoke and Heat Detectors

Common questions about this part of the code

When is noncombustible construction required under the Ontario Building Code?When are automatic sprinklers required in a building in Ontario?What are the fire department access route requirements under the Ontario Building Code?When is a fire alarm system required in a building in Ontario?

Understand this provision in seconds

BUILDAiD Assist explains any article of the building code in plain English — with exact citations, exceptions and related requirements.

Try BUILDAiD Beta

Code text is reproduced for reference from the Ontario Building Code (O. Reg. 163/24, 2024 Building Code Compendium). This page is provided for general information and is not an official copy. Always verify requirements against the official Ontario Building Code and confirm with your local building department.