The Ontario Building Code | Scope

3.6.1.1. Scope

(1) The provisions of this Section apply to horizontal service spaces, vertical service spaces, attic or roof spaces, ducts, crawl spaces, shaft spaces, service rooms, and mechanical penthouses, and facilities contained in any of them.

(2) Except for plenum requirements in 3.6.4.3., the fire safety characteristics of heating, ventilating and air-conditioning systems shall comply with Part 6.