In Plain Language

Single-wall metal smoke stacks must be designed and installed in conformance with NFPA 211, the referenced national standard covering chimneys, fireplaces, vents, and solid-fuel-burning appliances.

This is a plain-language summary of the 2012/2017 Ontario Building Code text above, for general understanding only and not a substitute for the Code. Always confirm current requirements against the 2024 edition (O.Reg. 163/24) or a qualified professional before construction.