The Ontario Building Code | Factory-Built Chimneys
9.21.1.2. Factory-Built Chimneys
(1) Factory-built chimneys serving solid fuel-burning appliances, and their installation, shall conform to CAN/ULC-S629-M, "650°C Factory-Built Chimneys".
In Plain Language
Factory-built chimneys, prefabricated metal chimney systems, must conform to the standards referenced in this article.
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.