Notice: This site currently shows the 2012/2017 edition of the Ontario Building Code. The current legally effective code is the 2024 edition (O.Reg. 163/24), in effect since January 1, 2025. Confirm current requirements at ontario.ca.
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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.