Code Library › Volume 1 › Section 9.21 — Masonry and Concrete Chimneys
PART 9 — HOUSING AND SMALL BUILDINGSUpdated for the 2024 Ontario Building Code

9.21.2.2.Connections of More Than One Appliance

(1) Except as required in Article 9.21.2.1., two or more fuel-burning appliances are permitted to be connected to the same chimney flue provided adequate draft is maintained for the connected appliances and the connections are made as described in Sentences (2) and (3). (2) Where 2 or more fuel-burning appliances are connected to the same chimney flue, the appliances must be located on the same storey. (3) The connection referred to in Sentence (2) for a solid fuel-burning appliance shall be made below connections for appliances burning other fuels.
← Previous9.21.2.1. Chimney Flue LimitationsNext →9.21.2.3. Inclined Chimney Flues

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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.