The Ontario Building Code | Connections of More Than One Appliance
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 appliancesand the connections are made as described in Sentences (2) and (3).
(2) Where two or more solid 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.
In Plain Language
Where more than one appliance connects to a chimney, this article sets out the specific requirements that apply to that shared arrangement.
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.