The Ontario Building Code | Service Facilities
3.10.2.6. service Facilities
(1) Except as provided in Sentence (2), the requirements in Section 3.6. shall apply.
(2) Except where located in and serving only the dwelling units, a fuel-fired appliance shall be located in a service room separated from the remainder of the building by a fire separation having a fire-resistance rating not less than 1 h.
In Plain Language
Section 3.6's service-space requirements generally apply, except a fuel-fired appliance serving only the dwelling units must be located in a service room with at least a 1-hour fire separation from the rest of the building.
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.