The Ontario Building Code | Clearances
6.2.7.1. Clearances
(1) Every unit heater using either steam or hot water as the heating medium shall be installed such that the clearances between the appliance and adjacent combustiblematerial conform to Table 6.2.9.3.
6.2.8. Radiators and Convectors
In Plain Language
Every unit heater using steam or hot water as its heating medium must be installed with clearances between the appliance and adjacent combustible material meeting the values set out in a dedicated clearance table.
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.