Steel Liners

(1)  Steel liners for fireplaces shall conform to CAN/ULC-S639M, “Steel Liner Assemblies for Solid-Fuel Burning Masonry Fireplaces”, and shall be installed in accordance with the installation instructions in that standard.

Article 9.22.2.3. Ontario Regulation 332/12 Building Code,   Information published by oncodes.ca for educational purposes only.