Metal Liners

(1)  Metal liners shall be constructed of at least 0.3 mm thick stainless steel.               

(2)  Except as provided in Sentence 9.22.10.2.(3), metal liners referred to in Sentence (1) shall only be used in chimneys serving gas- or oil-burning appliances.

Article 9.21.3.6 Ontario Regulation 332/12 Building Code,   Information published by oncodes.ca for educational purposes only.