Masonry Chimneys and Flues
Canadian Building Code
9.21. Masonry & Concrete Chimneys and Flues
9.21.1. General
9.21.1.1. Application
1) This Section applies to:
a) rectangular masonry or concrete chimneys not more than 12 m in height serving fireplaces or serving appliances having combined total rated heat output of 120 kW or less, and
b) flue pipes connected to such chimneys.
2) Chimneys, other than those described in Sentence (1), gas vents and flue pipes serving gas-, oil- or solid-fuel-burning appliances and their associated equipment, including stoves, ranges and space heaters, covered by the standards referenced in Sentences 9.33.5.2.(1) and 9.33.5.3.(1), shall conform to Subsection 9.33.10.
3) Chimneys and flue pipes other than those described in Sentences (1) and (2) shall conform to Section 6.3.
a) rectangular masonry or concrete chimneys not more than 12 m in height serving fireplaces or serving appliances having combined total rated heat output of 120 kW or less, and
b) flue pipes connected to such chimneys.
2) Chimneys, other than those described in Sentence (1), gas vents and flue pipes serving gas-, oil- or solid-fuel-burning appliances and their associated equipment, including stoves, ranges and space heaters, covered by the standards referenced in Sentences 9.33.5.2.(1) and 9.33.5.3.(1), shall conform to Subsection 9.33.10.
3) Chimneys and flue pipes other than those described in Sentences (1) and (2) shall conform to Section 6.3.
9.21.1.2. Chimney or Flue Pipe Walls
1) The walls of any chimney or flue pipe shall be constructed so as to be smoke and flame-tight.
