1) This Section applies to
a)rectangular masonry or concrete chimneys not more than 12 m in height serving fireplaces or serving appliances having a 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 184.108.40.206.(1) and 220.127.116.11.(1), shall conform to Subsection 9.33.10.
3) Chimneysand flue pipes other than those described in Sentences (1) and (2) shall conform to Section 6.3.
1) The walls of any chimney or flue pipe shall be constructed so as to be smoke- and flame-tight.
1) A chimney flue that serves a fireplace or incinerator shall not serve any other appliance.
2) A chimney flue that serves a solid-fuel-burning appliance shall not be connected to a natural-gas- or propane-fired appliance.
3) A chimney flue that serves a solid-fuel-burning appliance shall not be connected to an oil-burning appliance unless the solid-fuel-burning appliance is certified for such installation and the installation of both appliances meets the requirements of the relevant standards referenced in Article 18.104.22.168.
1) Except as required by Article 22.214.171.124., where two or more fuel-burning appliances are connected to the same chimney flue, the connections shall be made as described in Sentences (2) to (4) and an adequate draft shall be provided for the connected appliances in conformance with the requirements of applicable regulations or standards referenced in Subsection 9.33.10.
2) Where 2 or more fuel-burning appliances are connected to the same chimney flue, the appliances shall be located on the same storey.
3) The connection referred to in Sentence (2) for a solid-fuel-burning appliance shall be made below connections for appliances burning other fuels.
4) The connection referred to in Sentence (2) for a liquid-fuel-burning appliance shall be made below any connections for appliances burning natural gas or propane.
1) Chimney flues shall not be inclined more than 45° to the vertical.
1) Except for chimneys serving fireplaces, the size of a chimney flue shall conform to the requirements of the appliance installation standards referenced in Sentences 126.96.36.199.(1) and 188.8.131.52.(1).
2) Where a chimney flue serves only one appliance, the flue area shall be at least equal to that of the flue pipe connected to it.
1) The size of a chimney flue serving a masonry fireplace shall conform to Table 184.108.40.206.A or Table 220.127.116.11.B.
| Table 18.104.22.168.A
Diameter of Round Flues for Fireplace Chimneys
Forming Part of Sentence 22.214.171.124.(1)
|Chimney Height, m|
|3.0 to 4.5
||> 4.5 to 5.9
||> 5.9 to 8.9
||> 8.9 to 12
|Flue Diameter, mm|
|up to 0.150||110||170||100||160||90||150||90||150|
|0.151 to 0.250||150||210||130||190||130||190||120||180|
|0.251 to 0.350||180||240||160||220||150||210||140||200|
|0.351 to 0.500||220||280||200||260||190||250||170||230|
|0.501 to 0.650||260||320||230||290||220||280||200||260|
|0.651 to 0.800||290||350||260||320||240||300||220||280|
|0.801 to 1.00||330||390||290||350||270||330||250||310|
|1.01 to 1.20||360||420||320||380||300||360||270||330|
|1.21 to 1.40||390||450||350||410||330||390||300||360|
|1.41 to 1.60||420||480||380||440||350||410||320||380|
|1.61 to 1.80||—||—||400||460||370||430||340||400|
|1.81 to 2.00||—||—||—||—||400||460||360||420|
|2.01 to 2.20||—||—||—||—||—||—||380||440|
| Table 126.96.36.199.B
Rectangular Flue Sizes for Fireplace Chimneys
Forming Part of Sentence 188.8.131.52.(1)
|Chimney Height, m|
|3.0 to 4.5||> 4.5 to 5.9||> 5.9 to 8.9||> 8.9 to 12|
|Flue Size, mm|
|up to 0.150||200 x 200||200 x 200||100 x 200||100 x 200||100 x 200||100 x 200||100 x 200||100 x 200|
|0.151 to 0.250||200 x 200||200 x 200||200 x 200||200 x 200||200 x 200||200 x 200||200 x 200||200 x 200|
|0.251 to 0.350||200 x 300||200 x 300||200 x 200||200 x 300||200 x 200||200 x 200||200 x 200||200 x 200|
|0.351 to 0.500||300 x 300||300 x 300||200 x 300||200 x 300||200 x 300||200 x 300||200 x 200||200 x 300|
|0.501 to 0.650||300 x 300||300 x 400||300 x 300||300 x 300||300 x 300||300 x 300||200 x 300||200 x 300|
|0.651 to 0.800||300 x 400||300 x 400||300 x 300||300 x 400||300 x 300||300 x 300||300 x 300||300 x 300|
|0.801 to 1.00||400 x 400||400 x 400||300 x 400||300 x 400||300 x 400||300 x 400||300 x 300||300 x 300|
|1.01 to 1.20||400 x 400||400 x 400||400 x 400||400 x 400||300 x 400||300 x 400||300 x 400||300 x 400|
|1.21 to 1.40||—||—||400 x 400||400 x 400||400 x 400||400 x 400||300 x 400||300 x 400|
|1.41 to 1.60||—||—||—||—||400 x 400||400 x 400||400 x 400||400 x 400|
|1.61 to 1.80||—||—||—||—||—||—||400 x 400||400 x 400|
|1.81 to 2.00||—||—||—||—||—||—||400 x 400||400 x 400|
1) The width of an oval chimney flue shall be not less than two-thirds its breadth.
1) Every masonry or concrete chimney shall have a lining of clay, concrete, firebrick or metal.
1) Joints of chimney liners shall be sealed to provide a barrier to the passage of flue gases and condensate into the cavity between the liner and the surrounding masonry.
2) Joints of clay, concrete or firebrick chimney liners shall be struck flush to provide a straight, smooth, aligned chimney flue.
1) Clay liners shall conform to CAN/CSA-A324-M, “Clay Flue Liners.”
2) Liners referred to in Sentence (1) shall be not less than 15.9 mm thick and shall be capable of resisting, without softening or cracking, a temperature of 1 100°C.
1) Firebrick liners shall conform to ASTM C 27, “Classification of Fireclay and High-Alumina Refractory Brick.”
2) Firebrick liners shall be laid with high temperature cement mortar conforming to CAN/CGSB-10.3, “Air Setting Refractory Mortar.”
1) Concrete flue liners shall conform to Clause 184.108.40.206. of CAN/CSA-A405-M, “Design and Construction of Masonry Chimneys and Fireplaces.”
1) Metal liners shall be constructed of not less than 0.3 mm thick stainless steel.
2) Metal liners referred to in Sentence (1) shall only be used in chimneys serving gas- or oil-burning appliances. (See Appendix A.)
1) Chimney liners shall be installed when the surrounding masonry or concrete is placed.
1) A space not less than 10 mm wide shall be left between a chimney liner and surrounding masonry.
2) The space required in Sentence (1) shall not be filled with mortar.
1) Chimney liners used in chimneys for solid-fuel-burning appliances shall be laid in a full bed of
a)high temperature cement mortar conforming to CAN/CGSB-10.3, “Air Setting Refractory Mortar,” or
b)mortar consisting of 1 part Portland cement to 3 parts sand by volume.
2) Chimney liners used in chimneys for oil- or gas-burning appliances shall be laid in a full bed of mortar consisting of 1 part Portland cement to 3 parts sand by volume.
1) Chimney liners shall extend from a point not less than 200 mm below the lowest flue pipe connection to a point not less than 50 mm or more than 100 mm above the chimney cap.
1) Unit masonry shall conform to Section 9.20.
1) Concrete shall conform to Section 9.3.
1) Footings for masonry chimneys and concrete chimneys shall conform to Section 9.15.
1) A chimney flue shall extend not less than
a)900 mm above the highest point at which the chimney comes in contact with the roof, and
b)600 mm above the highest roof surface or structure within 3 m of the chimney.(See Appendix A.)
1) Except as provided in Sentence (2), chimneys shall be braced in accordance with Subsection 4.3.2. to provide lateral stability under wind loads.
2) A chimney need not be laterally braced provided
a)no horizontal outside dimension is less than 400 mm, and
b)the chimney extends not more than 3.6 m above a roof or the masonry wall of which it forms a part.(See Appendix A.)
1) The top of a chimney shall have a waterproof cap of reinforced concrete, masonry or metal.
2) The cap required in Sentence (1) shall slope from the lining and be provided with a drip not less than 25 mm from the chimney wall.
3) Cast-in-place concrete caps shall be separated from the chimney liner by a bond break and be sealed at that location.
4) Jointed precast concrete or masonry chimney caps shall have flashing installed beneath the cap extending from the liner to the drip edge.
1) A cleanout opening with a metal frame and a tight-fitting metal door shall be installed near the base of the chimney flue.
1) The walls of a masonry chimney shall be built of solid units not less than 75 mm thick.
1) Flue liners in the same chimney shall be separated by not less than 75 mm of masonry or concrete exclusive of liners where clay liners are used, or 90 mm of firebrick where firebrick liners are used.
2) Flue liners referred to in Sentence (1) shall be installed to prevent significant lateral movement.
1) Junctions with adjacent materials shall be adequately flashed to shed water.
1) The clearance between masonry or concrete chimneys and combustible framing shall be not less than
a)50 mm for interior chimneys, and
b)12 mm for exterior chimneys.(See Appendix A.)
2) A clearance of not less than 150 mm shall be provided between a cleanout opening and combustible material.
3) Combustible flooring and subflooring shall have not less than a 12 mm clearance from masonry or concrete chimneys.
1) All spaces between masonry or concrete chimneys and combustible framing shall be sealed top or bottom with noncombustible material.
1) Joists or beams may be supported on masonry walls which enclose chimney flues provided the combustible members are separated from the flue by not less than 290 mm of solid masonry.