Division B
Acceptable Solutions
Part 9 — Housing and Small Buildings
Section 9.21. Masonry and Concrete Chimneys and Flues
9.21.1. General
9.21.1.1. Application
9.21.1.2. Chimney or Flue Pipe Walls
9.21.2. Chimney Flues
9.21.2.1. Chimney Flue Limitations
9.21.2.2. Connections of More Than One Appliance
9.21.2.3. Inclined Chimney Flues
9.21.2.4. Size of Chimney Flues
9.21.2.5. Fireplace Chimneys
Table 9.21.2.5.A Diameter of Round Flues for Fireplace Chimneys Forming part of Sentence 9.21.2.5.(1) | ||||||||
Fireplace Opening, m^{2} |
Chimney Height, m |
|||||||
3.0 to 4.5 |
> 4.5 to 5.9 |
> 5.9 to 8.9 |
> 8.9 to 12 |
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Flue Diameter, mm |
||||||||
min. | max. | min. | max. | min. | max. | min. | max. | |
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 9.21.2.5.B Rectangular Flue Sizes for Fireplace Chimneys Forming part of Sentence 9.21.2.5.(1) | ||||||||
Fireplace Opening, m^{2} |
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 |
||||||||
min. | max. | min. | max. | min. | max. | min. | max. | |
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 |