Notes to Table 9.20.16.1.:
9.21.2.5. Fireplace Chimneys (1) The size of a chimney flue
serving a masonry fireplace shall be within the allowable range specified in Table 9.21.2.5.A. or Table 9.21.2.5.B. Table 9.21.2.5.A.   Diameter of Round Flues for Fireplace Chimneys Forming Part of Sentence 9.21.2.5.(1) Item   Column 1   Column 2   Column 3   Column 4   Column 5   Column 6   Column 7   Column 8   Column 9 

      Fireplace Opening, m²   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                         

          Min.   Max.   Min.   Max.   Min.   Max.   Min.   Max. 

  1.   Up to 0.150   110   170   100   160   90   150   90   150 

  2.   0.151 to 0.250   150   210   130   190   130   190   120   180 

  3.   0.251 to 0.350   180   240   160   220   150   210   140   200 

  4.   0.351 to 0.500   220   280   200   260   190   250   170   230 

  5.   0.501 to 0.650   260   320   230   290   220   280   200   260 

  6.   0.651 to 0.800   290   350   260   320   240   300   220   280 

  7.   0.801 to 1.00   330   390   290   350   270   330   250   310 

  8.   1.01 to 1.20   360   420   320   380   300   360   270   330 

  9.   1.21 to 1.40   390   450   350   410   330   390   300   360 

  10.   1.41 to 1.60   420   480   380   440   350   410   320   380 

  11.   1.61 to 1.80   —   —   400   460   370   430   340   400 

  12.   1.81 to 2.00   —   —   —   —   400   460   360   420 

  13.   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) Item   Column 1   Column 2   Column 3   Column 4   Column 5   Column 6   Column 7   Column 8   Column 9 

      Fireplace Opening, m²   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. 

  1.   Up to 0.150   200 × 200   200 × 200   100 × 200   100 × 200   100 × 200   100 × 200   100 × 200   100 × 200 

  2.   0.151 to 0.250   200 × 200   200 × 200   200 × 200   200 × 200   200 × 200   200 × 200   200 × 200   200 × 200 

  3.   0.251 to 0.350   200 × 300   200 × 300   200 × 200   200 × 300   200 × 200   200 × 200   200 × 200   200 × 200 

  4.   0.351 to 0.500   300 × 300   300 × 300   200 × 300   200 × 300   200 × 300   200 × 300   200 × 200   200 × 300 

  5.   0.501 to 0.650   300 × 300   300 × 400   300 × 300   300 × 300   300 × 300   300 × 300   200 × 300   200 × 300 

  6.   0.651 to 0.800   300 × 400   300 × 400   300 × 300   300 × 400   300 × 300   300 × 300   300 × 300   300 × 300 

  7.   0.801 to 1.00   400 × 400   400 × 400   300 × 400   300 × 400   300 × 400   300 × 400   300 × 300   300 × 300 

  8.   1.01 to 1.20   400 × 400   400 × 400   400 × 400   400 × 400   300 × 400   300 × 400   300 × 400   300 × 400 

  9.   1.21 to 1.40   —   —   400 × 400   400 × 400   400 × 400   400 × 400   300 × 400   300 × 400 

  10   1.41 to 1.60   —   —   —   —   400 × 400   400 × 400   400 × 400   400 × 400 

  11.   1.61 to 1.80   —   —   —   —   —   —   400 × 400   400 × 400 

  12.   1.81 to 2.00   —   —   —   —   —   —   400 × 400   400 × 400