Chimney heights for solid fuel appliances

Diagram 1 Flue outlets

1a

Solid fuel applicances diagram 1: flue outlets

1b

Solid fuel applicances diagram 1: flue outlets 1a

Flue outlet should terminate outside the shaded area.

Table to determine chimney height for solid fuel appliances
Roof pitch (degrees) Chimney height (metres)
<10 see 1b
10 0.60
11 0.60
12 0.60
13 0.60
14 0.60
15 0.62
16 0.66
17 0.70
18 0.75
19 0.79
20 0.84
21 0.88
22 0.93
23 0.98
24 1.02
25 1.07
26 1.12
27 1.17
28 1.22
29 1.27
30 1.33
31 1.38
32 1.44
33 1.49
34 1.55
35 1.61
36 1.67
37 1.73
38 1.80
39 1.86
40 1.93
41 2.00
42 2.07*
43 2.14*
44 2.22*
45 2.30*

* Check masonry for stability.

Contact details:

Last updated: Wednesday, 5 October, 2022.