Appendix A: Example calculation
Calculation 1:
Calculating horizontal extension fig. 2a:
Flue length C + E = 1m + 1m 2 m
Elbows D = 2m 2 m
Total horizontal extension 4 m
Measure or calculate effective height (Hvert)
Flue length A 1 m
Roof mounted terminal 1 m
Total effective height 2 m
Calculation 2:
Calculation horizontal extension fig. 2b:
Flue length J + L = 0,5 + 0,5 1 m
Elbows K + M = 2m + 2m 4 m
Terminal 1 m
Total horizontal extension 6 m
Calculation effective height (Hvert)
Flue length H 1 m
Always check if the calculated situation is allowed (see Appendix B: Flue restrictor)
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