Faber Glance, Installation Manual

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11 Calculation of flue system
The possibilities for the lengths of flue pipes and the possible restrictors have been recorded
in a table (see chapter 12 ) This table works with a vertical and a horizontal length.

To define the vertical length all lengths of flue pipes in a vertical direction should
be added up.
-
The roof terminal always counts as 1 metre.

To define the horizontal length all lengths of flue pipes in a horizontal direction
should be added up.
-
every 90° bend in the horizontal part counts as 2 metres.
-
every 45° bend in the horizontal part counts as 1 metre.
-
Turns from vertical to horizontal or vice versa are not reckoned in the
calculation.
-
The wall terminal always counts as 1 metre.
If there is transit under 45° then the real vertical and horizontal lengths should be
calculated.
11.1 Points of particular interest:

The maximum chimney length is 12 metres.

You can never start with a 90° or 45° bend from the appliance.

You should always start with 1 metre vertical if the horizontal transit is more than 1
metre.

You should never start with a cut-down pipe from the appliance.