10.6 Flue Length
The maximum permissable horizontal ue length is 8 metres
plus the ue terminal assembly, this can be achieved by use
of the accessories, see diagram 10.13.
However should additional 90º or 2 x 45º elbows be used then
the length MUST be reduced by 1metre.
The diagram 10.11 shows the length achievable by using the
kit A2043400.
When extension pipes are used the ue system must be
designed to have a continuous fall to the boiler of at least 2.5º
44mm/metre to allow condensate to run back into the boiler
and out via the condensate drain.
The ue can be installed from inside the building, when
access to the outside wall face is not practicable.
10 Standard Flue - Length, Preparation and Installation
Diagram 10.11
14015
14006
Standard Horizontal Flue
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