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Fig. 5
Fig. 7
(side view). Angle of drop
shown exaggerated.
Terminal Position with Minimum Distance
A* Directly below an openable window or other opening, e.g. an air brick.
B* Below gutters.
C* Below eaves, soil pipes or drain pipes.
D Below balconies or car port roof
E From vertical drain pipes and soil pipes.
F From internal or external corners.
G Above ground, roof or balcony level.
H From a surface facing a terminal.
I
From a terminal facing a terminal.
J
Vertically from a terminal on the same wall.
K Horizontally from a terminal on the same wall.
L
For an opening in a car port (e.g. door, window) into a dwelling.
*In addition, the terminal should not be nearer than 300mm to an opening in the
building fabric formed for the purpose of accommodating a built-in element such
as a window frame or door frame (Fig. 8).
Fig. 6
(mm)
300
300
300
600
300
600
300
600
600
1500
300
1200
Fig. 8
Installer Guide
3.0 Site Requirements
3.3
Flue Position
1. The siting of the balanced flue terminal must
meet the following conditions:
a. Where the flue terminal of the appliance is
beneath any opening (that is to say, any part of a
window capable of being opened, or any
ventilation inlet or similar opening) no part of the
terminal shall be within 300mm (1 ft), measured
vertically from the bottom of the opening.
b. Where the flue terminal of the appliance is
less than 2m (6 ft) above the level of any ground,
balcony, flat roof or place to which any person
has access and which adjoins the wall in which
the flue terminal is situated, the terminal shall be
protected by a guard.
c. The guard must be screwed to the wall over
the flue terminal and be at least 50mm (2 in)
clear of any part of the terminal. A suitable guard
is available direct from the GDC Group service
dept., Part No. 080266 (Fig. 6).
d. Not within 300mm (1 ft) of ground level.
2. Fig. 4 shows the positioning of the flue
terminal relative to buildings and other
structures.
3. If the outer face of the outside wall is of
combustible material (timber, etc.) a metal or
other non-combustible material plate should be
fitted round the flue terminal so that it extends
not less than 50mm (2 in) around the terminal. A
179mm (7 in) square or a 230mm (9 in) diameter
circular plate will meet the requirement.
4. The flue should run horizontally, or with a
slight drop to the terminal, in order to prevent
rain entry (Fig. 7).
© GDC Group Ltd. 2012
9
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