*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 (See figure 6).
** The reference to external corners does not apply to building protrusions not
exceeding 450mm, such as disused chimneys on external walls.
Page 17
© GDC Group Ltd. 2014
INSTALLER GUIDE
Key Terminal position
Minimum
distance
(mm)
A* Directly below an opening, air brick, opening window etc. 300mm
B* Above an opening, air brick, opening window etc. 300mm
C* Horizontally to an opening, air brick, opening window etc. 300mm
D Below gutters, soil pipes or drain pipes. 300mm
E Below eaves. 300mm
F Below balconies or car port roof. 600mm
G From a vertical drain pipe or soil pipe. 300mm
H** From an internal or external corner. 600mm
I Above ground, roof or balcony level. 300mm
J From a surface facing the terminal. 600mm
K From a terminal facing the terminal. 600mm
L From an opening in a car port (e.g. door, window) into dwelling. 1200mm
M Vertically from a terminal on the same wall. 1500mm
N Horizontally from a terminal on the same wall. 300mm
Figure 5.
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