10 6 720 607 090
8. Siting the Flue Terminal
See Fig. 8.
8.1 The flue must be installed as specified in BS
5440:Part 1.
8.2 If the terminal discharges onto a pathway or
passageway, check that the combustion products will not
cause a nuisance and that the terminal will not cause an
obstruction.
8.3 If the terminal is fitted within 850 mm of a plastic or
painted gutter or within 450 mm of painted eaves then an
aluminium shield at least 750 mm long should be fitted to
the underside of the gutter or painted surface.
8.4 If a terminal is fitted less than 2 metres above a
surface to which persons have access then a guard must
be fitted.
8.5 The terminal guard must be evenly spaced about the
flue terminal and fixed to the wall using plated screws.
8.6 Under certain weather conditions the terminal may
plume when the appliance is operated. Siting where this
could cause a nuisance should be avoided.
8.7 Take care to ensure that combustion products do not
enter ventilated roof voids by positioning the flue away from
any soffit vents.
Fig. 8 - Siting of the flue terminal
Fig. 7
Dimension Terminal position Minimum distance
A
a
Directly below an opening, air brick, opening windows, etc. 1500 mm
B
a
Above an opening, air brick, opening window, etc. 300 mm
C
a
Horizontally to an opening, air brick, opening window, etc. 600 mm
D Below gutters, soil pipes or drain pipes 300 mm
E Below eaves 300 mm
F Below balconies or car port roof 600 mm
G From a vertical drain pipe or soil pipe 300 mm
H From an internal or external corner 600 mm
I Above ground roof or balcony level 300 mm
J From a surface facing the terminal 600 mm
K From a terminal facing the terminal 600 mm
L From an opening in the car port (e.g. door, window) into the dwelling 1 200 mm
M Vertically from a terminal on the same wall 1 500 mm
N Horizontally from a terminal on the same wall 300 mm
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