Technical data

INSTALLATION & SERVICING INSTRUCTIONS
Page 8
4.3 Positioning of Balanced Flue Terminal
The boiler is supplied with a standard flue suitable for wall thicknesses from 230mm (9in) to 355mm
(14in). The boiler terminal must be installed such that it is exposed to external air which has a free
passage across it at all times, so that combustion products can disperse freely.
In certain weather conditions the terminal may steam, and positions where this could cause a nuisance
should be avoided.
If the terminal discharges onto a passageway or pathway or over an adjoining property, check that the
combustion products will not cause a nuisance and that the terminals will not obstruct the
passageway. In some areas, local bylaws ask for a minimum height for projections from a wall above a
public footpath.
If the terminal is fitted within 850mm of a plastic gutter, or within 450mm of painted eaves or painted
gutter, an aluminium shield at least 750mm long should be fitted to the underside of the gutter or
painted surface.
If a terminal is fitted less than 2m above a balcony, above ground or above a flat roof to which people
have access, then a suitable terminal guard must be provided. These are available from Tower Flue
Components Ltd, Vale Rise, Tonbridge, Kent, or from Quinnell Barrett Ltd, 884 Old Kent Road, London
SE15, quoting reference type shown in Technical Data Section. The terminal guard should be screwed
to the wall so that it is at least 50mm from all parts of the terminal.
The minimum acceptable spacings from the terminal to any obstructions and ventilation openings are:
(refer to
Figure 2)
TERMINAL POSITION MINIMUM
SPACING
A Directly below an openable window or any other opening, ie
air brick
300mm
B Below gutters, soil pipes or drain pipes 300mm
C Below eaves 300mm
D Below balconies or car port roof 600mm
E From vertical drain pipes and soil pipes 75mm
F From internal or external corners 600mm
G Above ground, roof or balcony level 300mm
H From a surface facing a terminal 600mm
I From a terminal facing a terminal 600mm
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