Technical information

22
Fig. 11.1
Fig. 11.2
In addition, it is also possible to use a split system
by fitting a special adapter to the flue discharge
collar and using one of the apertures for the air
vent intake located on the top part of the
combustion chamber (Fig. 11.3)
See Section 11.6.
136
NOTE:THE FLUE MUST TERMINAL MUST
BE AT LEAST
2 METRES FROM ANY
OPENING IN A BUILDING OPPOSITE AND
SHOULD
NOT
DISCHARGE ACROSS
BOUNDARIES
. IN
ADDTION
TO
THIS
, THE
FLUE MUST NOT TERMINATE IN A PLACE
LIKELY TO CAUSE NUISANCE
.
T ERMINAL P OSITION mm
A - Directly above or below an openable window
or other opening 300
B - Below gutters, solid pipes or drain pipes 75
C - Below eaves 200
D - Below balconies or car-port roof 200
E - From vertical drain pipes and soil pipes 150
F - From internal or external corners 300
G - Above ground or balcony level 300
H - From a surface facing a terminal 600
I - From a terminal facing a terminal 1200
J - From an opening in the car port
(e.g. door, window) into dwelling 1200
K - Vertically from a terminal in the same wall 1500
L - Horizontally from a terminal in the same wall 300
M - Horizontally from an opening window 300
N - Fixed by vertical flue terminal
11. Connecting the Flue
Fig.11.3
11.1 Flue Connections
Flue System
The provision for satisfactory flue termination must be made as
described in BS 5440-1, for IE recommendations I.S.813.
T
he appliance must be installed so that the flue terminal is exposed to
o
utdoor air, consideration must be given to terminal discharges onto a
pathway or passageway, check that the combustion discharges will not
cause a nuisance and that the terminal will not obstruct the
passageway.
The terminal must not discharge into another room or space such as
an outhouse or lean-to.
It is important that the position of the terminal allows a free passage
of air across it at all times.
I
f the terminal is fitted within 1 metre of a plastic gutter, within 500mm
o
f a painted eave or a painted gutter, an aluminium shield of at least
1 metre long should be fitted to the underside of the gutter or painted
surface. An air space of 5mm should be left between shield and
gutter.
The terminal should be located with due regard for the damage or
discolouration that might occur on buildings in the vicinity.
In cold or humid weather water vapour may condense on leaving the
flue terminal. The effect of such “steaming” must be considered.
If the terminal is less than 2 metres above a balcony, above ground
or above a flat roof to which people have access, then a suitable
terminal guard must be fitted. When ordering a terminal guard, quote
the appliance model number.
A suitable terminal guard is available from:
TOWER FLUE COMPONENTS
Morley Road
Tonbridge
Kent TN9 1RA