10
Ø 60/100 mm
F
IG
. 2.6
The boiler is designed to be connected to a coaxial flue discharge system.
2.10 F
LUE
C
ONNECTIONS
F
LUE
S
YSTEM
The provision for satisfactory flue termination must be made as described in
BS 5440-1, for IE recommendations I.S.813.
The appliance must be installed so that the flue terminal is exposed to
outdoor 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.
If the terminal is fitted within 1 metre of a plastic gutter, within 500mm of 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
The minimum acceptable spacing from the terminal to obstructions and
ventilation openings are specified in
F
IG
. 2.5
.
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
F
IG
. 2.5
