13
installation
Flue Connections
Flue System
The provision for satisfactory fl ue termination must be
made in accordance with BS 5440-1.
The appliance must be installed so that the fl ue terminal is
exposed to outside air.
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.
The terminal should be located with due regard for the
damage or discolouration that might occur on buildings in
the vicinity and consideration must be given to adjacent
boundaries.
In cold or humid weather water vapour may condense on
leaving the fl ue terminal. The eff ect of such “pluming” must
be considered.
If the terminal is less than 2 metres above a balcony,
above ground or above a fl at roof to which people have
access, then a suitable terminal guard must be fi tted. When
ordering a terminal guard, quote the appliance model
number.
The minimum acceptable spacing from the terminal to
obstructions and ventilation openings are specifi ed in Fig.
11.
TERMINAL POSITION
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 fl ue terminal
NOTE: THE FLUE MUST NOT TERMINATE IN A PLACE
LIKELY TO CAUSE NUISANCE.
Fig. 11
