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3.8.1
Siting the Flue Terminal
The flue must be installed in accordance with
BS 5440:1 and the Building Regulations. Flue terminals
in carports and under balconies are to be avoided.
The terminal must be positioned so that it does not
cause an obstruction nor the combustion products a
nuisance. See fig. 15 and table 9.
The terminal will, at times, give out a plume of water
vapour and consideration must be given to this when
choosing a terminal position. Keep clear of security
boundary
H
J
Fig. 15
Minimum dimensions of flue terminal positions (all types) (see fig. 15)
Dimension
Terminal Position (kW input expressed in net)
1)
A
Directly below an opening, air brick, opening windows, etc.
1)
B
Above an opening, air brick, opening window, etc.
1)
C
Horizontally to an opening, air brick, opening window, etc.
D
Below gutters, soil pipes or drain pipes
E
Below eaves
F
Below balconies or car port roof (lowest point)
G
From a vertical drain pipe or soil pipe
H
From an internal or external corner or to a boundary alongside the
terminal
I
Above ground roof or balcony level
J
From a surface or boundary facing the terminal
K
From a terminal facing the terminal
L
From an opening in the car port (e. g. door, window) into the dwelling
M
Vertically from a terminal on the same wall
N
Horizontally from a terminal on the same wall
P
From a vertical structure on the roof
Q
Above intersection with roof
Table 9
1)
In addition, the terminal should not be nearer than 150 mm (fanned draught) to an opening in the building fabric formed for the pur-
pose of accommodating a built-in element such as a window frame.
6 720 611 449 GB (03.11)
Q
Q
I
B
F
A
L
G
I
lighting, activated by passive infra-red sensing heads.
If the terminal is less than 2 m above a surface to which
people have access then a guard must be fitted. The
guard must be evenly spaced about the terminal with a
space of 50 mm in each direction and fixed with plated
screws.
A guard Type K6 for the standard horizontal flue, can be
obtained from Tower Flue Components, Vale Rise, Ton-
bridge TN9 1TB.
P
D,E
C
H
H
Balanced flues room sealed: Fanned draught
300 mm
300 mm
300 mm
75 mm
200 mm
Not recommended
75 mm
300 mm
300 mm
1200 mm
2000 mm
Not recommended
1500mm
300 mm
500 mm
300 mm
Installation
Q
N
M
K
17
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