K
G
D
J
Fig. 11
Likely flue positions requiring
a flue terminal guard
Terminal Position with Minimum Distance (Fig. 11)
A* Directly below an openable window, air vent or any other
ventilation opening.
B
Below gutter, drain/soil pipe.
C
Below eaves.
D Below a balcony/car port roof.
E
From vertical drain pipes and soil pipes.
F
From internal or external corners.
G Above adjacent ground or balcony level.
H From a surface facing a terminal.
I
Facing a terminals.
J
From opening (door/window) in carport into dwelling.
K
Vertically from a terminal on the same wall.
L
Horizontally from a terminal on the same wall.
M* Above an opening, air brick, opening window etc.
N* Horizontally to an opening, air brick, opening window etc.
* In addition, the terminal should be no nearer than 150mm to an opening
in the building fabric formed for the purpose of accommodating a built-in
element such as a window frame. See BS 5440 Pt. 1.
L
B,C
M
A
E
G
7.0 Site Requirements
7.7
Flue
NOTE: Due to the nature of the boiler a plume of water
vapour will be discharged from the flue. This should be
taken into account when siting the flue terminal.
1. The following guidelines indicate the general requirements
for siting balanced flue terminals. For GB recommendations
are given in BS 5440 Pt 1. For IE recommendations are given
in the current edition of I.S. 813 "Domestic Gas
Installations".
2. If the terminal discharges onto a pathway or passageway,
check that combustion products will not cause a nuisance
and that the terminal will not obstruct the passageway.
3. If a 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 provided.
N
G
D
H,I
A
F
F
(mm)
300
25
Terminal
25
Assembly
25
25
25
300
600
1200
1200
1500
Top View Rear Flue
300
300
300
Fig. 12
300 min
Property Boundary Line
19