7.0 Site Requirements
14
7.9
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.
Recommendations for flues are given in BS 5440
Pt.1.
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. Take into consideration the effect the plume of
vapour may have on neighbours when siting the
flue.
5. If a terminal is less than 2 metres (78
3
/
4
in)
above a balcony, above ground or above a flat
roof to which people have access, then a suitable
terminal guard must be provided.
Fig. 17
Fig. 16
Terminal Position with Minimum Distance (Fig. 17)
(mm)
A
Directly below an openable window, air vent or any other
ventilation opening.
300
B
Below gutter, drain/soil pipe.
150
C
Below eaves.
200
D
Below a balcony/car port roof.
200
E
From vertical drain pipes and soil pipes.
150
F
From internal or external corners.
300
G
Above adjacent ground or balcony level.
300
H
From a surface facing a terminal.
600
I
Facing a terminals.
1200
J
From opening (door/window) in carport into dwelling.
1200
K
Vertically from a terminal on the same wall.
1500
L
Horizontally from a terminal on the same wall.
300
M Above an opening, air brick, opening window etc.
300
N
Horizontally to an opening, air brick, opening window etc.
300
Vertical Flues
- minimum distance to edge of terminal
mm
P
Above the roof level (to base of terminal).
300
Q
From adjacent wall to flue.
300
R
From adjacent opening window.
1000
S
From another terminal.
600
Q
R
P
S
L
G
G
E
J
D
K
G
A
A
D
F
H,I
B,C
F
Likely flue positions requiring
a flue terminal guard
M
N
300 min
Terminal
Assembly
Top View Rear Flue
Property Boundary Line
NOTE:
The distance from a fanned draught
appliance terminal installed parallel to a
boundary may not be less than 300mm in
accordance with the diagram below
