Supplied By www.heating spares.co Tel. 0161 620 6677
10
Part No. 5000893
Installation Requirements
Fig. 8
•
Siting the Flue Terminal
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".
The terminal must be positioned such that the
combustion products can disperse freely at all times.
In certain weather conditions a terminal may steam and
positions where this could cause a nuisance should be
avoided.
If a terminal is less than 2m above a balcony, above
ground, or above a flat roof to which people have
access, then a suitable terminal guard must be fitted. A
terminal guard is available (Part No. 205792), this
should be fitted centrally about the terminal.
If the terminal discharges onto a pathway or
passageway, check that the combustion products will
not cause a nuisance and that the terminal will not
obstruct the passageway.
If the flue terminal is fitted within 1 metre of a plastic
gutter, within 500 mm 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 5 mm should be left between
shield and gutter.
IMPORTANT:
It is absolutely ESSENTIAL, to ensure
that products of combustion discharging from the
terminal cannot re-enter the building, or any other
adjacent building, through ventilators, windows, doors,
natural air infiltration, or forced ventilation/air
conditioning. If products of combustion are found to be
re-entering any building, the appliance MUST be
turned OFF IMMEDIATELY.
The distance from a natural draught appliance terminal installed parallel to
a boundary may not be less than 600 mm in accordance with the diagram
below.
Terminal
Assembly
Property Boundary Line
Natural Draught
600 min.
Top View
FLU0006A
N
I
I
G
L
F
M
I
A
A
F
H
J,K
D,E
H
Likely flue positions requiring
a flue terminal guard
B
C
FLU0001A
Natural Draught Balanced Flue
A
a
Directly below an opening, air brick,
opening windows, etc.
B
a
Above an opening, air brick, opening window, etc.
C
a
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.
G
From a vertical drain pipe or soil pipe.
H
From an internal or external corner.
I
Above ground, roof or balcony level.
J
From a surface facing a terminal.
K
From a terminal facing the terminal.
L
From an opening in a
carport
(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.
Terminal Position with Minimum Distance (mm)
For IE, refer to I.S. 813 "Domestic Gas Installation".
1500
300
600
300
300
600
300
600
300
600
600
1200
1500
300
a
In addition, the terminal should not be nearer than 300 mm 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.
