© Baxi Heating UK Ltd 2009
4.0 Site Requirements
11
4.3
Flue Position
(Cont)
WARNING -
The addition of anything that may
interfere with the normal operation of the appliance
without the express written permission from the
manufacturer or his agent could invalidate the
appliance warranty and infringe the GAS SAFETY
(Installation and Use) REGULATIONS.
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.
5. If the outer surface of an outside wall is of combustible
material, it should be protected by fitting the flue trim
provided.
6. Table 2 and Fig. 12 show the positioning of the flue
terminal relative to buildings and other structures.
7. The dimensions of the flue terminal are shown on
page 5.
4.4
Flue Dimensions
1.
Flue extensions are available as optional extras for
installations up to 3 metres.
2.
Vertical flue kits are available up to 4 metres in
length. Vertical twin flue kits are available up to 15
metres in length.
3. The standard telscopic flue is suitable for use with
rear flue lengths between 100 mm and 500 mm.
NOTE:
Maximum flue length when flued to the left
or right is
410 mm - 30, 40, 50 models
355 mm - 60, 70, 80 models
4. Where it is intended to pass the flue through a
combustible wall or timber framed dwelling, reference
should be made to the Institution of Gas Engineers
Publication IGE/UP/7 (Gas Installations in Timber
Framed Housing).
5. If the flue is more than 1 metre long, it is required
that it is supported.
6.
All above dimensions are taken from the
respective faces of the outer case.
Table. 2
Fig. 13
Fig. 12
Maximum lengths for side flues using the standard telescopic flue kit
410mm (30, 40, 50)
410mm (30, 40, 50)
355mm (60, 70, 80)
355mm (60, 70, 80)
Terminal Position with Minimum Distance
(mm)
Aa Directly below an opening, air brick, opening
windows, etc.
300
Ba Above an opening, air brick, opening window etc.
300
Ca Horizontally to an opening, air brick, opening window etc.
300
D
Below gutters, soil pipes or drain pipes.
25
E
Below eaves.
25
F
Below balconies or car port roof.
25
G
From a vertical drain pipe or soil pipe.
25
H
From an internal (i) or external (ii) corner.
(i) 25 (ii) 115
I
Above ground, roof or balcony level.
300
J
From a surface facing a terminal.
600
K
From a terminal facing a terminal.
1200
L
From an opening in carport (e.g. door, window)
into the dwelling.
1200
M
Vertically from a terminal on the same wall.
1500
N
Horizontally from a terminal on the same wall.
300
R
From adjacent wall to flue (vertical only).
1500
S
From an adjacent opening window (vertical only).
300
N
I
I
G
F
M
I
A
A
F
H
J,K
D
E
H
Likely flue positions requiring
a flue terminal guard
C
R
A
I
J,K
I
L
S
B
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.
a In addition, the terminal should be no nearer than 150 mm to an
opening in the building fabric formed for the purpose of accomodating
a built-in element such as a window frame. See BS 5440 Pt. 1.
