13
intelligently applied technology
Fanned 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.
R
From adjacent wall to flue (vertical only).
S
From internal corner to flue (vertical only).
T
Below eaves or balcony (vertical only).
Terminal Position with Minimum Distance (mm)
For IE, refer to I.S. 813 "Domestic Gas Installation".
75
200
200
150
300
300
600
1200
1200
1500
300
600
600
600
Reduced Clearances
This range of boilers has been tested and approved for use with
certain clearances less than those shown above.
Only one of these reductions may be used on a single
installation.
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 or external corner
25
a
In addition, the terminal should not be nearer than 150 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.
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
I
J,K
I
L
T
S
B
Fig. 9
300
300
300
We recommend the following terminal guards:-
Tower Flue Components Ltd.
Tower House, Vale Rise,
Tonbridge, Kent. TN9 1TB
Tel: +44 1732 351680
Fax: +44 1732 354445
www.tfc-group.co.uk
Part no. CGDK3BR - standard flue
Part no. CGDK6BR - when deflector fitted
© Baxi Heating UK Limited 2005
Flue Deflector
We recommend the use of the Flue Deflector Kit (part no. 5111068)
when:-
• Adjacent surfaces close to the flue terminal (e.g. when using
reduced clearances) may need protection from the effects of
condensation.
• The flue terminal is facing an opening in a building directly opposite.
• Products of combustion could discharge directly across a boundary.
1. Push the flue deflector over the terminal end and rotate to 45° to
deflect the plume.
2. The deflector must not face a
wall, face upwards or
downwards, or be directed so
that the combustion products
could cause a nuisance.
3. Secure the deflector to the
terminal with the screw
provided.
Note:
The distance from a fanned draught boiler
terminal installed parallel to a boundary may not be
less than 300 mm, see diagram above. Reduction
down to 25mm is possible but it is recommended
that the flue deflector kit (part no. 5111068) is fitted.
Top View Rear Flue
Top View Side Flue
Terminal
Assembly
Property Boundary Line
Fanned Draught
Fanned Draught
300 min.
25
Flue Deflector
Securing
Screw