6
220683B
Note. Detailed recommendations for flue are given in
the current issue of BS5440 Part 1.
2.1 Terminal Position
The minimum acceptable siting dimensions for the
terminal from obstructions, other terminals and
ventilation openings are shown in diagram 2.1.
The terminal must be exposed to the external air, the
position allowing free passage of air across it at all
times.
Car ports or similar extensions of a roof only, or a roof
and one wall, require special consideration with respect
to any openings, doors, vents or windows under the roof.
Care is required to protect the roof if it is made of plastic
sheeting. If the car port consists of a roof and two or
more walls, seek advice from the local gas company
before installing the boiler.
If the terminal is fitted within 600mm below plastic
guttering or painted soffit an aluminium shield 1500mm
long should be fitted immediately beneath the guttering
or eaves. If the terminal is fitted within 450mm below
painted eaves or a painted gutter, an aluminium shield
750mm long should be fitted immediately beneath the
guttering or eaves.
2.2 Terminal Guard
A terminal guard is required if persons could come into
contact with the terminal or the terminal could be subject
to damage.
If a terminal guard is required, it must be positioned to
provide a minimum of 50mm clearance from any part of
the terminal and be central over the terminal.
A suitable guard, reference Type “K3”, can be obtained
from:
Tower Flue Components Ltd.,
Morley Road,
Tonbridge,
Kent.
TN9 1RA
Diagram 2.1
2 F l u e a n d V e n t i l a t i o n
MINIMUM SITING DIMENSIONS
FOR FANNED FLUE
TERMINALS POSITION
A
DIRECTLY BELOW AN OPENABLE
WINDOW, AIR VENT, OR ANY OTHER
VENTILATION OPENING
300
B
BELOW GUTTER, DRAIN/SOIL PIPE
75
C
BELOW EAVES
200
D
BELOW A BALCONY OR CAR PORT
200
E
FROM VERTICAL DRAIN PIPES AND
SOIL PIPES
75
F
FROM INTERNAL OR EXTERNAL
CORNERS
300
G
ABOVE ADJACENT GROUND OR
BALCONY LEVEL
300
H
FROM A SURFACE FACING THE
TERMINAL
600
I
FACING TERMINALS
1200
J
FROM OPENING (DOOR/WINDOW) IN
CAR PORT INTO DWELLING
1200
K
VERTICAL FROM A TERMINAL
1500
L
HORIZONTALLY FROM A TERMINAL
300
MINIMUM
SPACING
in mm
0103M
A
A
F
G
E
A
G
G
G
B,C
B,C
F
F
K
K
K
C
G
L
L
Under Car Port etc.
H,I
J
D
F
K
0161M
