
7
221138C
4783
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
MINIMUM SITING DIMENSIONS FOR
FANNED FLUE TERMINALS
POSITION
mm
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 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
2816
Diagram 3.6
Low Vent
248cm
2
38in
2
124cm
2
19in
2
High Vent
248cm
2
38in
2
124cm
2
19in
2
TABLE 2 75e
Position
Air from
Air Direct
of
Room or
from
Air Vent
Internal space
Outside
Low Vent
264cm
2
40in
2
132cm
2
20in
2
High Vent
264cm
2
40in
2
132cm
2
20in
2
TABLE 2 80e
Position
Air from
Air Direct
of
Room or
from
Air Vent
Internal space
Outside
3 F l u e a n d V e n t i l a t i o n
3.4 Timber Frame Buildings
If the boiler is to be installed in a timber frame building
seek advice from the local gas undertaking or from
Hepworth Heating Ltd.
3.5 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.
The guard should be similar to that shown in diagram 3.6
and can be bought from:
Tower Flue Components Ltd.
Morley Road
Tonbridge
Kent
TN9 1RA
their type K3
3.6 Room Ventilation
Ventilation must be provided in accordance with the
rules in force in the countries of destination. The boiler
is room sealed, so where the boiler is fitted in a room or
space, a permanent air vent is not required.
3.7 Cupboard/Compartment Ventilation
If the boiler is to be fitted in a cupboard or compartment,
permanent high and low level air vents must be provided
for ventilation. The vents must have at least the
effective areas shown in Table 2.