L
L
K
K
F
F
G
A
M
E
J
F
HI
D
G
A
B,C
See Fig. 4
5.1
The flue must be installed as specified in BS 5440:Part 1and
the building regulations.
NOTE:
Installations coming under the jurisdiction of Building
Control should adhere to the increased clearances.
5.2
The terminal must not cause an obstruction nor the
discharge cause a nuisance.
5.3
If the terminal is fitted within 1000mm of a plastic or painted
gutter or within 500mm of painted eaves then an aluminium
shield at least 1000mm long should be fitted to the underside of
the gutter or painted surface.
5.4
If a terminal is fitted less than 2 metres above a surface to
which people have access then a guard must be fitted. See
Section 2.9.
5.5
The terminal guard must be evenly spaced about the flue
terminal and fixed to the wall using plated screws.
5.6
In certain weather conditions a terminal may steam and
siting where this could cause a nuisance should be avoided.
5.7
Take care to ensure that combustion products do not enter
ventilated roof voids.
6.1
Installations in cupboards or compartments require
permanent vents for cooling purposes, one at high level and one
at low level, either direct to outside air or to a room. Both vents
must pass to the same room or be on the same wall to outside
air.
6.2
Refer to BS 6798 and BS 5440:2 for additional information.
6.3
There must be sufficient clearance around the appliance to
allow proper circulation of ventilation air. The clearances
required for Installation and Servicing will normally be adequate
for ventilation.
6.4
The minimum free areas required are given below.
6.5
Refer to BS 6798 and BS 5440:2 for additional information.
6. Air Supply
5. Siting The Flue Terminal
7
POSITION OF
AIR FROM
AIR DIRECT
AIR VENTS
THE ROOM
FROM OUTSIDE
HIGH LEVEL
270 cm
2
135 cm
2
LOW LEVEL
540 cm
2
270 cm
2
TERMINAL POSITION
MIN. DISTANCE
A– Directly below an opening, air brick,
window etc.
1500mm (60 in.)
A1– Above an opening, air brick,
window etc.
300mm (12 in.)
A2– Horizontaly to an opening, air brick,
window etc.
600mm (60 in.)
B– Below gutters, soil pipes or drain pipes.
300 mm (12 in.)
C– Below eaves.
300 mm (12 in.)
D– Below balconies or car port roof.
600 mm (24 in.)
E– From vertical drain pipes and soil pipes.
75 mm (3 in.)
F– From internal or external corners.
600 mm (24 in.)
Fig. 4. Siting of the flue terminal.
TERMINAL POSITION
MIN. DISTANCE
G– Above ground, roof or balcony level.
300 mm (12 in.)
H– From a surface facing a terminal.
600 mm (24 in.)
I–
From a terminal facing a terminal
600 mm (24 in.)
J–
From an opening in a car port (e.g. door
window) into dwelling.
1200 mm (47 in.)
K– Vertically from a terminal on the same
wall.
1500 mm (59 in.)
L– Horizontally from a terminal on the same
wall.
300 mm (12 in.)
M– From door, window or air vent (achieve
where possible).
300 mm (12 in.)
A1
A2
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