Minimum dimensions of flue wall-terminal positions
Wall-terminal position
A * Directly below an opening, airbrick,
window etc.
B
* Above an opening, airbrick, window
etc.
C * Horizontally to an opening, airbrick,
window etc.
D Below a gutter or sanitary tube if
combustible material protected.
E
Below eaves.
F
Below balconies or open roofed out
buildings.
G From a vertical drain or soil tube.
H From an internal or external corner.
I
Above ground or balcony level.
J
From a surface facing the wall-terminal.
K
From another wall-terminal facing the
wall-terminal.
L
From an opening in the car port into a
dwelling.
M Vertically from a wall-terminal on the
same wall.
N Horizontally from a wall-terminal on the
same wall.
O From a wall on which the wall-terminal
is mounted.
P
From a vertical structure on the roof.
Q Above intersection with roof.
Notes: N/A = NOT APPLICAIABLE * In addition, the wall-terminal should not be nearer than 150mm (fan draught) or 300mm (natural draught) to an
opening in the building fabric formed for the purpose of accommodating a built-in element such as a window frame. Separation distances are linked to the
rated heat inputs as shown.
INSTRUCTIONS FOR INSTALLATION
Balance flues
room sealed
Natural
draught
0-7kW
300 mm
>7-14kW
600 mm
>14-32kW
1500 mm
>32-70kW
2000 mm
0-7kW
300 mm
>7-14kW
300 mm
>14-32kW
300 mm
>32-70kW
300 mm
0-7kW
300 mm
>7-14kW
400 mm
>14-32kW
600 mm
>32-70kW
600 mm
300 mm
300 mm
600 mm
300 mm
600 mm
300 mm
600 mm
600 mm
1200 mm
1500 mm
300 mm
N/A
N/A
N/A
7
Open flues
Fanned
Natural
draught
draught
300 mm
Not allowed
300 mm
Not allowed
300 mm
Not allowed
75 mm
Not allowed
200 mm
Not allowed
200 mm
Not allowed
150 mm
Not allowed
300 mm
Not allowed
300 mm
Not allowed
600 mm
N/A
1200 mm
N/A
1200 mm
N/A
1500 mm
N/A
300 mm
N/A
N/A
N/A
N/A
600 mm
N/A
600 mm
Kamara
Fanned
draught
300 mm
300 mm
300 mm
75 mm
200 mm
200 mm
150 mm
200 mm
300 mm
600 mm
1200 mm
1200 mm
1500 mm
300 mm
50 mm
N/A
150 mm