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The installation of the flue exhaust and combustion air
intake system must be calculated and made by sufficiently
qualified and authorised staff. On designing and mounting the
installation, all national and local regulations, standards and
stipulations applicable at the time of installation must be taken
into account.
The minimum distances between the flue exhaust terminal and
the building elements must comply with those shown in the
following table:
G
F
D
J
E
L
B
B,C
F
M
G
A
F F
A
A
G
N
K
Terminal Position
From openings (e.g. doors, windows,
A
ventilation grilles)
B
Under a cornice
C
Under a gutter or drainpipes
D
Under a balcony or car port roof
E
From vertical drainpipes
From internal and external corners of
F
the building
G
From the ground, roof and balconies
H
When no other outlet is installed
From the wall with the pipe to the front
I
wall
From openings (e.g. doors, windows)
J
under the roof
K
V
r e
c i t
l l a
f y
o r
m
a
l f
e u
L
Horizontally from a flue
Vertical flue clearance (Non
M
combustible building material)
N
From a front surface with openings
For vertical ducts, the outlet must be at least 60 cm
Note
from any opening.
The dimensions (B, C, D, and E) may be reduced to
25 mm, as long as the flue terminal is extended to
clear any overhangs.
Minimum
Distance (mm)
300
200
75
200
150
300
300
600
1200
1200
5 1
00
300
500
2000
Installing the Water Heater
29
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