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2.6.3. Peripheral Distances of Flue Output Connections
In order to position the flue set output pipe
300 min
Terminal
Assembly
Top View Rear Flue
Property Boundary Line
*
N
I
I
G
F
M
I
A
A
F
H
J,K
D
E
H
C
R
A
I
J,K
I
L
S
B
T
U
Likely flue positions requiring
a flue terminal guard
Figure 32
Environmental locations of flue
Terminal Position with Minimum
Distance
(mm)
A
1
Directly below an opening, air brick,
opening windows, etc.
300
B
1
Above an opening, air brick,
opening window etc.
300
C
1
Horizontally to an opening, air
brick, opening window etc.
300
D
2
Below gutters, soil pipes or drain
pipes.
25 (75)
E
2
Below eaves.
25 (200)
F
2
Below balconies or car port roof.
25 (200)
G
2
From a vertical drain pipe or soil
pipe.
25 (150)
H
2
From an internal or external corner.
25 (300)
I
Above ground, roof or balcony
level.
300
J
From a surface or boundary line
facing a terminal.
600
Terminal Position with Minimum
Distance
(mm)
K
From a terminal facing a terminal
(Horizontal flue).
From a terminal facing a terminal
(Vertical flue).
1200
600
L
From an opening in carport (e.g.
door, window)
into the dwelling.
1200
M
Vertically from a terminal on the
same wall.
1500
N
Horizontally from a terminal on the
same wall.
300
R
From adjacent wall to flue (vertical
only).
300
S
From an adjacent opening window
(vertical only).
1000
T
Adjacent to windows or openings
on pitched and flat roofs
600
U
Below windows or openings on
pitched roofs
2000
1 In addition, the terminal should be no nearer than 150 mm to an opening in the building fabric formed for the purpose of
accommodating a built-in element such as a window frame.
2 Only ONE 25mm clearance is allowed per installation. If one of the dimensions D, E, F, G or H is 25mm then the remainder MUST
be as shown in brackets, in accordance with B.S.5440-1.
NOTE:
The distance
from a fanned draught
appliance terminal
installed parallel to a
boundary may not be
less than 300 mm in
accordance with the
diagram below
2.6.4. Installation with Horizontal Flue Sets
Connecting Horizontal Concentric Flue Set to the Combi
Boiler, (original diameter DN 60/100 mm)
Since your combi boiler is hermetic model, it takes the used
air from exterior and discharges exhaust gases created as
the result of burning through the same flue group. In order
to prevent emission of excessively harmful exhaust gases,
flue usage and installation is very important, therefore
warnings should be taken into consideration when flue
connections are being performed.
