Standard 125 Mm Air/Flue Gas Duct; Flue Termination - Vaillant ecotec plus Installation And Maintenance Instructions Manual

3 Safety instructions and regulations
3.3.3

Standard 125 mm air/flue gas duct

A concentric air/flue gas duct which has an outside
diameter of 125 mm and can be extended up to a length
of 21 m is available.
You can also get a vertical system. For more information
refer to the installation manual for the
air/flue gas duct.
Fig. 3.1 Item No. 303 209
Fig. 3.2 Item No. 303 200
3.3.2

Flue termination

The following details refer to both flue systems.
a. The terminal must be positioned such that the
products of combustion can disperse freely at all
times.
b. A plume of water vapour will sometimes be visible
from the flue terminal. Positions where this could be a
nuisance should be avoided.
c. If the terminal is fitted less than 2 m above a balcony,
above ground or above a flat roof to which people
have access then a suitable terminal guard must be
provided and fitted (contact Tower Flue Components,
Tonbridge, TN9 1TB).
h Note!
Vertical flues must not terminate within
600 mm of an openable window, air vent or any
other ventilation terminal.
8
The flue system shall be so placed or shielded as to
prevent ignition or damage to any part of the building.
Location
Directly below an opening, air brick, opening win-
A
dows, etc.
B Above an opening, air brick, opening window, etc. 300 mm
Horizontally to an opening, air brick, opening
C
window, etc.
Below temperature-sensitive building components
D
e.g. plastic gutters, soil pipes or drain pipes
E Below eaves
F Below balconies or car port roof
G From a vertical drain pipe or soil pipe
H From an internal or external corner
I Above ground, roof or balcony level
J From a surface facing the terminal
K From a terminal facing the terminal
From an opening in the car port (e.g. door, win-
L
dow) into the dwelling
M Vertically from a terminal on the same wall
N Horizontally from a terminal on the same wall
O From the wall on which the terminal is mounted
P From a vertical structure on the roof
Q Above intersection with roof
Table 3.1 Position of the termination in a fan-assisted air/flue
gas duct
Note!
h
In addition, the terminal should not be nearer
than 300 mm to an opening in the building
fabric formed for the purpose of accommodating
a built–in element such as a window.
BS 5440–1 It is recommended that the fanned flue
terminal should be positioned as follows:
a) at least 2 m from an opening in the building directly
opposite, and
b) so that the products of combustion are not straightly
directed to discharge across a boundary.
1) Dimensions D, E and F:
These clearances may be reduced to 25 mm without
affecting the performance of the boiler. In order to
ensure that the condensate plume does not affect
adjacent surfaces the terminal should be extended as
shown in Fig. 3.3.
Installation and maintenance instructions ecoTEC plus 0020214490_00
Minimum
dimensions
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
N/A
N/A
300 mm