4 General Requirements
Instructions for installation and servicing aquaPLUS VUI 362-7
10
4.5.3 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. In certain weather conditions a plume of water vapour
may 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, Model K3,
must be provided and fitted (made by Tower Flue
Components, Tonbridge, TN9 1TB).
The flue assembly shall be so placed or shielded as to
prevent ignition or damage to any part of the building.
1) In addition, the terminal should not be 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.
* BS 5440-1 It is recommended that a fanned flue terminal should be
positioned as follows: a) at least 2 m from an opening in a building
directly opposite, and b) so that the products of combustion are not
directed to discharge across a boundary.
Note:
Vertical flues must not terminate within 600 mm
of an openable window, air vent or any other ventilation
opening.
Fig. 4.4: Flue termination
A
BCD
A
G
H, I
F
J
B F
M
L
L
K
K
G
G
F
F
E
A
A
Terminal position for fan-assisted flue
mm
(minimum distance)
A
1)
Directly below an openable, above an opening or
300
horizontal to an opening i.e. air brick, opening
window or other , etc
B
Below gutters, soil pipes or drain pipes
25
C
Below eaves
25
D
Below balconies (below car port roof)
25
E
From vertical drain pipes and soil pipes
25
F
From internal or external corners
25
G
Above ground or balcony level
300
H
From a surface or boundary facing a terminal
600*
I
From a terminal facing a terminal
1200
J
From an opening in a car port (e.g. door, window)
1200
into a dweling
K
Vertically from a terminal on the same wall
1500
L
Horizontally from a terminal on the same wall
300
M
Distance from adjacent wall for vertical Flue
500
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