15
Grant Vortex Outdoor Module
4 - GENERAL BOILER INFORMATION
Flue terminal locations
4.10
Fig. 7 - Flue terminal
positions
K
D
F
AJ
B
L
G
C
C
I
H
E
Distances measured to rim of terminal.
Clearances recommended by Grant
Engineering (UK) Limited in accordance with
British Standards and Building Regulations.
Notes:1 An opening means an openable
element, such as an openable
window, or a permanent opening
such as a permanently open air vent.
2 Notwithstanding the dimensions
given, a terminal should be at least
300 mm from combustible material,
e.g. a window frame.
3 A way of providing protection of
combustible material would be to fit
a heat shield at least 750 mm wide.
Notes: * 75 mm with protection.
** 300 mm British Standards.
A Below gutters, eaves or balconies (with protection)
B Horizontally from a door, window or air vent
C Above ground, flat roof or balcony level
D Below gutters, eaves or balconies (without protection)
E From an external corner
F From a terminal facing the terminal
G From a surface facing the terminal
H Vertically from a terminal on the same wall
I Horizontally from a terminal on the same wall
J Directly below an opening, air brick, window, etc.
K From a vertical drain pipe or soil pipe
L From an internal corner
*600
600
**300
*600
300
1200
600
1500
750
600
300
300
Terminal position Min. distance
The minimum dimensions for positioning the flue
terminal are shown in Fig. 7.
The terminal should be positioned so as to avoid
products of combustion accumulating in
stagnant pockets around the building or
entering into buildings. Care should also be
taken that the plume from the condensed flue
gases does not cause a nuisance.
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