HAMWORTHY HEATING LTD
12
FLEET W series
500001211/F
4.3 Flue Terminal Locations
The diagram below details the minimum spacing requirements for flue terminals from other building features when
using the concentric and twin duct flue systems (C13, C33, C53 & B23)
It is recommended that air supply inlet terminals are positioned no closer than 300mm to any flue terminal when
using C53 twin pipe flue systems. Air supply inlets should preferably be positioned lower than flue terminals.
Figure 4.3.2
Dim Terminal Position
Min Distance
(mm)
A Directly below an opening, air brick, opening window etc 300
B Above an opening, air brick, opening window etc 300
C Horizontally to an opening, air brick, opening window etc 300
D Below gutters, soil pipes or drain pipes 75
E Below eaves 200
F Below balconies or car port roof 200
G From a vertical drain pipe or soil pipe 150
H From an internal or external corner 300
I Above ground roof or balcony level 300
J From a surface facing the terminal 600
K From a terminal facing the terminal 1200
L From an opening in the car port (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
O From the wall on which the terminal is mounted N/A
P From a vertical structure on the roof N/A
Q Above intersection with roof N/A
Note: Flue Installation should comply with BS5440 Part 1
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