22
Multi Pass Oil Boilers
3 - GENERAL BOILER INFORMATION
Fig. 13 - Clearances for Balanced flues
Notes: *
75 mm with protection.
** 300 mm British Standards
(600 mm recommended for high level balanced flue)
Distances measured to rim of terminal.
Clearances recommended by Grant
Engineering (UK) Limited in accordance with
British Standards and Building Regulations.
A
Below a gutter or sanitary pipework
B
Horizontal from an opening, air brick or window
C
Above ground or balcony level
D
Below eaves or balcony
E
From an internal or external corner
F
From a terminal facing the terminal
G
From a surface facing the terminal
H
Vertical from terminals on the same wall
I
Horizontal from terminals on the same wall
J
Below an opening, air brick, window etc.
K
From vertical sanitary pipework
L
Vertical flue from a wall
M From an oil storage tank
Min. distance (mm)
Terminal position
* 600
600
**300
*600
**300
1200
600
1500
750
600
300
600
1800
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.
