The guidance below should be followed, to comply with the terminal location specified by:-
BS 5440-1:2000 (Specification for installation and maintenance of flues).
B. Fanned draught
1.
The flue terminal must not be less than 300mm (12") from any external obstructions such as
drainpipes, cables, bushes, eaves, projections or internal corners.
2.
The Building Regulations require the terminal to be 300mm (12") measured vertically, from any
opening, i.e. window, door, ventilator, into the building. These regulations also require that where the
terminal is situated less than 2m (6'6") above a level to which people have access, a flue guard must
be fitted.
1.
Inside the building the heater must be fixed to an external wall, observing the clearance distances in
Fig. 1 so that sufficient access is left for servicing. Note that if the heater is sited too high up the wall,
poor heat distribution will result.
2.
If the heater is fitted below a shelf, a 25mm (1") gap should be left between shelf and heater and the
shelf should not project in front of the heater.
3.
Curtains should clear the heater by 25mm.
4.
Ensure that there is an adequate gas supply available.
5.
Ensure that there is a suitable electrical supply available.
6.
If the heater is to be fitted with a flue longer than 915mm (3ft) ensure that there is adequate clear
space in front of the heater for manoeuvring the assembly of heater and flue.
3
TERMINAL POSITION
MINIMUM DISTANCE
A
-
Directly below, above or to the side of
an openable window or other opening e.g. air brick
300mm
B
-
Below gutters, soil pipes or drain pipes
75mm
C
-
Below eaves
200mm
D
-
Below balconies or car port roof
200mm
E
-
From vertical soil pipes or drain pipes
75mm
F
-
From internal or external corners
300mm
G
-
Above ground, roof or balcony level
300mm
H
-
From a surface facing a terminal
600mm
I
-
From a terminal facing a terminal
1200mm
J
-
From an opening in the car port (e.g. door, window) into dwelling
1200mm
K
-
Vertically from a terminal on the same wall
1500mm
L
-
Horizontally from a terminal on the same wall
300mm
Siting the Heater
Check the following points before deciding the position of the heater in a room.
Building Regulations also require that where the terminal is situated less than 2m (6'6") above a level to which
people have access, a flue guard must be fitted.
