200646_01
4
the current edition of I.S.813 ‘Domestic Gas Installations’ and the current Building
Regulations.
In addition to the Standards detailed above the installation must comply with the current
IEE wiring regulations.
2
THE HEARTH.
The appliance must be fitted with a non-combustible hearth having a minimum thickness of
12mm (½"). The hearth must extend at least 300mm (12") in front and a minimum of
150mm (6") either side of any naked flame or incandescent radiant source. The periphery
of the hearth must be at least 50mm (2") above the floor level. (Under BS 5871, Part 2, the
installation of a fender of 50mm (2") high will satisfy this requirement.)
3
It is recommended that decorative frets have a minimum of 30cm
2
(5 sq. in) of free air
space through the ash pan cover.
4
VENTILATION.
Subject to a satisfactory spillage test, there is no requirement for purpose made ventilation
into the room containing the appliance. (See Section 14)
5
FLUE TERMINAL POSITION
The minimum distances permissible from the flue terminal to obstructions and ventilation
openings are shown in Figure 1.
DIMENSION
TERMINAL POSITION
MINIMUM
DISTANCE
A
Directly below an opening, air brick or window, etc...
300mm
B
Above an opening, air brick, opening windows, etc.
300mm
C
Horizontally to an opening, air brick, opening windows, etc.
300mm
D
Below gutters, soil pipes or drain pipes
75mm
E
Below eaves
200mm
F
Below balconies or car port roof.
200mm
G
From a vertical drainpipe or soil pipe.
150mm
H
From an internal or external corner.
200mm
I
Above ground or balcony level.
150mm
J
From a surface facing the terminal.
600mm
K
From a terminal facing a terminal.
1200mm
L
From an opening in a carport (e.g. door, window) into the
dwelling.
1200mm
M
Vertically from a terminal on the same wall.
1500mm
N
Horizontally from a terminal on the same wall.
300mm
FIGURE 1