SITE REQUIREMENTS (continued)
Opening
DEPTH
must be 90 mm or greater. Opening
DEPTH
includes any plaster, cement or
infill/back panels that form part of the installation.
In the event that the fire is sited in a disused or unserviceable fireplace served by a natural
draught flue, any existing under grate draught device should be sealed off to prevent loss of heat
or creation of draughts. The passageway into the flue should be partially sealed to prevent exces-
sive draughts, however some ventilation will be required in the old flue to prevent condensation
and dampness. Advice should be sought from your local building control officer.
If a concealed gas connection is to be made, the supply pipe should always be sleeved through
walls and floors using the shortest possible route. It is possible to install the gas supply from the
side of the hearth and round into the cavity but use only factory sleeved pipe. A length of no
more than 1.5m of 8mm diameter pipe must be used to avoid unnecessary pressure drops.
The wall for the opening must be non-combustible or prepared as described in the relevant sec-
tion. Bare plasterboard must be protected by non-combustible plaster or replaced with non-com-
bustible material (e.g. Superlux board). Any gap between wall boards and the wall must be filled
using glass fibre insulation, silicone mastic or similar material to prevent heat ingress.
If the appliance is to be installed as a 'hole in the wall' fire it does not require any hearth as such,
providing it is mounted more that 150mm (6") above floor level. NOTE: Depending on the fret
and trim type supplied with the fire, a suitable non-combustible ledge for placement of the fire
front will be required.
The appliance requires a hearth with a non-combustible surface of at least 12 mm thick, pro-
jecting 100mm from the front of the appliance. The top surface must be at least 50 mm above
the surrounding floor level or be surrounded by a raised edge or fender 50 mm high.
Any type of fire surround used with this appliance must be adequately sealed to the wall and
floor to prevent excess draughts from around the back of the fire. The temperature rating of any
surround used must be 150°C minimum.
A combustible shelf may be fixed to the wall above the fire, providing that it complies with the
dimensions given below.
The shelf depth may be greater but the height must also be increased accordingly. An increase
in height of 25 mm is required for every 12.5 mm of additional shelf depth. For shelves that are
too low protective devices can be used such as metal heat deflectors, but it must be assured that
the shelf does not reach an unacceptable temperature before relying on such a solution. A non-
combustible shelf may be fitted to within 100mm of the top edge of the fire frame, but any arti-
cles placed on it must also be tolerant of high temperatures.
Combustible materials such as wood may be fitted to within 100mm (4in) of either side of the
fire frame / trim, providing the forward projection does not exceed 100mm (4in). Any com-
bustible sidewalls must be at least 500mm to the side of the radiant heat source.
As with all heating appliances any decorations, soft furnishings and wall coverings (i.e. flock,
blown vinyl and embossed paper) positioned too close to the appliance may discolour or scorch.
VENTILATION
A minimum of 100 cm
2
purpose provided ventilation is required for this appliance. An openable
window or louvre is also required. The requirements of other gas appliances operating in the
same room or space must be taken into consideration when assessing ventilation. It is recom-
mended that the appliance should not be installed within 500mm of any air vent.
Any ventilation fitted must comply with BS 5871 part 4 and BS 5440 part 2 insofar as the rele-
vant areas are not covered by these instructions. Ventilation fitted under or within immediate
vicinity of the appliance must not be used as it may adversely effect performance of the ODS sys-
tem. The appliance MUST NOT be installed in a bedroom, bathroom or any sleeping area. For
Republic of Ireland, see relevant rules in force.
3
Maximum depth of shelf
Minimum distance from hearth to underside of shelf
180mm
850mm
100mm
790mm
4.0
4.1
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