SITE REQUIREMENTS (continued)
Opening
DEPTH
must be 145 mm or greater. Opening
DEPTH
includes any plaster, cement or infill/back pan-
els 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 exist-
ing under grate draught device should be sealed off to prevent loss of heat or creation of draughts. The pas-
sageway into the flue should be partially sealed to prevent excessive draughts, however some ventilation will be
required in the old flue to prevent condensation and dampness. Advice should be sought from your local build-
ing 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 section. Bare plas-
terboard must be protected by non-combustible plaster or replaced with non-combustible 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, projecting 100mm from
the front of the appliance. The top surface must be at least 50 mm above the surrounding floor level or be sur-
rounded 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 tem-
perature 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 articles 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 combustible 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 cm2purpose provided ventilation is required for this appliance. An openable window or lou-
vre is also required. The requirements of other gas appliances operating in the same room or space must be
taken into consideration when assessing ventilation.
Any ventilation fitted must comply with BS 5871 part 2 and BS 5440 part 2 insofar as the relevant 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 system. The appliance MUST NOT be installed in a bed-
room, bathroom or any sleeping area. For Republic of Ireland, see relevant rules in force.
3
Maximum ddepth oofsshellf MMinimum ddistancceffrom hhearth ttouunderside oofsshelf
180mm 850mm
100mm 790mm
4.0
4.1
