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4.0
SITE R R EQUIREMENTS
The fireplace opening should be inspected and repairs made where necessary. The flue must be connected to
only one fireplace, and the flue must not vent more than one appliance (i.e. not shared with a gas back boiler).
There must be no opening in the flue apart from the one that the appliance is installed into, and the one venting
the gases into the air. A suitable terminal may be fitted, such as class GC1, as regulations allow.
The opening WIDTH and HEIGHT dimensions should be between 785mm and 865mm wide, and 670mm to
710mm high.
Opening DEPTH should be 350mm or greater. Opening DEPTHS include any plaster or infill panels which form
part of the installation.
This appliance requires a natural draught flue system which may be one of the following;
225mm x 225mm (9in x 9in) brick or stone.
175mm (7in) minimum diameter lined brick or stone.
175mm (7in) minimum diameter twin wall flue conforming to BS 715.
Any existing under grate draught device must be sealed off.
The opening wall must be non-combustible and have adequate flat surface for appliance sealing.
The appliance is supplied with a non-combustible hearth, the surface of which is at least 12mm thick. The top
surface is at least 50mm above the surrounding floor level. The appliance must be fitted with this hearth.
To enable the products of combustion to be cleared properly up the flue, the outlet on the top of the appliance
must have a minimum 50mm clearance between it and the back wall of the opening or other obstruction. The
area immediately above the outlet must form a smooth path into the flue.
A combustible shelf may be fixed to the wall above the fire, providing that it complies with the dimensions given
below.
A non-combustible shelf may be fitted to within 30mm of the top edge of the fireframe.
Maximum d d epth o o f s s helf
Combustible materials, such as wood, may be fitted to within 100mm (4in) of either side of the frame of the
appliance, providing the forward projection does not exceed 100mm (4in).
Any combustible side walls 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.
5.0
VENTILATION
No purpose provided ventilation is normally required for this appliance. The requirements of other appliances
operating in the same room or space must be taken into consideration when assessing ventilation.
If spillage is detected when commissioning the appliance then amongst other problems there may be insufficient
natural ventilation for the correct operation of the flue. This is potentially a greater problem should the property
be of modern nature. If the appliance does not spill with windows open but does with windows closed, this
proves that lack of ventilation is the problem, if not, it will be the flue at fault. Installation of an air brick is the best
100mm (4in)
150mm (6in)
203mm (8in)
M M inimum d d is s tanc c e f f rom s s urfac c e o o f h h earth
to u u nders s ide o o f s s helf
860 mm (34 in)
970 mm (38 in)
1020 mm (40 in)
3
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