6
SITING THE APPLIANCE
Fireplace Opening
The fireplace opening must be between
405
mm and 450mm wide and between
555
mm and 570mm high. If
the opening intended for the appliance is in excess of these dimensions then a suitable surround must be
constructed of non-combusble material to produce an opening within this range of dimensions.
A flat face of a minimum 470mm wide and 590mm high must be provided around the fireplace opening to ensure a
good seal is formed. In addion it is important to ensure that the base of the fireplace opening is flat and level with
the hearth surface to ensure a secure and aligned installaon of the appliance.
The minimum hearth dimensions are shown in the diagram above. The upper surface of the hearth must be a
minimum of 50mm above the floor and must protrude a minimum distance of 300mm out from the fireplace
opening. (It is important to note that should a spacer of any kind be used to bring the appliance out of the fireplace,
then the 300mm dimension must be taken from the most forward surface of this spacer.
Installaon into a Brick Chimney
When the appliance is being installed into a brick chimney there must be sufficient depth behind the appliance to
accommodate any falling debris. This debris collecon void should be capable of accommodang up to twelve (12)
litres of volumetric space.
Installaon into a Prefabricated Twin Wall Metal Flue Box
This appliance can be installed into a prefabricated metal twin wall flue box providing it complies to the requirements
of BS715 / BS EN 1856-2. The box must have an insulated flue with a minimum diameter of 125mm (5”) diameter and
a minimum effecve overall height of 3 metres.
The top outer face of the flue box should be insulated to prevent heat loss with a layer of mineral wool insulaon or
similar. The metal flue box must stand on a non-combusble surface with a minimum thickness of 12mm.
