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5.9. The hearth.
The appliance must be mounted on a non-combustible hearth except when the
conditions in section 5.10.3 are met (N.B. conglomerate marble hearths are
considered as non-combustible). The hearth must be at least 680mm wide x 300mm
deep. The hearth material must be at least 12mm thick. The periphery of the hearth
(or fender) should be at least 50mm above floor level to discourage the placing of
carpets or rugs over it.
5.10 Installation options.
In the United Kingdom, as supplied, this appliance can be installed in the following
situations:
5.10.1 Conventional fireplace.
The fireplace opening must be within the following dimensions:
*
The total height of the closure plate is 660mm and will accommodate a maximum
opening height of 650mm (This allows a 10mm overhang). Heights above
635mm (Inclusive of sealing tape) will leave the sealing tape and closure plate visible
above the appliance.
5.10.2 Precast flues.
The appliance can be installed to a fireplace that has a properly constructed precast
concrete or clay flue block system conforming to BS1289 or BS EN 1806. The
appliance is suitable for installations conforming to older versions of BS1289 as well
as the current standards. The flue blocks must have a minimum width not less than
63mm and a cross-sectional area not less than 13,000mm 2 . Older editions of BS1289
required a cross-sectional area of 13,000mm 2 . The current revision of the standard
requires 16,500mm 2 . This appliance is suitable in both cases.
The chimney should be one or two storey high but not less than 3m vertical height
and be correctly terminated. No mortar fangs between the blocks should be extruded
into the flueway. If raking blocks are used, they must be fitted in accordance with the
manufacturer's instructions. Mortar must not be allowed to drop down and accumulate
in the raked positions.
©
GDC Group Ltd. JAN 2017
INSTALLER GUIDE
Width
Max.
432mm
Min.
305mm
Height
610mm *
Max.
Min.
550mm
Page 14
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