2. The appliance should be sited in a properly constructed brick fireplace or recess
allowing a gap of 100mm all round, at the rear and both sides. The fireplace walls
must be made of solid non combustible material and at least 75mm thick. It is
possible to reduce the all round clearance to 75mm but this will reduce the ability
of the appliance to heat the room and could lead to over firing of the stove and
structural damage to the surround. If this reduced air gap is unavoidable it will be
necessary to increase the thickness of the surrounding wall to 200mm. If the air
gap around the appliance is reduced to 75mm, then increase the gap above to
375mm to allow the air to move into the room. The hearth should be level and the
appliance fitted at right angles to it. Fireplace walls need to be at least 1.2m above
the hearth and at least 300mm above the appliance. The hearth has to be able to
support the weight of the appliance and any flue bearing down upon it. The
clearance distances to combustible material beneath, surrounding or upon the
hearth and walls adjacent to the hearth should comply with the guidance on the
separation of combustible material given in Building Regulations Approved
Document J and also in these stove instructions.
Chimney
This appliance must not be fitted into a chimney serving another heating appliance. It
is most important that there is no obstruction in the flue or chimney. Please ensure
that any existing chimney is clear of obstruction and swept clean immediately before
installation of the stove. If the chimney has been used for an open fire it is
recommended that it be swept for a second time having been used for a month
following installation. As a closed appliance operates at a higher flue temperature, it is
possible for deposits that were previously adhered, to be dislodged, with the
consequent risk of flue blockage.
A flue draught of minimum 1.5mm (14.71 Pascal’s) to a maximum 2.5mm (24.52
Pascal’s) water gauge is required for satisfactory appliance performance. A properly
built masonry or factory constructed chimney, preferably with a height of 5 metres or
more, should ensure a consistent draught (draw) under a variety of weather
conditions. The flue draught should be checked under fire at high output and if it
exceeds the recommended maximum, a draught stabiliser must be fitted so that the
rate of burning can be controlled, and to prevent over firing (see 5 below). If you have
any doubts about the suitability of your chimney, consult your local dealer/stockist.
The outlet from the chimney should be above the roof of the building in accordance
with the provisions of Building Regulations Approved Document J.
If installation is into an existing chimney then it must be sound and have no cracks or
other faults which might allow fumes into the house. Older properties, especially, may
have chimney faults or the cross section may be too large i.e. more than 230 mm x
230 mm. Remedial action should be taken, if required, seeking expert advice, if
necessary. If it is found necessary to line the chimney then a flue liner suitable for
solid fuel must be used in accordance with Building Regulations Approved Document
J.
If there is no existing chimney then either a prefabricated block chimney in
accordance with Building Regulations Approved Document J or a twin walled
insulated stainless steel flue to BS 4543 can be used. These chimneys must be fitted in
accordance with the manufacturer’s instructions and Building Regulations.
