finished floor covering. Any opening visible below the appliance may be closed in but
the depth of the catchment space within the wall opening must be as shown in figure 2.
4.11.4
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 13,000mm2. Older editions of BS1289 required
a cross-sectional area of 13,000mm2. The current revision of the standard requires
16,500mm2. 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.
The fireplace opening must be within the following dimensions:
1 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.
2 Any opening visible below the appliance may be closed in.
4.11.5
Metal flue box.
The appliance can be installed to a metal flue box conforming to BS715 with a
minimum internal depth of 200mm. Incombustible mineral wool insulation of not less
than 50mm thickness must be applied to the top surface of the firebox and it must stand
on a non combustible hearth. There must be an air gap clearance of 50mm all round the
outside of the box and above the top insulation to any combustible material.
The opening must be within the following dimensions:
Page 12
INSTALLER GUIDE
©
Baxi Heating U.K. Limited 2007.
Width
Height
Max.
432mm
Min.
407mm
Max.
610mm*
Min.
560mm**
Width
Height
Max.
432mm
Min.
305mm
Max.
610mm1
Min.
550mm2
