3.2
In the United Kingdom, as supplied, this appliance can be installed in the
following situations: -
3.2.1
A masonry chimney with a minimum diameter of 175mm (7”) free from any
obstruction, and with any damper or restrictor plate in the chimney removed or secured,
and having a minimum effective flue height of 3m (10ft). A masonry chimney having a
correctly installed flue liner to BS715 and with a minimum flue diameter of 125mm is
also acceptable. Chair brick removal may not be required providing at least 50mm
clearance is available from the flue outlet to any fireplace component.
3.2.1.1
‘Hole-in-the-wall’ Installations
!
It is recommended that a hearth should be installed as in figure 1.
!
If a hearth is not fitted, the fire must be installed so that the distance from the
base of the fireplace opening in the wall to the finished floor level is at least 72mm.
3.2.2
To a fireplace incorporating a metal flue box conforming to BS715 with a
minimum internal depth of 165mm. Incombustible mineral wool insulation of not less
than 50mm thickness must be applied to the top surface of the firebox (See figure 2)
and it must stand on a non-combustible hearth (See figure 1).
3.2.3
(See figure 3). To a fireplace that has a 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 edition. 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 total depth of the opening
measured from the finished front of the
fireplace (Including plaster, surround etc.)
must be as below:
s
If the width at the rear of the precast flue
starter blocks is 300mm or greater the depth
of the opening is to be not less than 138mm.
Under these conditions the eyebolts will need
to be located as close to the sides of the
starter blocks as possible.
Page 7
INSTALLER GUIDE
Figure 2. Metal flue box
