INSTALLER GUIDE
Page 14
3.10.1.1
‘Hole-in-the-wall’ Installations.
It is recommended that a hearth should be installed as in section 3.8.
If a reduced depth hearth is 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 100 mm. It is recommended that the reduced hearth has a depth from the
fixing plane of the fire of 100mm minimum. This is necessary to support the ash
pan casting. Where there is no floor covering or carpet and the floor is of a type
that is likely to be covered in such a way in the future then the distance from the
base of the fireplace opening in the wall to the floor level should be increased to at
least 175mm.
3.10.2
Metal flue box and hearth.
The appliance can be installed to a fireplace incorporating a metal flue box complying
with the constructional requirements of the current edition of BS 715 and with a flue
conforming to BS EN 1856 part 1. The dimensions of the flue box must conform to
those shown in figure 6.
The top, sides and rear surface of the metal flue box must be covered with a 50mm
layer of mineral wool or equivalent insulation (See figure 6).
Important Note
: Where the flue box has a base sheet that is single wall (i.e. a single
metal sheet) the flue box must be mounted on a non-combustible hearth. The hearth
material must be at least 12mm thick.
©
Baxi Heating U.K. Limited 2010.
Figure 6. Metal flue box dimensions
