2.3
PREPARATION OF THE COMBUSTION CHAMBER OPENING
(INTO EXISTING CHIMNEY BREAST)
An opening should be constructed to the following dimensions in the existing
chimney breast. See fig. 5 below
Fig. 5
Adjustable feet are fitted to the combustion chamber to allow fine tuning of it’s
positioning
NOTE
: Please ensure that access holes are cut into either the sides or area
above the lintel to allow access to the flue pipe connection if using a flue liner.
Such access holes are also advantageous in installations where a flue liner is not
required as they provide access for servicing purposes.
If installing without a flue liner, please ensure that sufficient depth is available in
the opening to collect a minimum volumetric area of 12 litres (0.012m3) of flue
debris.
Refer to Fig. 1 on page three for dimensions of the flue outlet.
CHECK ANY LOAD BEARING STRUCTURAL ITEMS ARE NOT
AFFECTED BY THE INSTALLATION OF THE PRODUCT. SEE FIG 6
OVERPAGE.
8
Minimum Width 750mm
Maximum Width 765mm
Minimum Height 540mm
Maximum Height 545mm
Minimum Depth 333mm
Lintle must
project 150mm
either side of the
opening if
cutting into an
existing chimney
breast
MINIMUM HEIGHT FROM
FLOOR LEVEL TO
BOTTOM OF OPENING IS
150MM
IMPORTANT
ENSURE PLATFORM
FOR SUPPORTING
PRODUCT IS
APPROXIMATELY 30MM
BELOW THE BOTTOM
OF THE OPENING TO
PREVENT A GAP AT
BOTTOM OF THE TRIM
