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There must be no leakage of smoke through the structure of
the chimney during or after the smoke pellet test and it is
important to check inside upstairs rooms adjacent to the chimney /
flue. Check the chimney pot / terminal and general condition of the
brickwork or masonry. If the chimney or flue is in poor condition or if
there is no up-draught do not proceed with the installation. If there is a
history of down-draught conditions with the chimney / flue, a tested and
certificated flue terminal or cowl suitable for the relevant flue type should
be considered.
A spillage test must always be carried out during commissioning of
6.
the appliance.
1.6
CHIMNEY OPENING AND CATCHMENT SPACE
The front opening of the chimney must be between 300mm and 440mm wide, and
between 300mm and 440mm high. If the opening exceeds these dimensions then
an opening must be constructed from suitable non-combustible material to
produce a correct size opening. Any opening must be suitably sealed to prevent
leakage. See below in fig.1
Fig. 1
300mm Minimum
440mm Maximum
When installing into a brick built chimney, you must ensure that there is sufficient
depth to accomodate any debris which may fall from the chimney. This depth
must be sufficient to accomodate 12 litres of volumetric space.
460mm Minimum
Fire Opening
Minimum Flat
Sealing Area
10mm all round
300mm Minimum
440mm Maximum
6
460mm
Minimum
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