12
Chimney
For correct operation of the stove, the height of the chimney from its base should not be less than 4.5m and it should
terminate above the roof in accordance with current Building Regulations. All requirements as outlined in BS EN 15287-
1:2007. Failure to observe the recommended minimum sizes or methods of flue connection may lead to fume emission
and reduce burning rates. The diameter of the connecting flue and chimney should at no point narrow to less than the
diameter of the appliance flue outlet.
When fitting the stove to an existing chimney, its internal and external condition should be checked before the appliance
is installed. The chimney must be swept before installation. The flue must be stable and free from all jointing compounds.
Ensure a new chimney is free of internal projections, such as jointing compounds, before installing the appliance. The
stove must not share a chimney with another appliance.
When using a factory-made insulated chimney, it must comply with BS 4543 Parts 1 and 2. The recommended diameter
is 150mm; contact the chimney manufacturer for further advice.
After deciding whether to use the top or rear exit on the stove, fit the flue socket plate and blanking plates in the required
positions, ensuring a good seal is made with fire cement or similar. When using the rear exit, always use an appropriate
tee; a 90° elbow should not be used.
Advise the end user to have the chimney thoroughly swept at least every twelve months. If bituminous coal or wood is
used, the chimney may require more frequent sweeping.
Flue layout
If the stove is installed in an existing recess directly below a chimney flue, the exhaust end of the flue pipe must extend
into the throat of the chimney, at least 150mm into the overhanging brickwork. Any cavities or pockets above the throat
plate should be filled.
If the stove is connected via flue pipe to an existing brick chimney, square bends and horizontal runs must not be used. A
cleaning door must be included at every bend. See
fig 4
below for details.
Avoid extended horizontal flue runs. Whichever method of installation is used, air must not be allowed to enter the
chimney, save through the stove; all joints must be airtight. If the chimney is unlined and there is doubt as to its condition,
it should be lined in accordance with current Building Regulations.
