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BK 680 Specific
Due to the gradual introduction of European Chimney Standards chimneys will
be specified according to their performance designation as defined in BS EN
1443 that covers the General Requirements for chimneys. The minimum per-
formance designation required for use with solid fuel burning stoves is T450
N2 S D3.
The flue and chimney installation must be carefully checked by a competent
person before fitting the stove to ensure it is suitable and will work safely.
If the chimney is old (i.e: built of brick or stone without a liner) or being opened
up for reuse additional checks and smoke testing as described in Appendix E
of the Approved Document J 2010 Edition should also be carried out to ensure
the flue and chimney are in good operating condition.
Check the existing flue is in good condition with suitable access for collection
and removal of debris.
It is also important that suitable flue pipe (recommended at least 600mm in
length) complying with the Building Regulations is used to connect the stove
to the flue in the chimney. Suitable access should be provided into the flue for
regular inspection and sweeping of the flue ways.
The installer should comply with Building Regulations requirements in respect
of providing a Notice Plate giving details on the chimney, flue lining, hearth
and fireplace installation.
Chimneys should be as straight as possible. Horizontal runs should be avoid-
ed except where the rear outlet of the appliance is used, in which case the
horizontal section should not exceed 150mm in length. If necessary a combi-
nation of 45° and 90° bends can be used as long as the sum of their angles is
not greater then 180° in total. IE : Four 45° bends, or two 45° and a 90° bend.
If the stove appears to be working hard but produces very little output to the
room it is likely that excess draw is present in the chimney, and that heat is
being sucked out of the appliance and up the chimney. If this is the case we
recommend the fitting of a draught stabiliser in preference to a flue damper, in
the interest of safety and efficiency.
ECOBOILER Cassette Installation Guide