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Chimney Requirements
The Stovey must be connected to a suitable and efficient flue to ensure that fumes produced by
combustion are properly expelled from your home. Please remember that chimney draught is
dependent upon four key factors:
• Flue gas temperature • Flue height • Flue size • Flue terminal
To ensure an effective up draft it is important that the flue gases are kept warm, and that the
flue size suits the Stovey. The termination of the outlet at the top of the flue must also conform
to specified building regulations. The minimum effective height of the flue must be at least
4.5 metres from the top of the Stovey to the top of the flue outlet. The flue draught should be
between 0.1mb and 0.15mb when warm.
The draw of a chimney/flue can vary in different weather conditions, and the customer should be
made aware of this.
Failure to correct an over-drawing flue will invalidate the warranty on this appliance.
A chimney that complies with regulations may still be subject to down draught and similar issues.
A chimney that terminates above ridge level is generally less likely to suffer such problems.
If a new chimney is being provided it must comply fully with the relevant building regulations for
solid fuel burning installations. Suitable types of chimney include:
• Masonry chimneys: Built with clay/concrete liners, or a chimney block system that complies with
building regulations.
• Factory made installation chimneys: In compliance with BS 4543:Part 2 (often called ‘Class 1
prefabricated metal chimney’).
Both varieties of chimney listed above must be installed in accordance with building regulations
and BS EN 15287-1:2007.
Due to the gradual introduction of European Chimney Standards, chimneys will be specified
according to their performance designation, as defined in BS EN 1443 regarding the general
requirements for chimneys. The minimum performance designation required for use with a solid
fuel burning Stovey is T450 N2 S D3.
The flue and chimney installation must be carefully checked by a competent person before the
Stovey is fitted, to ensure it is suitable and will work as intended. The Chimney must be swept and
examined for soundness and suitability before the appliance is installed.
Remedial action should be taken if required, seeking expert advice if necessary. Where the
chimney is believed to have previously served an open fire installation it is possible that the higher
flue gas temperature from a closed appliance may loosen deposits that were previously firmly
adhered, with the consequent risk of flue blockage. It is therefore recommended that the chimney
be swept a second time within a month of regular use after installation.
If the chimney is old (i.e. built from brick or stone without a liner) or being opened up for reuse,
additional checks and smoke testing should be carried out to ensure that the flue and chimney are
in good operating condition, as described in Appendix E of Approved Document J 2010 Edition.
