DEFRA Stove Installation and User Guide
minimum effective height of the flue must be at least 4.5 metres from the
top of the stove to the top of the flue outlet. When warm the flue draught
should be between 0.1 to 0.2 mb.
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.
A chimney may comply with regulations but could still be subject to down
draught and similar problems. A chimney terminating above the ridge level
is generally less likely to suffer such problems.
If a new chimney is being provided it should fully comply with the relevant
Building Regulations that specify the requirements for solid fuel burning
installations. Suitable types of chimney include the following :
• Masonry Chimney : Built with clay or concrete liners, or a chimney
block system meeting Building Regulations. These types of chimneys
should be installed in accordance with the Building Regulations and
BS EN 15287-1:2007.
• Factory Made Insulated Chimney : Complying with BS 4543:Part 2
(often called Class 1 prefabricated metal chimney). These types of
chimneys should 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 that covers the General Requirements for chimneys.
The minimum performance 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.
BK575 Rev02
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