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• Chimney • re.
If, despite all the precautions, a • re should occur in the chimney (you
generally notice that because of a roaring sound in the chimney), do the
following:
• Immediately shut the chimney • ap (if • tted).
• Immediately shut the air supply to the stove.
• Call the • re brigade (112).
• Quickly quench the • re in the appliance with sand or soda in order to
prevent smoke in your house.
• Never use water to put out the • re.
• Ventilate.
• If there has been a • re in the chimney, have it swept and inspected for
damage and leakage.
7.2. OUTPUT
In practice, combustion is all about loss. This entails:
• Loss through excess heat leaving the chimney, rather than going into the
room.
• Loss through insuf• cient combustion, such as CO (carbon monoxide) and
soot particles.
• Loss through excessive unburnt fuel in the ash.
The rate at which fuel can burn completely is called the output. A well-stoked
• re achieves output of 75% and thus falls into the category of high-output/
low emissions • res. This means that you bene• t directly by using less wood to
achieve the same level of heat. The environment bene• ts as well: a well-stoked,
high-output appliance means less pollution and fewer odours.
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