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•
Chimney fi re.
If, despite all the precautions, a fi 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 fl ap (if fi tted).
•
Immediately shut the air supply to the fi re.
•
Call the fi re brigade (112).
•
Quickly quench the fi re in the appliance with sand or soda in order to
prevent smoke in your house.
•
Never use water to put out the fi re.
•
Ventilate.
•
If there has been a fi 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 insuffi 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
fi re achieves output of 75% and thus falls into the category of high-output/
low emissions fi res. This means that you benefi t directly by using less wood to
achieve the same level of heat. The environment benefi ts as well: a well-stoked,
high-output appliance means less pollution and fewer odours.
Adverse effects on the output are:
•
Burning the fi re with the door open.
A warm chimney works in the same way as an extractor. When the door is
open, the chimney draws in much more air than is necessary for combustion.
This relatively cool air cools down the fi re.
38
CUATRO-2 60
CUATRO-2 70
CUATRO-2 80
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