a
a
b.1
b
a
a
a
a
b.1
b.1
b
b
OK
OK
ENGLISH
SMOKE DUCT
General requirements
The smoke ducts must be installed in compliance with the following general requirements:
be equipped with at least one sealed outlet for eventual fumes sampling;
they must be insulated if they cross through rooms that are not to be heated or outside the building;
they must not cross rooms in which the installation of combustion appliances is forbidden, nor in other premises
compartmentalised against fire or with a fire hazard, nor in rooms and/or areas that cannot be inspected;
they must be installed so as to allow normal thermal expansion;
they must be fitted to the opening of the chimney without protruding inwards;
the use of flexible metal pipes to connect the appliance to the chimney is not allowed;
nominal diameter;
distance from combustible materials, indicated in millimetres, followed by the arrow and flame symbol;
installer data and date of installation.
Every time one must cross combustible materials, the following indications must be complied with:
SYMBOL
DESCRIPTION
QUOTA[MM]
b
Minimum distance of combustible materials from the intrados of the framework/floor/wall
500
b.1
Minimum distance of combustible materials from the extrados of the framework/floor
500
a
Minimum distance from combustible materials defined by the manufacturer
G(xxx)
The single wall pipes are indicated in white.
The insulated double wall chimney systems are indicated in grey.
One can disregard the quota only in the event of using an appropriate heat protection screen (for example: wall plate) to
protect the intrados of the framework/floor
Chimney
Chimney
Incorrect
Correct
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