5.2.2 Chimney or single flue
The chimney or flue must meet the following requirements:
- be sealed to combustion products, waterproof and properly insulated according to the usage
conditions;
- be made of materials suitable to resist normal mechanical stress, as well as heat and the action
of combustion products and any condensates;
- have a predominantly vertical layout with deviations from the axis no greater than 45°;
- be situated at a proper distance from combustible or flammable materials by means of an air gap
or suitable insulation material;
REFERENCES
Flammable
objects
Non-flammable
objects
A 200 100
B 1500 750
C 200 100
- preferably have a round internal section: square or rectangular sections must have rounded
edges with radius no less than 20 mm;
- have a constant, free and independent internal section;
- have rectangular sections with a maximum ratio between sides of 1.5.
The exhaust pipe should be equipped with a chamber for the collection of solid materials and any
condensates located below the mouth of the exhaust pipe, so that it is easy to open and inspect
from the airtight hatch.
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