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PRACTIKA 28-33
USE AND INSTALLATION MANUAL
Chapter 4
page 23
Installing a “Practika”
Technical dept. - All rights reserved - Reproduction prohibited
4.4.2.
Roof outlet along a traditional flue pipe
The flue smoke can also be discharged using an existing traditional flue pipe provided it is compliant to
standards (see UNI 10683).
Here is a brief list of the main characteristics highlighted in the standard that distinguish a good chimney:
- Suitable insulation and lagging especially in the external section exposed to the atmosphere;
- Constant internal cross-section (there must not be any narrower sections);
- Made with material resistant to high temperatures, to the action of the products of combustion and to the
corrosive action of any condensation that may form;
- Prevalently vertical arrangement with deviations from the axis of no more than 45°;
It is compulsory to include a chamber for the collection of solid material and/ or any condensation, which
can be inspected through an airtight door.
It is compulsory to observe the provisions of standards UNI 9615 and 9731 for the sizing of the chimney
cross-section and, in all cases, avoid installing ducts with a cross-section of less than 150 mm.
If larger cross-sections are used a steel duct must be inserted inside the masonry duct.
Direct outlet via walls is not permitted.
The steel pipe must be suitably insulated with material which is resistant
to high temperatures and sealed off from the external chimney.
Soot tray accessible for
inspection with possible
condensation discharge
