Caution
The calculation of the length of the flue gas pipe must be made by
a qualified technician during the installation design phase, in
accordance with the requirements of the prevailing standards.
7.5.5 Lengths of the air/flue gas pipes
Warning
The discharge and intake pipes must be certified for the adapted
configuration and their pressure drops must comply with the
values given in the following corresponding table(s).
Caution
Be careful that the discharge pipe outlet for combustible products
is not directed towards a habitation zone.
B23p configuration
All countries except Italy Ventilation of the premises: in accordance with the NFP 45 – 204 or DTU 61.1 standard.
Italy Ventilation of the premises: in accordance with the UNI CIG 7129-2001 standard.
All countries Lengths L1, L2 and L3 are obtained with Centrotec pipes covered by CE marking and
the TAD Technical Application Directive.
Fig.74 Flexible flue system B
23p
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