18
Flue pipes must not pass through places in which the
installation of combustion appliances is forbidden;
The assembly of flue pipes must be performed in a way to
guarantee the sealing against flue gas for the appliance
functioning conditions in low pressure;
The assembly of horizontal tracts is prohibited, unless
absolutely necessary;
It is forbidden to use tilted elements;
The flue gas pipe must allow the recovery of soot or be
cleanable and must have a constant section;
It is prohibited to make other air intake channels and pipes, for
plant engineering, transit inside the flue gas pipes, even if
over-dimensioned.
