Flue Exhaust To Flue/Chimney; Flues, Chimneys And Chimney Caps - Immergas VICTRIX OMNIA Instructions And Recommendations

1.22 FLUE EXHAUST TO FLUE/CHIMNEY.

Flue exhaust does not necessarily have to be connected to a
branched type traditional flue for type B appliances with natural
draught (CCR).
The flue exhaust, for boiler clots installed in C configuration, can
be connected to a special LAS type multiple flue.
For B configurations, exhaust is only allowed into individual
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chimney or directly into the external atmosphere via a relevant
terminal, unless otherwise provided by local regulations.
The multiple flues and the combined flues must also only be con-
nected to type C appliances of the same type (condensation), hav-
ing nominal heat inputs that do not differ by more than 30% less
with respect to the maximum that can be attached and powered by
the same fuel.
The thermo-fluid dynamic features (flue flow rate, % of carbon di-
oxide, % humidity etc.) of the appliances attached to the same
multiple flues or combined flues, must not differ by more than 10%
with respect to the average boiler attached.
Multiple and combined flues must be specially designed accord-
ing to the calculation method and requirements of the standards
(such as UNI 13384), by professionally qualified technical staff.
Chimney or flue sections for connection of the flue exhaust pipe
must comply with requisites of technical standards in force.
It is possible to replace a type C conventional device with one pro-
vided with condensation only, if the derogation conditions estab-
lished by the regulations in force have been verified.
The flues, chimneys and chimney caps for the evacuation of com-
bustion products must be in compliance with applicable stand-
ards.
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1.23 FLUES, CHIMNEYS AND CHIMNEY CAPS.

Chimneys and roof-installed exhaust terminals must comply
with the outlet height and with the distance from technical vol-
umes set forth by the technical standards in force.
Positioning the wall flue exhaust terminals.
The wall flue exhaust terminals must:
- be installed on external perimeter walls of the building
(Fig. 33);
- be positioned according to the minimum distances specified in
current technical standards.
Combustion products exhaust of natural draught or fan
assisted appliances in open-top closed environments.
In spaces closed on all sides with open tops (ventilation pits,
courtyards etc.), direct combustion product exhaust is allowed for
natural draught or fan assisted gas appliances with a heat input
range from 4 to 35 kW, provided the conditions as per the current
technical standards are respected.
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