50 cm
< 5 m
> 5 m
< 5 m
50
H min
β
15
ASSEMBLY AND INSTALLATION INSTRUCTIONS
Chapter5
CONNECTION TO THE FLUE AND COMBUSTION PRODUCT EXHAUST VENTING
The fl ue must receive exhaust from a single heat generator.
Direct discharge towards enclosed areas, even when roofl ess, is forbidden.
Direct discharge of combustion products must take place on the roof and the exhaust duct must have the
features set forth in the section “Chimney or single fl ue”.
CHIMNEY CAP
The chimney cap must meet the following requirements:
have an internal section equivalent to that of the chimney;
have a useful outlet section no less than twice the internal section of the chimney;
be constructed in such a way as to prevent the penetration of rain, snow and foreign bodies into the
chimney, as well as to assure the discharge of the combustion products also in the presence of winds
coming from any direction and at any angle.
be positioned in such a way as to assure proper dispersion and dilution of the combustion products
and, in any case, outside the refl ux area in which the formation of counter-pressure is most likely to occur.
This area has diff erent sizes and shapes depending on the slope of the roof; therefore, it is necessary to
use the minimum heights indicated in the fi gures below.
The chimney cap must not have any mechanical suction devices.
SLOPED ROOF
FLAT ROOF
Distance > A
Distance < A
50 cm beyond the ridge beam
REFLUX AREA
Refl ux area height
fi gure 5.9
fi gure 5.10
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