MCZ Boxsystem 75 FR - Manual (Page 11)

Chapter 2
INSTALLATION AND USE MANUAL
page
11
Theoretical concepts for installation Technical service - MCZ S.p.A. all rights reserved - Reproduction prohibited
2.6. CHIMNEY POT
If underestimated, it is a terminal impediment to correct "chimney
system" operations.
Chimney flue draught is also a function of its chimney pot.
Therefore, if hand made, its four exhaust sections must correspond to
more than twice the internal section of the chimney flue.
Having to exceed the peak of the roof, the chimney pot will be
exposed to wind from all directions, thus an industrial type is
recommended.
Industrial chimney
pot with overlapping
prefabricated
elements.
Permits excellent
smoke exhaust.
Traditional hand
made chimney pot.
The right exhaust
section must be at
least twice the
internal section of
the chimney flue,
2.5 times is ideal.
Steel chimney pot
for chimney flue with
internal smoke
deflector cone.
Permits excellent
smoke exhaust.
Chimney pots must meet the following requirements:
• It must have an internal section equal to that of the chimney.
• It must have a useful outlet section not less than twice that of
the internal section of the chimney flue.
• It must be built to prevent rain, snow and any foreign object
from getting into the chimney flue.
• It must be installed so as to guarantee suitable smoke
dispersion and, in any case, out of the reflux area where
counter-pressure formation is probable.
For paired chimney flues, the chimney pot for solid
combustion or the one for the upper floor must be at
least 50cm higher than the other to avoid pressure
transfers between paired flues.
The chimney pot must not have obstacles within 10 mt
such as walls, roof pitches or trees. Otherwise, raise it
at least 1 mt above the obstacle and, in the event of
other nearby chimney pots, keep them at least 2 mt
apart. In any case the chimney pot must exceed the
peak of the roof by at least 1mt.
1
m
t
0,
5
m
t