Chimney – MCZ Kasai User Manual
Page 14
Chapter 2
USE AND MAINTENANCE MANUAL
page
14
Installation recommendations in compliance with UNI 10683
Technical dept. - All rights reserved by MCZ GROUP S.p.A. - Reproduction
prohibited
2.9. CHIMNEY
Often, if it is underestimated, it prevents the correct functioning of the
"chimney system".
The draught of the flue pipe also depends on its chimney.
It is therefore vital that, if it has been hand-crafted, the development of
the four relief sections correspond to more than twice the internal
cross-section of the flue pipe.
Since it should always be higher than the ridge of the roof, the
chimney will be exposed to all weather, and so an industrial-
type chimney is recommended.
Industrial chimney
with prefabricated
stacked elements.
Allows excellent
smoke disposal.
Traditional hand-
crafted chimney.
The correct outlet
cross-section should
be at least twice the
internal cross-
section of the flue
pipe, ideally 2.5
times its size.
Steel flue pipe
chimney with
internal smoke-
deflector cone.
Allows excellent
smoke disposal.
The chimney must:
Have an inner section equal to that of the flue.
Have a working outlet section of at least double that of the
inner section of the flue pipe.
Be built in such a ways as to prevent rain, snow and any
foreign bodies from penetrating the flue pipe.
Be positioned so as to ensure adequate dispersion of smoke
and, in all cases, outside the reflux area in which back-
pressures are likely to form.
In the case of paired flue pipes, the solid
combustibility or upper storey chimney shall be at
least 50 cm higher than the others in order to avoid
the transfer of pressure from one paired pipe to the
other.
The chimney must not have any obstacles within a
range of 10 metres, including walls, pitches and trees.
If this is the case, then raise it at least 1 metre above
the obstacle and in the event of other chimneys
nearby, space them at least 2 metres apart and in all
cases the chimney must protrude from the ridge of the
roof by at least 1 metre.
UPPER STOREY OR SOLID
COMBUSTIBILITY
LOWER STOREY
1
m
t
0,
5
m
t
YES
NO