Termo
ISOTTA – DSA
7199701 Rev.05 – EN
25
The chimney cap must meet the following requirements:
•
have internal section equivalent to that of the stack.
•
have a useful output section twice as big as the flue internal one.
•
be manufactured in such a way as to prevent the penetration of rain, snow, and any other foreign body in the
flue.
•
be easily checkable, for any possible maintenance and cleaning operation.
Picture 6
Picture 7
Picture 8
Picture 9
50 cm
(1) In case of flues side by side, a chimney cap must be
higher than the other one of at least 50 cm in order to avoid
pressure transfers between the flues themselves.
(1) Industrial chimney cap
with
pre-fabricated
elements – it allows an
excellent discharge of the
smokes.
(2) Handicraft chimney cap.
The right output section must
be at least twice as big as the
internal section of the flue
(ideal value: 2.5 times).
(3) Chimney cap for
steel flue with conical
deflector of smokes.
>
_
A
>A
0,5 m
H min.
α
(2)Roof
(1)Ridge axis
(1) The chimney cap must not show hindrances within 10 m
from walls, pitches and trees. Otherwise raise it of at least 1 m
over the hindrance.
The chimney cap must exceed the ridge of the roof of at least 1
m.
2 m
10 m
1
m
