Instructions for installation and use. Reproduction prohibited. 07/ 2010 version 2.0 TAM
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2.1.7 Flue covering
2.1.7.1 Occupied or habitable areas
The surface temperature of the outside facing of the flue must not
exceed 50°C in habitable areas. If it does, the flue must either be
protected by an insulating covering or concealed in boxing or a shaft
in order to ensure a maximum surface temperature of 50°C.
2.1.7.2 Non-habitable or inaccessible areas
The surface temperature of the outside facing of the flue must not
exceed 80°C in non-habitable or inaccessible areas. If it does this, the
flue must either be protected by an insulating covering or concealed in
boxing or a shaft in order to ensure a maximum surface temperature
of 80°C.
2.1.8 Crossing through roofing
2.1.8.2 General points
The safety distance must be complied with when crossing through the
roof frame.
For the safety distance to be complied with in the case of bricked
flues, see table in paragraph 2.2.2.
For the safety distance to be complied with in the case of metal flues,
see table in paragraph 2.2.3.
2.2 – Safety distance
2.2.1 General points
The element’s safety distance must be greater than that stated by the
manufacturer for its anticipated operating temperature, and the
minimums in the NF DTU 24.1 standard.
When the distance stated by the manufacturer is different from that featured
in the tables below, the flue must be installed at the greater of the two
values.
2.2.2 Concrete or terracotta bricked flue
2.2.3 Metal composite flue
b r ic k e d f lu e s
S t a n d a r d i s e d R u i n m
2
. K / W
f l u e t e m p e r a t u r e c l a s s
( e l e m e n t )
> 0 . 0 5
t o
≤
0 . 3 8
> 0 . 3 8
t o
< 0 . 6 5
≥
0 . 6 5
T ? 1 6 0
2 c m
2 c m
2 c m
1 6 0 < T
≤
2 5 0
5 c m
2 c m
2 c m
T > 2 5 0 a n d / o r r e s is t a n t t o
c h im n e y f ir e
1 0 c m
5 c m
2 c m
T h e r m a l re s is t a nc e o f c o m p o s i te m et a l fl u e
(R ex p res s e d in m
2
. K / W )
T e m p e ra tu re c la s se s
o f co m p o si te m e ta l flu e
R < 0. 4
0 . 4 < R <
0 . 6
R > 0. 6
T 3 0 0 to T 4 6 0
a
8 c m
5 c m
a
us e p roh i bi te d b e c au s e o f m ajo r ris k s : fi re a nd b ur n s
