Marlene 3
8
Fig3 Chimney cap positioning and distances
Obstacle
Less thani 5 m
M
in
0
.5
m
Min 0.5m
Approx. 0.5m
Min 0.5m
Roof slope
(α)
(α)
(α)
(α)
Distance B
H
15°
0.50 m
30°
0.50 m
45°
0.50 m
60°
Less than 1.85 m
0.50 m
Roof slope
(α)
(α)
(α)
(α)
Distance A
H
15°
1.00 m
30°
1.30 m
45°
2.00 m
60°
More than 1.85 m
2.60 m
NO
NO
YES
MAX 45°
The first connection section leaving the stove
should
be
vertical,
whereas
the
flue
connection to the chimney (which goes to the
chimney cap) must only enter by a few cm, so
as not to reduce the cross section of the flue.
If the flue is not perpendicular to the chimney
it is advisable to make the connection with
special steel fittings that allow a maximum
slope of 45°.
If the walls and ceiling are made of flammable
materials, the parts in contact with the flue
must be suitably insulated. All connection
joints must be carefully sealed, in particular
where the connection enters the flue.
2.7 Advice on flues and connections
Flues must be made from suitable materials and perfectly insulated, with characteristics that prevent temperature
decreases.
The inside walls must be perfectly smooth without any narrowing or protrusions along the entire length, so as not to
create friction or vortices in the smoke which could cause a considerable reduction in draught.
Any doors for cleaning and inspection must be perfectly closed during operation.
The flue outlets must be 0.5 m higher than any obstacles within a radius of 10 m and must end with chimney caps or
cowls having a useful outlet cross section of at least double that of the flue.
The following two figures give the data regarding the distances and positioning of chimney caps in conformity with the
provisions of UNI 10683/98.
The chimney outlet must be at least
0.5 m higher than any obstacle
within a radius of 10 m.
•
UNI 10683/98 tables
Before connecting the stove to an existing chimney, in addition to complying with that described above, make sure
there are no openings or cracks where air could enter and cause a temperature decrease affecting the draught.
Lastly, make sure there are no obstructions caused by foreign bodies or a build-up of soot.
If there are other stoves in the same house, each must have its own flue. It is inadvisable to make holes in the flue for
connecting other appliances, as this could impair the draught.