Cola BETTY Manuel d'installation, d'utilisation et d'entretien - Page 7

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2.4 Room ventilation

The air necessary for combustion, i.e. up to 20 m³ every hour, must be ensured in rooms where stoves with
natural flue draught are installed. The air change must occur through several fixed openings to the outside, whose
cross section must comply with the current local regulations. These openings must be protected with grilles and
must never be obstructed.
If the air is insufficient, even the operation of an extractor hood in the room or exhaust fans can negatively affect
stove operation.
2.5 Advice on flues and connections
Flues must be made from suitable materials and perfectly insulated, with characteristics that prevent temperature
decreases.
The inner 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.
Approx. 0.5m
At least 0.5 m
Obstacle
Less than 5 m
Roof
(α)
(α)
(α)
(α)
slope
15°
30°
45°
60°
Before connecting 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.
Make sure there are no obstructions caused
by foreign bodies or a buildup of soot.
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.
Fig. 3 stove-flue connection
The chimney outlet must be at least
0.5 m higher than any obstacle within
a radius of 10 m.
At least 0.5 m
UNI 10683/98 tables
Distance A
1.00 m
1.30 m
More than 1.85 m
2.00 m
2.60 m
positioning
Roof
(α)
(α)
(α)
(α)
slope
H
15°
30°
45°
60°
N O
6
fig. 2 Chimney cap distances and
Distance B
Less than 1.85 m
M A X 4 5 °
Y E S
H
0.50 m
0.50 m
0.50 m
0.50 m
N O
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