Cadel IDRON 22 AIRTIGHT, Installation, Use And Maintenance Manual, Page: 11 / 56

11 AQUOS - IBIS - IDRON
EN
LEGEND
1 Windproof
2 Flue
3 Inspection
Use adequate instruments to verify that there is a minimum draught of 5 Pa.
Set-up an inspection hole at the bottom of the chimney to perform periodic checks and
cleaning, which must be done annually.
The connection to the chimney must be sealed and the fittings and pipes recommended
by us must be used (CE marked in accordance with EN1856-2 with the minimum requisites:
T200 and P1).
You must ensure that a windproof chimneypot is installed in accordance with the regulations
in force.
This type of connection guarantees smoke expulsion even in the event of a temporary
power cut.
5.7 OPERATING PROBLEMS RELATED TO DRAUGHT DEFECTS IN THE CHIMNEY
Among all the weather and geographical conditions that affect chimney operation (rain, fog, snow, altitude
a.s.l., exposure to sunlight, orientation to the cardinal points, etc.), the wind is certainly the most determinant.
In fact, besides the thermal depression caused by the difference in temperature between inside and outside
the chimney, there is another type of depression (or overpressure): dynamic pressure caused by the wind. An
updraft always increases depression and therefore the draught. A horizontal wind increases depression provided
the chimneypot has been installed properly. A downdraft always decreases depression, at times inverting it.
Fig. 4 - Example of depression
LEGEND
A Less favourable points
B Most favourable position
Besides the direction and force of the wind, the position of the chimney and the chimneypot with respect to the
roof of the building and the surrounding landscape is also important.
The wind also affects chimney operation indirectly by creating overpressure and depression zones within the
building as well as outside. An internal overpressure can be created in rooms that are directly exposed to the
wind (2), which can enhance the draught in stoves and fireplaces, however, it can be counteracted by the
external overpressure if the chimneypot is situated on the side exposed to the wind (1). On the other hand, a
dynamic depression can be created in rooms that are opposite the wind direction (3), which competes with the
natural thermal depression generated by the chimney, however, this can be compensated for (sometimes) by
placing the smoke duct opposite the wind direction (4).
IMPORTANT!
The operation of the pellet product is significantly affected by the chimney layout and
position.
Hazardous conditions can only be resolved by qualified personnel setting the product
appropriately.