SENKO SP - Page 9

Fireplace stove SENKO SP 8
Rising wind ALWAYS has the eect of increasing pressure or
underpressure if the chimney is installed correctly. Down wind ALWAYS has
an reduction eect of underpressure  overpressure occurs. In addition to
the direction and speed of the wind, the position of the chimney in relation to
the roof of the house and the surrounding area is also important (picture 2).
The wind aects the function of the chimney indirectly by creating zones of
high (overpressure) and low (underpressure) pressure both outside and inside
the living space (Picture 3). In rooms that are directly exposed to the wind (B),
pressure can be created that helps the chimney work better, but it can also
negatively aect the chimney with external pressure if the chimney is located
on the side that is exposed to the wind (A). On the contrary, in the rooms
located in the lee (C), a negative pressure can be created that negatively
aects the operation of the chimney, which is located on the opposite side (D)
from the direction of the wind.
Picture 2
wind
Unfavorable
position
Favorable
position
pozicija
pozicija
horizontal wind 8
m/s  negative
pressure of 30 Pa
descending wind at an angle
of 45° and 8 m/s 
overpressure of 17 Pa
zone of high
(positive) pressure
 OVERPRESSURE
zone of low (negative)
pressure
 UNDERPRESSURE
Flue gasses
from
chimney