9
DA
SMER
DIMA
NE
Figure 7. Manner of installation of the flue pipe
Thickness of the insulation
mm
Diameter of the smoke exhaust pipe (mm)
D.80
D.100
Diameters of holes (openings) which should be
made (mm)
Walls made of wood, or in any case
flammable, or parts that are flammable
100
150
170
Concrete wall or roof
50
100
120
Wall or roof of bricks
30
100
120
Table 2: Thickness of insulation for part of a system which passes through a wall or a roof
Above all, it is necessary to enable PERFECT AIRFLOW (draft) in the smoke exhaust pipe which must be free with
no obstacles such as different narrowings or corners. All displacements of the axis must have one path tilted with a
maximal angle of 45 degrees from the vertical, and 30 degrees is the best solution. The best would be to make this
displacement close to the flue top which is resistant to wind activity.
According to the
regulations (flue top resistant to wind, distances and placement of the stove)
the distances
shown in table 3 must be fulfilled:
Roof slope
Distance between the ridge cover and the flue
Minimal height of the flue measured on the
upper opening (at the exit from the flue)
α
Distance in meters
Height in meters
15
0
Less than 1.85 m
More than 1.85 m
0.50 above the ridge cover
1.00 meter from the roof slope
30
0
Less than 1.50 m
More than 1.50 m
0.50 above the ridge cover
1.30 meters from the roof slope
45
0
Less than 1.30 m
More than 1.30 m
0.50 above the ridge cover
2.00 meters from the roof slope
60
0
Less than 1.20 m
More than 1.20 m
0.50 above the ridge cover
2.60 meters from the roof slope
Table 3
However, it is compulsory to provide one initial vertical extension (continuation) of 1,5 meters (minimum)
in order to provide proper exhaust i.e. extraction of the smoke.
3.4 SUCTION OF THE COMBUSTION AIR (figure 8)
The air required for combustion, which is taken from the environment, must be regenerated by means of one
ventilation grate positioned on the rom wall, that is, the room directed towards outside. This will enable better
combustion, thus less consumption of pellet biofuel. It is not recommendable to intake the external air directly
through the pipe, because this will reduce the efficiency, that is, the performance of the combustion. The ventilation
opening must compulsorily be equipped at the external side with one ventilation grate such as protection from rain,
wind and insects.
YES
Smoke
direction
NO