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14
Brick wall or roof
30
100
120
Table 2: Thickness of insulation for wall or roof system
It is important to ensure PERFECT CIRCULATION of air (ventilation) in the exhaust pipe. The smoke should not
be hindered by narrowing or angled components. All changes in direction of the axis should have a slope of up
to 45 degrees relative to the vertical line. 30 degrees is the best possible solution. The changes in direction are
best made at the top of a chimney that is resistant to high winds.
The distances must be taken into account in accordance with applicable provision (
chimney top, resistant to
high winds, distances and furnace position
), as present in table 3:
Roof inclination Distance between ridge and chimney
Minimum chimney height, measured from top
opening (at the chimney exhaust)
α
Distance in m
Height in m
15 °
Less than 1,85 m
More than 1,85 m
0,50 above ridge top
1,00 from roof incline
30 °
Less than 1,50 m
More than 1,50 m
0,50 above ridge top
1,30 from roof incline
45°
Less than 1,30 m
More than 1,30 m
0,50 above ridge top
2,00 from roof incline
60°
Less than 1,20 m
More than 1,20 m
0,50 above ridge top
2,60 from roof incline
Table 3
It is necessary to ensure one initial vertical extension (1,5 m in length, min.) in order to allow proper smoke
extraction.
2.4
AIR SUPPLY FOR COMBUSTION (Figure 8)
The air from the environment needed for combustion has to be supplied through one ventilation grille attached
to the wall of a room or space, facing outwards. This will ensure proper combustion. The ventilation hatch must
be installed on the outer wall. The ventilation hatch must have a ventilation grille, which protects the opening
from rain, winds and insects.
The opening must be installed on the outer side of the wall of the room or space that houses the furnace.
It is forbidden to supply air for combustion from garages, storage rooms used for flammable materials or
spaces with high risk of fires.
The hole or opening for funnelling off external air for combustion may be provided with an
Ø
50 pipe, max.
length of 3 m. The air supply for combustion must provide enough air (needed to ensure proper functioning
of all devices), if the room has any other equipment for combustion.