13. AIR ENTRANCE INTO THE INSTALLATION
PLACE DURING COMBUSTION
As the stoves take their combustion air from the installation place, it is essential that
a suffi
cient quantity of air is introduced in the installation room itself.
In case of hermetic doors and windows (for example houses built according to the
energy saving criteria) it is possible that the air entrance is not guaranteed, compromising
the draught, the welfare and the security of the people. It is necessary to guarantee a
further air entrance through an external air intake which is to be positioned nearby
appliance or through air connection towards outside or near the ventilated room.
The entrance of air for combustion into the installation place must not be closed
during the operation of the stove. It is absolutely necessary that in the environment in
which the stove operates there is suffi
cient air for combustion, i.e. up to 20 m3/h.
An extraction hood (aspirator) installed in the same room or in a room nearby,
causes depression which causes bad combustion and smoke inhalation with hazardous
consequences to people.
14. ALLOWED/FORBIDDEN FUEL
The allowed fuel is made of wood logs and dark coal. One must use only logs of
dry wood (water content max. 20 %).One must load at maximum 2 or 3 logs of wood
simultaneously. The wood pieces should have a length of 30-40 cm and a maximum
circumference of 30-35 cm.
The wet wood makes ignition more diffi
cult because it requires a greater quantity
of energy to evaporate the existing water. The humid content has the disadvantage that,
with the temperature lowering, the water condensates fi rst in the hearth and then in the
chimney.
Among the others, the following cannot be burnt: remainders of coal, scraps of
bark and panels, humid wood or treated with varnishes, plastic materials, materials
of organic origin; in this case the warranty on the equipment expires.
Variety
Kg/m
3
Kwh/Kg moistness 20%
Beech
750
4,0
Oak
900
4,2
Elm
640
4,1
Poplar
470
4,1
Larch*
660
4,4
Spruce*
450
4,5
Scots pine *
550
4,4
* wood not suitable for burning
Paper and carton must be used only for ignition.
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