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9-CHOICE OF FUEL
Technical Dept. - All rights reserved - Reproduction prohibited
FUEL: Wood
In order to achieve maximum efficiency from your product, it is of utmost importance to
use wood with suitable characteristics
.
We recommend using
heating wood such as
oak-beech-ash-robinia-common oak or non-resinous pressed wood logs.
The
latter has a high calorific value and must be used with caution to avoid harmful overheating of the product.
Fuels such
as poplar-pine-lime-chestnut-eucalyptus-myrtle have a low calorific value as they are soft wood, i.e. tender. The moisture content is
fundamental for all types of wood listed.
By using wood with a higher moisture content, most of the energy content of the fire will go to drying the water. Using moist wood also
leads to poor combustion, soot and tar deposits in the flue which, in the worst case scenario, can catch fire. Other inconveniences are soot
deposits on the glass of the product and creating an issue for the neighbours.
Attention!
It is strictly forbidden to use fossil fuels, impregnated, painted or glued wood, sheets of particle board, plastic or
colour magazines as fuel. During combustion all of the above products develop hydrochloric acid or heavy metals,
which are harmful to the environment and fireplace.
Hydrochloric acid can also corrode the steel or brickwork of the flue.
The table below provides the percentage of moisture and the calorific value of a burned 1 kg log.
The optimal condition for use and drying time of 24 months is equal to 16% moisture, with a relative calorific value of 15350 kJ/kg.
There is a significant 25% loss when the wood has a percentage of 29% with calorific value of 12200 kJ/kg.
Average moisture (%) of the wood in percentage
Wood placed in storage 3 months after cutting
Drying time
Wood
Calorific value (kJ/kg)
0 (green wood)
75%
3 months
44%
6 months
29%
12200
9 months
26%
12 months
25%
13250
18 months
17%
24 months
16% OPTIMAL
15350
30 months
15%
•
the type of wood: only use virgin wood, uncontaminated and get information on the properties of the wood and its proper seasoning;
•
moisture: only use dry wood. Damp or “green” wood burns poorly, reduces the heat produced by the appliance and produces polluting
emissions;
•
the size: split wood is better than round logs and use even sizes logs, preferably medium-small (25-33 cm long, 5-15 cm in diameter).
CONCLUSION
The table determines the energy loss of the wood and can be summarised in a brief consideration:
losing 25% of energy is equal to losing 1 log (1 kg) out of every 4.
FUEL: Wood
In order to achieve maximum efficiency from your product, it is of utmost importance to
use wood with suitable characteristics
.
We recommend using
heating wood such as
oak-beech-ash-robinia-common oak or non-resinous pressed wood logs.
The
latter has a high calorific value and must be used with caution to avoid harmful overheating of the product.
Fuels such
as poplar-pine-lime-chestnut-eucalyptus-myrtle have a low calorific value as they are soft wood, i.e. tender. The moisture content is
fundamental for all types of wood listed.
By using wood with a higher moisture content, most of the energy content of the fire will go to drying the water. Using moist wood also
leads to poor combustion, soot and tar deposits in the flue which, in the worst case scenario, can catch fire. Other inconveniences are soot
deposits on the glass of the product and creating an issue for the neighbours.
Attention!
It is strictly forbidden to use fossil fuels, impregnated, painted or glued wood, sheets of particle board, plastic or
colour magazines as fuel. During combustion all of the above products develop hydrochloric acid or heavy metals,
which are harmful to the environment and fireplace.
Hydrochloric acid can also corrode the steel or brickwork of the flue.
The table below provides the percentage of moisture and the calorific value of a burned 1 kg log.
The optimal condition for use and drying time of 24 months is equal to 16% moisture, with a relative calorific value of 15350 kJ/kg.
There is a significant 25% loss when the wood has a percentage of 29% with calorific value of 12200 kJ/kg.
Average moisture (%) of the wood in percentage
Wood placed in storage 3 months after cutting
Drying time
Wood
Calorific value (kJ/kg)
0 (green wood)
75%
3 months
44%
6 months
29%
12200
9 months
26%
12 months
25%
13250
18 months
17%
24 months
16% OPTIMAL
15350
30 months
15%
•
the type of wood: only use virgin wood, uncontaminated and get information on the properties of the wood and its proper seasoning;
•
moisture: only use dry wood. Damp or "green" wood burns poorly, reduces the heat produced by the appliance and produces
polluting emissions;
•
the size: split wood is better than round logs and use even sizes logs, preferably medium-small (25-33 cm long, 5-15 cm in diameter).
CONCLUSION
The table determines the energy loss of the wood and can be summarised in a brief consideration:
losing 25% of energy is equal to losing 1 log (1 kg) out of every 4.
+25%
