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INSTALLATION
&
USAGE
MANUAL
FIREPLACE
| MENTOR Hydro
2 |
Page
There are three basic rules to follow when storing wood:
Allow air circulation by piling the wood alternately (one layer across
–
one layer
widthwise), if possible.
Protect wood from rain and snow by covering it with a tarp or woodshed roof. Otherwise,
place it under a shed with a wooden roof.
Pile wood off the ground on scrap lumber or wooden pallets.
The time-honored way to cure wood is to buck, split, and stack wood off the ground for
one full year. Although wood can generally be reduced to 20 per cent moisture content
in two to three months, the ideal 10% to 15% may take longer (almost 18 months).
2.4.
Wood types and calorific value
A wood’s efficiency does not depend only on its type, but
also on its humidity, as well as the temperature of the
combustion chamber.
For more efficient and longer burning, without emission of
hazardous substances, woods must be dry. Ideally, their
humidity percentage must not exceed 10% to 15%.
If this percentage is over 20%, the wood is not burned
properly, whereas if the piece of wood has been cut
recently, the humidity is over 60% making it unsuitable for
burning. The reason for that is that the fire will be weak and
pale and will produce dense smoke, unburned tar and
creosote, soiling the ceramic glass and the flue.
It is preferable to get your wood supplies during the summer months and store them, to ensure better combustion
quality during the winter.
Useful tips
Always choose dry firewood.
Avoid wood that pops (chestnut, conifers such as cedar, spruce and pine), as they may damage your fireplace or the
flue.
Pay attention to the size of the logs. Good firewood must have been cut at least twice.
You should prefer oak, beech, olive wood, which is hard wood with high density since they will burn for longer.
Briquettes
They ignite very easily, and burn slowly. They are economically advantageous because you will burn smaller quantities
compared to common firewood and they are easily stored. Also, you have less quantity of ashes in comparison to
wood.
Birch
It’s a soft wood that ignites easily with great thermal energy production. It produces less smoke and ash compared to
other wood and burns silently. The same characteristics apply for lime and chestnut.
Beech
Hard wood is ideal for firewood but requires a high temperature to ignite. It weights a lot; it is dense and burns with a
calm and long fire for a longer time. Best when well seasoned. The same applies for oak, but seasoned for 2-3 years.
Every type of wood has its own calorific value.
Wood type
Briquette
Birch
Walnut
Oak
Beech
Fir
Common Oak
Pine
Olive
Calorific value
(Kcal/Kg)
5.000
4.800
4.731
4.619
4.578
4.588
4.548
4.457
4.100
860Kcal/h = 1
kW/h
Table 2.4.1
The values are based on 15% residual wood moisture.
An ARTE
®
fireplace can be fired with all of the above wood types.
WET
DRY
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