2.3 BUYING FIREWOO D
Where can I get my rewood?
BUYIN G READY-TO-B URN FIRE WOOD
Regenerated ready-to-burn rewood
can be purchased from dealers:
• stove-ready, stored for at least two
years
• predried, stored for one year
• fresh from the forest
Every dealer has a wood moisture meter that they use to test the wood they
buy. The ideal residual moisture is 12–
15% and should be no higher!
TREATI NG FIREWO OD YOUR SELF
Unseasoned wood can be purchased
from the forestry ofce, owners of
woodland, or the community:
• trunks lying in the forest
• seasoned trunks by the wayside
Whether you have cut your own wood
or bought it, the important thing is:
the wood should be dried for at least
two years before it is burned!
2.4 DRYING AND STORING
WOOD
DRYING
The water content of rewood has a
great effect on its burning properties.
Your wood should be as dry as possible. Only then can it give off much heat
and burn without polluting the environment. Freshly cut wood can contain
between 45 and 60% moisture depending on the season and type. After
the optimal drying this water content
drops to below 15%. Depending on
the wood type this can take about two
years, and even longer for some kinds.
STORAGE
If
rewood is to dry thoroughly, it must be
cut into small pieces.
Check this yourself: the circumference
should be max 20–25 cm. Store the
wood out of doors, protect it from rain
and snow, and make sure it is well ventilated.
2.5 WOOD TYPES A ND
C ALORIFIC VALUE
The caloric value describes the heat
energy released when one kilogram
of fuel is burned under specic conditions.
The caloric value is based on the volume specied in stacked or solid cubic
metres.
The various wood types have various
caloric values:
Damp wood da mages
your stove and reduces
the c alorifi c value!
!
What you must not
burn: refuse, wet wo od,
briqu ettes!
!
A TONWE RK STORAG E HEATING
STOVE C AN BE FIRED WIT H ALL OF
THE A BOVE WOOD TYPES.
The values are based on 15% residual wood moisture!
The many oils and
resins in larc hwood also
provide for an a coustic
fireworks!
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2.7 WHAT HAPPENS WHEN WOOD BURNS
Burning or combustion is a rapid oxidation of substances forming ames. When wood
burns, the oxygen in the air combines with the carbon and hydrogen in the wood. In
the process, energy is released in the form of heat and light. In the ideal case the
products of complete combustion are only carbon dioxide, ashes (formed primarily of
the wood’s mineral constituents), and water.
The combustion process on rewood can be divided roughly into three phases.
Heating and drying – In this rst phase the water and other volatile substances
stored in the rewood evaporate.
Pyrolysis – In this second phase the rewood decomposes at temperatures from
about 150 °C.
Actual combustion – In this third phase the gases formed in the rst two phases react with additional oxygen from the atmosphere to form carbon dioxide and water.
Also any remaining charcoal burns completely with time in the combustion zone.
Only ashes remain as the single residue of combustion. Each phase of combustion
can be observed very easily on an open re.
Burni ng wood is a
proac tive con tributio n
to cl imate p rotectio n!
i
A fir e needs three
thing s: fuel , oxygen ,
and h eat.
i
3. APPROVALS AND CERTIFICATIONS
3.1 APPROVAL
Your Tonwerk storage heating stove
has been tested under the following
standards:
EN 13240/15a B-VG
3.2 M ODEL 1 –
SELF-CLOS ING FIRING
CHAMBER DOOR
The Tonwerk storage heating stove is tted as standard with a self-closing ring
chamber door. This is an impor tant operating and safety element. The door closes
automatically as soon as it is released.
Consequently the Tonwerk storage heating stove is suitable for connection to
ues with multiple installations (several
Model 1 stoves connected to the same
ue).
3.3 SEAL OF QUALITY
On the basis of these tests the Tonwerk storage heating stove has been
awarded the following approvals:
Schweizerische Brandschutzzulassung
der Vereinigung Kantonaler Feuerversicherungen (Swiss Fire Protection
Approval issued by the Association of
Cantonal Fire Insurance Underwriters)
VKF no. Z 11753
Qualitätssiegel für Holz-Feuerstätten
der Vereinigung für Holzenergie Schweiz
(Seal of Quality for Wood Fireplaces issued by the Association of Swiss Wood
Energy Users) VHe-Nr. 0104/2
3.4 CE CONFORMITY
The manufacturer, Tonwerk Lausen
AG, conrms that the Tonwerk storage
heating stove conforms to the standards under EN 13240 and that the
quality requirements are constantly
monitored.
Rhein-Ruhr-Feuerstättenprüfstelle GmbH;
RRF-400097
3.5 RATINGS PLATE
The ratings plate can be found at the
bottom of the housing’s face.
Loose cubic metre (lcm): The loose
cubic metre is a measure for chopped
rewood that is loosely packaged for
trade and transport. One loose cubic
metre is 0.7 steres or about 0.5 solid
cubic metres.
NOTE THE SPECIFIED UN IT OF
MEASUREMEN T WHEN ORDERING!
Solid cubic metre (scm): As its name
suggests, the solid cubic meter corresponds to one cubic metre of solid as
opposed to stacked wood.
Stacked cubic metre (stcm) or stere
(st): A stacked cubic metre or stere
corresponds to one cubic metre of
stacked wood including the gaps between layers. One stere equals 0.7
solid cubic metres.
2.6 UNITS OF MEAS UREMENT FOR WOOD
TREE
CALORIFIC VALUE
Hardwoods
beech, oak, locust
2100 kWh/stcm
birch 1900 kWh/stcm
sycamore 1900 kWh/stcm
Softwoods
Douglas r, pine 1700 kWh/stcm
larch 1700 kWh/stcm
spruce, r 1500 kWh/stcm
1 solid cubic metre – 1 scm
1 stacked cubic metre/
stere – 1 stcm
1 loose cubic
metre – 1 lcm
1 fm0.7fm0.5 fm