EN | 46
EN
cess and does not constitute a reason for reclamation.
If the following points are taken into account, the black surface colour will
remain intact for a long time:
• Operation as intended with the recommended filling quantities (surface
temperature of fireclay < 700° C).
• No treated or coated wood, coal or liquid fuels; only natural wood with
residual moisture < 20 %.
• Do not clean the surfaces with steel/wire brushes or cleaning agents.
Door sealing ropes
BRUNNER is using only high-quality door sealing ropes, which are exactly
adapted to the requirements of our heating devices.
Yet the door sealings are wear parts, and therefore are not covered by our
product warranty.
If the stove is operated as intended, the normal lifetime will be significantly
longer.
Overheating, due to loading more wood as described in the operating
instructions, direct contact with the glue, as well as use of unsuitable and
aggressive cleansing agents may reduce the product lifetime considerably.
Glass pane
When loading wood into the fireplace, make sure to avoid the falling of
wood onto the viewing glass, where it could burn in contact with the glass.
The resulting thermal stress could lead to permanent discolorations (grey
stains) on the viewing glass.
05 FUEL AND HEATING POWER
The standard combustion process "green"has been optimized to enhance
their performance and reduce emissions. You can support our efforts to
protect our environment by respecting the following recommendations for
low-emission heating: Use only dry, natural wood with a residual humidity
factor below 20 %, or wood briquettes according to DIN EN 17225-3.
Damp, freshly cut or improperly stored wood has a high water content,
therefore does not want to burn, makes a lot of smoke and gives not much
of heat. Use only firewood which has been stored for at least two years in
a dry place with sufficient air circulation. Because dry wood is much more
calorific, you can save on fuel costs.
For example: Dry wood has a calorific value of approx. 4 kWh/kg, freshly
cut wood only 2 kWh/kg. You will need twice the amount of wood to achieve
the same heating power.
Water content
g/kg wood
Calorific value
kWh/kg
Consumption-
raised by %
very dry 100 4,5 0
stored for 2 years
200 4,0 15
stored for 1 year
350 3,0 71
freshly cut wood
500 2,1 153
Natural firewood (left) is the best fuel for fireplaces, but you can use also wood bri-
quettes according to DIN 17225-3, Class A1, length > 14 cm (5.51 in), diameter > 8 cm
(3.15 in) (right)
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