3.7 Firewood consumption
The table below indicates the heating value of the different wood types. This concerns pure wind dry
wood with a moisture level between the 12% and 15%.
Wood type Heating value/kg (kWh)
Birch
4,3
Beech
4,0
Oak
4,2
Ashen
4,2
Larch
4,4
Robine
4,1
Fir
4,5
Spar
4,5
The details above combined with the efficiency and power of the stove, allows for a calculation of the
wood consumption. Below you will find a more extensive example based on the use of beech wood.
Calculation example:
Heating value 1 kg beech
= 4,0 kWh.
Efficiency Retro
= 78,5%.
Rated power
= 7,0 kW.
Efficiently utilized heating value = 4,0 x 0,785 = 3,14 kWh.
Wood consumption per hour
= 7,0 / 3,14 = 2,2 kg.
3.8 Safety
With a RENY wood stove, you have purchased a comfortable and safe heat source. The fire safety starts
with a proper installation and a correctly working chimney. In addition the following points are important
when it comes to to safe heating:
• Do not place any inflammable objects within 80 cm in the radiation area of the device. Be careful
with regard to decoration close to the stove.
• For safe operation, a distance of 20 cm between the side and wall and 15 cm between rear and
wall needs to be observed.
• In case of an inflammable floor, a fire proof heating plate must be applied underneath the
device. Towards the front and side, one must observe a minimal distance for the heating plate of
respectively 50 and 30 cm with regard to the stove.
• When using your stove, the outside will get hot. When operating the stove you should use the glove
included. Protect yourself and others (children!) from getting burnt. Don’t leave children alone with a
burning stove.
• Be careful regarding to clothing. Synthetic clothing in particular may easily catch fire and burn
intensely.
• Prevent inflammable materials or liquids from being placed in the vicinity of the device. Working with
solvents, glues etc in the area where the stove is burning, may be very dangerous.
• Know the condition of your smoke channel. Tears in the channel may cause critical moisture, pollution
of the walls, penetration of smoke, but it can also impede the drainage of flue. Please request profes-
sional advice from your dealer or a specialized company.
• Prevent chimney fire. Have the smoke channel swept clean at least once a year, and more often
if it is used intensely. Prevent excessive soot within the channel, therefore never burn freshly chopped
wood, but always clean and dry split wood.
• Never use the stove as a barbecue. This causes (flammable) grease deposit in the channel and
accelerates the process of the channel getting silted up. Prevent pollution of the channel (bird nests
etc), by placing a proper hood on the chimney.
• Follow the directions of the local fire department. The stove can only be used if all national and local
installation directives, directives of the local fire department and the necessary architectural
provisions have been met.
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