Burning Instructions And Tips; Fuel - Dik Geurts Bora EA Bedienungsanleitung

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3. Burning instructions and tips

Below you will find tips and instructions that are important for a good operation of your fire.

3.1 Fuel

Good fuel is the 'engine' of your fire. You will benefit the most from your fire, if you burn it with high quality, well
dried wood or wood briquettes. In this way you will prevent unwanted additional effects like excess smoke
formation as a result of poor combustion, insufficient heat yield and poor efficiency. The fire is only suitable to be
filled with clean wood or wood briquettes.
Wood is usually purchased in cubic metres. However, there are many types of 'cubes' available on the market:
• A genuine cube (neatly stacked sawn and split wood): 1.0 m
• A bulk cube (wood loaded in 1 m3 trays): 0.6 m
• A stere (neatly stacked one metre sections): 1.3 m
Dry wood
Wood must be properly dry. Freshly felled wood is not suitable, as it contains too much moist (approx. 60%).
Moist wood will generate a dull sound when you hit two blocks against each other.
Therefore, you should allow the wood to dry for at least one year, and preferably for two to three years. The wood
will dry if you store it outside under a lean-to (i.e. not in the garage), preferably in a sunny location. This will allow
the wind (but not the rain) to get to it. Short, split stems will dry the quickest. After drying, they only contain 15 to
20% moist and will provide the highest output.
Dry wood will generate a bright sound when you hit two blocks together. At the front side there will be shrinkage
cracks and the bark will come loose easily.
We recommend using a moisture gauge to measure the moist percentage of the burning wood. It will be available
at your supplier.
In order to determine the moist percentage correctly, please pay attention to the following:
• First allow the burning wood to reach room temperature.
• Always measure in the core of the wood block.
• This is why you should always cleave a wood block through the middle first.
• Press the moisture gauge's measuring pinsdiagonally on the grain,uprightandfirmly in the middle of the
freshly cleaved surface.
There is no point in measuring at the cross-cut of the wood or parallel to the grain.
• Naturally dried burning wood can be drier (but also more moist) on the outside than on the inside.
• Oven dried burning wood is often reasonably dry on the outside, but not yet in the core.
This burning wood often requires a few more months in order to fully dry.
• The measurement provides an indication. In order to get a more accurate picture, the measurement should be
repeated on several places (and perhaps on various wood blocks).
• The burning wood may have a maximum moist percentage of 20%. If the wood is too dry, i.e. below a moist
percentage of 10%, it will quickly gasify and overloading could occur, particularly in the case of lighter wood
types.
3.1.1 Amount of wood
You must observe the recommended volume of wood blocks (number AND dimensions) provided in Appendix 1,
Table 2 (page 74). When a larger volume is used, the heat delivery will increase. In that case, the fire could get
overloaded, as a result of which parts could get damaged and/or the walls of the fire will discolour. The glass pane
could also blacken sooner. If the fire is burning too hard, you should use coarser/harder wood.
Gross, 1 kg of dry burning wood will supply approx. 4 kWh (kilowatt hour) of energy.
The capacity of your fire can be seen in the installation manual in appendix 2 and on the data plate.
3.1.2 Suitable types of wood
The following types of wood are recommended for burning your fire:
• Hard types of wood such as oak, beech, hornbeam, ash and fruit tree wood. These types of wood generate a
short flame and will burn longer.
• Light types of wood such as birch, poplar, willow and alder. These types generate a long flame but burn up
rather quickly.
• Coniferous or pine wood. This wood should only be used in a well burning fire, because otherwise you will get
deposits in the flue duct. It is not really suitable for open fires, because of the sparks. Pine is often used as
kindling wood.
• Wood briquettes (compressed wood chips) are not to be burnt in a smoke control area.
3
(approx. 700 kg).
3
(approx. 400 kg).
3
(approx. 900 kg).
UK