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Page 15
Installation and operation manual - Bistro woodburning cookstove
ENGLISH
3.2 Gas path
FIGURE 8
Figure 11: Gas path
The gas path is in fact the circuit followed by the hot gases emitted by burning wood. This circuit
is used to heat the stainless steel oven and the cast iron cooking surface.
1. The primary air supply provided by the pilot feeds the wood combustion.
2. Wood burning in the combustion chamber gives off particles and hot gases heading upwards.
3. The secondary air supply from the tubes at the top of the combustion chamber burns a second
time gases and particles. This process makes the combustion cleaner and allows to regulate the
efficiency of the fire.
4. The gases burned twice are then guided by the baffle towards the front of the combustion chamber.
5. The gases then divide in two, passing through the ducts to the left and right of the oven and
joining between the oven and the cooking surface. This portion of the journey is the one that
allows for gases to transmit their heat to the oven and to the cooking surface. The path borrowed
by gases has an impact on heat distribution. For example, if the fire is further to the left in the
combustion chamber, the heat released may pass more through the ducts to the left of the device.
The temperature of the cast iron cooking surface may therefore vary according to the path taken
by the gases. On the other hand, the oven tends to keep a relatively uniform temperature thanks
to its insulation.
6. The gases finally escape through the chimney.
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