Self-venting means that the house is built so that fresh air flows naturally through the house. There are therefore no fans driving the air in any direction. The natural ventilation or self-venting is the most common way to ventilate a house in Sweden, and the engine in the system is the stack of dust.
The system of self-sufficiency is as simple as it is safe. No expensive installations or electric shutters are needed to get fresh air in the house. It takes care of itself. On the other hand, it can be difficult to get the system perfectly dimensioned, especially as self-esteem tends to vary during the year. Sometimes the ventilation gets a little cool, and sometimes the exchange of air may be too small. However, this can often be solved with quite simple means.
In a self-draining house, the air enters through slots and valves in the walls. In the past, the houses were built a little less dense than we do today, and then the slopes were used for air intake. Today, use valves as a supply air fan.
The air then goes through the house and above all through an imchal in the chimney nook. When burning, the chimney warms up and then the ventilation is operated in the house, which gives a good air flow. Some air also exits air through the exhaust air duct of the bathroom and the kitchen, but the large air mass moves through the chimney.
The self-reliance is based on differences in temperature between the air and inside. The system thus works best during the cold winter months. But it also works well in the summer if the house is used. It can help light up a fire in the evening if the spirit falls on. Then the chimney dust and airflow heat up. If the channel is blocked for some reason, the system stops functioning. The chimney sweeper can help clean up the channel again.
Here you can see the different names the chimney channels have. A chimney can have more channels than this illustration shows.
Changing anything about the density or warming of a house of self-sufficiency is for reference. Additional insulation may cause the air to be swept, changing heat source from wood fire to other forms of heating may cause the air in the duct to become too small or the air currents in the house change. The hot chimney dust no longer draws the same amount of air as before.