The chimney is an integral attribute of the fireplace or stove present in the house. The construction of the chimney is a very time-consuming and responsible process, requiring special skills. Poorly executed construction or improperly selected height can not only begin some of the following problems during use, but also become a source of danger to those in the house people. We will consider how to calculate the required chimney height, and what errors are best avoided in the design or construction process.
So, preliminary planning provides for such types of calculations as: mathematical, graphical and aerodynamic. A calculation error can lead to the fact that an inappropriate chimney height will reduce heating efficiency, allow smoke and carbon monoxide to enter the room, and also contribute to a possible fire.
Mathematical calculation:
- This method allows you to determine the required height of the chimney based on its location in relation to the ridge. So, if the gap from the pipe to the ridge is equal to or less than 1.5 m, then the height of the chimney should be increased;
- It is not permissible to use a chimney whose height exceeds the top point of the house less than 0.5 m;
- In the event that the distance from the pipe to the chimney is less than 1.5-3 m, it is allowed that the chimney is flush with the ridge of the roof of the house;
- Exceeding the distance of more than 3 meters requires the chimney to be placed 10 ° lower than the ridge.
Graph computing
This method involves the mandatory execution of the drawing with an exposure of all proportions. A line drawn from the ridge on the diagram at an angle of 10 ° allows you to determine the estimated location of the future chimney. By converting the result to a natural scale, you can easily determine which chimney height is not suitable and which will be optimal.
It is important to remember that the distance between the chimney and the roof surface must not be less than 50 cm.
Aerodynamic calculation
This method is regularly used to calculate boiler pipes. Using a certain formula with values of fundamentally important parameters allows you to most accurately set the required height of the chimney pipe.
Summing up, I would like to note that the height of the pipe is one of the criteria for a quality chimney. It is important to remember that they play an equally significant role: the material selected for the construction, the permissible degree tilt, traction, protective umbrella, masonry density and many other factors affecting the functioning of the whole system.
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