Nuances of installing the chimney in the home.
All types of chimney systems differ in two main features:
first - the material from which the chimney is made;
second - the method of installation of the entire structure, depending on the foundation for the chimneys.
According to the material, chimneys are classified into two groups:
- brick constructions;
- metal chimneys.
According to the method of installation on the foundation, the smoke extraction system is divided into three main categories:
- - the chimneys are installed on the base, which is placed on top of the device, as if they are mounted on it and the pipe itself crosses the ceiling;
- root - chimney and hearth have a common foundation;
- facade - installation of chimneys of this type implies the removal of pipes outside the house, along its facade.
Such smoke extraction systems help to solve the problem of not only the cleanliness of the air in the room, but also allow you to choose the optimal design for the individual design solution.
Construction of chimneys does not require knowledge of special technological processes, and can be carried out with the hands of an ordinary owner of the household house. But even when using the simplest technologies, it is necessary to take into account certain nuances on which the quality of the entire structure depends. When installing the smoke extraction system, it should be noted that: 
- the height of the chimney should be at least 0.5 m above the ridge on the roof of the house. With a shallow roof it is necessary to optimally reduce the distance between the chimney and the top of the roof, this will allow to significantly reduce the height of the pipe itself;
- when installing a fireplace or oven chimney, one should take into account the fact that the temperature of the smoke passing through the structure can reach a value of 800 ° C.Any material after such heat exposure for a long time may lose its strength characteristics, and burn out. Therefore, the design of the chimney, especially the metal, must be demountable in order to be able to replace the lower section. However, if you have purchased a chimney made using the technology of lining the inside surface of a chimney, you do not need to take care of the quality of the metal. This worried producers, but the price of such an improved device is higher than that of a conventional one. The
- chimney device must be designed according to the principle of "one heat source - one chimney".You can not connect the second hearth to an existing branch, since this will significantly reduce the thrust in both channels.
- there is a standard value of the minimum dimensions of the chimney - 140mm × 270mm. Of course, these parameters can be increased, but it is impossible to reduce the declared dimensions, since there simply will not be traction in the chimney.
We install the foundation for the chimney.
You need to start building the chimney from the foundation. The basis for the chimneys can be: 
- concrete slab, thickness not less than 10cm;
- brick foundation, which uses the technological process of continuous single-layer masonry.
Please note - the foundation for a brick chimney located inside the building may be below the floor level by 50 cm. When the chimney is taken out of the walls of the house, the foundation of its foundation must be at the level with the foundation of the house.