The chimney for a gas boiler in a private house must be equipped according to certain rules. The part that rises above the surface of the roof is just a small visible element of a rather complex mechanism. The pipe is responsible for the discharge of gas and smoke. Homeowners must be familiar with the installation of the chimney in their own home. This will allow the correct operation of the heating system. If you are only going to make the arrangement of gas heating, then initially you need to determine the type of chimney and get acquainted with the strengths and weaknesses of each solution.
Which chimney to choose
If you will equip a chimney for a gas boiler in a private house, then for a start you should make a choice. Classic brick options have long been abandoned by specialists and private homeowners. This design is complex, high cost, and the construction takes a fairly impressive amount of time. In addition, the brick chimney is inferior in performance to modern designs.
Using stainless pipe
The chimney for a gas boiler in a private house can be made of stainless steel. In the building materials store you can find a wide range of models. Among the advantages can be identified resistance to mechanical damage, as well as the effects of aggressive substances. Such designs are made in the form of sandwich systems, which assume the presence of two pipes of different diameters. The full space is filled with basalt heat-resistant cotton wool. Such products are characterized by reliability, and they look very presentable. To date, a chimney made of stainless steel, made like a sandwich, acts as one of the most successful solutions.
Using a coaxial chimney
The chimney for a gas boiler in a private house can be coaxial. It cannot be confused with any other design. A distinctive feature is an attractive appearance. It is worth recognizing that the operating parameters are at a high level. Such products have a specific shape, and condensation cannot form on internal surfaces. This circumstance is most important for systems that operate on gas fuel.
Using a ceramic chimney
The installation of the chimney for a gas boiler can be carried out using a ceramic design. Such solutions today do not enjoy much attention from buyers who are in the elite construction segment. However, if you aim to establish a reliable, fireproof and affordable chimney, then besides the ceramic design there is no other alternative today. Among other things, such products are easy to install.
Requirements for the installation of the chimney of a gas boiler
The pipe for the chimney of the gas boiler must be equipped in accordance with the rules that are prescribed in SNiP 2.04.05-91. Otherwise, the device will be carried out incorrectly, therefore, the connection will be made with violations. All this calls into question the safety of operation. When carrying out work, it is important to ensure good traction, which will guarantee the efficiency of thermal energy. In order to prevent excess moisture from accumulating on the walls of the chimney channel, it is necessary to properly equip the design of the condensate collector. Among other things, do not install fungi, as well as deflectors on the top of the chimney. These components can reduce the efficiency of removal of combustion products. If such elements have a place to be, then carbon monoxide can get into the room .
Installation of a chimney for a gas boiler requires maximum attention to the work. Particular emphasis must be placed on the snug fit of structural elements in those areas where the connection was made. You should try to achieve maximum tightness. This eliminates the penetration of hot gases outside the chimney. If the heating system has several units, then common connecting flue pipes can be used.
Installation of the chimney inside the building
Chimneys for boilers are installed both outside and inside the building. In order to understand what the difference is, a comparative analysis is necessary. Thus, the internal chimney does not require thermal insulation if all rooms are heated. A chimney will pass through them, and only the outer part of the pipe will need to be insulated.
As for the external chimney, the insulation must be fully equipped. Internal chimneys have a high risk of carbon monoxide entering the room. This indicates an increased fire hazard.
If we talk about external structures, they are characterized by a high level of safety during operation. Inner pipes have many various components that differ from each other in design features. This will certainly lead to certain difficulties during installation. The opponent’s components are very similar, which ensures ease of installation. Internal chimneys are quite difficult to repair. The outdoor chimney is easy to repair, whatever the problem.
Features of the device of the internal chimney
When internal chimneys for boilers are arranged, then initially you should markup in the roofing cake and ceilings, which will allow you to make holes. The correctness of these works should be analyzed several times. Only after that you can start cutting the opening. The pipe that leaves the heating equipment must be connected to the adapter adapter. Next, the revision and tee are connected, the metal sheet is fixed, and the main bracket is also mounted. When building pipes, it may be necessary to use elbows.
It should be stocked with a special pipe if it is intended to install through the ceiling. It is necessary to put on a galvanized sheet on the pipe, in which a hole of a more impressive diameter should be made in advance in comparison with the chimney. Galvanization should be fixed to the overlap. In order to make the docking more reliable, use clamps that are tightened with good wire or bolts.
Final work
The rules for installing a gas boiler in a private house involve fixing the chimney with wall clamps. They are installed at a distance of 2 meters from each other. Among other things, it is recommended to use brackets in increments of 4 meters. To complete the construction, a special tip should be used, which has a conical shape. At the last stage, insulation work is carried out in the chimney area.
Additional requirements for the chimney
The rules for installing a gas boiler in a private house provide for compliance with all the requirements that apply to the chimney. To exhaust gases and supply air to the boiler, special equipment must be used. Outwardly, it looks like a shaft, in the inner space of which a pipe is installed. The installation of the chimney must be carried out strictly vertically. The presence of narrowings and extensions within the channel is completely not allowed.
The device involves the use of exclusively non-combustible and non-consumable materials. The structure should not have cracks or any mechanical damage through which combustion products can leak into the room. During installation, only high-quality sealants that are resistant to high temperatures should be used. The pipe height and diameter must correspond to the output parameters of the boiler. Otherwise, it will not be possible to achieve sufficient traction.
As mentioned, the chimney can be both internal and external. There are standard schemes for connecting. If you have to choose an option that is not considered standard, it must comply with the regulations. Any connection system provides a bias towards the boiler of the horizontal section of the chimney within 3 degrees and higher by one meter.
Chimney connection to a gas boiler
Chimneys for gas boilers, the price of which can vary from 700 rubles per 1 meter, are not connected according to the scheme, which involves the connection of several heating devices by combining the pipe to one chimney. In this case, the products of combustion can get into the room. It is forbidden to connect elements that consist of asbestos, galvanization, brick and aluminum. As an optimal chimney height, a parameter within 5 meters or more acts. If we are talking about a flat roof, then the chimney device involves the elevation of the element above the surface by 1.5 meters.
As for the height of the pipe, the axis of which is 3 meters from the roof, this parameter should be determined by the level of the ridge. If the pipe rises above the last element by more than 2 meters, then additional fixation should be made using building braces.
Chimney outlet
The diameter of the chimney for the gas boiler must correspond to the output parameters of the heating equipment. In order to bring the element out, you should mark the area, and then check the dimensions of the pipe by comparing them with the markup. Only then can you start making holes. A passage element should be connected to the boiler branch pipe, leading the pipe out into the street. For transition it is necessary to apply a branch pipe. The hole in the wall and the pipe fragment that passes through it should be well insulated.
When chimneys for floor gas boilers are discharged, a tee with revision should be installed, and then put on a plug. The master must build up the pipe, gradually connecting the links to it. The design should be attached to the wall in increments of 2 meters. Fastening should be strengthened with clamps.
Once the desired height has been gained, a cone-shaped tip should be installed. If the outlet channel was formed from a sandwich material, then thermal insulation is not performed, if it is not, then such manipulations should be carried out. The chimney for a wall-mounted gas boiler must, first of all, be safe as well as efficient. Only after that you need to think about the aesthetic appearance of the product. If you are not confident in your abilities and strengths, then it is preferable to entrust the connection to professionals in their field, this will provide a security guarantee.