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 removal of gas and smoke. Homeowners should definitely be familiar with the design of the chimney in their own home. This will allow the heating system to operate correctly. If you are only going to arrange gas heating, then you first need to decide on the type of chimney and familiarize yourself 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 first you need to make a choice. The classic brick options today have long been abandoned by specialists and private homeowners. This design is complex, high cost, and the construction takes quite an impressive amount of time. ExceptIn addition, in terms of performance, a brick chimney is inferior 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 get acquainted with a wide range of models. Among the advantages can be distinguished resistance to mechanical damage, as well as the effects of aggressive substances. Such designs are made in the form of sandwich systems, which involve the presence of two pipes of different diameters. The full space is filled with bas alt heat-resistant wool. Such products are characterized by reliability, and they look very presentable. To date, a stainless steel chimney, 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 also be coaxial. It cannot be confused with any other design. As 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 the internal surfaces. This circumstance is most important for systems that operate on gas fuel.
Using a ceramic chimney
Installation of a chimney for a gas boiler canproduced using ceramic construction. Such solutions today do not enjoy much attention from buyers who are in the elite construction segment. However, if you are pursuing the goal of installing a reliable, fireproof and affordable chimney, then there is no other alternative today other than ceramic construction. Among other things, such products are easy to install.
Requirements for a gas boiler chimney
The pipe for the chimney of a gas boiler must be equipped according to 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 be the key to the efficient use of thermal energy. In order to prevent excess moisture from accumulating on the walls of the chimney channel, the design of the condensate trap should be properly equipped. Among other things, you should not install fungi, as well as deflectors on the chimney head. These components can reduce the efficiency of removal of combustion products. If such elements take place, then carbon monoxide can get inside the room.
Installation of a chimney for a gas boiler requires maximum attention to the work. Particular emphasis must be placed on the density of fit of structural elements in those areas where the connection was made. You must tryachieve maximum tightness. This prevents 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 a chimney inside the building
Chimneys for boilers are installed both outside and inside the building. In order to understand the difference, it is necessary to make a comparative analysis. Thus, the internal chimney does not imply the presence of thermal insulation if heating of all rooms is provided. 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 thermal 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 distinguished by a high level of safety during operation. Inner pipes have many different components that differ from each other in design features. This inevitably leads to certain difficulties during installation. The opponent's components are very similar, which ensures ease of installation. Internal chimney pipes are quite difficult to repair. An outdoor chimney is easy to repair, no matter what the problem may be.
Features of the device of the internal chimney
When they settle downinternal chimneys for boilers, then initially markings should be made in the roofing cake and ceilings, which will allow holes to be made. The correctness of these works should be analyzed several times. Only then can you start cutting the opening. The branch pipe that departs from the heating equipment must be connected to the adapter adapter. Next, a revision and a tee are connected, a metal sheet is fixed, and the main bracket is mounted. When building a pipe, it may be necessary to use elbows.
You should stock up on a special pipe if you intend to install through the ceiling. A galvanized sheet must be put on the pipe, in which a hole of a larger diameter should be made in advance compared to the chimney pipe. Galvanization should be fixed to the ceiling. In order to make the docking more reliable, you should use clamps that are pulled together with good wire or bolts.
Final works
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 with a step of 4 meters. To complete the design, you should use a special tip, which has a conical shape. At the last stage, insulation work is carried out in the chimney area.
Additional chimney requirements
The rules for installing a gas boiler in a private house provide for compliance with allchimney requirements. To remove 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 contractions and expansions inside the channel is absolutely not allowed.
The device involves the use of exclusively non-combustible and non-consumable materials. The structure should not have cracks and any mechanical damage through which combustion products can seep into the room. During installation, only high-quality sealants that are resistant to high temperatures should be used. The height of the pipe and its 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 according to which the connection is made. If you have to choose an option that is not considered standard, it must comply with the regulations. Any connection system provides for a slope towards the boiler of the horizontal section of the chimney within 3 degrees or more by one meter.
Connecting a chimney 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 a scheme that involves connecting several heaters by combining a pipe to one chimney. In this case, the combustion productsget inside the room. It is forbidden to connect elements that consist of asbestos, galvanization, brick and aluminum. The optimal height of the chimney is a parameter within 5 meters or more. 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 located 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 to the outside
The diameter of the chimney for a gas boiler must match 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, comparing them with the markup. Only then can you start making holes. A passage element should be connected to the boiler nozzle, bringing the pipe out into the street. For the transition, a pipe should be used. The hole in the wall and the piece of pipe that goes through it should be well insulated.
When chimneys for floor gas boilers are removed, a tee with an inspection should be installed, and then put on a plug. The master must build up the pipe, gradually attaching links to it. The structure must be attached to the wall in increments of 2 meters. Fastening should be reinforced with clamps.
After the desired height has been reached, install the cone tip. If the outlet channel was formed from a sandwich material, thenthermal insulation is not performed, if it is not, then such manipulations should be carried out. The chimney for a wall-mounted gas boiler, first of all, must be safe, as well as efficient. Only after that it is necessary 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 guarantee of security.
