When equipping heating equipment that works with gas, it makes sense to equip a coaxial chimney, the installation of which will not cause complications.
Rules and regulations for the installation of any heating equipment, including solid fuel, require the mandatory installation of a suitable chimney.
Its main purpose is to provide the necessary oxygen supply while simultaneously withdrawing all combustion products.
Only the chimney can provide the required combustion of the coolant used in the boiler.
If almost any type of chimney can be used for a solid fuel boiler, then a universal coaxial chimney will be the optimal solution for a boiler that operates on gas.
Currently, more and more often such heating equipment is used, in which a closed combustion chamber is provided.
This type of boiler can be installed in almost any home, including wood.
For such boilers, the developed norms and requirements allow not to equip classical exhaust systems, which, as a rule, take up a lot of space.
In this case, it is allowed to install a coaxial chimney, which has a simpler and more compact design.
There are certain requirements that must be met if a coaxial chimney is to be installed for a gas heating boiler.
Contents:
- Principal features of
- Installation requirements
- Installation of chimney
- Advice and recommendations
Principal features of
The classic coaxial chimney has a very specific design. Any such chimney consists of individual pipes, placed one in the other, which have a different diameter.
In the internal space, these pipes do not touch each other due to the installation of special jumpers along its entire length.
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These jumpers provide not only the rigidity of the entire structure, but also give the whole system a certain strength. Pipes that have different diameters perform certain functions.
The pipe, which has a smaller diameter, is responsible for removing all combustion products from the boiler.
The pipe, the diameter of which is larger, in turn, provides the necessary amount of oxygen to the combustion chamber.
Thus, coaxial type pipes allow simultaneous flow of air and smoke from the chamber.
In this case, the air in the house does not mix with the air masses inside the boiler.
It should be noted that a special coaxial type pipe, with all its positive characteristics, is not suitable for all heating appliances.
For example, in a solid fuel boiler, as a rule, the combustion chamber is not of a closed type, which means that this pipe is not suitable in this case.
This type of flue system is suitable for those boilers that have a closed combustion chamber.
The greatest advantage of this device is its ease of installation and subsequent operation.
In addition, when installing it, there is no need to carry out work on the roof, since the pipe can be removed near the window directly into the wall.
The installation of a coaxial pipe allows completely eliminating the contact of air in the house and the combustion products from the boiler.
Also, that air that is taken from the street, enters the chamber in a preheated form, which allows you to significantly increase the overall efficiency.
Coaxial pipe for gas boiler is the best solution for any house, except it, it can be arranged in a wooden structure.
Installation requirements
Installation in a house, including in a wooden, heating equipment, which is equipped with a closed type combustion chamber, requires the mandatory installation of an autonomous heating system.
It has some differences from the system that is designed for a solid fuel boiler, which is installed in most cases only in a private house.
Existing requirements allow to install a gas boiler of this type, including in multi-apartment buildings.
Under the coaxial chimney for the gas boiler, certain standards and safety requirements have been developed, which are mandatory for everyone.
For example, the maximum permissible length of a discharge pipe of such a system should be on average up to three meters. The main pipe must be taken out to the street only in a horizontal position.
In turn, the length of the pipe section, which should be in a horizontal position, should not exceed more than one meter.
In the case when forced draft is provided due to the additional installation of fans, there is no need to install a vertical section of the coaxial tube.
The outlet for a coaxial type pipe should be located at a distance of at least one and a half meters from the boiler.
If necessary, make a longer pipe, use only a standard factory-made extension cord.
The distance of the outer part of the coaxial pipe from the base of the wall is selected at an arbitrary value.
It is also necessary to make a small slope of the horizontally running part of the pipe in order to avoid condensation in the internal space of the chimney.
The diameter of the outlet in the wall under the chimney coaxial type should be slightly larger than the diameter of the pipe itself.
For more details on how to equip a coaxial type chimney in a house or apartment, see the video below.
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Installing a chimney
In order to independently mount a coaxial chimney in a house under a gas boiler, you do not need to have any special knowledge.
The main advantage that a coaxial chimney possesses is the maximum ease of installation, unlike the flue for a solid fuel boiler.
All that is required for its arrangement is to strictly follow the recommendations of the corresponding instruction and to adhere to the current rules and safety standards as precisely as possible.
As a rule, a coaxial type chimney is installed simultaneously with the boiler, however this is not a matter of principle. To begin with it is necessary to establish by all rules the heating equipment.
Next, on the surface of the nearest wall to the boiler an outlet is marked. Its distance from the unit itself should be at least one and a half meters, and the diameter slightly exceeds the diameter of the pipe itself.
The special extension cable must be firmly connected to the boiler outlet. Fastening is carried out by means of special clamps.
The outlet opening for the coaxial type chimney, which is located in the wall, must necessarily be covered with a non-combustible heater.
The horizontal section of the chimney is then installed. It should be attached as hard as possible to the surface of the wall with the help of special brackets.
After this, the horizontal pipe section is connected to the vertical section. When installing a chimney of this type, all connections must be made as tightly and tightly as possible.
It is not necessary to put additional protection elements in the form of umbrellas or deflectors on the outside of the coaxial type chimney.
For more details on how to install such a chimney, see the video below.
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Tips and tricks
Coaxial pipe has a specific design, and its installation should be done with extreme care.
Do not allow the formation of defects and any damage, as an internal depressurization may occur, resulting in the boiler failing.
The length of both horizontal and vertical pipe sections of this type is selected based on the specifications, and it is recommended to take its minimum value.
The distance from the boiler is very important. The optimal value is from one and a half to two meters.
As practice shows, if all the requirements for installation are met, the premises will be maintained with the most optimal conditions for living.
In any case, before starting the installation work, it is recommended that you familiarize yourself with the relevant requirements and operating rules for heating equipment.
The installation of a coaxial chimney is made with a slope of the outlet pipe. If it is made in the direction of the street, the condensate formed on the walls will flow out by gravity to the outside.
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It should be noted that in this case the system will be fully functional only in the absence of negative temperatures on the street, since at the end of the pipe icicles can sometimes form from the end.
They will hinder the operation of the boiler and reduce the efficiency of the boiler. Specialists recommend making the necessary slope of the pipe directly towards the boiler.
In this case, it is necessary to install an additional device, which is called the condensate collector.
There is no need to conduct additional insulation of the coaxial type.
If you install the coaxial chimney correctly and in accordance with the generally accepted technology, there will be no problems with the operation of the heating equipment.
