Requirements and installation of coaxial chimney

To maintain the combustion process, as you know, oxygen coming along with the influx of fresh air is required. And for the uninterrupted operation of the heating system in the house, when burning any type of fuel, smoke and gaseous substances are formed, which are excreted out with the help of a chimney. The universal coaxial chimney is able to combine both of these functions, and the costs of insulating materials are reduced.

Features of the design of the coaxial chimney

In a closed room, a full -fledged combustion process cannot be maintained endlessly, since all the oxygen contained there gradually burns out. Because of this, the fuel does not burn completely, and the flame loses its strength, a carbon monoxide forms, and breathing in the room is becoming increasingly difficult. This is very dangerous for health and the life of the residents of the house, so the influx of fresh air is required.

If it is not clear how quickly oxygen is consumed, it is worth recalling school experiments. For example, if you put a burning candle in an open jar, and next to a jar, closed tightly, it will quickly go out. Or if 2 of the same large spiders are planted in 2 banks, and close the first with 2 layers of gauze, and roll the second as preservation. A day later, the second arthropod will be found dead due to the lack of oxygen, while the second will feel excellent, only a little hungry. These experiments clearly show how important the influx of fresh air into the rooms where oxygen is required is important.

To maintain the combustion process, oxygen is needed in the same way as for breathing living creatures. Firefighters at work are faced with the fact that in a closed room the fire is almost fading away until they open the doors or knock out the window. Further, with a tributary of fresh air, the process of quick fire occurs, comparable to the explosion. This is worth remembering for those who deal with fire.

During the operation of any heating equipment, it is important to ensure a regular influx of fresh air, but not portioned, and not so as to cool the heated room. For these purposes, experts recommend using the latest development of technologists coaxial chimney, photo:

A chimney device of this type is like ordinary, but there are differences at the installation stage and when buying. We need preliminary calculations where they are taken into account:

type of fuel;
boiler power;
the degree of tightness of the room;
an average air temperature on the outside;
wall insulation;
the indicator of the total capacity of heating equipment, especially in universal boilers.

The design of a thought -out chimney combines:

the output of hot smoke along the inner pipe;
fresh air for combustion in the boiler according to the external.

As already clear, the coaxial chimney is a double pipe, where a smaller diameter pipe is located inside a wider pipe. A sufficient clearance is formed between them so that the flow of air freely passes between them. For clarity, a coaxial chimney is offered.

The effectiveness of the work depends on the interval of pipes for the coaxial chimney, so that the equal clearance remains along the entire length and width, including the rotary parts and knees (bends). If you make a transverse section, it will be seen that there are two concentric circles inside, indicating the placement of 2 cylinders of pipes of different diameters. In this design:

the outer pipe draws air into the boiler from the outside;
the internal, narrower pipe is the main part of the chimney for the removal of smoke and gaseous substances released during fuel burning.

The proposed chimney scheme involves 2 combined pipes, that is, one in the other, but at the same time they are not connected by Medo. And clean air, absorbed from the street, is left a room without pumping, that is, automatically, due to the difference in temperature. There is no shortage of oxygen in the room itself, since it does not climb to maintain the combustion process.

The movement of cold air and heated smoke in this pipe occurs on the basis of the anti -flow principle. After all, if the heated air rises and goes outside, then it should come in its place colder, saturated with oxygen.

Attention: like any other chimney, it should have an important addition to the possibility of cleaning and a capacitance for condensate.

Work scheme and the main advantages of the coaxial chimney

Coaxial chimneys are used in the work:

gas boilers;
boilers on fuel oil and other liquid fuel;
solid fuel boilers;
universal boilers;
combined heating.

The thoughtful air supply and smoke eating system has many advantages regarding traditional chimneys. A coaxial chimney for a gas boiler is precisely the case when it is possible to guarantee the complete combustion of the fuel that is in the furnace. At the same time, it is completely isolated from the dwelling, as if heating equipment works somewhere else. This allows you to use it in a house without walls, where the zoning is very conditional, and the area is impressive. In addition, there are no conditions for the formation of carbon monoxide, that is, complete safety in this regard.

The coaxial chimney built into the gas boiler increases its performance, that is, the efficiency is much higher than that of analogues. This is due to the warming of fresh air passing between the walls of the chimney. That is, less heat goes to heating the incoming air, and the fuel burns entirely, thanks to a sufficient amount of reaching oxygen. However, for the effective operation of the heating system, it is important to comply with the requirements for the installation of coaxial chimneys specified in the instructions.

The influx of fresh air even in the coldest winter nights, passing through a double chimney, does not give a sharp decrease in temperature. In addition, the double capacity of the chimney retains the walls of the wooden log house from overheating, and there is no need for increased insulation for fire safety. Warming up the outer air along the path to the boiler in the chimney slightly reduces the temperature of the smoke, stimulating normal traction, that is, it does not allow heat to disappear too quickly.

There is no need to make a long smoke eating system, so the outlet hole of the coaxial chimney at the gas boiler can often be seen in the wall of the house, and not above the top point of the roof. In this case, the recommended length of this type of chimney ranges from 3m, that is, it can work on the same floor where the boiler is installed. It is also worth mentioning another advantage of optimal chimney costs, which is shorter than usual.

Coaxial chimneys are somewhat reminiscent of self-operating systems where all processes are thought out and automated. This equipment is able not only to increase the coefficient of useful operation of the boiler, but also to independently provide high fire and environmental safety. The uniqueness of chimneys of this type is also that it is established:

horizontally;
vertically.

Preparation and assembly of the chimney

Before installing a coaxial chimney, it is important to pay attention to certain parameters, making the purchase of such equipment. To do this, it is important to correlate the cross section of the output of the gas (or other) boiler and the coaxial chimney. These dimensions should be indicated in the instructions, so it is not so difficult to choose exactly what is perfect, especially since there are few options.

Attention: if the instructions indicate not all the parameters that are interested in, then the chimney should be selected based on their conditions, including the estimated pipe length.

There are 2 installation options:

the chimney through the wall is horizontally displayed;
the pipe is displayed in a prepared chimney or ventilation shaft.

Even before starting the assembly and installation of a coaxial chimney, it is important to check its completeness so that all spare parts can be put in place:

input and chimney;
coaxial knee;
connecting clamp;
adapter for the installation of coaxial chimney;
flange for a wall decorative pad;
2 decorative overlays that cover the hole in the wall.

It is important to know that:

a chimney of this type should be correctly attached to the boiler;
everything that can interfere with the full -fledged operation of the chimney should be removed or removed from the room (for example, flammable mixtures), and snow, falling leaves, etc.;
all the dimensions of the chimney and the output of the boiler must fully match, according to the instructions.

Tip: Since the design of the chimney allows you to remove the chimney outward not very high, in regions where a lot of snow can fall, the gas mask hole should rise at a sufficient height above the surface of the earth.

Location of the hole for the coaxial pipe

When installing a coaxial chimney, it is important to correctly determine and outline the outlet of the pipe through the hole in the wall, for example, higher than the boiler by about 1.5 m. In this case, the diameter of the hole ranges from 110 - 125 mm, respectively, its cross section. The coaxial chimney leaving the room is mounted with a slight tilt down to remove condensate.

Attention: the edges of the pipe are sharp, so the installation is best done in working mittens, so as not to get hurt! All work is done in the daytime and in good lighting.

Tip: Do not forget that the installation of the chimney ends with the installation and fixing the decorative overlay, which is in the kit, be careful so that there are no extra spare parts.

Before installing a coaxial chimney with your own hands, that is, without the help of specialists, it is worth drawing a preliminary pattern of laying the chimney based on their conditions. Sometimes it is required to purchase additional spare parts or components, for example, to increase the length of pipes and clamps for their junction.

Attention: Avoid fakes where there is no guarantee of quality and coincidence of components!

If the connection of the coaxial chimney independently raises any doubts, it is better not to take risks, but to entrust this to specialists. Without additional services, in order to save, you can only limit yourself to the design of the corresponding hole for the chimney in the wall. It is often difficult for a beginner to deal with the installation of an audit hatch and a condensation system.

Today, collective coaxial chimneys are also placed in apartment buildings, but they effectively work only with a thoughtful installation system, laid down in the project initially. Only specialists can do this.

With independent assembly and installation of this variety of chimneys, you should not worry about unexpected difficulties the coaxial chimney is collected according to the instructions, like an ordinary children's designer. All details, in the presence of a complete set and compliance with recommendations, are easily collected in a single product. That is, we collect a chimney with an air intake and insert a hole in the wall drilled in the wall, fasten the casing onto the screws and cover with decorative overlays. However, the installation process is not so much complicated here, it is much more important how accurately it is connected to heating equipment. If something is not clear, it is worth watching the coaxial chimney of the video that is at the end of the article.

Possible mistakes

Among the errors made during the installation of the coaxial chimney, such flaws usually occur:

the pipe in the wall of the building is confused;
lack of thermal insulation between the wooden wall and the chimney;
smoke leak due to insufficient tightness when connecting links.

Tip: decorative linings can be selected separately, by the color of the walls so that it looks most aesthetically.

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