The appearance of reverse draft in the chimney. Installation of forced traction. Signs of traction problems

One of the violations of the coordinated interaction of the heating system is the back draft in the chimney. Avoiding a difficult definition, we can say that this is the force with which the product of combustion is diverted out through a vertical pipeline.

During the operation of the stove, fireplace, solid fuel boiler, all the waste and fumes easily enter the atmosphere due to draft, but if combustion products, the strength of which cannot be controlled, begin to flow into the room, this will be reverse draft.

With a high temperature in the combustion chamber, with flue gases containing a significant amount of aggressive sulfur and nitrogen compounds, with high temperature and water under pressure, usually 1, 5 bar. All components of the boiler operating in such difficult conditions are subject to destruction.

Boiler performance may deteriorate over time

With the air needed for combustion, the central heating boiler is polluted, which then settles on the burner and heat exchanger. They degrade the quality of the combustion process and weaken the heat transfer. Both of them are unfavorable for both the user and the device itself. As a result of poor combustion, soot forms, which deposits on the heat exchanger. Fuel consumption increases - when burned incorrectly, it needs more to get the same amount of heat. A dirty heat exchanger significantly reduces the efficiency of the device, since a layer of dirt provides excellent insulation between the exhaust and the water in the heat exchanger.

Failure in the system can cause people in this room, headaches, poisoning, suffocation. And what to do? Let's take a closer look!

Chimney backflow mechanism

The causes of the reverse thrust effect

How to determine the cause

If there is no draft in the chimney, work to determine its absence should begin in the chimney. If the specialist was not invited, then they independently do this with the help of an anemometer - a device that allows you to measure the force of air movement.

You have to take care of security

Exhausts with a much higher temperature are discharged into the chimney - their heat is not fully used. In addition, there is natural wear and tear, as on any device. As in a car, the correct functioning of the brakes is checked, so the boiler must check the operation of safety devices. Every device, every node can break. To use the boiler safely, the technician must make sure that the boiler is working properly.

Chimney sensor, which automatically turns off the boiler when the chimney cable is blocked; protection against uncontrolled gas removal, protection against overheating. As soon as the driver usually changed the oil himself in his car, now most of it is performed by a mechanic in his authorized service. In the same way, modern heating appliances require the care of professionals with the right knowledge and tools.

To increase the likelihood of correct indicators, a certain condition is necessary - air flow with a speed of at least 1 m / s.

The check is canceled during the period when the temperature difference between the room and the street is minimal, for example, between two seasons (spring-summer).

Oil boiler under special control

Oil boilers, due to the type of fuel to be burned, must be reviewed at least once a year. Ideally, this is done with every fuel supply, that is, once or twice a year. Also check the oil boiler when replacing the fuel supplier. During the test, the burner should be adjusted and an exhaust gas analysis performed. An improperly installed oil burner can cause much greater “damage” than a gas burner. First of all, this will quickly lead to contamination of the heat exchanger.

Also, the device will show incorrect data in the absence of air flow. Anemometer does not apply to expensive and accurate instruments. For accurate measurements, more specialized electronic devices are used, which not everyone can afford because of their high cost. And what to do?

Attention! For the review we drive a sleek car. In the same way, we must continue to work with the boiler: we need to review it, even if we do not see anomalies in its operation. Ideally, before starting the heating season, we will call a service specialist who will check how our machine works and, possibly, replace worn items. Now we have a guarantee that we will not meet an unpleasant surprise, at least, of the expected moment.

How does a chimney work and how to do it? Only an internal combustion chimney installed in accordance with the instructions and instructions of the manufacturer ensures the safe and efficient use of flue gases or a smoke generator. And only this will be picked up by the chimney. How to make a chimney for exhaust gases in a detached house: conductor.

The action of traction is determined visually:

The presence of smoke in the room where there is a fireplace, stove or solid fuel boiler.
Checking the color of the flame. The distant noise and white color of the reeds of fire is too much traction; dark orange flames - insufficient; golden yellow - normal reverse draft in the chimney.
Deviation of the flame. Any object that burns out quickly (matches, cigarettes) can participate in the experiment. A match is lit and brought to a vertical pipeline, at the end of which a mirror is installed (in the hood), directed towards the room. Condensation is a sign of an improperly designed chimney.

Traction booster

The guarantee of safe operation of the exhaust system is designed and manufactured in accordance with the general principles for chimneys and the specific requirements for ducts, chimneys and chimneys. Chimney manufacturers in their design and installation work tell how to install their system so that the chimney works smoothly and safely.

Exhaust Pipe: Installation

Join us and stay tuned. The chimney exhausting the exhaust gas from the heater must be made in accordance with the following rules. The flue gas chimney must have an effective height of at least: 4 m - when unloading gases from a gas boiler or 5 m - for oil boilers. Therefore, it is acceptable to install boilers in one-story houses or on the top floor of two-story houses. The chimney cross-section cannot be reduced. Chimneys in the external walls of the house and external chimneys must be thermally insulated. The part of the chimney that runs inside the heated walls of the house does not need insulation. Chimney connections must be tight. It is not permissible to combine elements in ceilings. Exhaust chimneys must be laid above the roof to a height that will ensure proper chimney drain. Condensate tank with condensate drain installed at the base of the chimney; a viewing hole located under the chimney to the chimney; the bottom edge of the hole should be in the boiler room, at a height of 0.3 m above the floor; Inspection holes in the inclined parts of the chimney, if they are inclined from the vertical.

What is the chimney for the chimney

The chimney should be oriented vertically. . A mannequin is a section connecting a boiler to a chimney.

Dear visitors. Keep a link to this site in the social. networks. There will come a time when it will be cold in the house and we will help you :) Share! Timely cleaned chimney and properly designed design - a guarantee of a normal output of combustion products at any time of the year. Special equipment should not be neglected, since the effect of reverse traction is far from a safe phenomenon that can be harmful to health.

The baby should be guided as soon as possible, with the least number of bends and bends. With a home-made tiled stove, we will meet a different degree of difficulty. With its help, work, such as designing, planning an external form or making a list of parts, etc. It will be much easier. In addition, he will certainly provide assistance later when we contact him. However, before starting work, after deciding to create a furnace alone, we must check that we are not too drowned.

Tile installation is, of course, not a mysterious art. Each skilled amateur is capable, with the right guidance or technical support, to do it himself. Please note, however, that the operation of the furnace is inextricably linked with the transfer of exhaust gases to the environment and with a small amount of harmful substances. The neighbors, of course, will be grateful to us when our behavior is reasonable. The local chimney master must pick up the tiled stove before it can be used. Thus, there are many opportunities to transfer your creative power to the planned tiled stove.

Video: Recovering traction in a kiln

The secrets of treating joint pain from our regular reader.

Hello!

My name is Genadiy Alekseevich. I am a stove-maker with an experience of over 20 years. I am engaged in both repair and construction of Russian stoves and fireplaces. I always carry out work very efficiently and carefully, which negatively affects the condition of the joints. With age, the pain began to get stronger, up to a state where I could no longer work. Having tried a lot of both medical and folk methods of treatment, I realized how serious my disease is, since there was no positive effect. Until I came across one remedy, which I want to tell you about.

Anyone who has some kind of craft experience, and he himself wants to make the shape of his tile furnace, he must find a factory in Zdunsk that will help him in the design, supply of materials, delivery of goods and construction. At this time, you can solve the furnace on the technical side and do more difficult construction work. Do not underestimate this work, we will certainly be busy for several days. Even if we worked under the supervision of a pilot for other jobs, we should plan a week off for this method of creating a tiled stove.

This is a unique blend of the rarest and most powerful natural healing substances. This tool has proved its effectiveness not only to patients, but also to science, which recognized it as an effective drug. Joint and back pains go away in 10-15 days, studies have shown. The main thing is to strictly follow the instructions in the methodology. You can order the product in its original packaging, with a guarantee of quality, at

An experienced amateur can combine the furnace chamber with an additional heating box and smoke channels with the appliance for one day. The connection to the chimney is the place where the chimney master checks. When we decide to build a structure with good documentation, the rest of the furnace is pure pleasure. If you are an experienced craftsman with a lot of craft experience and helping to build a tiled stove, you can certainly afford it. In each case, the chimney master must check the suitability of the chimney.

The operation of heating devices, as well as the safety of residents of houses with stove heating, depend on the draft in the chimney. Troubleshooting can help you feel comfortable and confident in your home. You can increase or adjust the pressure indicator by yourself.

Useful information about chimney draft

All residents of suburban or private urban houses are familiar with such a concept as draft in a chimney. Do they know the essence of this term?

We must also verify that the space provided for the furnace is appropriate for its weight. For a convection tiled stove, read the required outlet pressure in Pa. Please ask a specialist to calculate the foundation or tiled stove for exact match with the chimney. In any case, it is good to use good working materials in sufficient quantities.

The chimney pipe is a physical phenomenon that we determine by the upward movement of gases in the chimney. This movement is due to the difference in the specific gravity of the hot exhaust gases in the chimney and the specific gravity of the outdoor air. Lighter flue gases rise up, resulting in lower pressure at the bottom of the chimney.

If you move a little away from dry scientific terminology, then thrust can be defined as a natural phenomenon in which air moves from one area to another, namely from the air zone with increased pressure to the zone with reduced pressure. All this happens with the help of a ventilation device - a special channel in the chimney.

In turn, uncontrolled interruptions in the operation of the heating device can be very unpleasant, especially when using a fireplace as the main source of space heating. On the other hand, too much chimney will hit us in the first place in our pocket, because it will cause a quick burn burn. And this means that more heat comes out through the chimney. In this case, the fireplace or the goat simply does not reach the declared power.

Fireplace or goat - which chimney to choose

A fireplace or goat is also a heating device, and all such appliances need a suitable chimney. Remember that always the minimum required chimney exhaust required for the proper operation of the device, the height of the chimney and its cross section should indicate the manufacturer of the fireplace. And these recommendations should be strictly followed.

Using this process of aerodynamics, humanity began to use fireplaces, stoves, boilers, heating its home with the help of various types of fuel - coal, firewood, peat, etc.

With good traction, the stove quickly flares up and the room fills with pleasant heat

From a correctly designed and constructed chimney and, accordingly, from a good draft, it depends:

If these parameters are not indicated in the product specifications, they must be requested from the manufacturer or canceled after the purchase of such a product. Ensuring proper chimney draft for the device is too important to ensure the safety and comfort of using the fireplace, so that we can contact the manufacturers and try to calculate the parameters ourselves.

Causes of draft in the chimney

Here are a few reasons for an abnormal chimney design and how to improve it. Contamination leading to narrowing of the cross section of the chimney - manual or mechanical cleaning; Chimney leak - installation of a stainless steel cartridge or sealing with special masses; “Cold” stack - installation of thermal insulation, the outlet of the chimney below the ridge or darkened by tall trees - Assembling a steel contribution of sufficient length to expand into the stack, an excessively high chimney - applies to the design of the smoke regulator, too large a cross section is the installation of a steel cartridge, which has a smaller cross section, too many knees - eliminate fittings or use others with a smaller angle. In the last two cases, we can also use a mechanical exhaust fan or a special chimney cover.

quality of space heating;
reduction in fuel costs;
safety of being in buildings with own heating.

What affects the value

There are three groups of factors that must be taken into account when constructing and checking the chimney.

House moments

A number of factors, indoors, can significantly affect the presence / absence of traction and its strength:

The material from which the building was erected.
The average temperature in the room.
The maximum amount of airspace in the home.
The number of people permanently inside the housing.
The presence of internal sources that additionally consume oxygen (heaters, heaters, stoves, etc.).
The regularity of fresh air (ventilation, ventilation).

External factors

There are other factors that determine the chimney draft, and they are located outside the heated room. We are talking about the temperature of the environment, atmospheric pressure, humidity, wind direction. A phenomenon such as a change in temperature during the day can also affect draft - due to the movement of cold and warm layers of air.

Difficulties with traction arise from various reasons, some may simply not be noticed. For example, problems with air outlet through the chimney can occur if the pipe is much lower than the ridge of the building or tall nearby trees.

Features of the design of the chimney

The draft may be different depending on the design characteristics of the chimney:

height;
the presence of insulation;
tightness;
location (internal / external);
length;
the presence / absence of irregularities or roughness, etc.

It is necessary and possible to control the draft in the room using the “levers” of the first and third factors (house and design). Natural changes, of course, are independent of man.

Keeping control of the draft in the chimney is a prerequisite for safe and comfortable living in your own premises. If the draft is very weak, then it is almost impossible to ignite the stove and heat the home.

With reverse thrust, the gases generated by combustion are “thrown” into the living room, and not into the air through the pipe. It is very dangerous for human health and life!

It is impossible not to notice such atypical smoke behavior.

With a very strong draft, all the heat is rapidly drawn out through the channels of the chimney to the outside, not having time to warm the heated room to the desired temperature.

Why does reverse thrust appear?

Weak thrust can be the basis for the formation of reverse thrust. How can one recognize that not everything is safe with traction?

Moments that can be ascertained with the naked eye “speak” about this: a lot of smoke in the furnace, soot on the door, the house traffic coming in smoke. In other words, smoke, cinder from combustible fuel does not go into the chimney through the chimney, but tends to get into the living room with the door open and through the cracks.

Reasons for reverse thrust:

Chimney design flaws. Low pipe - increased risk of reverse thrust. The higher the pipe, the better the process of extracting exhaust gases and smoke. The optimum pipe height is about five meters.
Correspondence of the diameter of the pipe to the parameters of the furnace device. For a powerful furnace, a chimney with a pipe of a rather large section is required. But here a measure is very important, because using a pipe too wide will make the furnace process unprofitable (all the warm air will literally fly into the pipe). It is unacceptable to use several pipes with different sections in the chimney!
The use of non-smooth pipes. Roughnesses, chips, roughness, etc. - an obstacle to good traction. Over time, the opening of the chimney can narrow due to a deposit of soot and other combustion elements and impede the process of kindling the furnace, its normal functioning.
Violation / lack of ventilation. Drafts, open windows in rooms located above the furnace, do not help the process of burning fuel, but distort it, making it useless and unsafe.

Chimney channels made of metal are in many ways inferior to brick pipes. Fast heating and the same rapid cooling do not benefit the heating system as a whole and the chimney in particular.

Brick pipes are much more efficient in terms of smoke extraction

Reverse thrust can also appear for objective reasons that are not dependent on the person. Strong gusts of wind, rainy, cloudy weather with high humidity - adverse moments in terms of the formation of problems with traction.

There is a term like temporary backdraft. What is it? In this case, it is worth talking about temporary traction violations, for several days. After a certain period, traction returns to normal.

Temporary backdraft can happen due to a cold room, unheated for a long time. Very cold air accumulated in the chimney pipe prevents the rapid combustion of fuel. Therefore, smoke can be “pushed” from the chimney into a dwelling, bathhouse or other room with a stove or fireplace.

It is very easy to eliminate cold air in the chimney - warm the pipes by burning ordinary newspapers, wallpaper, paper in the oven. The main thing is that these materials are well dried.

If traction problems can be fixed constantly or at a certain frequency, then measures must be taken to eliminate bad traction.

Force check

Before you throw your strength into fighting bad traction, make sure that traction really leaves much to be desired.

Traction can be checked using special tools or independently. Simple ways to fix traction:

Light a paper sheet, let it burn a little. Put it up to the stove or fireplace, extinguish the paper and observe the direction of the smoke. If it goes to the pipe - good traction, deviates in the opposite direction - reverse traction, if it maintains "straightness" - there is no traction. Such manipulations can be done with thin tissue or toilet paper without setting it on fire.
If there are smokers in the house, then follow the direction from the smoke of cigarettes or from the flame of a match, a lighter near a fireplace or stove. Draw conclusions similarly to the first paragraph.
The flame of an ordinary candle can also help in determining the draft in the home.
A pocket mirror, brought to the furnace and covered with condensate, may indicate problems with the removal of smoke from the furnace.
The presence of too much traction, taking away useful heat from the room, is evidenced by an audible hum in the furnace - a loud buzz.
The color of the fire in the firebox can be an indicator of different traction. Golden hue - good traction, white flame - excessive traction, red color and black smoke - poor traction, high probability of reverse traction.

A regular lighter can help check traction

An anemometer is a device familiar to many people of the Soviet period. With this device it was possible to measure the draft of the chimney. Normal readings were considered within 10–20 Pa. The disadvantages of the device are its low accuracy with a wind force of less than one meter per second.

Such a simple device will help to protect your life in a house with stove heating.

Modern industry offers a sufficient number of devices for measuring draft, there are devices that fix the draft at the inlet and outlet of the chimney.

Troubleshooting Methods

If you have found problems with traction, then, of course, they need to be fixed as soon as possible.

The choice of means to deal with bad or reverse draft depends on the reasons that led to the abnormal operation of the chimney.

Pipe cleaning

One common way to improve traction is to clean the pipe. Fuel, burning in the furnace, releases various substances that settle on the inner surface of the chimney. Soot adheres well to pipes if they are uneven or bent.

When working, do not forget about safety measures

How to clean the chimney so that a good draft appears?

First of all, acting purely mechanically. The chimney channels can be made wider by getting rid of plaque in the following ways:

Having prepared about one bucket of potatoes, peel and chop it. Potato peelings are also suitable. Throw a little into the firebox and wait. When burned, potatoes will secrete starch, which will become a means that can soften carbon deposits. Soft pieces of soot will fall away by themselves, and firmly adhering will have to be removed mechanically.
Firewood from aspen. Burn the stove with two or three logs. They will very much heat the chimney pipes and help get rid of carbon deposits. But this method requires special care, because the probability of a fire will be very high (soot can catch fire).
Rock salt. This method is more suitable for prevention. The salt added at the time of the furnace improves the condition of the chimneys.
A pipe brush. A heavy load is attached to a brush suspended on a steel rope and lowered into chimney holes. By lowering and raising this structure, it is possible to force the soot formations to fly off the pipe walls and fall into the furnace. These fragments are then extracted from the furnace.

The second group of anti-carbon black measures is based on the use of chemicals. The most popular chemicals for cleaning the chimney - "Log-chimney sweep", "Kominichek." Chemicals are added to the coals formed in the furnace or fireplace combustion process according to the instructions and continue to be heated. After burning all the fuel, it is advisable to leave the coals, since they continue to “work” in terms of cleaning the chimney (at least, manufacturers advise so).

Do not believe the spiteful critics who talk about the obligatory burning of soot when using the chemical method. This method does not pose any danger, because the beneficial effect is due to chemical reactions, and not due to the superhigh combustion temperatures of the reagent.

Special mention should be made of the observance of safety measures during all work related to the chimney. Do not fix chimney problems in windy weather! Try to use safety devices during work at heights!

Troubleshooting structural issues

If you identify certain design features of the chimney that adversely affect traction, adjustments should be made to eliminate them. These actions include:

dismantling several scattered pipes and installing a single chimney channel;
roof pipe superstructure to the required height;
insulation of chimney elements, etc.

Arrangement of ventilation

In some cases, cravings can improve if drafts are not allowed in the house or bathhouse. To help with problems with traction, you can install ventilation devices on the windows.

In the absence of the proper effect after all the above methods, modern devices should be adopted to improve draft in the chimney.

Instrument Installation

To improve the operation of the chimney, it is best to use special devices that allow you to adjust and control the draft. Such devices can be bought at the store or made with your own hands.

Special devices for regulation

Modern instrument-makers took care of the release of special devices that regulate draft in the chimney:

Regulators. They are installed on the outlet pipe of the chimney to normalize the draft in the heating system, and also as a means of influencing the efficiency of heating.
Baffles. Such devices are fixed on the chimney from the outside. Improving the draft speed is due to the fact that the diameter of this device is much larger than the chimney pipe, and, therefore, a low pressure region appears in it when it flows around it with air flows.
Chimney weather vane. It is a special design that performs several functions at once: improves traction, protects the pipe from raindrops and snow vortices. The action of the device is similar to the operation of the deflector, the traction speed is normalized by reducing the external air resistance.
Smoke fan. It is very popular among owners of houses with a heating system. An artificial air vortex is created inside the chimney due to the operation of the ventilation system, which requires electricity to connect. Compliance with all necessary safety measures is a prerequisite for the installation and operation of such a device to improve chimney draft.

All devices installed on the chimney pipe to improve traction require mandatory control, especially in the winter. This is due to the fact that additional devices attached to the chimney outside can become clogged, icy (in winter) and thereby interfere with the normal operation of the chimney. A blockage obtained “with the participation” of devices can cause back draft and carbon monoxide to enter residential premises.

Do not forget to regularly inspect along with the chimney and appliances that help increase traction.

Photo Gallery: Traction Control Devices

The most common device among stove heating users Such a device is especially relevant for improving the operation of stoves and fireplaces. Useful and beautiful device By installing such a device, you can increase the performance of the entire heating system

Self-troubleshooting

Let's try to make the furnace process safe and effective with our own hands. The most common way to deal with soot buildup in pipes is a brush with a sinker.

We clean the pipe with a brush

To start, we will prepare everything you need:

Rigid bristle brush. The diameter of this device is selected taking into account the cross section of the pipe (from fifty to three hundred millimeters).
Thin metal cable (can be replaced with a very durable rope or rope).
Cargo for hanging to a brush.

Here is a device for cleaning the chimney pipe

Do not start work if there is strong wind or excessive humidity in the street. Try to think through and use reliable insurance to protect yourself from unforeseen cases.

Ruff is weighted with a sinker, attaching it to the bottom of the device. The brush itself is hung on a cable. All fastenings should be especially reliable, otherwise the design will fall apart and you will have to perform additional actions - to “fish out” them from the pipe.

First, all inspection holes of the chimney are cleaned, and then they start cleaning the pipe itself. By making several movements up and down, you can get rid of soot, which from the pipe will fall into the furnace. It is best if there is someone else near the stove to signal the effectiveness and the time of the shutdown.

Pipe cleaning should be completed when the soot ceases to crumble.

You can clean the pipe with the help of improvised means, about which many videos have been shot.

Video: we clean the pipe with improvised means

Selection of devices for regulation

Consider some of the characteristic features and methods of using devices for controlling and adjusting traction.

Such structures are installed on the chimney (at its very top) to create obstacles to the flow of air. The intensity of the wind decreases noticeably when meeting with such devices placed on the pipe. Smoke exits through the channel “into the wild” due to the ingress of weak air currents into the pipe. These streams “hook” the exhaust gases and “push” them out.

Deflectors eliminate the possibility of clogging of the pipe, and also made with taste, significantly improve the appearance of the entire building.

There are several types of deflectors:

TsAGI;
wolpert's round;
Grigorovich;
in the shape of a plate;
in the form of the letter H;
rotating;
vane.

Almost all of these devices are made of stainless steel, in rare situations - of copper. Using brackets, clamps, bolts, sealing tape, the deflector is attached to the chimney pipe. Some devices are also equipped with additional functions: to extinguish sparks (to eliminate possible fire of the roof), to control the temperature of the exhaust air (in this case, the sensor is triggered if hot air does not come out and there is a chance of back draft).

The disadvantages of using deflectors are their minimal efficiency in calm weather.

Photo gallery: types of deflectors

The most common traction device Such a device can be purchased at specialized stores. The choice of device depends on the design features of the pipes and your preferences

The turbines installed in the head of the chimney use the power of the wind. Air flows drive the rotational nozzle (it always moves in the same direction), and thereby rarefaction of air near the chimney. It completely eliminates the ingress of any foreign objects and precipitation into the chimney with the rotational pipe.

Rotary pipes have a big minus, similar to the deflector. Their use on a calm day is ineffective.

If you do not have great abilities, to buy such devices is not a problem

Traction controllers

Such devices are a real find for residents of country houses, lovers of baths and fireplace gatherings. These devices are attached to the chimney of the boiler. They are equipped with a metal plate with a load that balances it on one side. When the draft is good, the metal plate does not interfere with the free access of air to the chimney. With weak or reverse thrust, the metal plate serves as a kind of stupor.

Range limits for traction are set by the consumer himself, the usual parameters are 10–35 Pa.

The device works absolutely autonomously, it does not require the supply of electric current.

How to increase traction with your own hands: homemade appliances

Before you start the construction of the deflector yourself, weigh your strength, look at the available materials and only then get down to business.

Drawings and schemes

To create a deflector with your own hands, you need to use diagrams and drawings. You can use the ready-made ones, presented in large numbers on the Internet, or you can do it yourself, based on the data from the ready-made schemes and drawings.

Photo gallery: ready-made diagrams of devices for traction

On the Internet you can find a good help for the construction of the device Carefully read the instrument diagrams and choose the one suitable for you The diagram shows the device of this device to improve traction The diagram shows the components of this device

If you decide to test yourself and save money at the same time, arm yourself with measuring instruments to determine the internal diameter of the chimney. Depending on this value, it is possible, focusing on the table, to determine the necessary parameters for the height of the deflector and the width of the diffuser.

With an internal diameter of 120 mm, these parameters are respectively 144/240, for a diameter of 140 mm - 168/280; if the internal section is 200, then 240/400; for a cross section of 400 mm, a deflector height of -480 mm is required, and a diffuser width of 800 mm.

It is possible to calculate the necessary parameters (for a specific pipe diameter) by ourselves, using simple calculations. To determine the width of the diffuser, the inner diameter of the pipe must be multiplied by 1.2; the width of the umbrella for protection is -1.7 x d; we learn the total height of the structure if we multiply the value of the internal section by 1.7.

Having received all sizes, we build drawings for more precise cutting. We draw the diagrams on a piece of paper or on the back of the remaining pieces of wallpaper.

It is best to build a full-size drawing. So that when cutting, simply attach the cut out paper parts to the steel sheet and not to recalculate the data taking into account the scale of the drawing.

We stock up on materials and tools

Everything must be prepared in advance so as not to be distracted during work.

We need to make a deflector:

galvanized sheet with a thickness of at least half a millimeter; stainless steel can also be used;
scissors for metal;
drill with different drills;
riveting device;
hammer;
pliers;
clamps, nuts, bolts;
marker (for transferring a drawing to a metal sheet).

Preliminary stage

The preparatory work consists not only in tracing the details of the device, but also in cutting them out and fitting them. All paper elements are fastened with paper clips or a stapler and applied to each other. If all goes well, then you can carefully remove the clips and straighten the templates.

Do not neglect the process of creating a deflector, try to think about your safety. In order not to injure your hands and to protect your eyes, use pre-prepared gloves and special glasses.

Getting to work

So, everything is in place, you can proceed!

A step-by-step description of the sequence of actions will help you:

We translate the parts cut out of paper onto a galvanized sheet. We should be able to develop the following elements: cap, diffuser, outer cylinder and strut.
Using scissors for metal, carefully cut out all the components of the deflector. In places of cuts, the metal is bent with pliers to a half-millimeter thickness and is "passed" with a hammer.
The blanks of the diffuser, cap and cylinder are folded and drilled holes for fasteners (if bolts are used). Connections are made using rivets or bolts, in exceptional cases, welding can be used (semiautomatic device).
For fastening the hood we prepare 3-4 strips of metal. The sizes of the strips are 6 by 20 cm. The strips, bent from the edges and touched with a hammer, must be bent in the shape of the letter P. On the cap, five centimeters from the edge, drill 3-4 holes and fasten the metal strips with bolts.
The other ends of the galvanized strips must be attached to the diffuser, thereby “looping” the cap and diffuser.
The resulting design is inserted into the shell.

You can watch the construction of the TsAGI deflector with your own hands in the video.

Video: TsAGI do-it-yourself deflector

Deflector mounting

The first way is to climb onto the roof and, observing safety precautions, attach the made device to the chimney pipe.

You can make your work a little easier - attach the deflector to the additional pipe, which then lift it onto the roof and insert it into the main pipe.

We put the home-made device in its place in a second, safer and more convenient way. We need a piece of pipe with a slightly larger diameter than the chimney. Retreating from the edge of the cut pipe about fifteen centimeters, mark and make holes, the same manipulations are performed on a wide part of the diffuser.

Large buildings also need to install traction control devices.

The process of self-regulation of traction is necessary in order to comfortably and safely live and relax in a house with stove heating. To do this, you can use different methods that are suitable for your chimney design: cleaning the pipe with a brush, “chemical cleaning furnace”, installation of special devices. Traction control devices can be bought or made independently.