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Why does the ventilation work in the opposite direction? Thrust in the tube of a bath furnace

The proper operation of any kiln requires good traction. If it is, the smoke moves along the chimney and comes out into the atmosphere. However, the movement of smoke is not always the way it should be. Often there are cases when it does not move outward, but, on the contrary, begins to stand out from the oven and fill the room. This phenomenon is known as the reverse thrust.

Of course, it does not do any good. After all smoke is harmful to the body and the constant presence of its smell is very annoying to the owners of housing. Fortunately their noses with this problem can be fought and, most importantly, to warn it. To avoid this phenomenon, you need to know why it occurs. There are many reasons for its appearance.

Factors that create a reverse movement

Most of them are related to wrong chimney. So, the return draft in the chimney will always appear, if pipe height for smoke too low. In this situation, the pressure difference is very small and therefore the air either moves very slowly or does not move at all.

The second reason is too a small cross-sectional area of the chimney. In simpler terms, the return thrust is caused by a too narrow tube. She just does not manage to take away the smoke that is formed in the firebox when burning wood. Excess smoke is forced to move inside the room.

Also, problems arise when the chimney consists of different parts in diameter. They, together with the soot accumulated on their compounds, create an additional barrier to the movement of smoke.

No less important role in the appearance of reverse traction has and uneven pipe surface. Unevenness contributes to the accumulation of soot, which makes the passage smaller. At first, after creating the stove with the tube uneven in the middle, the burning air goes out without delay. However, the soot accumulates every day, the diameter of the pipe becomes smaller, and it is increasingly difficult to ignite the fire.

Do the angles and shape of the smoke hole

The reason why the smoke moves inside the house may be in the wrong angles of tilting and turning the chimney. This lack of design also contributes to the accumulation of soot. To avoid it, you need to do angles of inclination 45 degrees, a angles of rotation - 90 degrees.

The list of reasons for the incorrect design does not end there. It also includes shape of the smoke hole. If it is square or rectangular, then vortices begin to form in the corners. They also become a kind of barrier to the movement of carbon monoxide and, in the presence of additional factors, can cause back draft. The ideal form for good traction is the round one.

The material from which the chimney is made also affects the likelihood of reverse smoke movement. If the pipe is metal, then it quickly heats up and cools. Rapid cooling allows cold air to fall down. And such air is heavier than hot and therefore carbon monoxide changes direction. Brick The same designs accumulate heat and keep it long enough. Therefore, the latter is recommended to do to prevent the reverse movement of smoke.

Disturbance of ventilation

There are cases when the design is created well, and the return thrust in the chimney still occurs. Call it can disturbed ventilation.

Very strong drafts can draw smoke. Therefore, it is necessary to take them into account before the cultivation of fire and do so that they are not.

If fresh air does not enter the room with the furnace, then the oxygen that was, is used and decreases in quantity. This leads to the formation of critical air rarefaction. In this case, fresh oxygen will come through the chimney. His coming will be periodic. At this time, the reverse thrust will appear.

External factors

Directing the movement of smoke to others can high humidity on the street, strong wind or air temperature. In the latter case, a warmer temperature is observed outside than in the middle of the house. All these factors create a great difference in pressure. Smoke is easier to move inside the room than to climb up a special tap.

Cold air always cools the chimney. If the discharge of contaminated burning air is located in the middle of the house and comes out near the peak, then this cooling is less. More cooled chimney, located at the wall of the house. Therefore, it increases the chances of the appearance of reverse traction.

In a special way, the wind can influence the thrust. This influence is possible when the wind is very strong or the chimney is below the visor. Also, it appears in the case when there is near the branch pipe tall trees and houses. They contribute to the emergence of twirls of air, which cause rollover.

Reverse draft can also cause chimney contamination with foreign objects. For example, birds can nest.

Means of struggle

In the case of the emergence of reverse traction, it is necessary to stop the furnace. Further it is necessary to find out why such a situation arose and to eliminate the cause, and also to increase traction. The last procedure will avoid the reverse movement of carbon monoxide. It provides for:

Cleaning the chimney from soot.
Providing fresh airflow (opening windows for 5-10 minutes before igniting the fire).
Warming of the chimney.

An excellent means of struggle is deflector. It is a mechanical fan that sucks in carbon monoxide. Also use a slide (special damper). It allows you to adjust the traction. Apply two slats. One put in the chimney channel, the second placed in the door of the oven or in the oven itself.

Sometimes the owner can save several burnt sheets of paper. Their combustion is advisable when the furnace is not heated for a long time, and all its openings are filled with cold air. The heat released from the burnt leaves pushes out the cold air.

If there is an incorrect chimney design, you need to change it completely.

How pleasant it is to get warm on a cold winter evening by a warm stove or fireplace! Cracking logs, coming from the furnace, has a very relaxing effect on the human body. The heart becomes warm and easy.

What is a smoke draft?

A man who recently became the owner of his own house with furnace heating, interests, if there was a return draft in the chimney, what to do. This phenomenon is noticed immediately and appears in the chimney area. It is formed as a result of the fact that the heating and the chimney channel are not working properly. As it turns out, there are a lot of very different factors that lead to this phenomenon. In order to choose a way to deal with this problem, it is necessary to thoroughly understand this issue.

Reverse thrust is a stream of flue gases, striving not upward, as any jet of warm air is supposed to do, but into the room where the stove stands. The main reason for this phenomenon can rightfully be considered as an indicator of the difference between the pressure created in the furnace and the street. As a result, the flow is directed along the path of least resistance.

The formation of reverse thrust occurs when the flue gases, which are actually formed when the fuel burns, do not go through the pipe to the street, but move downwards, that is, into the house. Also, in parallel with the concept of reverse traction, there is such a phenomenon as its overturning. In this case, smoke also flows into the room. So, let's try to answer the question about what is the return thrust in the chimney, what to do, how to restore the system's working capacity.

Thrust Standards

A man can not but grieve that there is a reverse pull. What can be done - can be solved only by carefully understanding the origins of the problem. It is very important that the chimney channel work in full-fledged mode. In the case of any failure, the fuel does not burn completely. This, in turn, leads to the accumulation of smoke in the furnace. It reaches a certain volume and after that begins to stand out in the free space, which is the room. This does not fit in any fire regulations and adversely affects the state of human health.

There is nothing good in the fact that the draft is excessive, as this leads to excessive heat losses. In view of this, the furnace becomes very hot, which can cause its deformation and even fire. Therefore, you need to carefully monitor the condition of the whole heating system. The average pressure in the chimney area should be 10-20 Pa.

Backward draft in the chimney: what to do?

Reasons for the appearance:

Low chimney. This leads to a small difference in pressure. As a consequence, a very bad smoke draft or its complete absence.
Incorrect installation design. This is an incorrect relationship between such parts of the heating system as the combustion chamber, the height, and the diameter of the chimney.
Wind power, formed as a result of the fact that there is a taller structure nearby.
Poor ventilation, as well as insufficient supply air.
Atmospheric indicators.
If above the level of the external chimney there is a ridge of the roof, then in case of strong wind, the thrust can be overturned.
Clogging the pipe with a wide variety of rubbish.

Only when it is known what caused the return thrust in the chimney, what to do and how to improve the operation of the stove - it will be immediately clear.

Reverse thrust detection

In order to answer the questions about how strong the return thrust is in the chimney, what to do, the methods of struggle which are appropriate, it is necessary to initially determine the fact of its presence. Determine that there is a return thrust in the area of the chimney channel, you can use a special device - an anemometer. Such diagnostics is the most accessible. It should be noted that the determination of the presence of reverse thrust is possible only if at the time of verification there is a sufficient flow of wind, the index of which exceeds the mark of 1 m / s. If its value is lower, then the definition is impossible. It is very bad when, according to the testimony, it is established that there is a return draft in the chimney. What to do to eliminate?

Since it is not always possible to use special devices, in this case the proven folk methods will come to the rescue. First of all, the definition is possible with the help of simple visual perception. If it is noticed that there is no smoke in the room, this is a direct proof that there is direct traction. Special attention should be paid to the color of the burning of the fire. If the flame is more predominantly white, you can talk about high traction. In addition to color, this is indicated by the sound that comes from the furnace. It is more like a hum. The orange color of the flame indicates that there is no thrust. For the correct level of thrust, the golden color of the fire is characteristic.

When determining the thrust, the most ordinary matches or a piece of paper will come to the rescue. If the flame deflection is observed at the time of burning a match or a sheet of paper, then this indicates that there is a draft.

In the case where it is necessary to determine the absence smoke draft, you just need to look into the middle of the furnace. If there is a lot of smoke in the cavity, it means that there is no traction. It is necessary to treat this phenomenon with a high degree of responsibility, since this can lead to the fact that gases start to leave the furnace and accumulate in the room. If it is found that there is a return draft in the chimney, what to do should be solved as quickly as possible.

Installing the deflector

If we were able to understand the main reasons, and it turned out that as a result of the deviations of the air flow there is a reverse pull, what to do about it, the deflector decides. This is a special device, the work of which is based on the aerodynamic effect. It as soon as possible reduces the level of pressure in the event that in the path of airflows there are some or other obstacles. High performance of this device is observed in strong winds.

Adjusting the stabilizer

Installation of the stabilizer is carried out in the cavity of the smoke channel. At the bottom of the body is a special hole, through which there is a free circulation of air. In view of the fact that the stabilizer has a special form of construction, it has the ability to fully control the air pressure in the pipe. The operation of this device is carried out in conjunction with a special sensor that monitors the temperature of the exhaust combustion products. If suddenly the traction deteriorates, and as a result there is a congestion of smoke in the pipe, which leads to the heating of its walls, the sensor immediately fires.

Use of a rotary turbine

The rotary turbine will help if there is a return draft in the chimney. What to do and how to fix it, it will help to solve. The work is carried out due to the use of wind energy generated in the turbine. It is installed directly on the top of the chimney. Due to the fact that the turbine constantly rotates in a certain direction, it dilates the air in the area of the smoke channel. But this is not the only function that this device does. It prevents particles of debris from getting inside. Despite such significant positive features, the rotary tube has its own drawback. The thing is that it continues to work continuously even during the end of the heating season, that is, in the summer. This, in turn, leads to the fact that in the area of the chimney there is a strong increase in the level of thrust.

What is the danger of improper operation of the heating system

A good and safe operating mode of the heating system directly depends on the level of the smoke draft. In the case of the appearance of the very first signs of the problem, it is necessary to carry out an inspection, and in case of detection of any malfunctions, it is necessary to eliminate them as soon as possible. In some cases, a bad draft leads to a carbon monoxide entering the room. As you know, it is very dangerous for human health and in some cases can even lead to death. Most of the existing faults can be eliminated with your own hands. If there is no experience or skills, it is better to seek the help of specialists in this field who will perform all the necessary work in the shortest possible time.

Reverse traction of temporary nature

In some cases, the reverse thrust is not a permanent, but rather a temporary phenomenon. We answered the question: "If there was a return draft in the chimney, what should I do?" Restoring the normal process will take very little time. Often, the main reason is the cooling of the furnace and chimney. The fact is that during this period of time, cold air accumulates in the cavity of the furnace, which is heavier than heated, it also prevents normal draft. Typically, smoke in a short time can completely fill the room. In such cases, the stabilizer of the thrust installed in the chimney cavity will help to get out of the situation.

Backward draft

The reverse draft in the chimney is a process when the flow of gases from burning firewood goes not to the chimney outside, but in the opposite direction to the room. If we speak in scientific terms, then when fuel burns, an aerodynamic flow of flue gases arises in the exhaust structure.

The reasons for this phenomenon can be high buildings nearby, trees, as well as the location of the pipe below the roof ridge. There is a large number of such factors, so it is necessary to understand the problem that has arisen and to resolve the issue of strengthening traction with one's own hands.

Reverse link detection

The reasons for the emergence of reverse traction can be several:

Incorrect chimney design.
Disturbance of ventilation.
External factors.

Important! To notice the first signs of the return draft in the chimney is quite simple: the wood burns in an oven with a lot of smoke, the glass is quickly smoked on the door, and if it is opened, the smoke immediately spreads through the room.

If you do not understand how to increase the chimney draft, it can become not just bad, but also reverse. Check the traction in fairly simple ways:

Bring to the open door of the furnace compartment a sheet of toilet paper, a burning candle or a lit cigarette and see which side the light paper, the candle flame or the smoke of the cigarette is deflecting, and with what force.
If the flame is white in the furnace and the buzz is heard in the chimney, then it is required to reduce the thrust, since burning with such force firewood or other fuel will bring little benefit. Simply put, you heat the street.
If the flame is yellow with a golden hue, the pull is good.
Using a special device - an anemometer. On it you can get objective indicators if the wind speed is more than 1 meter per second.

To determine why the backward thrust has arisen, it is necessary to know the factors that cause it. In addition, it would be good to be able to solve the problem with your own hands.

Chimney design

The very design of the chimney is of great importance for thrust. At too high a pipe draft always strong, and at low - small. The best option is a product with a length of 5 to 6 meters. In this situation, there is almost no problem with traction, and if a problem arises, it is clearly not because of the height of the structure.

In addition, it is necessary to pay attention to the area of the chimney - it must correspond to the volume of the furnace. If this area is small and the volume of combustible fuel is large, the resulting combustion products do not have time to reach the narrow smoke hole of the pipe, so there is not enough draft. Disproportionately large chimney in relation to the size of the stove or fireplace leads to the fact that all the heat simply flies into the pipe. It is strictly forbidden that there are sections with different diameters on the chimney, since soot will accumulate on them, and there will always be problems with thrust.

A significant obstacle to the escape of smoke will serve as an uneven surface of the inner walls of the chimney. After all, any unevenness leading to deposits, as well as foreign objects that get into the chimney, reduce the diameter of the pipe, as a result of which it becomes increasingly difficult to melt the furnace.

The shape of the smoke hole is another important point. The most favorable option is a round chimney, but a square or rectangular can create problems. After all, in the corners of a rectangular design, additional vortex flows of air arise. Very often, the reduction in thrust is associated with the pipe material. Metal chimneys are characterized by low thrust, as they instantly heat up and cool down quickly, and cold air falls down.Therefore, the most reliable in this respect are the classic brick structures.

Disturbance of ventilation

Pipe Location

The lack of ventilation in the room, where the furnace is located, can also lead to such a phenomenon as reverse thrust. It is necessary to check whether there are drafts in the room and how strong they are. If the wind is walking in the house, then it can knock down any direction of smoke.

For example, very often there are air currents, which are the result of the presence of stairs to the second floor. Therefore, it is not necessary to open the windows of the ladder, if it is located above the level of the furnace.

Important! With any design of the furnace or fireplace, a gas or solid fuel boiler in the chimney, an additional vent channel. It helps to protect the operation of any heating unit.

Placing the chimney

This factor, like the location of the chimney, also has a large effect on the magnitude of thrust. For example, if it is located in the interior of the house, this not only positively affects the heating capacity of the furnace, but also maintains good traction even in severe frosts.

But the pipe placed on the outside of the building along the outer wall, with insufficient warming, warms up much more slowly, and it often forms condensate, which prevents the passage of smoke.

External factors

The cause of poor draft in the chimney - trees

Smoke can enter the room due to too high humidity in the street or in strong winds. Also, the reason may be a higher temperature on the street compared to the house, which creates a pressure difference. In this case, the owner of the house when igniting the oven will certainly hear the characteristic smell of burning. It should immediately open the window and ventilate the room well in order to remove the smell of smoke and simultaneously equalize the temperature.

A frequent cause of reverse thrust is the wind, causing turbulence over the roof. This can occur when in the immediate vicinity of the chimney there are tall trees or roof structures in the form of dormer windows and extensions, which are horizontal above the pipe itself.

Problem solving

To cope with the problem of reverse traction will help a special device - a deflector or a rotary turbine, installed on the top of the chimney. These devices are a mechanical fan. Its main purpose is to suck smoke from the chimney's chimney at the expense of a special nozzle. Rotating due to the force of the wind, it creates a vacuum of air in the chimney, so that the thrust is improved.

Also worth checking the gate - a special damper, which regulate traction. One slide is located in the duct of the chimney, and the second is usually in the oven or in its door. Several times change its position, thereby increasing the pull in the pipe and, possibly, by that you will solve the problem.

In some cases, the return thrust can occur only for 1-2 days, for example, when the furnace has not been used for a long time, or because of the wet weather.

Eliminate the causes of poor traction

How to act in this case, and is it possible to solve the problem with your own hands? All is simple enough - find the reason and eliminate it. For additional safety, use the chimney draft stabilizer. To get rid of cold air in the pipe after a long break in the kindling, you can use ordinary paper. To do this, it is necessary to burn some of it, thus heating the air in the furnace and the chimney. Then, according to the laws of physics, he can rise upward, pushing cold masses out. After this procedure, you can safely melt the furnace - there will be no problems.

Another point - you need to clean the chimney in time, and if possible, then install a special tee in the chimney for its quick and high-quality cleaning.

Conclusion

The safety and efficiency of the heating devices depends on the draft in the smoke channel. As soon as the first signs of problems with this design are noticed, it is immediately necessary to check the patency of the pipe and to decide the issue of improving the draft in the chimney. Penetration of carbon monoxide into the house is very dangerous for people living in it. All repair work is quite realistic to do by oneself. But if you do not have the skills, you can invite specialists who will solve the problem and make the operation safe.

The directional movement of combustion products along the flue ways is a fundamental factor for the efficient and safe operation of almost all heating devices. There is a movement of air masses in the chimney at a difference in pressure, temperature and density, between the air in the smoke channel and the atmosphere. Warm air in the chimney has a lower density, and tend upwards, and its place is taken by cooler air masses.

But there is such a thing as a reverse pull. The manifestation of this effect can be seen immediately and with the naked eye - the smoke from the combustion of the fuel, goes not so much as it is put in the chimney, but moves into the room, thus creating the danger of poisoning the person with combustion products and carbon monoxide. Why is the return draft in the chimney and how to deal with this phenomenon, we will consider in this publication.

The causes of this phenomenon

Reverse traction, as it became clear from the foregoing, there is an effect, and there may be several reasons for this. And above all, the main cause of poor draft in the chimney, and correspondingly the appearance of this effect, is the incorrect design of the heating system and failure to comply with the rules for the use of building materials for the arrangement of the smoke removal system. Among other reasons, the most common are:

Banal clogging of the chimney.
Wrong calculation of the cross section of the chimney.
Non-observance of the height of the smoke removal system.
The presence of horizontal and narrow sections in the chimneys.
The location of the chimney in the zone of "wind".
Incorrectly organized ventilation system of the room and insufficient supply air.

But it often happens that the phenomenon of reverse traction occurs suddenly, on previously normally operating equipment. This can occur due to unfavorable weather conditions, such as strong wind, fog or high air temperature in the street during the summer. Each of these causes is able to deploy the direction of the combustion products, thereby stopping the normal process of smoke removal from the heating devices.

How to determine the insufficient draft in the chimney system

If the reverse traction is visible to the naked eye, then a bad draft in the chimney should be determined, and it must be done before each start of the heating devices. Several basic methods are used for this.

Tip:
If suddenly the draft in the chimney is gone, then, first of all, it is necessary to determine the cause of what is happening. Visual inspection of the smoke channel is the first thing to do. Often, you just need to clean the chimney, and the effect of reverse traction in it will disappear.

Reverse draft and ventilation

Many users of stoves and fireplaces, especially after repairs in the house, say that: "There was a return draft in the chimney, what to do about it." All immediately interested in solving the problem, but few people wondered why it was after repair in the room that this phenomenon appeared.

Very often, the effect reverse traction appears in homes with established plastic windows and high-quality doors. Most often, when replacing windows and doors, the owners of premises do not think that after such alterations the normal functioning of the ventilation system ceases.

Strangely enough, the appearance of this effect is directly associated with ventilation, or rather, with its absence. Warm air has a lower density and therefore tends to rise. When heated in a heating appliance, the air masses rise up the chimney, and the colder air rushes into its place. But in the process of work, it may happen that a low pressure area will gradually appear in the sealed room and the discharge will become so strong that it will start to draw fresh air from the chimney by "overturning the draft" and turning the smoke in reverse side. The better the draft in the chimney, the longer there will be no effect of the reverse movement of the combustion products, but without sufficient supply air this process is inevitable.

In order to solve this problem, it is necessary to organize the influx of air masses from the street. This can be solved in several ways:

Creating an influx of air masses through loosely closed windows, doors or windows.
Installing the inlet wall valves.
Mounting inlet valves on the PVC windows.

Each of these measures will facilitate the penetration of street air masses into the house, preventing the reduction of pressure in the room and the formation of the effect of reverse traction. What a way to choose, it is best to consult a specialist.

Ways to improve the removal of combustion products

Do not forget that even with the best ventilation system, the smoke removal will be ineffective if the chimneys are blocked or incorrectly designed. With the wrong project, there is only one way to fight, the chimney dismantling and complete rework.

If there is a defect in the chimney ducts that reduces the flue gas discharge, several devices can be used that will improve this process.

Reverse traction is a very dangerous phenomenon, and not only by the appearance of carbon monoxide in a residential building, but also by a spark directed into the room. At the first manifestations of this effect, you should stop using the stove or fireplace, try to determine and eliminate the cause yourself, and if this does not give a positive result, immediately contact the specialists.

Most heaters can not function properly without a properly equipped chimney. His normal work involves ensuring sufficient traction. It is formed in the smoke channel due to differences in temperature and density of smoke and air. This parameter is one of the most important, it determines the efficiency of the equipment. Insufficient, and even more so, the return thrust in the chimney does not allow toxic combustion products to escape into the atmosphere. They enter a residential building, which is dangerous for people's health and does not comply with fire regulations.

Reasons for reverse traction

A draft that removes smoke from an operating heater is considered sufficient if its values are in the range of 10 to 20 Pa. At lower rates, gases will flow into the room. The appearance of reverse thrust is associated with several reasons:

Defect of the construction. At its heart most often lies the incorrectly calculated ratio between the furnace and the diameter or height of the chimney.
Insufficient height of the chimney, which leads to a small difference in pressure and, accordingly, insufficient draft.
Extreme climatic conditions: fog or rain, high humidity, strong wind, high air temperature.
A large number of narrow fumes, which trap gases inside the structure.
The roof ridge is located above the smoke channel. A certain direction of the wind in this case will give a sharp "rollover" of the thrust.
A taller building or other structure, located near the pipe, forms a so-called windprick area, which prevents normal draft.
Lack of fresh air and difficulty with internal ventilation.

Wizards propose first of all to pay attention to these factors, since they often become the causes of the problem. Although in some cases, other damage may occur. And maybe you just need to clear the clogged chimney-drain channel.

In what ways can you increase the thrust?

Start work should be with the definition of traction in the smoke channel. Ideally, this can be done with a special device. The most accessible of them is an anemometer. The device allows you to measure the thrust, provided that the air speed is greater than 1 m / s. Less likely, he probably will not determine. However, it should be borne in mind that if measurements are made in the off-season, when the temperature difference between the room and the street is minimal and there are practically no air flows, the anemometer will give inaccurate information. For accurate measurements, highly sensitive instruments are used, with which specialists work.

You can try to evaluate cravings with the help of folk ways. The simplest and most commonplace is visual. If there is smoke in the room, then there is no traction. You can also analyze the color of the flame. White shades and rumble indicate excessive craving, dark orange shades - about insufficient. Golden-yellow tones of flame - a sign of normal traction. Another visual method is to estimate the deviation of the flame of a burning match, smoke from a cigarette or a thin sheet of paper brought to the chimney. The mirror installed in the smoke hood and facing towards the smoke channel should not be misted. Condensation on the glass - a signal about problems with smoke removal.

The flames of the candle deflecting towards the chimney clearly indicate the presence of at least a small thrust. Precise values can only be determined by a special device

If problems with smoke removal have been identified, installation of various variants of traction amplifiers in the chimney can help.

Method # 1 - installation of the deflector

This aerodynamic device enhances traction in the smoke channel due to deflection of air flows. In operation of the device, the effect of pressure drop is applied at the time when air is obstructed by air. Various models of deflectors are produced. They are selected according to the values of the wind load and the diameter of the chimney. The efficiency of devices increases in windy weather. In the absence of wind, they are practically useless and even worsen traction.

The deflector deflects the air streams and thereby increases the draft in the chimney. There are many models of this device

When choosing a device, you should prefer options that are made of stainless steel. They are resistant to corrosion, high temperatures and more durable.

Method # 2 - installation of the stabilizer

The device is an extension in the form of an umbrella on chimney. From below, an open area is planned for unhindered access to air. A special design of the chimney draft stabilizers allows full control of the airflow level.

Under the hood of the umbrella, a sensor can be installed that records the temperature of the rising gases. With the deterioration of the thrust, the accumulating combustion products will heat the temperature sensor and it will work.

Scheme for self-made stabilizer (d - diameter, all other parts are calculated from it)

Method # 3 - increase in the height of the smoke channel

The easiest way to significantly increase the draft in the chimney is to add the height of the pipe. In doing so, one should be guided by common sense. It is generally accepted that the optimal dimensions of the smoke channel are on the order of 5-6 m from the top of the pipe to the grate. These parameters also need to be guided. In addition, it should be taken into account that the inclined and horizontal sections of the chimney reduce draft, they are best avoided.

Method # 4 - use of rotary turbines

The device enhances traction by using wind power in a turbine installed above the chimney head. The turbine nozzle always rotates in one direction and creates a vacuum over smoke channel. In addition, the device design protects the pipe from rain and the possibility of getting inside debris. The disadvantage of the device can be considered the impossibility of its functioning in windless weather. In addition, in the season when the heating is switched off, the turbine continues to operate and can create increased traction.