How nice it is to warm up on a cold winter evening by a warm stove or fireplace! The crackle of logs coming from the firebox has a very relaxing effect on the human body. The heart becomes warm and light.
What is smoke draft?
A person who has recently become the owner of his own house with stove heating is interested in what to do if there is a reverse draft in the chimney. This phenomenon is noticed immediately and occurs in the area of the chimney. It is formed as a result of the heating and chimney duct not working properly. As it turns out, there are many different factors that lead to this phenomenon. In order to choose a way to deal with this problem, it is necessary to understand this issue as carefully as possible.
Reverse draft is a flow of flue gases, tending not upwards, as any stream of warm air should, but into the room where the stove is located. The main reason for this phenomenon can rightfully be considered the indicator of the difference between the pressure created in the furnace and the street pressure. howthe result - the flow is directed along the path of least resistance.
The formation of reverse draft occurs when the flue gases, which, in fact, are formed during the combustion of fuel, are not directed through the pipe to the street, but move down, that is, into the house. Also in parallel with the concept of reverse thrust, there is such a thing as its overturning. At the same time, smoke also rushes into the room in a stream. So, let's try to give answers to the question of what is reverse draft in the chimney, what to do, how to restore the system's performance.
Draft standards
A person cannot but grieve that there is a reverse thrust. What to do - can be solved only by carefully understanding the origins of the problem. It is very important that the chimney channel works in full mode. In the event that any failure occurs, the fuel does not burn completely. This, in turn, leads to the accumulation of smoke in the furnace area. It reaches a certain volume and after that it begins to stand out in the free space, which is the room. This does not fit into any fire regulations and has a negative impact on human he alth.
It's also not good to have too much thrust, as it leads to excessive heat loss. In view of this, the oven is very hot, which can cause its deformation and even fire. Therefore, you need to carefully monitor the condition of the entire heating system. The average pressure in the chimney area should be 10-20 Pa.
Chimney backdraft: what to do?
Reason for appearance:
- Low chimney. This results in a small difference in pressure. As a result, very poor smoke draft or its complete absence.
- Incorrect installation design. This is an incorrect ratio between such parts of the heating system as the combustion chamber, the height, and the diameter of the chimney.
- A wind head created by a taller building nearby.
- Poor ventilation and insufficient supply air.
- Atmospheric indicators.
- If the ridge of the roof is above the level of the external chimney, then in strong winds the draft may tip over.
- Clogging the pipe with a wide variety of debris.
Only when it is known what caused the reverse draft in the chimney, what to do and how to improve the operation of the stove will be immediately clear.
Backdraft detection
In order to answer questions about how strong the reverse draft in the chimney is, what to do, what methods of struggle are suitable, it is necessary to initially determine the fact of its presence. It is possible to determine that there is a reverse draft in the area of \u200b\u200bthe chimney channel using 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 ifat the time of the check, there is a sufficient wind flow, the indicator of which exceeds the mark of 1 m / s. If its value is lower, then the determination is impossible. It is very bad when, according to the testimony, it is established that there is a reverse draft in the chimney. What to do to fix it?
Since it is not always possible to use special devices, in this case 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 direct evidence that there is direct draft. Special attention should be paid to the color of burning fire. If the flame is more dominated by white color, we can talk about high thrust. In addition to color, this is evidenced by the sound that comes from the firebox. It's more like a hum. The orange color of the flame indicates that there is no draft. The golden color of the fire is characteristic for the correct level of traction.
When determining thrust, the most ordinary matches or a sheet of paper will come to the rescue. If at the moment of burning a match or a sheet of paper there is a deflection of the flame, then this indicates that there is a thrust.
In the event that you need to determine the absence of smoke draft, you just need to look into the middle of the firebox. If there is a lot of smoke in the cavity, this means that there is no draft. It is necessary to take this phenomenon with a high degree of responsibility, since it can lead to the fact that gases begin to leave the furnace and accumulate inroom. If it is found that there is a reverse draft in the chimney, what to do should be decided as soon as possible.
Deflector installation
If you managed to figure out the main reasons, and it turned out that as a result of deviations in the air flow, a reverse thrust occurs, what to do with it, the deflector will decide. This is a special device, the work of which is based on the aerodynamic effect. It reduces the pressure level as soon as possible in the event that certain obstacles arise in the way of air flows. The high quality of this device is noted in strong winds.
Install stabilizer
Installing the stabilizer is carried out in the cavity of the smoke channel. There is a special hole at the bottom of the case, thanks to which free air circulation occurs. Due to the fact that the stabilizer has a special design, 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 controls the temperature of the exhaust products of combustion. If the draft suddenly worsens, and as a result, smoke accumulates in the pipe, which leads to heating of its walls, the sensor immediately works.
Using a rotary turbine
A rotary turbine will help if there is a reverse draft in the chimney. What to do and how to fix it, she will help decide. Work is carried out through the use of wind energy generated inturbine. It is installed directly at the very top of the chimney. Due to the fact that the turbine constantly rotates in a certain direction, it rarefies the air in the area of the smoke channel. But this is not the only function that this device performs. It prevents debris particles from getting inside. Despite such significant positive features, the rotary tube has its own definite drawback. The thing is that it continues to work continuously even during the end of the heating season, that is, in summer. This, in turn, leads to a strong increase in the draft level in the chimney area.
What threatens the incorrect operation of the heating system
Good and safe operation of the heating system directly depends on the level of smoke draft. If the very first signs of a problem appear, it is necessary to check, and in case of detection of certain malfunctions, it is necessary to eliminate them as soon as possible. In some cases, poor draft leads to the fact that carbon monoxide enters the room. As you know, it is very dangerous for human he alth and in some cases can even lead to death. Most existing faults are quite possible to fix with your own hands. If there is no experience or skills, it is better to seek help from specialists in this field, who will effectively perform all the necessary work in the shortest possible time.
Temporary backdraft
In some cases, backdraft is not permanent but rather temporary. We answered the question: "If there is a back draft in the chimney, what should I do?" Restoring the normal process will take quite a bit of 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 air, and it is this that prevents normal draft. As a rule, smoke can completely fill the room in a short time. In such cases, a draft stabilizer installed in the chimney cavity will help to get out of this situation.
