Forced chimney fan. Effective ways to increase chimney draft. Features of chimney structures

The most important parameter The operation of the chimney system is draft. Everyone knows that it is very important for the operation of a furnace or boiler, but few people know - what is draft? This parameter determines the speed and volume of movement flue gases along the chimney. It is necessary to remove gases and supply oxygen to support the combustion process. The phenomenon of draft itself occurs due to the different densities of cold and hot air. Hot is less dense and is accordingly replaced by cold. This is how hot flows move from bottom to top.

These factors are the main ones, but not the only ones. Most often, traction depends on correct calculation chimney design - optimal cross-section and number of corner elements.

Failure to comply with the above conditions is often the cause of poor traction. But how can this indicator be determined without special instruments and devices?

Determining traction yourself

If the efficiency of the furnace (boiler) has noticeably deteriorated, then there are several ways to check the draft. You can use a special device - an anemometer, but in most cases, purchasing it for home use economically ineffective. It is best to resort to proven folk methods:

Candle. If you light a candle, bring it to the chimney and immediately extinguish it, then in the direction of movement of the smoke you can see whether there is a draft.
The degree of smoke in the room.
Thin leaf. The degree of its deviation may indicate the presence of traction.

Once the problem has been identified, you can begin to solve it.

Ways to improve traction

There are several ways to improve your cravings, and each of them is effective in its own way. But before you start implementing one of them, you should do a number of preventive procedures with the chimney structure itself:

Soot removal(). To do this, use a special set consisting of a ruff, a sinker and a steel rope.

Inside this structure there is a ventilation system that creates an artificial air flow in the chimney. It creates a rarefied air area inside the chimney, thereby improving the conditions for good draft. But to install it, you will need to connect an electrical line, which is not very convenient, since it will be necessary to comply with all safety regulations.

As can be seen from all of the above, it is possible to improve draft in a chimney, and this can be done effectively and quickly. But to choose the optimal method, it is best to take the advice of professionals who will carefully analyze the condition of the chimney.

When operating a stove, fireplace or boiler, most owners of private houses and cottages note a significant deterioration in the combustion process.

Most often this is caused by a change in traction parameters. To improve the quality characteristics, you should install a chimney draft amplifier, which, due to the simplicity of its design, can be made independently.

Causes of deterioration in traction

First you need to determine the cause of the deterioration in traction. Therefore, first of all, the general condition of the chimney and all associated elements of the system is checked.

This is done very easily. First, the entire heating system is completely turned off, after which the amount of soot in the chimney is measured using a long probe. This value should not exceed 2 mm.

The reasons for insufficient draft in the chimney are conventionally divided into 2 groups: external factors and design features.

Among design features:

the use of tees, elbows along the smoke exhaust duct, bypassing obstacles that create aerodynamic resistance;
incorrect installation and adjustment of the damper;
incorrect height and diameter of the chimney, which does not meet the requirements of the manufacturers of heating or water heating boilers.

External factors mean:

placement of the draft outlet below the roof ridge, which under certain conditions can lead to a draft “overturning”;
the presence of large objects near the chimney, forming an area of high pressure or, conversely, vacuum;
the predominance of strong winds in the region or, on the contrary, calm,

All this can have a significant impact on the traction force and create additional resistance, thereby reducing its level. To avoid this, it is imperative that you take certain steps to increase or stabilize the draft so that your furnace or boiler operates more efficiently.

Methods and devices

For normal functioning chimney, the upward flow should have a pressure of about 10-20 Pa. To determine the level of thrust, anemometers are used, and based on their readings and the results of fuel burnout, a decision is made - to increase or decrease thrust.

Eat various options how to bring traction into compliance with standards:

chimney extension;
use of special devices;
use of electric smoke exhausters;
traction stabilizers.

Chimney extension

The easiest way to eliminate low draft is to lengthen the chimney pipe. Due to the increase in the difference between the levels of the chimney outlet and the boiler, the difference in pressure of the upward flow also increases. For a chimney, the most suitable height is 5-6 meters, subject to the minimum distance between the vertical section of the chimney and the stove or boiler, and the absence of all kinds of bends, narrowings and deviations of the shafts.

If you have a high roof or there are large objects near the house that significantly impair traction, this method makes it possible to achieve best result. However, with a very high chimney, the draft level can greatly exceed the required value, as a result of which the bulk of the heat will be released in environment, and not spent on heating the premises. To prevent such a situation, special dampers are used to reduce the volume of exhaust gas.

Deflectors

A deflector is a device that allows you to optimize air flows to enhance draft in a smoke exhaust or air duct pipe. The deflector is translated as a guiding device, reflector. The name, in principle, fully describes its purpose and functionality.

How simpler design, the greater the efficiency, since the flows reflected from the roof and side winds increase the traction force and suck smoke from the chimney. The deflector, even in heavy winds, prevents the thrust from tipping over, but in calm conditions it is ineffective. The model of the chimney draft amplifier should be selected not only according to the size of the smoke exhaust duct, but also according to the expected wind load.

If you have the desire, a sheet of galvanized iron, a minimal set of tools, available materials and even minor skills in working with metal, you can make such a device yourself.

To make the device you will need:

square;
roulette;
metal scissors or grinder;
wooden hammer;
riveter;
hand electric drill;
set of drills;
drill bit self-tapping screws with a 15 mm press washer;
tin or galvanized 0.3-0.5 mm;
improvised material for fastenings.

After carrying out the calculations and drawing the contours of the parts onto the metal, we perform the following:

cut out all the necessary parts;
roll up the nozzle body and fasten the edges using self-tapping screws or rivets;
assemble and connect both cones of the device;
Before assembling the umbrella, you need to install pins in the lower cone to attach it to the common body, and if the installation will be carried out on legs, then they can be fixed from the outside with rivets.

It is worth remembering that all connections of the draft amplifier in the chimney must be strong, since it can be exposed to strong winds. The video completely shows the process of creating a deflector with your own hands.

Such chimney draft amplifiers not only tolerate flue gases and high temperatures well, but also have corrosion resistance and durability.

Vane

The weather vane is another draft amplifier with a fairly simple design without extending the smoke exhaust pipe, and also dependent on wind strength. However, this device, unlike the one described above, creates virtually no resistance in calm conditions. A wing is installed on the head small size, which protects the edge of the chimney from the wind from only one edge.

Thanks to the auxiliary blade, and its placement opposite the place where the weather vane is fixed on the chimney, the device constantly closes the mouth from air flows, which, flowing around it, create a vacuum at the outlet, thereby significantly increasing draft. Manufacturers advise using such devices for chimneys wood fireplaces in case of insufficient or unstable draft, in case of strong winds or in the formation of air vortices above the smoke exhaust duct, due to the unfavorable location of the pipe.

Rotary turbines

Rotary turbines are mechanical device, which uses wind energy to increase draft in the chimney. The turbine nozzle, regardless of the direction of the wind, always rotates in one direction, creating a vacuum above the smoke channel, which helps to increase thrust.

The design of such a draft amplifier allows you to protect the chimney from debris, leaves, precipitation and other things getting into it. A special feature of the turbine is that in calm weather it does not work; in the non-heating season, air is removed from the smoke channel, and in the presence of wind, high rarefaction is created and an increase in thrust.

It is not recommended to install such draft amplifiers on the chimneys of coal-fired stoves and wood-burning fireplaces. It is worth considering that the temperature of the flue gases should be no more than 150-250˚C. This device is effective for natural ventilation systems and smoke exhaust pipes of heating boilers operating on gas fuel.

Electric smoke exhausters

In some cases, for example when using wood stoves or fireplaces, it is permissible to install special electric smoke exhausters. These devices are designed for use in environments elevated temperatures, the presence of ash, condensate and other combustion products. However, it is strictly forbidden to install them on the flue pipes of solid fuel boilers, in which the gas temperature can reach 650-800˚C.

The operation of heating devices, as well as the safety of residents of houses with stove heating. Troubleshooting possible problems will help you feel comfortable and confident in your home. You can increase or adjust the pressure indicator with your own hands.

Useful information about chimney draft

All residents of country or private city houses are familiar with the concept of chimney draft. Do they know the essence of this term?

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

Using this process of aerodynamics, humanity began to use fireplaces, stoves, boilers, heating their homes with different types fuel - coal, firewood, peat, etc.

The following depends on a properly designed and constructed chimney and, accordingly, on good draft:

quality of room heating;
reduction in fuel costs;
safety in buildings with their own heating.

What influences the value

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

In-house moments

A number of factors indoors can significantly influence the presence/absence of draft and its strength:

The material from which the building is constructed.
Average room temperature.
The maximum volume of air space in the home.
The number of people permanently staying inside the dwelling.
The presence of internal sources that additionally consume oxygen (heaters, heaters, stoves, etc.).
Regular supply of fresh air (airing, ventilation).

External factors

There are other factors that determine the chimney draft, and they are located outside the heated room. It's about temperature external environment, atmospheric pressure, humidity, wind direction. Such a phenomenon as changing temperatures during the day can also affect draft - due to the movement of cold and warm layers of air.

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

Chimney design features

The draft may vary depending on the design characteristics of the chimney:

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

It is necessary and possible to control the draft in a room using the “levers” of the first and third factors (intra-house and design). Natural changes, of course, do not depend on humans.

Keep the draft in the chimney under control - required condition safe and comfortable living in your own premises. If the draft is very weak, then it is almost impossible to light the stove and heat the home.

With reverse draft, the gases generated as a result of combustion are “thrown” into the living space, and not into the air through the pipe. This is very dangerous for human health and life!

With very strong draft, all the heat is rapidly drawn out through the chimney channels, without having time to warm the heated room to the desired temperature.

Why does reverse draft occur?

Weak thrust can become the basis for the formation of reverse thrust. How can you recognize that all is not well with cravings?

This is “spoken” by moments that can be seen with the naked eye: a lot of smoke in the stove, soot on the door, incoming smoke movement inside the house. In other words, smoke and fumes from the burned fuel do not go into the chimney through the chimney, but tend to enter the living space when the door is open and through cracks.

Causes of backdraft:

Design flaws of the chimney. Low pipe- increased risk of reverse thrust. The higher the pipe, the better the process of extracting exhaust gases and smoke. The optimal pipe height is about five meters.
Correspondence of pipe diameter to parameters furnace device. A powerful stove requires a chimney with a pipe of rather large cross-section. But the measure here is very important, because using a pipe that is too wide will make the combustion process unprofitable (the entire warm air will literally fly down the drain). It is unacceptable to use several pipes with different cross-sections in the chimney!
Use of non-smooth pipes. Unevenness, chips, roughness, etc. are an obstacle to good traction. Over time, the chimney opening may narrow due to soot deposits and other combustion elements and complicate the process of lighting the stove and its normal functioning.
Poor/lack of ventilation. Drafts, open windows in rooms located above the firebox, they do not help the fuel combustion process, but distort it, making it useless and unsafe.

Chimney channels made of metal are in many ways inferior brick pipes. Rapid heating and equally rapid cooling are not good for the heating system in general and the chimney in particular.

Reverse thrust can also appear for objective reasons beyond a person’s control. Strong gusts of wind, rainy, cloudy weather with high humidity are unfavorable moments in terms of the formation of problems with traction.

There is such a term as temporary backdraft. What is this? In this case, it is worth talking about temporary traction disorders, lasting for several days. After a certain period, cravings return to normal.

Temporary reverse draft can occur due to a cold room that has been unheated for a long time. Very cold air accumulated in the chimney pipe prevents the fuel from burning quickly. Therefore, smoke can be “pushed” out of the chimney into a home, bathhouse or other room with a stove or fireplace.

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

If problems with traction can be detected constantly or with a certain frequency, then it is necessary to take measures to eliminate bad traction.

Strength check

Before you try to fight bad traction, make sure that your traction really leaves something to be desired.

You can check the traction using special devices or yourself. Simple ways traction fixation:

Light a piece of paper and let it burn for a while. When you bring it to the stove or fireplace, extinguish the paper and observe the direction of the smoke. If it is directed towards the pipe - good thrust, deviates in the opposite direction - reverse thrust, if it remains “straightforward” - there is no thrust. Similar 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 of the cigarette smoke or the flame of a match or lighter near the fireplace or stove. Draw conclusions similar to the first point.
The flame of an ordinary candle can also help in determining the draft in the home.
A pocket mirror brought to the firebox and covered with condensation may indicate problems with removing smoke from the stove.
The presence of too much draft, which carries away useful heat from the room, is indicated by an audible hum in the stove - a loud hum.
The color of the fire in the firebox can be an indicator of different drafts. A golden hue means good draft, white flame means excessive draft, red color and black smoke means poor draft, high probability of reverse draft.

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

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

Troubleshooting Methods

If you have identified problems with traction, then, of course, they need to be eliminated as quickly as possible.

The choice of means to combat poor or reverse draft depends on the reasons that led to a normal operation chimney.

Pipe cleaning

One of the common methods of improving traction is cleaning the pipe. Fuel, burning in a furnace, releases various substances that settle on inner surface chimney. Soot sticks well to pipes if they are uneven or bent.

How to clean a chimney so that there is good draft?

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

After preparing about one bucket of potatoes, peel and cut them. Will also fit potato peelings. Throw a little into the firebox and wait. When burned, potatoes will release starch, which will become a means that can soften carbon deposits. Soft pieces of soot will fall off on their own, but firmly stuck ones will have to be removed mechanically.
Firewood from aspen. Heat the stove with two or three logs. They will heat up the chimney pipes very much and help get rid of carbon deposits. But this method requires special care, since the likelihood of a fire will be very high (soot may ignite).
Rock salt. This method is more suitable for prevention. Salt added at the time of combustion improves the condition of the chimney pipes.
Pipe brush. A heavy weight is attached to a brush suspended on a steel rope and lowered into the chimney openings. By lowering and raising this structure, you can force soot formations to fly off the walls of the pipes and fall into the furnace. These fragments are then removed from the firebox.

The second group of anti-particulate measures is based on the use of chemicals. The most popular chemicals for cleaning chimneys are “Log-chimney sweeper”, “Komichek”. Add to the coals formed during the heating of a stove or fireplace according to the instructions. chemicals and continue to drown. After all the fuel has burned out, it is advisable to leave the coals, since they continue to “work” in terms of cleaning the chimney (at least, that’s what the manufacturers advise).

Do not believe the spiteful critics who talk about the obligatory combustion of soot when used chemical method. This method does not pose any danger, since the beneficial effect occurs due to chemical reactions, and not due to the ultra-high combustion temperatures of the reagent.

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

Troubleshooting structural problems

If certain features of the chimney design are identified that negatively affect the draft force, adjustments should be made to eliminate them. These actions include:

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

Ventilation arrangement

In some cases, traction may improve if drafts are avoided in the house or bathhouse. You can help with traction problems by installing ventilation devices on the windows.

If there is no desired effect after all the methods described above, you should take into account modern devices to improve draft in the chimney.

Installation of devices

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

Special devices for regulation

Modern instrument makers have taken care of producing special devices that regulate chimney draft:

Regulators. They are installed on the chimney outlet to normalize draft in the heating system, and also as a means of influencing the heating efficiency.
Deflectors. Such devices are fixed to the chimney from the outside. The draft speed is improved due to the fact that the diameter of this device is much larger than the chimney pipe, and, therefore, an area of low pressure appears in it when air flows around it.
Chimney weather vane. It is a special design that performs several functions at once: improves traction, protects the pipe from raindrops and snow whirlwinds. The operation of the device is similar to the operation of a deflector; the thrust speed is normalized by reducing 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 draft require mandatory monitoring, especially in winter period. This is due to the fact that additional devices attached to the chimney from the outside can become clogged, iced up (in winter) and thereby prevent the normal operation of the chimney. Blockage caused by devices can cause backdraft and the penetration of carbon monoxide into living spaces.

Do not forget to regularly inspect the chimney and devices that help increase draft.

Photo gallery: traction control devices

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

Solving problems yourself

Let's try to make the heating process safe and efficient with our own hands. The most common way to combat soot accumulation in pipes is with a brush and a sinker.

Cleaning the pipe with a brush

First, let's prepare everything you need:

A hard bristle brush. The diameter of this device is selected taking into account the cross-section of the pipe (from fifty to three hundred millimeters).
A thin metal cable (can be replaced with a very strong rope or rope).
Weight for hanging from a brush.

Do not start work if there is strong wind or too much humidity outside. Try to think through and use reliable insurance to protect yourself from unforeseen events.

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

First, all inspection holes in the chimney are cleaned, and then they begin to clean the pipe itself. By making a few up and down motions, you can get rid of any soot that will fall from the chimney into the furnace. It is best to have someone else around the stove to signal efficiency and when to stop working.

Cleaning the pipe should be completed when the soot stops falling out.

You can also clean the pipe using improvised means, about which many videos have been made.

Video: cleaning a pipe with improvised means

Selection of devices for regulation

Let's consider some characteristic features and methods of using devices for monitoring and adjusting traction.

Such structures are installed on chimney(at its very top) to create obstacles to air flow. The intensity of the wind force drops noticeably when encountering such devices placed on a pipe. The smoke escapes through the channel “to freedom” due to weak air currents entering the pipe. These flows “catch” the exhaust gases and “push” them out.

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

There are several types of deflectors:

TsAGI;
round Wolpert;
Grigorovich;
plate-shaped;
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 additional functions: to extinguish sparks (to eliminate a possible roof fire), 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 possibility of reverse draft).

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

Photo gallery: types of deflectors

The most common device for improving traction Such a device can be purchased in specialized stores The choice of device depends on design features pipes and your preferences

Rotary devices

Turbines installed at the head of the chimney use the energy capabilities of the wind. Air flows set the rotary nozzle in motion (it always moves in one direction), and thereby the air becomes rarefied near the chimney. The entry of any foreign objects and sediment into the chimney with a rotary pipe is completely excluded.

Rotary pipes have a big disadvantage, similar to the operation of a deflector. Their use on a windless day is ineffective.

Traction regulators

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

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

The device operates completely autonomously and does not require any electrical current.

How to increase traction with your own hands: homemade devices

Before you start building a deflector yourself, weigh your strengths, review the available materials, and only then get down to business.

Drawings and diagrams

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

Photo gallery: ready-made diagrams of traction devices

You can find it on the Internet good help for the construction of the device Carefully study the device diagrams and choose the one that suits you The diagram shows the device of this device improved traction The diagram shows the components of this device

If you decide to test yourself and save money at the same time, arm yourself measuring instruments to determine the internal diameter of the chimney. Depending on this value, you can, based on the table, determine required parameters deflector height and diffuser width.

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

You can calculate the necessary parameters (for a specific pipe diameter) yourself using simple calculations. To determine the width of the diffuser, the internal diameter of the pipe must be multiplied by 1.2; We consider the width of the umbrella for protection to be -1.7 x d; overall height we find out the constructions if we multiply the value internal section by 1.7.

Having received all the dimensions, we make drawings for more accurate cutting. We draw diagrams on a sheet of Whatman paper or on the back of the remaining pieces of wallpaper.

It is best to construct a life-size drawing. When cutting, simply attach the cut paper parts to steel sheet and do not recalculate data taking into account the scale of the drawing.

We stock up on materials and tools

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

To make the deflector we will need:

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

Preliminary stage

The preparatory work consists not only in drawing out the details of the device, but also in cutting them out and trying them on. All paper elements are fastened with paper clips or a stapler and applied to each other. If everything fits, then you can carefully remove the fasteners and straighten the templates.

Do not be negligent in the process of creating a deflector; try to think about your safety. To avoid injuring your hands and to protect your eyes, use gloves and special glasses prepared in advance.

Let's get started

So, everything is in place, we can get started!

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

We transfer the parts cut out of paper onto a galvanized sheet. We should get developments of the following elements: cap, diffuser, outer cylinder and stand.
Using metal scissors, carefully cut out all the components of the deflector. In places where the cuts are made, the metal is bent with pliers to a thickness of half a millimeter and “passed” with a hammer.
The diffuser, cap and cylinder blanks are rolled up and holes for fastening are drilled (if bolts are used). Connections are made using rivets or bolts; in exceptional cases, welding can be used (semi-automatic).
To attach the cap we prepare 3-4 strips of metal. The dimensions of the strips are 6 by 20 cm. The strips, folded at the edges and tapped 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 secure the metal strips with bolts.
The other ends of the galvanized strips must be attached to the diffuser, thereby “looping” the cap and diffuser.
We insert the resulting structure into the shell.

You can watch the video about how to build a TsAGI deflector with your own hands.

Video: DIY TsAGI deflector

Deflector installation

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

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

We put the homemade device in place as a second, safer and in a convenient way. We will need a piece of pipe with a slightly larger diameter than the chimney pipe. Having stepped back about fifteen centimeters from the edge of the cut pipe, we mark and make holes; we perform the same manipulations on the wide part of the diffuser.

Attention! The drilled holes must match!

We fasten the pipe and diffuser using pins inserted into the holes. We screw the nuts on both sides - the pipe and diffuser sides and tighten them. During work, we make sure that there are no distortions or damage.

Using a clamp, tighten the structure with the deflector on the chimney pipe. Try to do this so that no gaps or gaps appear.

Process self-adjustment traction is necessary in order to live and relax comfortably and safely in a house with stove heating. For this you can use different ways that are suitable for your chimney design: cleaning the pipe with a brush, “chemical cleaning firebox,” installing special devices. Traction control devices can be purchased or made independently.

High-temperature fans are used in baths, saunas, and fireplaces to maintain an optimal microclimate in these rooms, removing smoke and excess moisture from the air.

This class of domestic exhaust fans is characterized by stability when operating in extreme conditions. high temperatures, they do an excellent job of their duties where other fans fail: at temperatures from 70 to 180 degrees Celsius.

Why is it very important good ventilation saunas? The fact is that during soaring, up to a liter of sweat can be released from the surface of a person’s skin, which accumulates in the air and settles on the ceiling and walls. Breathing these fumes is not at all beneficial. Excess moisture must be removed after the session to prevent fungus from forming on the walls.

How to choose a fan for a sauna?

The heat-resistant fan has a reliable housing made of glass-filled polyamide or metal.

Pay attention to the operating temperature in the product data sheet: fans with an operating temperature above 100 degrees are well suited for baths and saunas.

By the way, there is also a so-called “permissible” temperature; it can differ greatly from the “working” one. The permissible temperature shows the limits beyond which the product will not deteriorate, but it is not a fact that it will be able to function normally.

Since the humidity in the steam bath is quite high, it is desirable that the high-temperature fan has additional moisture protection electrical elements(IP protection class).

It is good that the sauna fan can operate in two modes. While steaming in the sauna, it operates at minimum power to avoid unnecessary drafts and electricity consumption.

As soon as the vaping is completed, the fan turns on at full speed and removes moisture accumulated in the room to prevent the formation of mold and mildew.

20.09.2017
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Pechnik (Moscow)

Fans to enhance fireplace draft allow you to improve the performance of both wood-burning and gas heating units. Such designs have a simple and mostly standard structure, however, despite this, the choice of such an installation should be approached with all responsibility and knowledge. You can get acquainted with all the most accurate and up-to-date information on this topic from the materials presented below, as well as by watching the video in this article.

Pros of use

If you don’t know how to increase the draft of a fireplace, we recommend installing a special fan-amplifier. This design has the following advantages and advantages in operation:

Proper operation without constant overheating;
Security additional source circulation air masses. This element acts as additional ventilation;
The fireplace will last much longer due to the slow destruction of the coating and manufacturing materials;
In a room with a stove installed, there will always be a brick fireplace optimal humidity air, which, if necessary, can be either increased or decreased by increasing/decreasing the combustion intensity in the flame;
The efficiency of the installation will be increased to the maximum limit.

Important: before increasing the draft in the fireplace, you will need to read the instructions provided by the manufacturer in as much detail as possible and during installation, as well as further operation, comply with all requirements and rules in order to avoid breakdowns and deterioration in the operation of the heating unit.

Interesting to know: if there is no draft in the fireplace, such fans will help solve this problem. However, they can only be used after the initial problem has been resolved and the furnace has been diagnosed by a specialist.

The operation of smoke exhausters is allowed under the influence of temperatures up to 250 degrees, and the design itself has reliable protection from corrosion, damage and rust, due to the presence of a special coating with a composition based on epoxies.

You can learn more about the various variations and models by looking at the photo selection presented in this article.

What can cause cravings to worsen?

If you do not know what the draft in the fireplace depends on and for what reasons it can worsen, it is important to know about a number of the most common reasons, which are as follows:

The chimney can be equipped various tees, knees and others connecting elements located along the channel through which the smoke passes;
Installation errors or possible incorrect placement of the valve;
Initially, the diameter and cross-section of the chimney pipe were incorrectly selected;
If there is no draft in the fireplace, the outlet may be located below the ridge on the roof. Perhaps this has already provoked a “capsize” of this element;
In the immediate vicinity of the chimney there are taller and larger houses, structures and other buildings. Thus, very high or, on the contrary, low pressure can cause deterioration in the operation of the traction mechanism.

Interesting to know: in order to perform diagnostics yourself, you just need to turn off all heating system and measure the amount and layer of soot and soot accumulated on the walls of the chimney. The thickness of such a layer should not exceed 2-3 millimeters.

Carrying out the device and extension

In order to establish the operation of the traction mechanism, one of the following options can be applied in practice:

Extend the chimney until the optimal size and dimensions are achieved;
Use additional fittings and parts;
Supplement the design with a purchased smoke exhauster electric type;
Buy traction stabilizers.

Cleaning and maintaining the product is a rather complex and time-consuming process.

Important: make sure that the pressure in the inside of the chimney varies from 10 to 20 Pa. In order to determine this criterion, it is recommended to use special devices, for example, you can use an anemometer, the price of which depends on the chosen model and manufacturer.

Interesting to know: the instructions for extending the chimney say that the optimal total length of this element should not be less than 5-7 meters, depending on the design features and number of storeys of the house. In this case, knees and narrowings should occur as rarely as possible.

Types of fireplace fans

Depending on your wishes and individual characteristics heating installation, you can buy and install one of the following designs:

Variety

Description and features

Deflector

It is distinguished by its strength, durability and resistance to rust and corrosion.

The installation acts as a reflector or an element projecting the direction of air flows.

Traction force increases due to the reflection of flows from the roof and side walls. Disadvantages include the ineffectiveness of the fan in calm conditions. However, in this case, the capsizing of such a device is completely excluded, even in very strong, squally and gusty winds.

The main selection criteria are compliance with the chimney diameter and calculation of the wind load.

One of the simplest and inexpensive options. Its functionality and the influence of traction force directly depend on the intensity of the wind.

The design consists of a head and a wing with small dimensions. The design is also complemented by a special blade, which fixes and secures the weather vane to a given section of the chimney pipe.

The weather vane is most often used to increase the level of draft in solid fuel boilers working on simple logs or purchased briquettes.

Rotary turbine

The operation of such mechanical means is carried out by rotating turbines from wind flows.

Due to the presence of special attachments built into the design, rotation is carried out exclusively in one direction, regardless of the direction of the wind itself.

The advantages of this variety include high-quality protection from getting into inner part chimney of various dirt, leaves, foreign objects and sediment. Such amplifier fans are capable of removing air efficiently, which is especially important during the non-heating season.

Suitable for solid fuel and gas boilers with a maximum permissible temperature limit of 250 degrees.

Electric smoke exhauster

This variation is intended for stoves and fireplaces running on solid fuel. The advantages of such devices include their versatility in operation (in conditions exposed to high temperatures, the formation of large amounts of condensate, soot and other combustion products).

Maximum allowed temperature regime for such devices has a limit of 800 degrees.

Work and operation are carried out using special temperature sensors, which, if necessary, can both slow down and increase the fan rotation speed.

Making a deflector with your own hands

To assemble we will need to use:

Scissors for cutting metal and a square;
Roulette and wooden hammer;
Riveter and hand-held electric drill;
Drills and self-tapping screws with a press washer of 1.5 centimeters;
A sheet of tin or galvanized metal with a thickness of about 0.2-0.6 millimeters;
Fasteners.

Assembly instructions.