Removing gases and smoke from heating appliances is one of the main components of ensuring comfort and safety. It is not enough to choose the chimney you like in the photo in a private house; it is important to take into account the possibility and nuances of its installation. The efficiency of removal of combustion products from stoves, fireplaces, gas, liquid and solid fuel boilers depends on the correct installation. Study the requirements and become familiar with the standards, even if you do not plan to do the work yourself.
The most popular configuration of a modern chimney in a private house
Basic requirements for chimneys
The chimney is designed to remove combustion products and create draft during the operation of heat generators. It must be resistant to high temperatures, moisture and sulfuric acid formed upon contact flue gases with condensate. The walls of the pipeline should be smooth so that less soot accumulates.
Requirements for the installation of chimneys are regulated by special state regulations: SNiP 41-01-2003; VDPO (Rules for the performance of work, repair of furnaces and smoke ducts); SP 7.13130.2009.
The main ones are the following:
- cross-sectional area chimney or the channel must be greater than or equal to the area of the heat generator outlet pipe;
- at the base of the channel it is necessary to arrange a pocket 250 mm deep for cleaning and/or a pipe for removing condensate;
- you cannot use more than three turns;
- the pipe must be rotated with a rounding radius of no more than the diameter;
- connecting elements at intersections building structures prohibited;
- the length of the horizontal section is allowed a maximum of 1 m;
- bends and tees should not bear the load from the elements located above them;
- if the roof structure contains flammable materials, a spark arrester with a cell no larger than 5x5 mm must be installed on the head of the pipe;
- When working with a natural gas heat generator, the head must always be open without umbrellas or other coverings.
Gas exhaust system design
What should be the height of the chimney?
A necessary condition stable and reliable operation Almost all heat sources depend on the presence of good draft. It occurs due to the difference between the temperatures of the exhaust gases and the outside air. As this difference increases, craving increases. It directly depends on the height, characteristics and correctness of the chimney.
The action of the wind can enhance the natural draft in the pipe, or it can interfere. At favorable conditions horizontal wind flows, colliding with the chimney, change their direction and move from bottom to top, as a result, a vacuum is created at the outlet, and combustion products are literally sucked out of the chimney. If there are other obstacles, the wind can be directed from top to bottom and create a reverse movement of gases - reverse thrust, which leads to smoke in the room.
Scheme for determining the height of the chimney
The normal movement of the wind can be interfered with by any tall building located nearby, including part pitched roof. Therefore, the height of the chimney is determined taking into account the distance to the ridge according to regulatory scheme.
Wherein overall height pipes from the heat generator must be at least 5 m, for gas boiler– at least 3 m.
Features of chimneys made of different materials
A chimney in a private house can be made of the following materials:
- brick;
- ceramics;
- steel.
It is impossible to give preference to one of them and select a clear favorite. Right choice suitable material for the construction of a chimney can only be done taking into account a complex set of influencing factors. First of all, it is necessary to analyze the specifics of operating conditions, the properties of each material and prices at the time of comparison.
Stove ceramic chimney
Scope of application of a brick chimney
A brick chimney is usually less expensive than other smoke removal systems. It can withstand high temperatures and even soot fires. Its main disadvantage is the bulkiness and complexity of the design. Built on a foundation or reinforced concrete floor. When working with stoves, fireplaces and wood-burning boilers, it is very reliable and durable, since the high temperature of the flue gases prevents the formation of condensation. In other cases it quickly collapses.
Brick chimney from fireplace
To build a brick chimney in a house with your own hands, you must have the special skills of a stove maker and mason. The trunks should be free of cracks and any irregularities. This is a serious construction that requires qualified workers.
Restoring a brick chimney can be done independently. You just need to insert a special flexible corrugation of the appropriate length into the channel from above.
Stainless steel chimney inside brick pipe
Advantages of using ceramic chimneys
A ceramic chimney is also relatively inexpensive. It is characterized by increased strength and the ability to accumulate heat. High fire-resistant properties allow its use in high-temperature systems of solid fuel heat sources. The ceramic pipe can withstand heat up to 1200°C when soot ignites. Service life at proper care equals the service life of the building.
Ceramic elements different sizes are connected using special grooves and sealed with fire-resistant adhesive-sealant. Ceramic pipes can be installed openly and in shafts made of bricks or special hollow blocks, installed inside and outside the house.
Ceramic chimney pipes
For new construction, it is very profitable and convenient to use system chimneys made of ceramic pipes laid in special shafts. They are good decision for all types of fuel-burning equipment.
Characteristics and types of steel chimneys
A steel chimney is easily assembled according to the principle of a designer. Wide choose shaped and fastening parts allows you to create almost any configuration and install a chimney in a private house, both during construction and during the operation of the building.
Taking into account the requirements for resistance to corrosion and acids, pipes are made not from ordinary, but from galvanized or of stainless steel. Stainless steel is noticeably more expensive, but has a longer service life.
The scope of application of steel products is limited to systems with relatively low flue gas temperatures, since according to SNiP 41-01-2003 their maximum temperature is 500°C. Accordingly, use with solid fuel boilers undesirable.
Steel smoke removal systems are very convenient for installation in already occupied houses, as they are installed quickly and do not require a foundation, plaster or cladding. At the same time, they are noticeably more expensive than brick and ceramic ones.
Chimneys with two walls are also made from steel, using the “pipe-in-pipe” principle. They are called coaxial. These are used for condensing and turbocharged gas boilers with closed chambers combustion. The air required for combustion is taken not from the room, but from the street.
Coaxial chimneys combustion products are removed through the inner pipe, and combustion air is supplied through the outer pipe. Their assembly is carried out similarly to single-wall steel ones. Installing a coaxial type chimney has the lowest cost.
Coaxial chimney installation kit
Necessity and methods of insulation for a chimney
A safe chimney design requires its insulation. Pipelines must be insulated to protect against possible freezing of condensate. In addition, retaining heat in the chimney increases the efficiency of all types of fuel-burning equipment.
Ceramic pipes are wrapped with mineral or basalt wool. The same insulation can be applied to an old asbestos-cement pipe, enclosing it in a galvanized steel casing. It is possible to use expanded clay, broken brick or other hollow material with filling to fill the gap between the asbestos-cement pipe and the casing cement mortar.
Insulation of ceramic pipeline
The most budget option The protection of a steel chimney is the use of foil-lined mineral wool insulation.
It allows you to quickly and easily insulate not only a new, but also an existing pipe. The result, however, is short-lived, since regular exposure to wind leads over time to fraying of the insulation, and wet cotton wool ceases to be a heat insulator.
Sandwich chimneys, which already contain a layer of insulation, do not have this drawback. Moreover, they are as easy to assemble as single-wall steel ones. The widespread use of this particular option is limited only by cost.
Elements of an insulated sandwich type chimney
Very good choice is the installation of a chimney in a private house from ceramic pipes in a steel casing, which combines the advantages of ceramic and double-walled steel systems. It is suitable for absolutely all heat generators, but is still rarely found on the domestic market.
Quite good results are obtained by the more economical folk method manufacturing an insulated chimney: the pipe is assembled from galvanized steel and wrapped mineral wool and is enclosed in aluminum corrugation. It turns out to be a homemade “sandwich”. This is certainly troublesome, but noticeably cheaper than standard ones ready-made solutions.
Economy option metal chimney sandwich type
Procedure for installing a metal chimney
Every person who has ever assembled a construction set can figure out how to make a chimney in a private house from galvanized or stainless steel. Components modern systems metal combustion product outlets are simply inserted into each other. The joints are sealed with heat-resistant mastic or sealant and secured with clamps.
Installation starts from the bottom, that is, from the heat generator. The connection is made “through condensate” against the movement of flue gases. This will prevent condensation from flowing out and possible icing of the chimney.
Performing a pipe passage through the roof
If the chimney passes through the roof, then to protect it from precipitation, use an adjustable metal apron with an inclination angle corresponding to the roof (0-15°, 15-30°, 30-45°). If the pipe rises above the roof by more than 1.5 m, then it must be fixed using guy wires.
Fastening the chimney and passing through the roof with the installation of an apron
To seal the intersection of the chimney with the roof, you can use universal rubber seals. Depending on the slope of the roof, straight or corner type. It is only necessary to take into account the range of their operating temperatures.
Chimney passage through the roof with Master Flash sealant
The procedure for working with a universal rubber seal is very simple. It is necessary to cut the top in accordance with the required diameter, put it on the pipe, coat the bottom well with heat-resistant silicone and attach it to the roof using a screwdriver.
Installation procedure for universal rubber seal
With steep roof slopes, there is a risk of damage to chimneys from snow avalanches. To protect pipes when snow slides off the roof, you can install special metal dividers, as shown in the photo of a chimney on the roof of a private house.
Metal dividers to protect against snow sliding
Pipe passing through a wall
To avoid difficulties associated with creating an opening in the roof and its subsequent sealing, they usually try to use a chimney outlet through the wall, usually the back one.
This option implies only one intersection - with outer wall, which is easily isolated polyurethane foam, in contrast to the obviously complex and unreliable connection of a hot chimney to cold roof. In this case, the pipe is easily attached to the outside of the wall, does not affect the interior and is guaranteed to be free of leaks.
Checking the chimney before use
After completing the installation of the chimney, be sure to check the presence of draft. This is very important point, regardless of whether the chimney was installed in a private house with your own hands or with the help of specialists. Violations made during installation can lead to poor traction or even reverse traction. This is fraught with the accumulation of carbon monoxide in the room, which poses a direct threat to the life and health of residents.
- The draft can be checked using a mirror by placing it in the area of the smoke hood and pointing it towards the chimney. With good traction, it does not fog up.
- It is convenient to use a flame from a burning match, paper or candle. If the flame deviates in its direction when approaching the chimney, then everything is in order, otherwise operation is unacceptable.
To check the tightness of the joints and the absence of dangerous heating of structures adjacent to the chimney, a test firebox is carried out. At the beginning of operation, there may be an odor and slight smoke due to the evaporation of residual oil and crystallization of the sealant.
During further operation, its condition should be checked at least once a year, and before heating season carry out cleaning.
It is important not to forget about cleaning
To summarize, we should once again dwell on when and which chimneys are best to use:
- For wood stoves and fireplaces during the construction of a house - brick or ceramic;
- for wood-burning stoves and fireplaces in an inhabited house - ceramic in a steel casing;
- for gas, liquid fuel and pyrolysis boilers - system (ceramic or steel pipe inside a brick channel) or insulated steel sandwich type.
Almost every man can install a steel chimney like the one in the photo in a house with his own hands if he takes a responsible approach and follows the above recommendations. A preliminary consultation with a specialist is guaranteed to protect you from dangerous mistakes.
Video: Types of chimneys
The main task when installing heating devices operating on the principle of combustion of solid or liquid fuel is the arrangement of the chimney. It is the hood that ensures the combustion process itself, saturating the combustible mixture with oxygen and creating draft, and also does not allow life-threatening products released during fuel combustion to accumulate in the room.
There are several ways to build a chimney with your own hands. We will consider the most modern of them, namely the installation of a chimney from sandwich pipes through a wall, in this article.
Contents of the article
What is a sandwich pipe?
Sandwich pipe is a constructor made from different elements, which allows you to assemble and install a chimney of any complexity and design with your own hands without any extra effort. Each such element has expansions and contractions with different sides, What allows you to assemble a reliable sealed structure, inserting one element into another.
The finished product is a double metal structure made of stainless steel with insulation inside. This feature allows you not to waste time, effort and money on solving additional hydro and water issues.
Chimney elements made from sandwich pipes
A chimney made from sandwich pipes, like any other chimney, has enough complex design When installing it through a wall or roof, you need to take into account the need for bends and turns, connection to the boiler, and the presence of a condensate cup. That is why manufacturers make various components for chimneys from sandwich tubes. To assemble a chimney without unnecessary problems, you only need to draw a plan and take all the necessary measurements of lengths, angles of bends and turns.
After this you will need to purchase:
- Products of required sizes.
- Tees designed for connection from the boiler to the condensate sump and the main chimney.
- The elbows help to bend the chimney. They are produced with bend angles of 15, 30, 45 and 90 degrees.
- Glass for collecting condensate.
- Elements with improved thermal and waterproofing for the passage of a roof, ceiling, or wall.
- Inspection elements with doors for .
- The mouth is the upper end of the chimney.
- The support console is an element necessary for installing a chimney.
- Wall bracket for attaching the chimney to the wall.
- Heat-resistant sealant and control clamps are also required.
Advantages of chimneys made from sandwich pipes
The method of arranging chimneys using metal sandwich pipes appeared on construction market quite recently, but immediately gained wide recognition and popularity among developers. This is due, first of all, to the reliability of the design and ease of installation.
The sandwich pipe protects the chimney channel from external temperature factors. Thanks to this feature, the following advantages of this design can be identified:
- this type of chimney is perfectly compatible with any boilers and stoves operating on liquid or solid fuel;
- made of resistant to absorption various substances, corrosion and destruction;
- thanks to the perfectly smooth inner surface, soot does not settle on the walls of the chimney, which makes it much rarer than any other similar design;
- the formation and settling of condensate is minimized;
- by equalizing the internal temperature of the smoke channel, constant draft necessary for high-quality combustion is ensured;
- insulation protects the outer casing from heating. This design does not pose a danger to adjacent ceilings and residents of the house;
- a chimney made of sandwich pipes, without unnecessary complications and costs, can be mounted outside the house, passing through the wall, which avoids the passage of floors and roofs, as well as saving usable space indoors;
- When installing a chimney through a wall or roof, the slotted openings in the building can be made much smaller than when installing any other chimney. In addition, you can purchase and install special pass-through modules yourself;
- a chimney made from sandwich pipes looks aesthetically pleasing and attractive, which means it does not require additional decoration on the facade of the house;
- Thanks to the lightweight, perfectly fitted elements, the installation of such a chimney can be easily done with your own hands. And the presence of various fragments allows you to correctly make all the necessary bends and turns of the chimney.
The main and, perhaps, the only drawback sandwich chimneys, you can call their high cost. But having spent the money once, you will be confident in your safety and the quality of the constructed structure for many years.
Installing a chimney is a very serious task, so you need to approach its solution with maximum responsibility. Don’t forget, performing work on installing a hood “carelessly” can cost the lives of you and your family.
There are certain rules and nuances that you need to know in order to properly install a chimney with your own hands.
What do you need to know before getting started?
- no matter how your chimney goes through a wall or through a roof, its total height cannot be less than 5 meters;
- the length of the horizontal section for chimneys passing through the wall cannot exceed 1 meter. In addition, this section of the chimney must have a slope of 3 degrees to ensure condensate drains in the direction opposite to the heating device;
- the distance from the wall to the outer casing of the chimney must be at least 25 cm. As a rule, the manufacturer himself determines this distance by making a wall bracket with a base of the required length;
- the distance between the brackets on vertical sections should not exceed 2 meters, on horizontal sections - 1 meter. If the building design allows, it is better to install a bracket every 60 cm.
- Particular attention should be paid to the height of the chimney above the ridge. If the distance from the ridge to the chimney is less than 1.5 meters, the pipe should rise 0.5 meters above the ridge; the same height should be maintained in the case of a flat roof. If the distance from the ridge to the chimney is more than 1.5 meters, the height of the pipe rise should correspond to 10 degrees from the horizontal line of the ridge.
- If the roof of the house is made of flammable materials, the chimney must be raised at least 1.2 meters above it. Besides It is necessary to equip a special spark arrestor.
- if there are any extensions on the roof, the pipe must rise highest;
- if the height of the pipe above the roof exceeds 1 meter, it must be equipped and attached to the roof with additional braces;
- When drawing a chimney, try to draw it in such a way that you have to make a minimum number of turns and bends. The installation instructions allow you to do no more than three.
Features of installing a chimney from sandwich pipes (video)
Chimney installation
It is correct to start installing any chimney with your own hands from the heating device.
- first, an adapter is placed on the outlet pipe of the boiler or furnace on a heat-resistant sealant (withstands 1000 - 1500 degrees), and then clamped with a clamp;
- Next, a horizontal chimney element is installed. This section uses a single pipe with a damper to control draft. The first element does not use a sandwich, since high temperatures will quickly deteriorate the insulation and, as a result, will cease to perform its function;
- To pass through the wall, a hole is made in it. If the building is made of flammable material, the distance from the pipe to the edges of the building must be at least 20 cm. The opening is lined with fire-resistant basalt cardboard, then a passage block is inserted into it;
- A sandwich pipe is passed through the hole of the block, which is connected to the adapter of the heating device. The space of the passage block is filled with mineral vasalt wool. From the outside, the structure is closed with a homemade or factory plate. Sealant is used to fill the remaining holes;
- in the place where the pipe passes through the wall, support brackets are installed to which the plate is attached. It is necessary to assemble this structure to ensure the stability of the vertical pipe;
- then a tee with a tap for draining condensate and a hole for connecting a vertical pipe is attached to the horizontal element;
- To ensure the unhindered passage of smoke and gases, as well as to minimize the entry of condensate into the insulation, it is better to assemble the vertical part of the chimney as follows: inner part The upper element of the sandwich pipe is driven inside the lower one, and sealant is applied to the joint. Then the outer part of the upper element is pushed onto the lower one, and then tightened with a clamp. This method allows you to assemble a chimney as quickly and efficiently as possible;
- we install the entire vertical part of the chimney pipe according to the same principle, including elbows for bends if necessary to bypass a window or other obstacles;
- each sandwich pipe link is attached to the wall using a bracket;
- We finish the installation by installing;
- if necessary, put on a special bracket, and then We secure the chimney pipe with guy wires.
It's not that difficult to set up. However, you should not forget about the rules, as well as the features of this work. Remember, there can be no trifles when we're talking about about flammable substances or carbon monoxide. Be careful.
1 General rules for the design and assembly of chimneys
The design and installation of chimneys must be carried out in accordance with current regulations:
SNiP 41-01-2003; VDPO (RULES FOR WORK, REPAIR OF OVEN AND SMOKE CHANNELS); SP 7.13130.2009.
The purpose of the chimney is to remove combustion products and provide normal draft to maintain combustion. The draft level depends on the height of the smoke channel and the diameter of the chimney.
When installing a chimney, the following rules must be observed:
- The height of the chimney from the heating device to the head must be at least 5 m.
- The elevation of the chimney above the ridge/parapet is determined according to the diagram (Fig. 1).
- The elevation of the chimney above closely spaced roofs of neighboring buildings must be at least 1.5 meters.
- If the chimney rises 1.5 meters or more above the roof, it must be additionally secured with braces (Fig. 2).
- In the chimney design, it is recommended to provide plugs with a condensate drain to remove condensate and/or inspection to allow cleaning and maintenance of the smoke channel
- If the roof is made of flammable materials, a spark arrester made of mesh with a cell no larger than 5 x 5 mm should be installed in the chimney.
- When designing and assembling a chimney, it is not allowed to narrow the diameter of the chimney, but it is allowed to widen it. (For example, to assemble a chimney heating stove with a chimney outlet diameter of 115 mm, you cannot use a chimney with a cross section of 110 mm, but you can use a 120 mm chimney using an adapter from 115 mm to 120 mm).
- The length of the horizontal section of the chimney should not be more than 1 meter.
- The joints of the chimney elements should not coincide with the places of the ceiling and roof passages, passages in the wall.
- Bends and tees must be installed so that they do not bear the load from the weight of the chimney elements installed above them.
2 Chimney design and calculations mounting elements
CHIMNEY DIAMETER. The diameter of the chimney must be equal to or greater than the diameter of the outlet of the heating device. To transition from one diameter to another, use the “Adapter” element of the corresponding diameter.
SELECTION OF PIPES TYPE. The use of a regular pipe or an insulated pipe depends on the location of the chimney. Conventional pipes are used only in heated rooms. Insulated pipes can be used in heated and unheated rooms, and outside. The choice between a regular and insulated pipe in heated rooms is made by the consumer, comparing cost, fire safety and comfort during operation. To switch from a regular chimney pipe to an insulated pipe, use the “Transition from non-insulated to insulated” pipe.
SUPPORTING PLATFORM. The choice of chimney design with or without the use of a “Cantilever Bracket” support platform is determined by the design of the heating device and the location of the chimney.
Without a support platform it is possible to use only level vertical chimney resting directly on the heating device. Figure No. 3.
In all other cases, it is necessary to use the “Cantilever Bracket” support platform. Figures 4, 5, 6. The location of the supporting element “Cantilever bracket” should be at least 5 meters along the height of the chimney.
TURNING THE CHIMNEY. To change the direction of the chimney, use a “bend or outlet insulated at 45 or 90 degrees”
CONDENSATE COLLECTION AND CHIMNEY CLEANING. To collect condensate from the chimney and clean the chimney, use a “Tee or tee insulated at 45 or 90 degrees” together with the element “Plug with condensate drain” or “Blind plug”.
PASSAGE THROUGH THE CEILING. If the chimney passes through the ceiling, it is necessary to use the “Insulated passage through the ceiling” element. Which should be 70 mm greater than the thickness of the ceiling.
IMPORTANT
- In some heat-generating devices (furnaces, boilers) there may be elevated temperature waste gases. This will require additional insulation of building structures and individual design of the ceiling passage assembly to ensure fire safety. During the operation of the chimney, it is necessary to control the temperature on the outer surface of the “Insulated passage through the ceiling” element and, if necessary, replenish the insulation layer as it shrinks.
- The surface of the chimney heats up during operation. If the chimney passes near building structures made of flammable materials, it should not heat them above 50°C (clause 4.39.8 of GOST R 53321-2009).
PASSAGE THROUGH THE ROOF. If the chimney passes through the roof, then it is necessary to use the element “Passage through the roof” or the element “Rubber seal for the roof”, straight or angular. When installing a chimney through the roof, it is necessary to comply with the current regulations. building codes and fire safety regulations.
COMPLETION OF THE CHIMNEY.
To complete the chimney, standard elements “Umbrella” or “Insulated Umbrella” are used.
IMPORTANT
- For heating installations When operating on gas, the chimney must remain open!
FIXING THE CHIMNEY. The fastening must exclude the possibility of deflection and any displacement of the chimney from the wind or its own weight. To do this, use the “Wall Fastening” element, which is installed at the rate of: 1 fastening for every 2 meters of the chimney.
To count required quantity elements, draw a chimney diagram taking into account all the above rules and recommendations. The number of straight sections of bends and tees is determined by the layout of the chimney and its design. Typical schemes chimney assemblies are shown in Figures 3 to 6.
3 Chimney assembly
- Installation of the chimney starts from the bottom, from the heating or heating device upwards. To be able to regulate the draft, install a damper element in the chimney.
- It is recommended to assemble the chimney elements “by condensate” so that condensate and tar deposits do not escape outside.
- All joints of pipes and other elements (bends, tees, etc.) must be sealed with heat-resistant mastic-sealant, carefully connected to each other to the full depth of the landing socket and fastened with a “Clamp” element in EACH connection.
- After installation, a test fire should be carried out, during which it is necessary to check the tightness of the joints and make sure that adjacent structures made of combustible materials are not exposed to high temperatures and do not heat up.
When using the chimney for the first time, an odor and light smoke may appear as a result of the evaporation of oil residues from the metal surface and the crystallization of sealing materials.
When a stainless steel chimney, including a double-walled one, is heated, tarnished colors may appear on its surface, which is not a defect. The chimney needs maintenance. The chimney should be cleaned regularly, at least 2 times per heating season.
The chimney is an important part heating devices, operating on gas, solid or liquid fuel. In fireplaces, stoves, baths and boilers, it is important to maintain a certain level of draft in order to clean the air from combustion products. The correct choice of chimney pipe is the basis for the safe operation of the heating device. Errors in chimney construction can lead to life-threatening situations.
Chimney pipes are made of metal, ceramics and brick. Metal pipes are currently in greatest demand. Of all the varieties of this material, it is recommended to choose steel. Steel pipes for chimneys are coated with special solutions that make the material resistant to all adverse effects of the internal environment of the chimney.
When choosing a pipe, it is necessary to take into account the parameters of the heating devices and the fuel used. The material from which the pipes are made must withstand high temperature, what fuel can create.
When using some types of heating devices, chemically active substances are found among the under-oxidized combustion products. They can damage a chimney that is not sufficiently resistant to chemicals. Some unburned particles can ignite, creating sparks. Therefore, the material from which the pipe is made must be fireproof.
This is interesting! When choosing a pipe, you need to pay attention to the melting point of the material from which it is made. The melting point of steel exceeds 1000 0C - the highest possible indicator encountered when operating heating appliances powered by coal.
The advantages of steel pipes are:
- Easy to install. Steel pipes do not require the installation of a special foundation; they do not require complex engineering solutions or special installation tools. You can install them yourself without preliminary preparation. Due to the plasticity of the material, complex technical structures can be created.
- Light weight. They are easy to transport, you can lift and move them yourself without a team of workers, which also simplifies installation.
- Resistance to high temperatures. Steel products are suitable for appliances operating on any fuel. They do not melt at maximum temperature loads.
- Chemical inertness. Steel does not interact with chemical reagents that can form as under-oxidized combustion products. These substances are not capable of destroying it.
- Corrosion resistance. This advantage applies to pipes that have a special coating and stainless steel. The material itself quickly corrodes. It is worth considering that in addition to the internal environment, the chimney pipe is affected by external unfavorable factors, for example, precipitation. Preference should be given to coated pipes.
- Smooth inner walls. Combustion products settle on the rough surface, turning into soot, which gradually reduces the clearance. This reduces the draft in the chimney. Steel is completely smooth, the risk of soot settling on their surface is minimal.
