Overview of modern pyrolysis heating boilers: what are these "animals" and how to choose a decent option? The best pyrolysis boiler for long burning - we make a choice Pyrolysis boiler for gas.

Years go by, science and technology are moving forward, and solid fuels are still in demand. Burning wood in a traditional stove or in a potbelly stove is not very efficient, but pyrolysis heating boilers have changed the situation - the units are distinguished by high efficiency and relatively simple operation.

Agree, these are quite significant arguments in the arrangement of autonomous heating. If you are looking for an efficient boiler for your home, then you should take a closer look at pyrolysis boilers.

We will tell you how long-burning units are arranged and work, what are their technical and operational features, and we will also give an overview of the most rated models of domestic and foreign manufacturers.

Firewood is perhaps the very first fuel in human history. Almost everyone knows how quickly they burn out in the open air, and that there is not much heat released. But the situation changes dramatically if other conditions for the combustion process are created.

The so-called pyrolysis combustion takes place in closed chambers. Firewood or other solid fuels of a similar type are loaded there: pellets, sawdust, wood production waste, etc.

The fuel is ignited and then the amount of air entering the chamber is reduced.

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Moreover, it will be necessary to load fuel into the device to the maximum, reducing the load leads to increased formation of ash and soot, and also negatively affects the operation of the unit as a whole.

Upper combustion boilers

One of the options for a pyrolysis device is an upper combustion boiler. The principle of operation of these two units is very similar.

In the same way, a large amount of low-moisture solid fuel is loaded into the furnace, air is forced in and the fuel is smoldered with a reduced amount of oxygen. The valve that regulates the flow of oxygen is installed in the desired position.

But long-burning boilers have neither an ash pan nor a grate. The bottom is a blank metal plate. Such boilers are designed so that the wood burns completely, and the small amount of ash remaining in the furnace is blown out with air.

Such devices are characterized by high efficiency and also operate at temperatures above 1000°C.

The main feature of such devices is that they really provide a long service life when fully loaded. The fuel chamber in such devices is usually made in the form of a cylinder.

Fuel is loaded into it from above, while from above, in the center, the air necessary for combustion is injected.

In top burning boilers, the air injection device is a movable element that falls down as the firewood burns out

Thus, a slow smoldering of the upper layer of fuel is carried out. The fuel gradually burns out, its level in the furnace decreases. At the same time, the position of the device for supplying air to the furnace also changes, this element in such models is movable and it practically lies on the top layer of firewood.

The second stage of combustion is carried out in the upper part of the furnace, which is separated from the lower compartment by a thick metal disk. Hot pyrolysis gases, formed as a result of the combustion of fuel below, expand and move upward.

Here they mix with air and burn, additionally transferring a substantial portion of thermal energy to the heat exchanger.

The beam holding the disk, which divides the combustion chamber into two parts, like this disk itself, is constantly under the influence of high temperature during the operation of the upper combustion boiler. Over time, these elements burn out, they will have to be replaced periodically.

A draft regulator is usually installed at the outlet of the second part of the fuel chamber. This is an automatic device that determines the temperature of the coolant and, depending on the data obtained, regulates the intensity of the movement of combustible gas. It protects the device from possible overheating.

It should be noted that the external heat exchanger in such boilers reacts to a change in the rate of circulation of the liquid in the heat exchanger, i.e. to temperature fluctuations. A layer of condensate immediately forms on the surface of the device, which causes corrosion, especially when it comes to steel boilers.

It is preferable to take a device made of cast iron, which resists such an effect much better.

Although the fuel in long-burning pyrolysis boilers should burn without residue, in practice this is not always the case. Sometimes the ash sinters, forming particles that are difficult to remove with a stream of air.

If a large amount of such residues accumulate in the furnace, a noticeable decrease in the heat output of the unit can be observed. Therefore, the upper combustion boiler should be periodically cleaned.

A feature of devices of this type is that, as the fuel burns, it can be loaded without waiting for the entire fuel load to burn out. This is convenient when you need to get rid of combustible household waste.

There are also varieties of top-burning boilers that operate not only on wood fuel, but also on coal. There are no complex automatic control units in pyrolysis boilers of this type, so serious breakdowns are extremely rare.

The design of the upper combustion boiler allows you to load the furnace only partially, if necessary. However, in this case, it may not be easy to ignite the top layer of fuel. The fuel itself must be dried, firewood from an open woodpile is not suitable for such a boiler.

Coarse fraction fuel should also not be used for this type of equipment, i.e. firewood will have to be chopped into small pieces.

Features of the operation of gas-generating boilers

The efficiency of the pyrolysis boiler largely depends on the type and quality of the fuel. Technically, not only wood, but also coal, and even peat can be loaded into the furnace; most modern boiler models are designed to use several types of fuel.

Wood burns in about 5-6 hours, depending on the type. The harder the wood, the longer it burns.

It will take about ten hours to burn black coal, and the same amount of brown coal will smolder for eight hours. In practice, pyrolysis technology demonstrates the highest heat transfer when loaded with dry wood. Firewood is considered optimal with a moisture content of no more than 20%, and a length of about 45-65 cm.

If access to such fuel is not available, coal or other organic fuels can be used: special and wood pellets, wood waste, peat, materials with cellulose, etc.

Before using the boiler, you should carefully study the recommendations of the manufacturer of the device regarding fuel.

In pyrolysis combustion boilers, the air flow is regulated by conventional mechanical valves. The absence of complex electronics provides high fault tolerance of the device

Too wet fuel in such devices is unacceptable. When it is burned in the furnace, additional water vapor is formed, which contributes to the formation of by-products such as tar and soot.

The walls of the boiler become dirty, the heat transfer decreases, over time the boiler may even stop working, die out.

If you use wood with too high humidity for the pyrolysis combustion boiler, conditions will arise inside the device for the formation of tar, which will impair the heat transfer of the device and may lead to breakdowns.

If dry fuel is placed in the furnace and the boiler is set up correctly, the pyrolysis gas obtained as a result of the operation of the device will produce a yellow-white flame. Such combustion is accompanied by a negligible release of by-products of combustion of the fuel.

If the color of the flame is colored differently, it makes sense to check the quality of the fuel, as well as the settings of the device.

Pyrolysis gases mixed with air burn with an even yellow-white flame. If the color of the flame has changed, it may be necessary to check the boiler settings or fuel quality.

Unlike conventional solid fuel devices, before loading firewood into solid fuel pyrolysis boilers, the firebox should be heated.

To do this, perform the following steps:

1. Fine dry kindling (paper, wood chips, etc.) is loaded onto the bottom of the furnace.
2. It is set on fire with a torch made of similar materials.
3. Close the combustion chamber door.
4. The loading chamber door is left slightly ajar.
5. Add portions of kindling as it burns.
6. The process is repeated until a layer of glowing coals is formed at the bottom.

By this time, the furnace is already warming up to about 500-800°C, creating conditions for loading the main fuel. Do not use gasoline, kerosene or any other similar liquid substances to light the kindling. Before warming up the furnace of a long-burning boiler, you should make sure that the device is ready for operation.

A characteristic feature of pyrolysis combustion boilers is a small amount of ash and ash, which facilitates the process of cleaning the device and its maintenance.

To do this, check the presence of traction, the tightness of the doors, the serviceability of the locking mechanisms and control equipment, the presence, etc.

Then you should turn on the thermostat to make sure that the device is receiving voltage. After that, the direct draft gate is opened and the boiler is ventilated for 5-10 minutes.

Overview of popular models

It should be understood that any pyrolysis boiler is a fairly heavy unit that is not designed to be hung on a wall. Such devices can be used both for heating a small house and for spacious cottages. Like other heating units, they differ in power.

When choosing a pyrolysis combustion boiler, one should be guided by such indicators as the thermal power of the device, the dimensions of the loading chamber, the presence of a second circuit, etc.

Buyers are usually guided by this indicator.

Among the popular models of such equipment should be mentioned:

• Atmos(Ukraine) - are represented by devices that can work on wood and coal, the power varies from 14 to 75 kilowatts.
• Attack(Slovakia) - able to cope with the heating of areas up to 950 square meters. m, some models are able to continue working even during power outages.
• Bosch(Germany) - high-quality products of a well-known brand, power varies between 21-38 kilowatts.
• Buderus(Germany) represented by rulers Elektromet And Logano, the first is well known in Europe as a classic version of the pyrolysis boiler, the second is more modern versions designed for private homes.
• Gefest(Ukraine) - high-power devices with efficiency up to 95%.
• KT-2E(Russia) is specially designed for large residential premises, the power of the unit is 95 kilowatts.
• Opop(Czech Republic) - relatively inexpensive boilers, reliable and durable, power 25-45 kilowatts.
• Stropuva(made in Lithuania or Ukraine) with a power of seven kilowatts or more are quite suitable for a small house, but more powerful devices are also presented in the model range.
• Viessmann(Germany) - an ideal choice for private households, power starts from 12 kilowatts, the use of modern technologies saves fuel.
• "Buran"(Ukraine) with a capacity of up to 40 kilowatts is another popular option for owners of large cottages.
• "Logics"(Poland) high-power devices of 20 kilowatts easily heat rooms up to 2 thousand square meters. m, it is rather a boiler for industrial needs: heating workshops, offices, greenhouses, etc.

When choosing a pyrolysis boiler for a private house, you should pay attention to models with two circuits in order not only to heat the home, but also to provide it with autonomous hot water supply.

Pyrolysis boilers are not cheap, but they fully justify the funds invested in their purchase. With proper installation and maintenance, such devices will provide the house with stable and inexpensive heat.

Are you looking for a pyrolysis boiler for heating your home? Or do you have experience with these units? Please leave comments on the article and share your impressions about the use of pyrolysis boilers. The feedback form is located in the bottom block.

Economical and efficient heating is the dream of any homeowner. Happy are those who have the opportunity to connect gas boilers, the rest have to choose between solid fuel boilers and electric ones. Solid fuels are good because heating is relatively inexpensive. Their disadvantage is that they need a constant presence in order to add fuel. But recent developments - pyrolysis-type long-burning boilers - have become more convenient in this regard.

On one tab of fuel, the system can be heated from 8 to 24 hours (depending on the fuel and ambient temperature). In the interval between laying firewood, it doubles, and you can check it in general once a month - such fuel can be supplied automatically as needed.

They have shortcomings. Not without it. Two main ones: the equipment is expensive and very often volatile (requires a guaranteed power supply). The price pays off during operation: on one tab of firewood, the house warms up twice as long, and on the tab - generally up to a day. In addition, there are boilers that burn everything: even construction debris and old tires. Anything that can burn.

Operating principle

How is it possible that so much energy can be obtained from such a small amount of fuel? The thing is that most of the heat in conventional boilers (they are called direct combustion boilers) literally "flies" into the pipe.

If you heat with wood or coal, you know that it is impossible to touch the pipe - the temperature there and 300 o C can be 400 o C. And in some cases (in baths, for example) even higher.

In pyrolysis stakes, air leaves the furnace with a temperature of 130-160 o C. This is achieved due to the fact that not only the energy released by firewood is used, but the gas that they emit during smoldering is also burned (a special mode is created for this).

The work is based on the fact that carbon-containing fuel (coal, firewood, pellets) when burned with a lack of oxygen, decomposes into a large amount of gases and combustible substances. Due to the fact that in the process of smoldering from wood or other carbon-containing fuel, a large amount of combustible gases is released, such devices are also called gas-generating boilers. For example, wood as a result of pyrolysis is converted into:

• solid residue - which itself is a high-calorie fuel;
• methyl alcohol;
• acetone;
• various resins;
• acetic acid.

All these substances burn and release a large amount of energy. Pyrolysis boilers therefore have two chambers:

• Fuel is placed in the combustion chamber and ignited to achieve the desired temperature.
• The gases released during the combustion of the fuel are discharged into the pyrolysis chamber (afterburner). They already have a high temperature, mix with the air injected there, and ignite.

Air is separately supplied to both chambers, the intensity of combustion and the power of the boiler at this stage are regulated by its quantity. This is the only fuel combustion technology that allows you to automate the combustion of wood or coal.

Advantages and disadvantages

Emission of gases during combustion in conditions of lack of oxygen is very active. Therefore, for the efficient operation of such equipment, automation is important, which will control the process: limit the oxygen supply after the firewood has flared up and regulate the process in both chambers. This is the main drawback of the stake: it needs guaranteed power to work (for the automation to work).

There is another positive point: pyrolysis gases interact with carbon during combustion. As a result of these reactions at the outlet of the boiler, the smoke consists mainly of carbon dioxide and water vapor with a small amount of other impurities. If firewood is used, CO emissions into the atmosphere are three times less than when using traditional technology. When working on coal, the situation is even more rosy - there is a five-fold reduction in emissions.

The afterburning of gases and the microparticles contained in it is also good because there is practically nothing to be deposited on the walls of the chimney: little soot is formed. And one more bonus: there is little ash left. Little ash and soot - less cleaning required. It's nice too.

Direct combustion boilers have an efficiency of about 60-65%. Pyrolysis - 80-90%. This is a tangible difference.

But the benefits aren't over yet. It is possible to regulate the power of a conventional boiler rather conditionally. All possibilities - open / close the doors, blowers and dampers. Moreover, you need to do this with your hands and rely on experience and intuition. The pyrolysis process can be adjusted over a wide range: you can leave 30% of the power, or you can “overclock” it to 100%. And the process is regulated by automation, which focuses on the specified parameters. Result: 40% fuel savings.

Structurally, cola can be made in different ways: in some models, the afterburner is located under the primary, in some - on top. There are models in which it is located behind the primary firebox. In some units, air is supplied not from below the firewood through the grate, but is “blown in” from above, slowing down the combustion process. They are all variations of the same technology. But they also have their pros and cons. Let's consider some of them in more detail.

Blago Features

These boilers were designed by engineer Yuri Blagodarov. Their main advantage is that there are non-volatile models. They do not use artificial air injection, the boiler runs on natural draft.

The thoughtful arrangement of fuel bunkers, afterburners and the use of a catalyst (bath stone) made it possible to decompose not only simple carbons, but also complex ones. Due to this, the number of fuel types has expanded significantly, and the efficiency of its distillation has also increased.

Another distinguishing feature of these boilers is the ability to use raw firewood without losing power. Blago boilers of industrial capacities can operate on wood with 55% humidity, low-power units successfully cope with 35% humidity.

The design is constantly being improved. Recently, the production of equipment for burning used tires has been launched, there is specialized equipment that runs on coal.

Ordinary long-burning pyrolysis boilers "Blago" use firewood, sawdust, wood chips, trimmings and their mixture with coal chips. When using firewood, they, in principle, can not be chopped - whole small logs burn well.

As a result, boilers are truly omnivorous: they run on old tires, rubber, leather, polyethylene, not to mention traditional types of solid fuel.

Large pyrolysis boilers "Blago" have several fuel chambers (at least two). If necessary (small frosts on the street), you can put fuel in only one. The efficiency (81-92%) of the boiler does not change from this, only the power becomes lower. For example, a 50kW boiler can be used for 12kW. At the same time, for the period of acceleration of the system, it will produce 25 kW, and the rest of the time - 12-15 kW. There are small models (from 15 kW) with one fuel loading chamber.

Blago long-burning pyrolysis boilers with power from 12 kW to 58 kW are produced. More powerful installations are made to order with the coordination of input and output parameters. For units from 1 MW, an automatic fuel supply line can be developed (this is the data from the report of the author of the project).

What does the manufacturer guarantee besides “omnivorousness”? Firstly, a smaller amount of fuel required - it is needed by 20-30% compared to other boilers of the same operating principle. Secondly, long-term burning - the laying of fuel occurs every 12-18 hours. Thirdly, high safety: the loading door and the furnace valve are combined, which prevents accidental ignition during fuel loading, automatic adjustment of the plug is provided to prevent the release of gases in case of violation of the installation rules. Fourth, ease of use: automated control, no smoke when loading fuel, automatic cleaning of fuel channels.

Now about the shortcomings that are pointed out on the forums:

• The equipment is expensive.

Yes, it's not cheap. But everyone is sold a package of documentation for self-production.

Model	Power	Area	Maximum system volume	Dimensions, mm	Fuel	coolant	Price
BLAGO-TT 15	15 kW	150 m2	0.83 m 3	1200*530*970	Firewood, wood waste		48 tr.
BLAGO-TT 20	20 kW	200 m2	0.60 m 3	1200*530*1140	Firewood, wood waste	Water, non-freezing liquid for heating systems	60 tr.
BLAGO-TT 20	25 kW	250 m2	0.75 m 3	1540*725*950	Firewood, wood waste	Water, non-freezing liquid for heating systems	75 tr.
BLAGO-TT 30	30 kW	300 m2	0.84 m 3	1540*725*110	Firewood, wood waste	Water, non-freezing liquid for heating systems	90 tr.
BLAGO-T2 T-BH-40	40 kW	400 m2	120 l	2300*1100*1100	Firewood, wood waste	Water, non-freezing liquid for heating systems	120 tr.
BLAGO-T2 T-BH-50	50 kW	500 m2	168 l	2300*1100*1300	Firewood, wood waste	Water, non-freezing liquid for heating systems	150t.r.
BLAGO-T2T-BC-40 (built-in heat exchanger)	40 kW	400 m2		1805*1100*1100	Firewood, wood waste	Water, non-freezing liquid for heating systems	120t.r.
BLAGO-T2T-BC-48(built-in heat exchanger)	48 kW	480 m2		1805*1100*1300	Firewood, wood waste	Water, non-freezing liquid for heating systems	144t.r.

• As a disadvantage indicate the rapid cooling of the boiler with a late laying of fuel.
• The boiler is difficult to pyrolysis.

But the last two shortcomings are the result of little experience with this boiler and the wrong position when kindling the ash pan. Some consumers do not like the excessive removal of the heat exchanger walls, which makes it difficult to load fuel (TTS and TTU models).

Czech Atmos

The Czech company Atmos (Atmos) manufactures more than 200 models of heating boilers that burn wood, diesel fuel, briquettes. There is equipment that runs on several types of fuel, gas boilers are made to order.

Atmos long-burning pyrolysis boilers are produced both for heating small rooms with a capacity of 15 kW (90-180 m2), and for industrial premises up to 1000 m2 and more.

They consist of two chambers located one above the other: at the top is a fuel chamber, at the bottom is a chamber for afterburning gases. The chambers (one or both) can have a ceramic finish, which increases the efficiency of heat use - it does not dissipate through the walls, but goes to heat the coolant. The fuel bunker is large, even fairly large logs can be laid there. This reduces power, but increases the duration of burning (can be used in warm weather when high temperature in the system is not needed).

Atmos produces pyrolysis boilers for different fuels:

• on wood - marked Atmos DC;
• coal-wood - Atmos C and Atmos AC;
• pyrolysis boilers Atmos DC 24 RS, DC 30 RS;
• pellet boilers Atmos

The marking of the boilers also contains the prefixes GS, GSE and S. The first two types have an all-ceramic finish of both furnaces, due to which the efficiency becomes higher, and the percentage of carbon dioxide emissions into the atmosphere is much lower. Despite the fact that the cost of such devices is almost 50% higher, practically only equipment of this type is sold in Europe. In our country, the lion's share of sales falls on less efficient, but cheaper boilers marked S without ceramic coating of furnaces.

Atmos long burning pyrolysis boilers: prices and specifications (click on the picture to enlarge it)

German Bosch quality

Boilers from the German company Bosch can be used as the main or backup heating equipment. They are distinguished by a wide possibility of power regulation (by changing the operating mode of the smoke exhauster, you change the power of the thermal unit). The efficiency of the boilers is 78-85%, the volume of water in the system is 76-124 liters.

Technical characteristics of the pyrolysis boiler for long burning Bosch Solid 5000 W-2

Boilers work only on wood with a moisture content of up to 25%; briquettes made of wood materials can be used. The design of e is similar to Czech counterparts: on top there is a bunker for loading fuel and its gasification, and on the bottom there is a gas afterburner chamber. Between them is a ceramic burner. The cost of such boilers is from 2000 euros.

Another video material that explains the principle of operation of solid fuel pyrolysis boilers

Modern solid fuel boilers are increasingly using the pyrolysis process in their work. The principle of operation of heating equipment, based on the ability of wood, during combustion, to release a large amount of carbon dioxide.

The long-burning pyrolysis boiler accumulates heat obtained in the process of burning fuel from wood or its waste, and afterburning the released gas.

How do pyrolysis boilers work with a long burning time

A solid fuel pyrolysis boiler of long burning differs from classical heat generators in several structural differences and internal structure. The changes affected the work processes, the combustion chamber and the smoke channel.

As a result of modifications and design solutions, the following advantages and characteristics have been achieved:

• Operating time from one bookmark of fuel, from 8 to 120 hours, depending on the model and fuel quality.
• Reduced wood consumption - compared to the classic version of the boiler, fuel costs have decreased by 15-20%.
• Accuracy of adjustment - the principle of operation used and the automation used, provide precise adjustment of the intensity of heating of the coolant, with an error of not more than 1 ° C.
• High heat transfer - the efficiency of pyrolysis models varies, depending on the quality of the fuel and the manufacturer, within 80-92%.

What is the fuel pyrolysis process

The principle of operation of a long-burning pyrolysis boiler is based on natural physical processes and wood properties:

• Wood, when heated, begins to release carbon dioxide.
• After mixing with oxygen, a combustible gas-air mixture of CO is obtained, which under normal conditions simply goes into the chimney.
• Steel solid fuel pyrolysis boilers for long burning with a water circuit, equipped with a special afterburner. The produced gas is sent to an additional furnace, where it burns at a temperature of 600-800°C.

The main task of pyrolysis heating equipment is to create the necessary conditions for the maximum production of carbon dioxide: high temperature and limited air access.

Design features of boilers with pyrolysis

The heating pyrolysis boiler of long burning with a water circuit differs from the classic models of equipment in several features:

• Type of loading - all boilers are equipped with an enlarged furnace with vertical or horizontal loading. The large capacity of the combustion chamber helps to increase the time of the pyrolysis process. About 20 minutes after kindling, the boilers operate normally. After heating to a temperature of 600°C, pyrolysis combustion begins.
• The device of a fire chamber - in a design two combustion chambers are provided. The main fire chamber, has convection openings, for receipt and uniform distribution of air. The afterburner is lined with fireclay to maintain a high temperature.
• The design of the heat exchanger - household pyrolysis boilers for long burning on solid fuels, use the heat generated during combustion as efficiently as possible. As such, combustion, in the full sense of the word, does not occur, the wood smolders with a limited supply of air and high temperature. Flue gases are directed to the broken flue duct of the boiler. The heat exchanger surrounds two combustion chambers and a channel. Progressive technologies allow to accumulate most of the heat coming from heated smoke.
• Coolant heating - models with a long burning time heat the coolant in a flow way. Boilers have one or two circuits. The first heating circuit is intended for connection to the heating system. Through the second, water for hot water is heated. The technical characteristics of the boiler, in particular performance, largely depend on the presence of a hot water coil. In double-circuit units, the power is less.
• Air supply control – boilers are supplied with natural or forced air supply. Non-volatile models are controlled by means of mechanical ones connected to the ash pan door. The installation of automation connected to smoke exhausters and blowers ensures precise combustion control.

Dependence on electricity is solved by installing an uninterruptible power supply. The voltage consumption in the boilers is 150-300 W/h.

Is it possible to increase the burning time of the pyrolysis boiler

The duration of the pyrolysis boiler depends on several factors, given which it is possible to extend the operating time from one tab:

Factory-made briquettes, wood chips and sawdust have a moisture content of 8-18%, which is the optimal moisture content for the pyrolysis process.

Which pyrolysis boiler is better

According to a statistical report, regarding sales of pyrolysis models of heating equipment, boilers from European manufacturers remain the most in demand. The popularity is not affected even by the high cost of models, which is 2-3 times higher than for domestic counterparts.

A short review of pyrolysis heating boilers for long-term combustion on solid fuel helps to identify models that are in demand by domestic consumers:

• German boilers - German Buderus, Viessmann, HDG take the lead in popularity. The range includes both fully autonomous boilers and equipment with manual control.
• Czech boilers - Wattek offers non-volatile heating equipment for domestic use. The products became available to domestic consumers relatively recently, but are already popular.
• Russian equipment - pyrolysis boilers are represented by the brands Bourgeois K, Trayan, Geyser, Termofor, Divo. The difference between the equipment is the ability to work on wood with a high moisture content. Most models are universal.
• Bulgarian boilers - not widely used. The Russian buyer was able to evaluate Burnit boilers from Sunsystem. There are no other competitive models made in Bulgaria.
• Joint production - several Russian manufacturers have established joint production with European manufacturers. One of the most popular models is the Lavoro boilers, manufactured by the Italian-Russian concern.

How much do pyrolysis boilers cost

To select a pyrolysis boiler, it is necessary to take into account not only the technical characteristics and performance, but also its cost and the cost of further maintenance.

Boilers of small power, up to 20 kW, depending on the manufacturer, cost from 60 to 350 thousand rubles. The German Buderus and Wiesmann are the most expensive.

Domestic Termofor and Bourgeois-K belong to the middle price category. Czech Watteks are expensive, almost like their German counterparts, which somewhat limits their popularity.

Requirements for the installation site of a pyrolysis boiler

Fire safety requirements for pyrolysis heating equipment are the same as for all other solid fuel boilers. When installing, observe the rules of PB and SP:

• Boilers of high power, over 40 kW, are mounted in a separate room. Installation of equipment with lower productivity is allowed anywhere in the house.
• Before installation, prepare the base. Due to the presence of two combustion chambers, the weight of the boiler reaches several centners. Due to the large mass of the unit, a foundation is required.
• When the chimney passes through the floor slabs and the roof, a special fireproof cut is made.
• The floor and walls are lined with non-combustible finishing materials.

The minimum area of ​​the room used for the boiler room is 9 m². The presence of supply and exhaust ventilation is mandatory.

Opinions and reviews on pyrolysis heating boilers

You can find a variety of owner reviews about long-burning pyrolysis boilers. Moreover, there are directly opposite opinions: from enthusiastic praises to extremely negative statements:

• Harm to human health from the operation of a pyrolysis-type boiler. One of the most serious fears associated with the negative impact of equipment on humans is unfounded. The boiler uses only natural physical laws.
• Efficiency and heat dissipation are greatly exaggerated. To achieve maximum thermal efficiency, it is required to use wood and waste with a maximum moisture content of up to 20%. Incorrect operation leads to a decrease in heat transfer.

The real disadvantages of pyrolysis boilers are the demands on the quality of wood and the high cost of equipment. The remaining negative reviews are mainly related to the actual inability to use boilers.

What is wood pyrolysis

Pyrolysis is the decomposition of a substance under the influence of temperature.
wood pyrolysis is the thermal decomposition of a wood substance.

Under the influence of temperature, wood decomposes into products wood pyrolysis - carbon (charcoal) and volatile hydrocarbons (pyrolysis gas). Wood pyrolysis products are combustible substances. When - we see combustion (oxidation) of wood pyrolysis products. Without preliminary pyrolysis (thermal decomposition), wood will not burn. Preliminary pyrolysis of the wood substance is a prerequisite for the combustion of wood. In any fire and stove, at the tip of a burning match and in a raging forest fire, the same thing always happens - the thermal decomposition (pyrolysis) of the wood substance and the combustion (oxidation) of the wood pyrolysis products are continuously going on. If the wood does not burn, it means that there is no sufficiently strong and effective process of pyrolysis of the wood substance that can support the combustion of wood.

Ignition and burning of wood

If the wood is heated long enough and strongly enough, its thermal decomposition will begin, followed by ignition of the pyrolysis products. The first, sluggish process of wood pyrolysis begins already when it is heated to a temperature of 120°C ... 150°C. Then, as it heats up, thermal decomposition intensifies and becomes noticeable to the naked eye. At a temperature of 250°С...350°С, the wood surface becomes charred and white smoke appears. At this temperature, short-term ignition of pyrolysis products can occur. With further heating of wood to 600 ° C, there will be an indispensable ignition of these very products of thermal decomposition - the formed charcoal and pyrolysis gas. If the ignition zone is not supercooled, the wood will catch fire and burn. You can read more about the process of burning wood in the article "".

What is pyrolysis wood combustion

Basically, any combustion of wood is pyrolysis, since any combustion of wood is preceded by its preliminary - thermal decomposition. The combustion of wood cannot be any other than pyrolysis.

What is a wood burning pyrolysis boiler

Wood pyrolysis boiler - this is a heating equipment that works on wood and organic heating briquettes, according to the principle of (separate) combustion of fuel. Since, with such separate combustion of fuel, pyrolysis gas is released (generated), pyrolysis boilers are often called "gas generating" or "gassing". Specialists can separate these concepts for those cases when it is really important. For the average consumer, there is only one thing to remember:

The main difference between the pyrolysis boiler is the presence of a two-chamber body structure, which provides separate combustion of fuel.

You can read more about pyrolysis boilers in the article.

Fuel for wood pyrolysis boiler

The fuel for the pyrolysis boiler is also fuel briquettes (wood and organic). In a small percentage (no more than 15-25% of the total mass), you can add wood chips, sawdust, shavings, small wood waste and even pellets.

Despite the fact that pellets are 100% wood, they cannot serve as the main fuel for a pyrolysis boiler, due to their fine fraction. The minimum size of pieces of fuel for a pyrolysis boiler is 70-100 mm in diameter, no less.

Fossil energy carriers and products of their processing - gas, oil, coal and coal fuel briquettes, as well as rubber products and plastic-containing substances cannot serve as fuel for a pyrolysis boiler.

The work of a wood pyrolysis boiler (video)

Poryskav on the Web, easily found a good video about the operation of the pyrolysis boiler. The screen clearly shows that firewood (fuel) is loaded into the upper (pyrolysis) chamber. There, the wood smolders and decomposes under the influence of high temperature. This releases flammable pyrolysis gas. Then, already in the lower chamber - this gas burns out like ordinary natural gas. The remains of wood burn out in the upper chamber.

How to choose a wood pyrolysis boiler

Nowadays, wood pyrolysis boilers are not made and sold only by the lazy. It is no wonder. In times of fuel crises, wood heating is a tidbit and a balm for the heart. However, REAL pyrolysis boilers are not “too tough” for every manufacturer and seller. Because this thing is very material-intensive and cumbersome. And since, "in vain to shove a pile of metal and ceramics to distant lands" - no one will, then when buying a pyrolysis boiler, you need to immediately tune in to work with a domestic manufacturer or a well-established dealer network.

It is with them that it will be necessary to agree on the following issues, which are paramount when buying a wood-fired pyrolysis boiler:

Lining of wood fired pyrolysis boiler

The lining is obligatory for a wood pyrolysis boiler.
And the point here is not at all in protecting the metal from burning out.
Metal, just nothing threatens.

But the process of wood pyrolysis itself can suffer from hypothermia. Because, active thermal decomposition of woody substance is possible only at a temperature of at least 600 ... 800ºС. And, if the fuel comes into contact with the steel water-cooled walls of the boiler body (t = 120 ... 250ºС), it will simply go out or burn badly. It turns out that the lining of the pyrolysis boiler protects the combustion zone of fuel (firewood) from hypothermia.

In addition, the lining kit of any pyrolysis boiler contains the most important detail, without which the operation of a pyrolysis heating unit is simply unthinkable - this is a ceramic NOZZLE!

Explanation of the importance of the nozzle
- Absolutely all pyrolysis boilers must have two chambers - a loading chamber (for wood pyrolysis) and a combustion chamber (for burning pyrolysis gases). These two chambers are necessarily connected by a ceramic nozzle, which is the main attribute of the combustion of pyrolysis gases.

The ceramic nozzle of a wood-burning heating pyrolysis unit is its "Achilles' heel". The nozzle of the pyrolysis boiler withstands thermal shocks with an amplitude of almost 600ºС, wears out very quickly, collapses and fails. The service life of the nozzle, a maximum of 3-4 years. After that, it will need to be replaced.

And, if the service life of the boiler body is 15-20 years, and the service life of its lining parts is 3-4 years, then this means only one thing - periodically the lining parts of the pyrolysis heating unit will need to be bought from its manufacturer and changed.

Hence the conclusion - you need to take products from well-known manufacturers who have an established dealer network and there should be no problems with the purchase of spare parts.

Advice
- If you decide to purchase a wood-burning pyrolysis boiler, try to immediately buy a lining kit for it. The seller's answer will be a balm for the heart. Either it (lining, nozzle) is on sale, or it is not. In any case, this will save you from big problems in the future, because the lining of wood-burning pyrolysis boilers is unique in its configuration and you can buy it only from the manufacturer.

Thus, it turns out that pyrolysis boilers are tied to their manufacturer, because only the manufacturer of the pyrolysis boiler can buy its lining

The thickness of the metal body of the wood pyrolysis boiler

Nowadays, the cast-iron boiler body is a rarity. All modern wood-burning boilers have an all-welded steel sheet metal body. When choosing a pyrolysis wood-burning boiler - be interested in the thickness of the metal of its body.

Here, indicative information on the thickness of the metal of the pyrolysis wood-burning boiler body, depending on its power:

Wood Pyrolysis Boiler Weight

A third follows from the first two questions. As soon as it was decided that the pyrolysis heating unit should have thick walls of its body and a thick lining, then its weight should be serious. The way it is. Pyrolysis boilers are a heavy thing. And, if the weight of the wood pyrolysis boiler is less, respectively, the manufacturer saved on metal or product lining.

Good and light wood pyrolysis boilers - do not exist

Here is the approximate weight of pyrolysis boilers depending on their power:

Note. Information taken from the technical department of one of the leading manufacturers of wood pyrolysis boilers.

Wood Pyrolysis Boiler Dimensions

The dimensions of a wood pyrolysis boiler are made up of a combination of the dimensions of the combustion chambers plus the dimensions of the heat exchanger. Must be at least:

Note. Information taken from the technical department of one of the leading manufacturers of wood pyrolysis boilers.

Heated area for wood burning boiler

The most important thing is to choose a wood pyrolysis boiler in size.
There are many tips and tricks here. The simplest and most proven old-fashioned way is to select a heating unit at the rate of 1 kW per 10 m 2 of the heated area. You need to choose with a margin of 10%. Accordingly, a 16kW boiler is needed for 120m 2, a 18kW boiler for 160m 2, and so on ... If the manufacturer did not “fool” with the power indicator of a wood-burning pyrolysis boiler, everything will work.

Small correction for room height
- If the height of the heated room is more than 3m, then for each meter above, you need to add the power of the selected boiler + 1 ... 3%.

What to do after choosing a wood burning boiler

(comic advice from the manufacturer)

After choosing and buying a wood-burning boiler, the question arises - what to do with it now, actually?

Transportation of wood burning pyrolysis boiler
Proper transportation of the wood burning boiler is very important. Best of all, pyrolysis boilers are not transported, but tilted to the installation site. At the same time, one should not forget that the more often the boiler was “hipped” on mother earth, the stronger the lining and the boiler body became. "Shaking", you know, it's the right thing. Naturally, such a heating unit will last longer.
(The ideal option for moving the boiler in space is “off-road dragging”) If, at the same time, the lining is slightly scratched, the door or the automation unit falls off, do not be discouraged. Feel free to call the manufacturer's technical support department and demand replacement of low-quality parts. At the same time, do not forget to cut off (tear off) the temperature sensor, such as it fell off by itself.

Installation and connection of a wood pyrolysis boiler
When installing a wood-fired pyrolysis boiler, feel free to ignore any plumbing rules, SNIPs and, most importantly, common sense! Remember that wood-burning boilers can work even "lying on their side"! Wood fired pyrolysis boilers do not require skilled labor to install and maintain them. It's WOOD. Call the "shabashnikov", "sandalte" the pyrolysis boiler to your heating system and immediately call the manufacturer's technical support service.

Recruitment of personnel for the maintenance of a wood pyrolysis boiler
When recruiting personnel, for the role of an operator of a wood-burning pyrolysis boiler, choose drunks from the gateway. They will certainly be able to chop and stuff firewood into the boiler furnace. And, to squeeze the automation buttons - call one of your friends so that there is a person with a higher education, that means.

Maintenance of a wood burning pyrolysis boiler
Someone invented the maintenance of a wood-fired pyrolysis boiler. Rave. What is there to serve? He stuffed firewood, set it on fire and let it burn. Well, there is some ash and ashes. So they themselves fall out of the boiler when the doors are opened.
Does the manufacturer remind you of the need to open the heat exchanger once a season and clean the surface of the pipes from soot? Nonsense. Why get your hands dirty to clean what you can't see?

Instruction manual, passport and warranty card
Each pyrolysis boiler is accompanied by "Operating Instructions", "Passport" and "Warranty Card". What is it and why is it done?
Explanation:

• Warranty card
  - It can be hung in a frame, there are beautiful seals and signatures
• The passport
  - Well, this is in case the special services become interested in the origin of the boiler. Then you need to put your passport in their nose and send it to hell.
• User manual
  - Oh, it's important! It's just that you don't have to read it.
  In fact, this is paper for the first ignition of the boiler.

Electronic control unit (automatic)
It has only six buttons. This is much less than on a mobile phone. So there won't be any problems. We press the buttons and see what happens. The button "for self-destruction" is not provided by the manufacturer, so nothing threatens the consumer.

The first ignition of a wood pyrolysis boiler!
Song! It is very important, at the first ignition, to attribute all your problems to the manufacturer! At the same time, you need to remember that you need to call the technical support service until you are completely satisfied! And where should they go. That's what they get paid for!

By the way, the marketing department and the technical service of the plant, with great pleasure, read the “Operating Instructions” by phone, which is applied to each pyrolysis boiler. In addition, for a small fee, the same "Operating Instructions" is read in verse and to the accompaniment of a tambourine.

Condensate in the body of a wood pyrolysis boiler
Don't trust anyone. None exist in nature! These are all inventions of the manufacturer. As soon as you see a puddle under your pyrolysis boiler, immediately start calling the manufacturer. And the more often, the better. Let them come and take their holey trough. Then, having talked enough on the phone and taking on faith the statement about condensate, it will be possible to relax a little.

Practice has proven that after about a day or three, and in especially severe cases - just a week later, all owners of pyrolysis boilers adapt to heat the boiler so that condensate formation is reduced to zero. However, at the first ignition, a sea of ​​condensate is guaranteed. In some cases, its amount can reach tens of liters.

Firewood for wood pyrolysis boiler
need raw. Moreover - wet or freshly cut.
Did you read somewhere that pyrolysis boilers allow you to burn firewood with a moisture content of up to 70%? Right. This is the kind of firewood you need to shove into the firebox. And if the firewood is also frozen and with pieces of ice, then this is generally a class. It is this wood that will give the greatest amount of heat during combustion. As for the type of wood, we choose poplar. It is cheaper than oak and gives a lot of fine ash. In addition, it is much more pleasant to look at a huge pile of low-calorie poplar blocks than a pair of high-quality oak logs. Low-calorie food is in vogue these days. Everyone wants to lose weight. Now, both low-calorie yogurts and lard. Therefore, it is also fashionable to harvest low-calorie firewood for the winter. Type - the most squeak, on the topic.

Shovel
As you know, you need to laugh after the word "shovel". You can smile at this place.

Nostalgia for the gas idyll

Oh, it was a good thing - gas heating.
Oh, what a song it was - the mass gasification of the Soviet Union.
And what words were in it - Urengoy-Pomary-Uzhgorod.
The people then accepted the innovation with a bang! and whole streets, cities and villages switched from coal-wood stove heating to gas heating - civilized. ABOUT! Gas boilers and stoves very quickly won the hearts of consumers and firmly entered the household and industrial life. Heating plants have almost completely switched to gas. All new boiler houses were designed and built only for gas. Mankind breathed a sigh of relief and for many years gas became one of the main sources of thermal energy.

Gas heating - an unaffordable luxury

Recently, the situation has changed dramatically.
Natural gas has risen in price. Moreover, the price has risen so much that the unexpectedly coming winter spoils the mood of absolutely everyone who does not live in a hut. Gas wars and gas crises have long become the norm and no longer surprise anyone. Suddenly blocked gas pipelines and highways are the favorite chips of the current government. The irresistible rise in the cost of gas heating has a negative effect on the “fatness” of the wallet, threatening to bring the latter to a state of pronounced dystrophy. The cost of gas heating has increased so much that sometimes it’s easier to turn it off completely and sit in boots than to pay fabulous bills

Gas heating, from a basic necessity, gradually turned into a luxury item

Bah, even the newly-minted post-Soviet bourgeoisie have problems with gas heating. True, for a reason other than financial. Money, just like the bourgeoisie - in bulk. But gas can only be used if there are gas pipelines. And no one has been building them for a long time. There is no mass gasification - and that's it. So the gentlemen sit, sir, with their own money - and in unheated country houses. Such are the things.

There is only one way out - to find another source of thermal energy and say "good bye" to gas as fuel

Wood heating - as an option

A lot has been said about alternative energy carriers, and even more has been written. As an option - wood heating. Even prosperous and well-fed Europe does not disdain wood-burning heating. Why be ashamed of us orphans. Fortunately, scientific and technological progress and gentlemen, manufacturers have turned their clear eyes to this problem and “riveted” such an incredible number of modifications of wood-burning boilers that their eyes run wide. Yes, now only the lazy do not make wood-burning boilers. This is what confuses the inexperienced consumer. In this article, the author ventured to summarize his experience in working with wood-fired pyrolysis boilers and give some advice on their selection and selection. Some of the tips are presented in a comic form, which does not detract from their informational value.

Alternative Heating:

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(related news)

Heating houses with solid fuel boilers is quite a common occurrence in small towns where there is still no gas. In most cases, the most common firewood or fuel briquettes are used as fuel.

The disadvantage of such boilers is that they are forced to make many approaches to throw up more and more new portions of fuel. Long-burning pyrolysis boilers are deprived not only of this drawback, but also of some others - we will talk about this as part of our review.

Features of pyrolysis boilers

Traditional wood-fired boilers are annoying because they require constant supervision. That is, every 2-3 hours they need to put more and more portions of fuel in them, otherwise the pipes in the house will become cold. It is especially difficult at night, when instead of a restful sleep, households get a headache in the form of a cooling heating. On the one hand, sleeping in a cool place is good for health. On the other hand, meeting the morning, desperately chattering your teeth, is not very pleasant.

Classic boilers for home heating have another important drawback - low efficiency. The fuel in them burns very quickly, most of the heat simply escapes into the atmosphere. Together with it, combustion products containing combustible gases fly into the air. They can be used to obtain additional portions of heat - this is what happens in pyrolysis boilers for long-term combustion.

As you already understood, solid fuel pyrolysis heating boilers are devoid of both of the above disadvantages.. They are endowed with capacious fireboxes, burning solid fuel according to a slightly different principle. Here are their main features:

The principle of operation of a solid fuel pyrolysis boiler is very simple. Although this figure does not cover all the nuances, it conveys the essence of the technology in full.

• Large volume of the furnace - up to several tens of liters. Due to this, the frequency of approaches for laying fuel is reduced several times;
• The pyrolysis principle of combustion - allows you to get much more thermal energy from the same amount of firewood;
• Quite large - in fact, there are two fireboxes. In one, firewood slowly burns out, and in the second, the products of combustion released from the wood are burned;
• Low combustion temperature - reduces the thermal load on the metal.

Long-burning pyrolysis boilers are somewhat more complex than their traditional counterparts, but they provide significant fuel savings.

It should be understood that due to the complex design, often containing elements of automation, pyrolysis boilers are characterized by a high price. Therefore, the initial cost of their purchase may seem large. But in the future they will definitely justify themselves.

Operating principle

Now we will try to understand how a long-burning pyrolysis boiler is arranged and how it works. The principle of operation is very simple and complex at the same time. Pyrolysis is described in the school physics course - being heated in a confined space, wood emits combustible gases that can be ignited and heat generated. In fact, there is no direct combustion of wood in such an experiment.

In long-burning pyrolysis boilers, firewood still burns, but with limited air supply. We can say that this is a slow smoldering. Having flared up, the tree begins to emit combustible gases that burn in the afterburner. In total, we get two sources of heat - these are burning wood and burning wood gas. The effect of such staged combustion is felt in the form of fuel savings of up to 40%.

Wood gas in pyrolysis boilers for long-term combustion is formed as a result of slow smoldering of fuel. At the same time, the equipment heats the air, which, together with wood gas, is fed into the afterburner. There, the mixture ignites and burns with the formation of a large amount of heat. At the same time, the amount of harmful emissions, in comparison with traditional boilers, is extremely small.

Thus, a pyrolysis boiler is a direct fuel saving, since more heat can be released from the same portion of firewood. Instead of 10 cubic meters of firewood for one winter period, only 6-7 cubic meters can be used. At the same time, users will not need to put all new portions of firewood into the insatiable firebox every 2-3 hours.

Long-burning pyrolysis boilers are available in several modifications:

Despite the low burning rate of the fuel, the emitted porylysis gases are able to pump the flame to a similar bright white-yellow color.

• Non-volatile - they operate on natural traction and are mechanically controlled;
• Volatile - here the pyrolysis proceeds using forced draft. This increases the efficiency of combustion;
• With a different arrangement of the afterburning chamber - it can be located above the combustion chamber or below it. Also on sale there are modifications with a sequential arrangement of cameras.

There are many modifications, but in general, the device and the principle of operation are almost the same.

Long-burning volatile pyrolysis boilers are good because they often have automation that can control the power of the equipment and the intensity of combustion, focusing on the temperature of the coolant or the temperature in the rooms.

Long-term combustion in pyrolysis boilers is ensured by two factors at once. The first factor is the low burning/smoldering rate of wood. The second factor is the large volume of the combustion chamber. For example, pyrolysis boilers with a furnace volume of 50 liters and even more are on sale. It is not surprising that the frequency of approaches for loading fuel is reduced to 1-2 times a day.

Advantages and disadvantages

Pyrolysis boilers have a number of advantages over their traditional counterparts. But they also have some disadvantages. Let's discuss all their pros and cons:

• Profitability - it varies from 10 to 40%, depending on the model, intensity of combustion and air temperature outside the window;
• long burning - you can put fuel only 1-2 times a day. For example, morning and evening. At any time of the day, the house will be warm;
• Ecological cleanliness - firewood burns almost completely, with minimal emission of combustion products;
• Almost complete heat transfer to the heating system - the temperature of the exhaust gases here is lower than in traditional boilers;
• In long-burning pyrolysis boilers, various power control mechanisms are often implemented - they work by adjusting the intensity of fuel smoldering and gas supply to the afterburner.

There are also disadvantages:

Due to the impressive dimensions, you will have to find a lot of free space to accommodate the boiler. Basement and attic are the most promising options.

• High cost - user reviews say that long-burning pyrolysis boilers are very convenient, economical and practical. But the initial costs for their purchase are extremely high (most true for powerful volatile models);
• Energy dependence - such units are more efficient, but require connection to the mains (the total electricity consumption is small, but in its absence, work will be difficult or impossible at all);
• Large dimensions - long-burning pyrolysis boilers are noticeably larger than any other solid fuel units.

The disadvantages are not the most serious, some of them can be neglected. But you have to put up with the high cost.

Fuel used

We have already said that long-burning pyrolysis boilers run on wood. This is a fairly common and inexpensive type of fuel. In some cases, firewood can be obtained completely free of charge. But these boilers can operate on many other types of solid fuels. For example, in some stores we can buy a pellet pyrolysis boiler. It works on fuel pellets on the same principle as the above units.

The main advantages of pellet models are automated fuel supply (implemented in some units), low ash content of fuel.

You can also purchase a pyrolysis boiler on coal. It will please you with long burning and high efficiency. Coal-fired boilers work on the same principle of operation, generating combustible gas from coal. Due to the powerful calorific value, the frequency of approaches for laying fuel is lower than when using long-burning wood-fired pyrolysis boilers.

Popular Models

Popov's pyrolysis boiler is a simple non-volatile unit made of steel. The design turned out to be so successful that many craftsmen copy it, assembling heating equipment with their own hands. The presented boiler is omnivorous, it can burn almost any solid fuel. And an impressive furnace of gigantic volume allows you to count on almost 24 hours of continuous burning. At the same time, the fuel burns almost completely, forming a minimum of components harmful to nature.

One of the advantages of this pyrolysis boiler is the ability to lay logs of non-standard size (up to 75 cm in low-power models up to 240 cm in the most productive units), which ensures long-term burning. The maximum power of the equipment is 1000 kW, the minimum is only 25 kW. Depending on the selected operating mode, the efficiency of the device varies from 75 to 95%.

Boilers Geyser

Equipment from the manufacturer of the same name is represented by two lines - household and industrial. Household pyrolysis boilers Geyser of long burning have a capacity of 10 to 50 kW. They can operate on any solid fuel, characterized by a high efficiency. The volume of the furnace for the smallest model is 40 liters. The equipment is non-volatile and is characterized by extreme simplicity in operation and unpretentiousness.

Boilers Buderus

The solid fuel pyrolysis boiler of long burning Buderus Logano G221-20 from the well-known brand Buderus is an excellent purchase for heating your home. Its power is 20 kW, thanks to which it can heat rooms up to 200 square meters. m. The control here is mechanical, connection to a power source is not required. The heat exchanger here is made of cast iron - this affects the cost of the model, but makes it durable and resistant to corrosion. True, the efficiency of the heating unit is only 78%.

Its closest analogue is the more advanced long-burning pyrolysis boiler Buderus Logano S171-22 W. It has a high efficiency, which is 87%. The use of forced draft is responsible for this - inside we will find a small fan. Another difference is the steel heat exchanger. This does not add reliability, but it makes the equipment more affordable. The average fuel consumption is about 6 kg/hour.

Boilers Bastion

Pyrolysis solid fuel boilers of long burning Basting of the M-KST series are non-volatile equipment that runs on wood and other types of solid fuel. The line has been produced for 3 years and is characterized by a low number of negative reviews. The younger model has a power of 12 kW, the oldest - 50 kW. The boilers are endowed with powerful cast-iron heat exchangers, the minimum volume of the furnace is 40 liters. Of the benefits - a reliable design and affordable cost.

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