Solid propellant gas generating boiler. DIY gas boilers

8 January 2014 Alexei

There are a large number of ways to heat rooms for various purposes. All of them are sorted out by the owner of the building in search of the optimal and most profitable option.

But the possibility of using solid fuel equipment is most often not considered at all. Although modern gas generating solid fuel pyrolysis boilers have a lot of advantages.

And in some respects, they even surpass models that run on gas.

The principle of operation of pyrolysis equipment

The development of new devices for heating systems is carried out on the basis of research by specialists from institutes. At the same time, great attention is paid to the study and modeling of combustion processes. various kinds fuel to achieve:

1. Reducing his expenses
2. Increasing the level of heat transfer
3. Reducing harmful impurities in exhaust gases

The result of this work was pyrolysis solid fuel gas-generating boilers, the principle of operation of which is based on the property of wood to decompose into gas and a solid component.

This was found out during the research. But they also drew attention to the need for special conditions for the most effective course of the pyrolysis process.

• First, this set conditions, such as temperatures around 1000º C and oxygen deficiency during combustion
• Secondly, a certain moisture content of wood used as fuel

Only in the presence of all factors, firewood, burning, will be able to produce an additional type of fuel - gas, this process is called gas generation. This feature made it possible to call these solid propellant devices gas-generating or pyrolysis, because the process of obtaining gas from solid organic fuel is called pyrolysis.

Principle of operation:

Based on the characteristics of the operation of such pyrolysis equipment, it was possible to achieve the best indicators in terms of the amount of generated thermal energy than conventional models. And although almost all species are subject to this process solid fuel, but it is wood that can emit the maximum amount of gas, which was taken into account by the developers.

The unique design of the gas generating boiler

The biggest disadvantage of such equipment is its high cost. But she is the result of design features, and not some desire of the manufacturer to earn as much as possible. A pyrolysis gas-generating boiler must extract gas from wood, and for this certain conditions must be created, such as:

• Temperature in the furnace up to 800º C
• Minimum oxygen supply

To achieve such indicators, the developers had to divide the firebox into two chambers:

• boot
• combustion

The volumetric compartment in the lower part is used to load firewood and, depending on the power of the apparatus, it holds various amounts of fuel. In it, the wood is heated to the required temperature while being isolated from excess oxygen. The gas released in this case is fed into the upper chamber, where it is mixed with air and burned.

A design feature is the presence of reverse air movement in the lower chamber. The movement takes place from above, and this requires the presence of a smoke exhauster equipped with an electric drive and automation.

Heating compartments to significant temperatures requires high-strength materials. Therefore, in these boilers, the combustion chambers are most often made of steel or cast iron. Each of the materials has its own advantages and it is impossible to say that one of them is the best.

Equipment manufacturers

The choice of complex technical devices is associated with certain difficulties. Therefore, it is better to trust the technical documentation, while not forgetting the reputation of the manufacturer. Based on these parameters, the most competitive in the domestic market are gas-generating pyrolysis boilers of the following brands:

Their choice is not accidental, in addition to the excellent quality of products, all documentation is drawn up taking into account the rated power of the equipment.

Therefore, its study will allow the consumer to obtain truthful information about the duration of work on one tab and many other features of the functioning of the boiler.

In order to orient you a little in the capabilities of this equipment, we will short review several models. For example, consider gas-generating pyrolysis apparatuses operating on solid fuels:

• Logano (Buderus)

German boilers are presented model range with a power of up to 45 kW for steel samples and 36 kW for cast iron. Their efficiency reaches 85%.

At the same time, the duration of work on one tab is 2 hours. They are equipped with an automation system that includes a water temperature indicator and a safety limiter.

TO distinctive features include wood lengths up to 680 mm and the presence of built-in cooling heat exchangers.

French devices are somewhat inferior in power, it is limited to 30 kW. In terms of efficiency, they are also inferior to German models, having it from 50%. But here the length of the log was somewhat surpassed, in them it can reach 800 mm.

As you can see from the listed characteristics, each of them has its own advantages, and the choice depends only on your needs.

Main characteristics

Having decided on the manufacturer, you must select a model. To do this, you should specify such features as:

1. Permissible fuels
2. Energy dependence
3. Availability of automation systems
4. Price

Of all these parameters, consumers are most often interested in fuel. And if theoretically a gas-generating boiler can work on any of the solid types of organic origin, then in practice not all of them have good energy efficiency.

Why choose gas generators solid fuel boilers, watch the video:

For example, wood does not have the highest heat transfer, but it is chosen more often than others precisely for minimum expenses. However, for pyrolysis devices, this type of fuel is considered ideal due to the possibility of releasing large volumes combustible gas, which is very important for of this type devices.

Such models are especially popular in production where wood processing is carried out. In this case, the pyrolysis gas generating boiler is the best choice, as it will successfully work on production waste.

This will solve two problems at once:

• waste disposal
• Space heating

Your right choice

The purchase of heating equipment is based primarily on the availability of one of the fuel types.

And for those who do not have the opportunity to connect to the gas main the best option is a solid fuel gas generating boiler.

And this is facilitated by positive traits, such as: economical consumption of products and a small amount harmful emissions which is the most relevant today.

In the absence of gas, coal and cheap electricity, it is possible to solve the problem of heat supply with the help of efficient heating installations operating on wood - logs, waste, pressed briquettes. Such units are gas-generating boilers, the design of which differs from the conventional ones, working on wood, coal, etc. solid fuel.

The principle of operation and design of heating installations

The boiler of this type is equipped with a firebox consisting of two parts:

• The first is the loading chamber, in which, with insufficient air, the wood fuel decomposes into a solid residue (charcoal) and a volatile component, the so-called pyrolysis gas. The process of pyrolysis occurs with the release of heat, which dries the fuel and heats the air entering the combustion zone.
• Secondary air is supplied to the combustion chamber. Mixing pyrolysis gas and oxygen at high temperature causes the gas to ignite. During combustion, the pyrolysis gas reacts with active carbon, due to which the flue gases entering the atmosphere practically do not contain harmful components.

Attention! Gas fired wood boilers are characterized by low soot formation, so they need to be cleaned much less frequently than traditional solid fuel installations.

The main disadvantages of this heating equipment are energy dependence and restrictions on fuel moisture. The advantages include its ability to work on one tab for a long period - more than 12 hours.

As fuel, these installations use logs with a diameter of 100-250 mm and a length of up to 450 mm. Dimensions fuel briquettes should not exceed 300x30 mm. Veste with logs and briquettes, you can use small debris, the volume of which should not exceed 30% of the volume of the loading chamber.

Advice! The drier the fuel, the more power the unit will produce and the longer its service life will be.

Possibility of self-manufacturing of the unit

High prices for pyrolysis-type solid fuel equipment explain the desire of many consumers to make a gas-generating boiler with their own hands, drawings and detailed description on it, as a rule, are provided in a paid version.

One of the schemes was developed by designer Belyaev and involves the creation of a unit capable of providing thermal power about 40 kW. Air acts as a heat carrier in this system.

For the manufacture of a pyrolysis-type unit, you will need: a sheet 4 mm thick and pipes, the wall thickness of which must also be at least 4 mm, profile pipes, rod with a diameter of 20 mm, asbestos cord, fasteners. For the manufacture of the lining of the heating installation, you will need fireclay brick. To provide effective work unit and its convenient operation it is necessary to purchase thermostatic automation and a centrifugal fan.

A do-it-yourself gas-generating boiler can be created using the scheme of the inventor Yu.P. The unit is called Blago.

This heating installation provides long-term combustion of wood fuel with the formation of maximum number heat.

Attention! In the Blago apparatus, the bottom of the fuel bins is completely covered with grates. This design contributes high level heat of combustion of fuel and a long burning period with natural draft. Also, this device allows you to increase the volume of the fuel bunker without reducing efficiency.

Important advantages of the Blago boiler are its non-volatility and ensuring complete combustion of compounds of phenolic groups - resins, alcohols, essential oils.

The rails installed in the combustion chamber serve as excellent heat accumulators. Firewood, coal, sawdust, peat briquettes are used as fuel for Blagodarov's heating installations.

Pyrolysis plants of small manufacturers

If you cannot afford to make a pyrolysis unit on your own, and imported models are too expensive, then you can purchase a small-scale production unit. In the latter case, a number of rules must be followed:

• Request a license to manufacture this equipment. The license is not full guarantee the purchase of reliable and efficient products, but the risk of purchasing low-quality equipment is significantly reduced.
• Estimate appearance unit, the quality of welds. If possible, look under the decorative trim.

Attention! For the internal walls of the installation, metal with a thickness of at least 4 mm must be used.

• If ceramics were used in the production, then it is necessary to clarify the price of replacing the nozzle, which can be up to a third of the cost of the pyrolysis unit.
• Determine which heating system this equipment is intended for - open or closed.

Advice! The ideal option is to receive feedback from a consumer who has been using this equipment for more than a year.

For example, bastion gas-generating boilers, according to the owners, work quite normally in brick housing construction, even in regions with cold winters. Although the duration of burning on one tab in winter period is approximately 5-6 hours.

It is necessary to purchase with some power reserve. This is due to the fact that consumers are not always able to get perfectly dry fuel.

Advice! When purchasing or creating a gas-generating heating installation, it should be remembered that it is advisable to mount units of this design in separate room. This is a solid propellant apparatus, and when it is loaded, fuel fragments can scatter around the boiler room. Chimney for a 40 kW unit, it must have a diameter of at least 200 mm. It is necessary to insulate it along the entire height.

by the most effective way the use of wood fuels are gas-fired boilers on wood. Depending on the modification or manufacturer - the coefficient useful action such installations can reach 95 percent. In such devices, wood fuel burns almost completely, leaving no residue. Gas boilers at one time they were even used to drive cars, but now they firmly occupy the traditional niche for boilers - they are used to heat rooms and heat water. What is the working principle gas generating boiler, and how to choose a gas-generating boiler when buying?

When operating a gas-fired boiler, wood is used principle of pyrolysis. After laying the fuel (firewood or special wood briquettes), they go through several stages of combustion. Consider them:

1. Initially, wood fuel enters a special chamber, where it is dried.
2. The wood fuel then burns while maintaining a temperature between 20 and 850 degrees Celsius. At the same time, practically no oxygen enters the combustion chamber. Thus, wood fuel is oxidized,
3. The gas obtained as a result of oxidation enters the combustion chamber, where it is ignited and burns using burners.

Wood-fired gas-fired boilers used for heating purposes have a special water circuit. Inside it, water passes through two heating chambers, and only then enters the heating radiators.

Fuel for gas generating boilers

The undoubted advantage of gas generating boilers is the fact that they can operate on almost any type of solid fuel. That is, they can be loaded with ordinary chopped firewood, as well as any types of wood waste (sawdust, shavings) and briquettes, pellets and the like made from wood waste. In addition, gas generators are practically waste-free production: the fuel in them burns almost without residues.

Advantages of gas-fired heating installations

Installation heating systems, working from gas-generating boilers, working on wood fuel, has the following undoubted advantages:

1. Extremely high fuel combustion efficiency. In any plant designed to burn wood fuel, but not using the pyrolysis effect, the efficiency cannot rise above 90 percent.
2. Gas generator sets are non-volatile and can be installed even in buildings that do not have a connection to a stationary power grid. Note that during the war, gas generators were placed even on cars. The energy independence of the gas generator set also reduces the cost of its operation.
3. Almost any type of wood fuel can be used in a gas generating plant, from classic firewood to wood waste. The use of wood waste, sawdust, wood chips and so on significantly reduces the cost of gas generating systems. However, remember that out of the total amount of fuel at a time, the percentage of wood waste should not exceed 30 percent.
4. Large volumes combustion chamber allow gas-fired boilers for a long time work from one bookmark of fuel, which facilitates the operation of such an installation.

Disadvantages of gas generating plants

Despite the attractiveness of heating and heating systems based gas generating installations- such devices have certain disadvantages. The disadvantages of gas generating systems generally coincide with the disadvantages of conventional solid fuel boilers.

Solid fuel boiler, as opposed to automated liquid or gas systems has limited autonomy. Such a boiler always needs a human operator who will add fuel as it burns. Also, the gas-generating boiler must be regularly serviced, cleaned of soot and soot. Despite the almost complete combustion of organic wood fuel in gas-generating boilers, decay products are still present in such systems.

Purchasing a system with a gas generating boiler is quite costly in terms of financial plan. According to rough estimates, a gas-fired boiler will cost you one and a half times more than a conventional solid fuel boiler. But the difference in cost should pay off after a few heating seasons, based on the higher efficiency of the gas generating boiler.

Also, when operating gas generating installations, it is necessary to use only dry fuel. On wet wood or sawdust, the pyrolysis process may simply not start. Therefore, gas-fired boilers are often equipped with a drying chamber in which the fuel reaches the desired condition.

Comparison of gas generating and conventional boilers.

If we compare gas-generating boilers with conventional heating or heating boilers for solid fuels, then the following nuances can be distinguished.

The relatively low autonomy of the gas-generating boiler, which is the Achilles' heel of all solid fuel heating installations, can be corrected with the introduction of an automatic loading system. In this case, a kind of conveyor starts working in the gas-generating boiler, which, depending on the temperature in the device and the burning time, can send new portions of fuel to the furnace. In addition, the gas generating device can operate autonomously during the day only on one tab, which, in general, removes the question of the need for the constant presence of a stoker-operator.

In any case, the efficiency of gas generators significantly exceeds the achievements of all their counterparts. If conventional boilers on solid fuels are unlikely to be able to show an efficiency above 85%, then gas generating equipment this figure can reach 95 percent.

But a wood-burning gas-fired boiler is still quite complicated. technical device. Unlike a conventional wood-burning boiler, it requires a simple, but still regular Maintenance In addition, there are certain requirements for the qualifications of personnel who work on gas generating installations.

The gas-generating boiler most critically perceives the humidity of the fuel entering it. Therefore, only pre-dried firewood is required for the efficient operation of a gas generating installation.

Selection criteria for a wood-fired gas generator

1. First of all, it is necessary to take into account the degree of automation of the boiler, its non-volatility. You may want to purchase a boiler that can work for a long time without human intervention, and perhaps a gas-generating boiler will be enough for your purposes, which should independently, autonomously work out only one bookmark.
2. For space heating heating installations must generate at least one kilowatt for every 10 square meters heated area. Based on this, you can choose the required power of the heating gas-generating boiler.
3. In addition, wood-fired gas-fired boilers may have various additional equipment. It can be intended, for example, to provide forced circulation of liquid through the heating control or to automate the regulation of combustion processes of the resulting gas.

In any case, consultants in specialized stores will help you choose a gas-fired wood-fired boiler to your liking.

Gas-fired boilers on wood: video

An honest video review on the operation of the gas-fired pyrolysis boiler Dragon TA-15

Natural gas is the cheapest and most efficient heat source. Unfortunately, the main gas pipeline has not been carried out to all regions of our country, and even bottled gas is not delivered everywhere. However, this is not a reason to refuse to use it when heating a house, with the only exception being that you will have to make a wood-fired gas generator with your own hands. This is an alternative heating method, where not only firewood, but sawdust, pellets, waste from the woodworking industry, etc. will be used as the base fuel.

In the article, we will take a closer look at how to properly make such a unit, what is needed for this, and also look at the advantages and possible disadvantages of it.

How it works

In order to get natural gas, it is not necessary to look for a deposit and open a well, you can use a pyrolysis boiler. This is a special type of boiler equipment, where the fuel burns with minimal access to oxygen, decomposing into wood residue (coal) and combustible gas (propylene and ethylene).

Considering that the process of combustion of pyrolysis gases occurs simultaneously with the fuel, the efficiency of the boiler increases by 1.5-2 times at the same fuel consumption as a conventional boiler.

Slow combustion of fuel (wood, sawdust, pellets, etc.) provides a much longer burning process (12 hours compared to 3-4 hours in a normal one).

The diagram shows the principle by which the pyrolysis boiler works and how the process of formation of combustible (wood) gas proceeds.

Being already, in fact, gas generating equipment, such a boiler performs a number of tasks, namely:

1. Produces low molecular weight olefins as a result of combustion of firewood and its cellulose.
2. Purifies olefins from all third-party impurities, resulting in a clean combustible gas.
3. Cools gases by reducing the amount of energy during the final combustion of fuel.

The pyrolysis boiler is always divided into 2 chambers, in one of which the main fuel burns with minimal access to oxygen, the exhaust gases enter the second and, when air is pumped in, they are burned.

Such optimization of the combustion process allows solving 2 key tasks at once - an increase in the efficiency of the boiler and the ability to organize a water-heating boiler by connecting it to a water jacket.

The pyrolysis process ensures complete combustion of the fuel with maximum heat transfer, which results in more than 35% cost savings.

It is quite possible to make a gas-fired boiler on wood with your own hands, but before that you need to understand the principle of its operation, the arrangement of cameras internal combustion and safety precautions to exclude the slightest violations of technology.

Wood-burning model device and diagram

This type of boiler is fired exactly according to the same principle as a conventional solid fuel boiler. Firewood, pellets, briquettes, sawdust and other types of fuel are placed in the lower chamber, set on fire, after which the air damper opens to create traction.

The air damper should only be half open to avoid excess air entering the combustion chamber.

The device of a home-made gas-generating boiler is very simple. The basis is 2 chambers closed in one case. Solid fuel burns at the bottom, wood gas burns at the top. At the same time, the heated air constantly circulates through the air ducts - the warm air rises up and goes out, the cold air is sucked in from the outside, it heats up and also goes out. This process continues until the fuel is smoldering in the chamber.

The convection of a wood-fired gas-generating boiler warms up the room quite quickly (50 sq.m. in 60-90 minutes), while the heat is retained for a longer period of time.

How to DIY

The diagram shown above shows how the boiler functions, where and which chambers are located, therefore, before proceeding to self-assembly, it is necessary to understand the principle of operation of the finished boiler, as well as use the drawing of a solid fuel boiler.

On the video you can see how the gas generating boiler works:

1. The basis of the boiler (casing) is any metal barrel, even used gas bottle. It is possible to make such a cylinder from a sheet of steel 8-10 mm thick, for which we weld it around the circumference and weld the bottom.
2. In the upper part of the cylinder, make a chamber with a minimum volume of 0.7 cubic meters, where solid fuel will be loaded in the future.

1. At the very top of the cylinder, weld an additional circle of steel from which cold air will be drawn (skirt).

1. Coarse rings are used to purify wood gas from foreign impurities. It is blown through the tuyere.

1. Cold air is taken from the skirt to cool the gas. It passes through a zigzag of pipes equipped with several metal rings, gradually cooling down.

1. If insufficiently dry fuel is used for combustion, condensate will collect during operation of the boiler. It must be regularly lowered, for which a similar crane is used.

1. The gas-generating boiler is the only one in the line of heating equipment that allows you to use even wet - freshly cut - firewood. In contact with the cold air coming from the skirt, too much water is formed, which must be constantly drained. For this purpose, the so-called. separator. It is made from a pipe with a diameter of 3-5 mm, where a plate with ribs is inserted. Passing through the separator, water is removed from the system along the drain tape.

1. Dry gas is required to increase the power of a gas-fired boiler. To do this, just close the condensate drain valve and open the valve for gas pipe, which is located immediately behind the separator tube. When gas flows from a small pipe into a large one, it breaks up into gaseous and liquid fractions, after which it passes into the combustion chamber.

1. For heating large areas, it is recommended to install a water circuit. You can even make a separate chamber in a gas-generating boiler, where water will be heated with the help of incoming combustible gas. Due to convection during heating, it is simultaneously cooled.

1. When piping the boiler, it is recommended to use gas as a source of additional fuel. To do this, it is enough to connect the circuit and open the gas supply valve to the additional zone.

1. The combustion chambers are made of low-carbon steel, not subject to high temperatures and condensate.
2. Inside the body of the combustion chamber are fixed with bolts.
3. The housing and chamber cover is always sealed to prevent uncontrolled air ingress. An asbestos cord can be used as a sealant.
4. The body of the gas generating boiler is best made from an empty gas cylinder. To eliminate the risk of ignition of residual gas during installation work, fill it to the brim with water.
5. Be sure to install on the gas generator check valve which will prevent gas from escaping.
6. A fan can be used to pump air, but in this case the boiler will be volatile.
7. The grate for the solid fuel combustion chamber is made of cast iron strips. In order to make such a unit convenient to clean, make the center of the grate movable.
8. Provide a hatch in the loading chamber - with an excess of fuel and gas, it will allow you to dump part of the ballast.
9. To make a gas-generating boiler with your own hands, be sure to use the drawings, or even better, a failed boiler in order to accurately observe all proportions and dimensions.

Despite the high cost, after the purchase, a gas-fired solid fuel boiler helps to save on heating by reducing fuel consumption by 15-20%. An additional advantage is long time operation of the gas generator from one tab.

Gas boiler device

• Wood, when burned, releases a small amount of carbon dioxide. This process is called gas generation or oxidation.
• If create the necessary conditions, the burning rate slows down and the amount of CO increases.
• Carbon dioxide, after mixing with air in necessary proportions, forms a combustible-air mixture.
• The gas-air mixture burns well, and at the same time releases additional thermal energy.

Automatic boilers on, operate in a completely autonomous mode. The whole process, from air supply to combustion waste removal, is controlled by automation.

Specifications for gas generation

• Limited air access - in order for gas to begin to be released, it is necessary to restrict the flow of air, causing the wood to literally smolder.
• High temperature - the wood chars, turning into carbon and mixing with oxygen, forms carbon dioxide. For the production of CO, it is required to maintain heating in the furnace above 600°C.
• Humidity - raw wood, when heated, releases steam instead of carbon dioxide. For gas generation, it is required that the humidity does not exceed 20%.

Household gas-generating solid fuel heating boilers of domestic production are less whimsical to the quality of the wood used. In models with vertical loading and, it is allowed to use firewood with a moisture content of 30 to 42%.

Fuel consumption in gas generating boilers

• Combustion of fuel in gas-generating boilers is carried out more slowly, due to the lack of intensive air flow. When a tree smolders, less heat is released than when it is fully burned. The lack of thermal energy is compensated by the afterburning of the released carbon dioxide.
• Fuel consumption, in comparison with classical boilers, is reduced by 15-20%. At the same time, the amount of heat released during combustion practically did not decrease.
• The use of automation reduces fuel consumption by at least another 10%.

Is it possible to make a gas generator out of a simple boiler

• Furnaces and afterburners - in the device of gas generators, an enlarged combustion chamber is specially provided. Afterburning is carried out in a separate chamber made of fireclay bricks.
• The coolant surrounds not only the furnace, but also a broken smoke channel located inside the boiler. The scheme of the heat exchanger is quite complicated. The coolant must surround not only the furnace, but also the smoke channels.

• Limitation in the size of the combustion chamber - to create the temperature necessary in the process of gas generation, it will take a full-fledged burning of firewood for half an hour. All fuel will burn out in approximately 1.5-2 hours, which negates the efficiency of the converted boiler.
• Flaw free space will lead to an even greater reduction in the furnace, due to the installation of an afterburner.

Rules and conditions for installation and operation of the boiler

• Installation of a boiler with a capacity of up to 40 kW is carried out anywhere in a residential building, subject to compliance with the rules fire safety. A heat generator with a capacity of 40 kW or more is installed in a separate room.
• The size of the room for the boiler is at least 8 m². The presence of supply and exhaust ventilation is mandatory.
• The walls and floor of the boiler room are tiled non-combustible materials: ceramic tiles or cement-sand plaster.
• The chimney is made with a minimum number of corners and maximum length vertical section no more than 1 m. When passing through floor slabs and roofing, fire breaks are provided.

How to choose a gas generating boiler

• Design features - the consumer is offered boilers using the principle of upper and lower combustion, with a vertical and horizontal firebox. From these characteristics depends on the operating time, the acceptable quality of the fuel used and other operating parameters.
• Power - with an average thermal insulation of the building and a ceiling height of not more than 2.7 m, a formula is in effect that allows you to calculate the required boiler output: 1 kW = 10 m². Accurate calculation of the required power, taking into account all the features and specifications buildings, perform with the help of special.

The best manufacturers of gas generating equipment

In addition to already proven European factories, the production of boilers gas generating type, established by domestic companies. To facilitate the choice, all models can be divided into several groups on a territorial basis:

• Russian gas-generating boilers - domestic companies manufacture products either independently (as in the case of BTS, Teplov, F.B.R.Zh., Phantom, Bastion, Gasgen), or with the support of foreign partners (Lavoro). Products are adapted to domestic conditions. Changes in the design made it possible to use fuel with a moisture content of up to 30-42%.
• European boilers are traditionally considered the best in their class. Products are offered by Viadrus, Stropuva (practically the founder of gas-fired boilers), Atmos and others. Boilers of European concerns have a long service life, are distinguished by reliability, a high degree of automation and efficiency.

The cost of gas-generating boilers

Domestic boilers can be found starting from 30 thousand rubles. For a high-quality gas generator, similar to European models, you will have to pay about 80 thousand rubles. (Prices are approximate based on 30 kW output).

Pros and cons of boilers with gas fuel generation

• The duration of fuel burning in the gas-generating boiler is at least 6 hours. Some models, both domestic and European manufacturers, are able to work up to 3-5 days from one tab.
• Greater heat dissipation compared to the classic model. The efficiency of gas generating boilers is 80-92%.

• Fuel restrictions. The heat exchanger of a gas-generating boiler that runs on wood, when switching to coal, burns out after a year of operation. It is impossible to heat with wet firewood and wood waste.
• Cost - a classic boiler costs about 2-3 times cheaper.

Gas-generating boilers have no analogues among other models, regarding the duration of work from one bookmark, heat performance characteristics and other operating parameters. Somewhat limit the popularity of models - the high cost and features of operation.