11 Best solid fuel and combined heating boilers

Recently, more and more people are switching to long-burning boilers. This is due to the constant rise in oil and gas prices, which may also be temporarily blocked due to problems. It’s no longer a secret that investing in boilers is a very profitable investment, since this equipment can operate on cheaper materials, such as coal, wood or coke. In this article we have presented the best models of solid fuel boilers that were released in 2021.

Rating of solid fuel boilers

In this list you will find models with long-burning support from the most famous manufacturers. Such boilers can be placed in both residential and non-residential real estate. Many different companies are constantly releasing new and better models, so this list contains the best of the best models released in 2020.

Rating of the best solid fuel boilers of 2021

Ten best models of solid fuel boilers in 2021

10+. Solid fuel boiler Nedelka “KO-90”

Heats rooms of 150 - 400 sq.m.
An ideal option for a private home, cottage, car service center, as well as a car wash. On one load of 300 liters it can work for up to 7 days. Operating power: 15−45 kW (adjustable using automation). Peak power: 90 kW

You can buy Nedelka boilers here.

Advantages:

• Mass production;
• Made of Russian steel 5 mm grade 09G2S produced by MMK;
• The hatch for cleaning the heat exchanger can be located either on the left or on the right;
• All stages of production are controlled;
• Insured liability to the consumer in ROSGOSSTRAKH in the amount of 10 million rubles;
• Patented production technology;
• Availability of documentation confirming fire safety and reliability of use.

Flaws:

• Weight and dimensions, but this makes the boiler reliable, with good one-time loading;
• The presence of condensation may seem like a minus, but it is an indicator of the high efficiency of the boiler, and there are effective ways to reduce it;
• Energy dependence. Undoubtedly a minus, but easily corrected, when solving it the house always becomes warm, regardless of whether there is electricity or not.

Boilers Nedelka - company presentation

ZOTA Pellet 100A

This is a pellet-type boiler, which is characterized by a high level of automation of the process, when the device is capable of operating for several days without additional refueling with flammable materials. The design includes a screw fuel supply and an inflatable fan; it is perfect for the harsh Russian climatic conditions. The maximum power of the equipment is 100 kW, the volume of the fuel bunker is 606 liters. Due to the screw feed, absolute protection against overheating is ensured, and it also prevents flame from penetrating into the fuel storage bunker.

The built-in thermostat sends the device into standby mode when the required temperature is reached. The boiler is connected to the electrical network, from which all automation functions; it has automatic ignition. The main parameters are adjusted using the buttons located on the device body. Automation allows you to keep daily fuel consumption under full control, making the boiler’s operation more efficient and economical. Additionally, you can install a GSM module that allows you to remotely regulate the temperature in the system. The unit is able to heat a building up to 800 square meters.

Advantages:

• Screw fuel supply;
• Availability of an electronic control system for all elements;
• High power;
• High efficiency - about 90%.

Flaws:

• The need to connect to the electrical network;
• Considerable weight of the device.

Pellet boiler Zota ZOTA Pellet 100A

ACV TKAN 100

A fully automated device that uses coal, wood chips, firewood, etc. as fuel. It is characterized by a high efficiency - about 93%, fuel consumption is low - from 8 kg per hour when the boiler is set to maximum performance parameters. The boiler is absolutely safe during operation thanks to its fully sealed combustion chamber and forced air supply. The fuel supply mechanism is equipped with a fire damper.

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The convective part is equipped with a pneumatic cleaning system; for the convenience of using solid fuel, there are special grates. The maximum heated area is 300 square meters. m. The highest pressure in the heating system is 3 bar. The device is equipped with automatic equipment, powered by electricity, so the boiler needs to be connected to the network, the burner ignites independently. Basic settings are set using a special remote control located on the unit body.

Advantages:

• Not the largest mass of the product;
• High rated power and efficiency;
• Availability of electronic automation, ensuring safe operation and compliance with all set modes;
• Fuel is supplied using a screw mechanism.

Flaws:

• High price.

Long burning boiler ACV TKAN 100

ZOTA Topol M 20

The boiler is highly reliable and has a very attractive design solution. The fuel loading is vertical, an automatic draft regulator is provided, there is a gas burner connected directly to a household gas pipeline or to a cylinder, and there is a reliable heating element.

The maximum heated area is 150 square meters with a ceiling height of 3 meters. In the heating system, the highest pressure is 3 atmospheres, its volume is designed for 54 liters. The housing has good thermal insulation. Under the decorative casing there is a water jacket that prevents the boiler from overheating; it is additionally covered with basalt cardboard, due to which heat loss is minimal. The combustion door is equipped with a lock; one load of fuel burns out within about 12 hours. The boiler must be connected to a natural chimney, since its design does not include a fan.

Advantages:

• The burner is economical, due to which fuel consumption is reduced and thermal power is increased;
• Autonomous control;
• Possibility to use several types of solid fuel;
• Significant efficiency indicators - over 90%;
• Reliable assembly;

Flaws:

• Heavy weight.

ZOTA Topol M 20

Teplodar Cooper Praktik 8

The device is intended for placement in residential buildings and other premises, the area of ​​which should be in the range from 40 to 80 square meters. m. The product is universal; accordingly, it can be used in both closed and open heating systems. The method of coolant circulation does not play a special role - the device works stably with both artificial and natural methods. The boiler can be used as an independent source of thermal energy, but it is often installed as an addition to existing systems running on gas, electricity or liquid fuel. The boiler comes with a poker, a thermometer, a rotary valve and a screw. The device is characterized by small overall dimensions - it occupies a minimum amount of space in the room.

If necessary, the design can be improved with the help of an automatic draft regulator. This device allows you to control the combustion intensity, which significantly saves fuel. The product is suitable for any heating systems made even from small-volume polymer pipes, but in this case they must be connected through a special capacitive-type hydraulic separator. The convector casing here is of a perforated type, due to which the room where the boiler is located is additionally heated. The supply pipe is located on the upper surface of the structure; it is able to provide universal connection and protect the system from air entering it. The firebox is inclined, the fuel is evenly distributed in it. The damper-damper is made of cast iron; it can be used to protect the room from spilling smoldering slag and coals.

Advantages:

• Universal products that can operate on any solid fuel;
• Absolutely safe and well thought out design;
• High efficiency and efficiency.

Flaws:

• Requires placement in a separate room;
• The installation is quite complicated - it’s problematic to do it yourself.

Teplodar Cooper Praktik 8

ZOTA Yenisei 12

It has a very deep firebox, so it will be possible to load firewood up to 60 cm long into it. The firebox door is made at a certain angle, so it will be much more convenient to fill the combustion chamber with bulk fuel. The loading and ash doors fit quite tightly to the main body of the boiler, do not let combustion products into the room, and air will not enter the combustion chamber through them. This, in turn, will have a positive effect on cravings. You can control the combustion process with a special air supply damper. There is a thermometer on the side wall of the device that shows the temperature of the water leaving the boiler. If necessary, you can install a mechanical draft regulator, but you will have to purchase it separately - it is not supplied with the boiler.

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Electricity can be used as an auxiliary heat source. For this purpose, the boiler is equipped with special stainless steel heaters. The water jacket is located along the entire contour of the boiler, including under the ash pan. Due to this feature of the device, the amount of heat transferred to the coolant increases, and deformation of the ash drawer also does not occur. Advantages:

• Decent efficiency indicator;
• Can work with any solid fuel;
• It is possible to install additional parts;
• High quality workmanship;
• The doors fit tightly to the body.

Flaws:

• Servicing the device is somewhat problematic.

ZOTA Yenisei 12

EVAN WARMOS TT-18

This boiler can be used not only for residential, but also for industrial or agricultural premises. It can be used either as primary or additional heating equipment. The main rule is that it must be located in a room equipped with a natural ventilation system. For higher efficiency, the device is equipped with a flue gas combustion system.

The design has a heating element and a reliable draft adjustment system. The main function of the heating element is to maintain the water temperature to prevent the heating system from defrosting. The unit operates on the basis of natural circulation of water due to temperature differences, however, the pipes will need to be positioned in such a way that the coolant can pass through the system independently. If it cannot be ensured, then you will have to additionally install a circulation pump and an expansion tank that has direct contact with atmospheric air. The maximum pressure at which this boiler can operate is 5 bar. The unit is designed for an area of ​​up to 120 square meters.

Advantages:

• Easy to install;
• Reliable build quality;
• Possibility of using any solid fuel.

Flaws:

• The position of the damper must be adjusted manually to prevent excessive fuel consumption;
• Rapid fuel burnout.

EVAN WARMOS TT-18

Lemax Forward-16

It is a fairly simple device with nothing superfluous. The design is very reliable, does not require maintenance, and has a reasonable price. The body is made of decorative metal panels. Behind it lies a layer of thermal insulation, under which there is a housing made of low-carbon steel 4 mm thick. The fuel chamber is large and is protected from overheating by a water jacket.

To increase the strength of the equipment, the heat exchanger is reinforced with a channel, making the likelihood of rupture low. At the bottom of the device there is a heat-resistant grate; under it there is a box for slag and ash. It can be removed through the door on the front panel; it also acts as a damper that regulates the amount of air entering the combustion chamber from the room. The pipes through which the supply and return lines of the heating system are connected are located on the rear panel. There is also a chimney pipe with a damper that regulates draft. The boiler can operate on wood or brown coal; for convenience, there is a top fuel loading system.

Advantages:

• Possibility of using any type of solid fuel - coal, coke, firewood, and so on;
• Small overall dimensions, no need for constant maintenance;
• Convenient top or end loading;
• Low cost.

Flaws:

• Low efficiency;
• The need to regularly load fuel, as it burns out quite quickly.

Solid fuel boiler Lemax Forward-16

Kentatsu ELEGANT-03

The device is a very durable and reliable product, which is intended for heating rooms for various purposes. The control here is simple mechanical; there is no need to connect it to the electrical network. The device is capable of operating on coal and wood; it has a fairly durable heat exchanger made of cast iron and can withstand severe physical stress, including high pressure of the coolant itself. The grates here are cooled, and the overall productivity is high. The device is manufactured on the basis of a multi-section heat exchanger, which is produced using the new AminGas technology. It is resistant to corrosion processes and has good resistance to temperature loads. The fuel is burned completely due to the supply of secondary air. The boiler is single-circuit, but it can also be adapted to supply hot water - for this you will need to purchase indirect heating boilers. They are connected to the heating circuit, take part of the heat from there and direct this energy to spiral heat exchangers.

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The combustion chamber is spacious, the loading door is also quite large, so adding fuel is easy. The temperature of the heating circuit can be adjusted using mechanical draft control. The highest temperature of the coolant can be 90 degrees, the pressure should not exceed 4 bar. The boiler can be used in closed systems equipped with forced circulation.

Advantages:

• Quite reasonable cost;
• High performance;
• Acceptable dimensions;
• Universal device;
• Good manufacturing and assembly quality of the device;
• Long service life;
• There is no need to connect the product to power supply.

Flaws:

• The ash tray is not very conveniently located - getting it out is problematic.

Kentatsu ELEGANT-03

2. Teplodar Cooper OK 15

In the top solid fuel boilers, this unit is in an honorable third place, largely due to the long burning of the fuel. So, on one stack of firewood, the equipment can work for about 30 hours, briquettes burn out in two days, coal about 5 days. Perfect for residential, warehouse and even industrial premises, the area of ​​which does not exceed 150 square meters.

Both water and antifreeze can be used as a coolant; any solid fuel - briquettes, firewood, coal - can be used as fuel. When installing additional elements, the boiler will operate on electricity or gas. The heat exchanger is made of 12 tubes, which ensures high efficiency of the device. The door is sealed, due to which smoke will not pass into the room, and the fuel will burn much longer due to poor access of oxygen to the firebox - it is made on the basis of the state standard GOST 9817-95.

Advantages:

• High build quality of the device;
• Economical operation with significant efficiency;
• Excellent value for money.

Flaws:

• Significant mass, which makes it difficult to move the boiler from one place to another.

Cooper boiler. Reviews.

Teplodar Kupper OK 15

Stropuva Mini S8

The leader of our review of the best solid fuel boilers is capable of high-quality heating of a room whose area reaches 80 square meters. m. Coal, firewood, wood briquettes, and so on can be used as fuel. The burning time for one load of fuel is significant: ordinary firewood burns out in about 30 hours, briquettes in 48 hours. These are the maximum parameters that can be affected by the heat loss of the building, external air temperature, and fuel quality. The overall dimensions are not too large, the boiler takes up a minimum of free space. The design is not too complicated - the device consists of two cylinders placed one inside the other and made of steel. There is a layer of external thermal insulation, so you won’t be able to get burned on the walls of the boiler. The coolant passes through the space between these cylinders. Inside the smaller of them there is a combustion chamber, which is served through doors on the body of the device.

The combustion process itself occurs only in the upper layer of fuel. Heated air from a special chamber is directed here through a telescopic tube. When the top layer of fuel burns, the tube moves to the bottom layer and so on. This design solution allows you to increase the efficiency of the device, as well as adjust the temperature of the coolant depending on the needs of the user. Before entering the chimney, combustion products first flow around the air heating chamber, transferring their heat to it.

Advantages:

• Absolute energy independence of the product;
• Reliable and safe design;
• Can heat a large area;
• Uses fuel economically.

Flaws:

• Except for the rather high cost not found.

solid fuel boiler Stropuva Mini S8

The best solid fuel boilers

If you want to get a high-quality solid fuel boiler, but do not want to spend large sums on its purchase, this category is just for you. Here are models up to 20,000 rubles. As you might guess, they are not designed for large rooms. Despite this, in this top you will find durable boilers. Most are made of metal, have good efficiency and have useful gadgets. In addition, when selecting, we paid special attention to the quality of the design and coating, based on the characteristics of the device and customer reviews.

"Teplodar Cooper Praktik 14"

The list proudly opens with the boiler model “Teplodar Kupper Praktik 14”. Its heat is enough for rooms from 90 to 140 square meters. Teplodar Kupper produces good heating equipment that pleases with both price and quality.

Teplodar Kupper Praktik 14th in the rating of solid fuel boilers

These boilers are designed for use in residential premises. Its universal design allows this device to be used in both open and closed heating systems. Obvious advantages include compact dimensions, automatic draft regulator, high-quality supply pipe and the presence of a heating element unit. Buyers note stable operation and good build material. The pipe protects well from airing due to the fact that it is located on the upper surface.

Advantages:

• Heating element block.
• Easy to install.
• Automatic regulator.
• Efficiency up to 14 square meters.

Flaws:

• Low efficiency.

NMK "Sibir" KVO 15 TPE

This model attracts not only because it is made of steel, but also because it is efficient and durable. It can successfully heat houses up to 100 square meters, taking into account that the ceilings will not be higher than 2.5 meters. The design also provides for heating element-2, which has a power output of 3 kW.

NMK Sibir KVO 15 TPE in the rating of solid fuel boilers

This is enough even to heat the water. You can connect this boiler from any side of the heating network; it is also possible to connect pipes diagonally. The principle of operation itself is to release energy from fuel combustion to water. Also a separate advantage is the rapid heating of the bottom, walls and lid of the firebox.

Advantages:

• TEN-2.
• Steel parts.
• Ease of use.
• Heating water.

Flaws:

• Problematic installation.

EVAN WARMOS TK-9

This boiler model resembles a “potbelly stove,” which immediately attracts the eye of a sophisticated buyer. However, there is no automation here, which is a big minus. To cover it, the designers added a powerful 9 kW stove. For the most part, this device runs on wood fuel and coal.

EVAN WARMOS TK-9 in the rating of solid fuel boilers

Loading is only frontal, which is not convenient for everyone. The weight of this model is approximately 50 kilograms, and the maximum operating pressure is 2 ATM. Despite the shortcomings, many users speak positively about this model, noting its durability and high-quality components. Such a boiler would fit very well in a cottage or country house.

Advantages:

• Operating pressure.
• Durability.
• Nice stove.
• High quality components.

Flaws:

• There is no automation.
• Front loading.

"Lemax Forward-16"

Lemax has released their Forward-16, which is perfect for those who want to purchase a powerful solid fuel boiler. The device itself has 3 modifications: 13,16 and 20 kW. Such a boiler will perfectly heat houses and cottages, as well as domestic buildings, provided that they all have good air circulation and a water heating system.

"Lemax Forward-16" in the rating of solid fuel boilers

This model uses coke and coal as fuel. You can also use wood. According to the company, burning the material does not pollute the environment much and preserves the environment. Separately, it is worth noting the compact dimensions of the heat exchanger, which is made of expensive materials. There is also high efficiency and heat-resistant coating, which is a pleasant bonus for its price.

Advantages:

• Fuel.
• Preservation of the environment.
• Heat-resistant coating.
• Availability of modifications.

Flaws:

• Not detected.

ZOTA "Dymok-M AOTV-12M"

The new ZOTA model was recognized as the best solid fuel boiler in the budget segment. It has a cast iron plate and has the ability to detach the surfaces, which makes loading coal faster and more convenient. Also, the firebox itself allows you to load large firewood, up to 58 centimeters.

ZOTA "Dymok-M AOTV-12M" in the rating of solid fuel boilers

Air does not enter the boiler thanks to the ash door, which is made of high-quality materials. Thanks to this, the fuel itself produces more heat and burns better. The water jacket itself is reinforced with channels, which is also a plus. A pressure of 3 ATM does not deform the walls of the boiler in any way, which allows the device to function longer without breakdowns. You can also use electricity as an additional power source. A powerful chamber of 30 liters and a thermal power of 12 kW will perfectly heat your home without consuming a lot of resources. This boiler model can operate up to 7 hours at maximum coal load.

Advantages:

• The presence of a gas vent door.
• Reinforced water jacket.
• Comfortable fuel loading.
• Power.

Flaws

• Not found.

Types of pyrolysis boilers

There are two types of the device, differing in the location of the afterburning compartment. It can be located at the bottom or at the top.

Equipment with a lower afterburner

The most common modification of devices, due to ease of use. The fuel is placed in the upper chamber, which is very rational. The exhaust gases exit into the pipe located below. The main disadvantage of such devices is that the system will have to be cleaned quite often. This is due to the fact that when the fuel burns, ash from the upper compartment enters the afterburner.

Devices with an upper chamber

Such systems are less convenient, but have certain advantages. Ash does not fall into the afterburning compartment, which allows you to clean it much less often. In addition, pyrolysis gas is discharged upward through nozzles, where it burns and enters the chimney, cools and is discharged into the chimney. This system is more practical, but requires more material to make the smoke duct.

Modification of pyrolysis equipment with an overhead afterburner. Regular cleaning of this design will be carried out much less frequently.

Pyrolysis boilers can be equipped with various types of ventilation:

• Natural. Such devices do not depend on power supply. Must be equipped with a sufficiently high chimney to create the necessary draft.
• Forced. The devices are energy-dependent because they are equipped with various fans and pumps that are controlled automatically. They are characterized by a longer effective combustion time than devices with natural ventilation.

An important aspect of the selection of pyrolysis equipment is the material from which its body is made. The most common option is steel, at least 5 mm thick. This is a fairly strong and quite durable material. Its main disadvantage is its susceptibility to corrosion, which negatively affects its service life. The best alternative to such a device is a boiler in a cast iron casing. Such devices have higher heat transfer, last much longer and have increased resistance to acids and resins.

The best pyrolysis boilers

In this category you will find the best solutions powered by solid fuels. The main advantages of such boilers are complete combustion of the contents, automation and long combustion duration. Also, you don't have to worry about the sinter layer and can use split logs. All models on this list can operate at low power in the event of a complete lack of electricity. We recommend that you familiarize yourself with the representatives of the list if you want to purchase boilers that do not require constant maintenance.

Bourgeois K TA 20

Our list opens with a device with the funny name “Bourgeois K TA 20”. Despite the name, this boiler saves fuel very well, which is why it has gained its popularity. This device saves fuel 3-4 times more efficiently than other competing models, and at the same time the assembly itself is made of high-quality materials.

Bourgeois K TA 20 in the rating of solid fuel boilers

This ensures durability and good price-quality ratio. The cost is 1.5 times less than foreign models of 20 kW. Perfect for people who like to invest their funds practically.

Advantages:

• Durability.
• Economical.
• Efficiency.
• Good thermostat.

Flaws:

• Heavy.

Viessmann Vitoligno 100 VL1A025 30 kW

If you prefer only wood fuel and are looking for a suitable boiler, you should definitely pay attention to this model. Perfect for those who are tired of constantly throwing away coal. Thanks to the spacious loading chamber, you can safely stuff a bunch of large firewood up to 50 centimeters in length into this device.

Viessmann Vitoligno 100 VL1A025 30 kW in the rating of solid fuel boilers

Efficient heating is provided in houses up to 300 square meters. There is also an electronic display, which greatly facilitates the adjustment of the boiler and its temperature. According to customer reviews, there are no particular problems with adjustment, but it is best to use soft firewood.

Advantages:

• 87% efficiency.
• Long burning.
• Economical.
• Efficiency.
• Good thermal insulation.

Flaws:

• Soft firewood is required.

Geyser PK-20

If you have a large area and you want to heat it efficiently, then you may be interested in Geyser PK-20. When purchasing this unit, there is no need to spend personal time servicing the boiler several times a day.

Geyser PK-20 in the rating of solid fuel boilers

Just load the firewood and feel free to enjoy comfortable conditions in your home. The only negative is the dimensions of this boiler. When installing it, it is necessary to prepare the foundation. The cost-effectiveness of the model and ease of cleaning confidently promoted the Geyser PK-20 to third place on our list.

Advantages:

• Economical.
• Durability.
• Easy to use.
• Autonomy.

Flaws:

• Dimensions.

Bourgeois – K Modern 12

This pyrolysis boiler is unpretentious both in the amount of fuel and in its type. You can heat a large room using wood, coal, pellets, peat or briquettes. There is also a high efficiency (92%), which is definitely a plus. This boiler heats up to 120 square meters. The downside is the high consumption of consumables, but this is outweighed by the ease of maintenance. The high-quality assembly mixed with a stylish design also does not let us down.

Advantages:

• High efficiency.
• Energy independence.
• Design.
• Dimensions.

Flaws:

• High consumption of consumables.

SIV-100

The SIV-100 was recognized as the best pyrolysis boiler of 2021. It can efficiently heat 900 square meters, which is ideal for large homes and organizations. Some even heat entire workshops with it. With all this, the efficiency is 92%, which makes it the leader of pyrolysis boilers for 2021.

SIV-100 in the rating of solid fuel boilers

The power is 100 kW, and this is enough to heat residential and commercial premises, both in winter and at other times of the year. This is not just a boiler, but also a heat exchanger, and thanks to its technological combustion, large spaces can be safely heated. Also, an undoubted advantage will be the consumption of any type of fuel by this miracle of technology, even garbage and household rubbish. However, do not forget that the quality of the work itself depends on the quality of the fuel. For example, you can take logs. One bookmark is enough for a stable 10 hours of work. This boiler will be easy to use for both experienced owners and beginners.

Advantages:

• Large firebox.
• "Omnivorousness."
• Automation.
• High efficiency.
• Durability.
• Wide scope of application.

Flaws:

• Not found.

Fuel for pyrolysis boiler

Solid fuel pyrolysis boilers are practically omnivorous. Various types of solid fuel can be used as fuel: from ordinary firewood to peat.

Based on this, a boiler can be heated with any type of solid fuel, but still each type has its own inherent qualities and properties, so the operation of the boiler will also differ.

Therefore, fuel selection is a very important process.

• Using regular firewood.

  Firewood for solid fuel pyrolysis boilers must be dry (it is allowed to use firewood with a moisture content of no more than 20%). The heat transfer of the boiler depends on dryness.

  When loading logs into the firebox, they should be placed tightly together, and a free space of at least 20 cm should be left at the top. It is worth noting that unsplit firewood can also be used.

  When loading for the first time, it is necessary to use approximately half of the portion of firewood, the rest is placed as it burns out in the boiler. Firewood burns unevenly - it must be carefully laid out on the surface of the firebox all the time, while preventing the solid fuel pyrolysis boiler from cooling.

  The disadvantage of using firewood is that heating with this type of fuel cannot be automated. An advantage is the fact that this is a very environmentally friendly way of heating a room.

• Use of peat.

  When using peat as fuel for a solid fuel pyrolysis boiler, certain rules must be followed. Firstly, the firebox must always be cleared of ash, and secondly, the ash door must be closed.

  Peat should be placed on a grate. For better kindling, you can put some firewood on this layer and cover it all with another layer of peat. Then open the chimney valve and start lighting.

  During operation of solid fuel heating equipment, it is necessary to ensure that the peat always lies in an even layer. This arrangement of peat will ensure maximum heat transfer.

• Use of coal.

  To obtain the best level of heat using coal as fuel, it is necessary to use a special firebox - a shaft with a grate and vertical walls.

  The firebox must be high enough, the distance between the arch and the grate must be at least 50 cm. The combustion and ash doors must be made of cast iron, the optimal distance between the doors is 21 cm.

  In addition, it is recommended to strictly seal the doors. It should be remembered that when using coal, a new portion of fuel should be added only when the first one has flared up well. In this case, you need to constantly maintain an even layer and prevent the coal from burning to the grate.

• Use of fuel briquettes.

  Today, fuel briquettes are the most optimal means for heating solid fuel pyrolysis boilers. You can use both coal and peat briquettes.

  Thanks to the use of briquettes, you will receive high calorific value, an even combustion process (no need to interfere with the combustion process itself and adjust the layers), high density of the burning layer, a small amount of flame and a minimal amount of smoke.

  Another advantage is the combustion of the briquette without any residue and the convenience of packing the briquettes. The combustion chamber of a solid fuel pyrolysis boiler is carried out until the fuel briquettes are completely burned. If unburned briquettes remain, they are reused.

  The dimensions of a standard boiler firebox regulate the dimensions of the fuel used (dimensions of firewood or briquettes). As a rule, logs with a length of 400 mm and a diameter of up to 200 mm are used for fuel in gas generator boilers. The size of fuel briquettes is 300x30.

Along with firewood or briquettes, sawdust can also be used as fuel. But they should be taken no more than a third of the main part of the fuel by volume.

The operating instructions stipulate that the fuel moisture content should not be higher than 45%. The lower the moisture content of the wood, the greater the power of the boiler and the longer it can operate without repair.

For example, a kilogram of wood with 20% humidity when burned produces heat equivalent to 4 kWh, and firewood with 50% humidity produces only 2 kWh. In addition to the fact that with an increase in moisture content in the fuel, the specific heat of combustion decreases, fuel consumption increases significantly.

The best pellet solid fuel boilers

This type of boiler is environmentally friendly and highly environmentally friendly. This is due to the fact that they work on waste from various elements of the agricultural industry. Consumables are cheaper than full-fledged fuel, so maintaining such a boiler will be much cheaper. When purchasing pellet solid fuel boilers, you must take into account the fact that some models can only operate on one type of fuel. This list contains not only the best premium class models, but also decent models in the mid-price segment.

Stropuva S20

If you have a small house outside the city, this model is definitely worth your attention. The company is good in everything except price. Perfect for the best cottages up to 100 square meters. This model stands out for its performance. For example, with just one load of briquettes you can forget about changing fuel for three whole days. According to the developers, the efficiency is 91%, which is quite good for the dimensions of this model.

Advantages:

• Good performance.
• High efficiency.
• Easy care.
• Design.
• Dimensions.

Flaws:

• High price.

ZOTA Pellet 25

Despite its high cost at first glance, the consumables for this pellet solid fuel boiler are the most affordable. This model is so economical that it requires almost no material. One load of fuel with a power of 25 kW is enough for a day. And all this heats up to 250 square meters, which is quite good.

ZOTA Pellet 25 in the rating of solid fuel boilers

This model is one of the best among pellet boilers, so you definitely shouldn’t pass it by.

Advantages:

• High savings.
• Autonomy.
• Good thermal insulation.
• Functional.

Flaws:

• High price.

ZOTA Stakhanov 15

The legendary Stakhanov was mentioned in this model for a reason. This pellet boiler is durable and extremely efficient. At an affordable price, you get a powerful device that can be connected to a single-phase network.

ZOTA Stakhanov 15th in the ranking of solid fuel boilers

The system consumes the material specified by the manufacturer, and also has an autonomous ash removal system. However, the dimensions may be a disappointment to some as the floor will need to be prepared in advance for installation.

Advantages:

• High efficiency.
• Powerful.
• Effective.
• Easy to use.

Flaws:

• Heavy weight.

Buderus Logano G221-20

If you want to find the best solid fuel pellet boiler in terms of efficiency, this model is definitely for you. The device easily heats up to 200 square meters, heats up quickly and has one of the best thermal insulation on the market. Truly German quality, assembly and reliability are at their best as always. Many buyers claim that the purchase of this device pays off very well, since you get a not particularly fancy boiler with the best efficiency available today.

Advantages:

• Spacious firebox.
• You can put logs up to 70 cm.
• Energy efficiency.
• Design.
• German quality.

Flaws:

• Not found.

Teplodar Kupper OK 30

The best in terms of characteristics and customer opinion is Teplodar Cooper OK 30. This cast iron boiler is good for both price and performance. You can heat up to 300 square kilometers without spending a large number of consumables. When installed correctly, the heating temperature can reach 80 degrees, which is a definite plus. This equipment also runs on gas and electricity, which makes it universal.

Advantages

• High efficiency.
• Compactness.
• Democratic price.
• Various fuels.

Flaws:

• The need for high-quality installation.

Pyrolysis boilers – is it worth purchasing?

A pyrolysis boiler has its own disadvantages and features that consumers should know before choosing one or another heat-generating equipment. Authoritative experts willingly list the shortcomings first...

Who produces pyrolysis boilers and how?

An interesting fact is that famous manufacturers of heating equipment either do not produce pyrolysis boilers at all, or have one line of samples, rather experimental, as a tribute to fashion.

In catalogs and at exhibitions, reputable companies do not show barrel-shaped products with a large load of firewood at all, explaining this by the fact that they do not find advantages in this idea.

So-called pyrolysis boilers (large metal-intensive devices with afterburning gases, equipped with a fan and a large chamber for smoldering firewood) are made by those who chase the momentary mood of consumers - small firms, even garage production.

Let's figure it out - why is this situation?

What is meant by pyrolysis?

Pyrolysis - the generation of flammable gas and its subsequent combustion - occurs in all solid fuel boilers, to a greater or lesser extent. The same process occurs in a conventional stove - when burning wood or coal, there is not enough oxygen in some place, carbon monoxide CO appears, then it finds the missing oxygen and burns, releasing heat, turning from poison into ordinary carbon dioxide - CO2 .

As experiments back in the 1950s, a boiler equipment scheme was developed, where first the fuel smoldered with a lack of oxygen, then the resulting CO was burned in a secondary chamber. But the ideas were not implemented, as they did not provide any advantages with significant disadvantages and were expensive.

Now, in advertisements, poisonous carbon monoxide CO is called “wood gas.”

Scheme, features of work

Secondly, in the 2000s, when the average manufacturer had sufficient production capabilities and materials, production began at the household level. The false advertising aroused consumer interest, and sales and profits appeared.

The design of a pyrolysis boiler is usual - in a large chamber, a load of firewood first flares up, then the automation shuts off the air and if there is a shortage of air, the firewood smolders for a long time. The released carbon monoxide and a large number of ash particles - pure carbon C - mix with heated air in the secondary chamber, where they burn out.

This burner always has a reddish flame - a direct sign of a reaction involving carbon.

Design Feature

A special feature of the “pyrolysis boiler” design is the presence of a 50-100 W fan and forced air supply. Moreover, air movement occurs in the primary chamber between the firewood, due to swirling (creating a vacuum) at the location of the supply nozzle.

The presence of sensors and control automation that provides operating modes. Large size, additional metal parts, cameras.

The main structural difference is the large load of firewood and the presence around them of all the automatic equipment, nozzles, and combustion chambers.

Pyrolysis boiler price

But for the consumer, a pyrolysis boiler is primarily distinguished by its high price. It is necessary to compare products of the same power and performance class. It turns out that the price of a pyrolysis boiler will be 2–3 times higher than that of a product of a classical design.

For “non-garage” manufacturers, a product called “pyrolysis”, with ordinary home power, will cost 150 thousand rubles. And the “classic boiler” is 50 thousand rubles. For less famous ones, the price difference is 2 times - approximately 75 thousand rubles. and 35 thousand rubles.

Why do you need to pay 50-100 thousand rubles more? What's the benefit? How long will it take and how will this amount be repaid...

Current technical specifications

More or less serious manufacturers try not to give the true technical characteristics of pyrolysis boilers. Otherwise, everyone will see that there is nothing special there. They are replaced with advertising exclamations, slogans, or the presentation of false characteristics through secondary sources, without responsibility.

If you find the passport data of a pyrolysis boiler from a renowned manufacturer, for example Buderus, then suddenly it turns out that the efficiency is only 87% And for a regular boiler it is 80% Where is the fabulous “golden mountain” of saved firewood?

How economical is a pyrolysis boiler?

Let's calculate the savings with a pyrolysis boiler for the usual power of an average house. For example, let’s burn 20 thousand rubles worth of firewood in a conventional device over a 7-month season. At the same time, we will save about 1,800 rubles on pyrolysis, and the consumption of firewood will be 18,200 thousand rubles.

But an 80 W fan, having worked for 7 months at a price of about 5 rubles for 1 kW of electricity, consumes more than 1,500 rubles. Total - savings of no more than 200 rubles per year. Those. 50 thousand rubles spent will never pay off.

Even if somehow the savings are 1000 rubles (a miracle efficiency of more than 92%), still 50 years is not a serious period for payback. The biggest maximum is that the additional cost of boiler equipment should pay off in 10 years. Otherwise it is not profitable. There are no such indicators even close. What attracts a consumer’s pyrolysis boiler at this price is a large load!

Disadvantages of a pyrolysis boiler

It is possible to set a lot of wood on fire, after which it burns gradually for 12 hours or more. You need to approach the unit once or twice a day. This is what the consumer likes most.

But in return, the user in a private home receives big disadvantages:

• You can’t burn with raw wood, the boiler simply doesn’t work with it. The heat transfer of wet firewood is 2 times lower - the energy is spent on water evaporation, as a result they do not smolder.
• It is highly undesirable to use wood that produces resin - pine, spruce, birch - with deposits they heavily pollute the barrel, chambers, nozzles, and then it is all problematic to clean. What to heat with?
• It is not uncommon for firewood to be overused in the off-season, when you need to lightly heat it on a cold night... This actually completely cancels out the increased efficiency.
• The ash that necessarily remains from the firewood is carried out by stream into the chimney. The chimney becomes dirty, ash settles randomly, “downwind”, polluting everything around.
• Breakdown, incorrect operation, or unconfigured automation threatens massive CO emissions and large waste of firewood - carbon monoxide and wood particles do not burn out completely.
• High price, unreasonable waste of money.

What to choose - what are the benefits of a classic boiler?

An ordinary natural draft boiler is distinguished by the fact that it can immediately operate with a maximum oxygen supply without breakdowns, always, with any kind of firewood. Such reliability cannot but attract. At the same time, the ash remains where it should be - in the ash pit, and does not fall on people’s heads - ash content is a physical characteristic of wood that cannot burn completely.

But it can also perform pyrolysis functions - a chain from a configured thermostat controls the air damper in modern models, the boiler switches to smoldering, with the supply of secondary air. At the same time, the price among heating equipment is the most affordable.

To reduce the number of approaches to a classic boiler for its maintenance to 1 - 2 per day, there are several methods to increase the accumulation of generated heat. The most effective is the introduction of a heat accumulator, or the construction of heat-intensive massive structures. At the same time, it is advisable to use a slightly more powerful unit itself, with a greater return on accumulation per firebox.

The best long-burning boilers

This list is dedicated to the best long-burning boilers. They are more expensive than previous segments, but also provide more comfortable conditions. When compiling the top, we took into account the presence of a heating element, efficiency level and build quality. All presented models can be installed both in domestic and industrial premises. It is strongly recommended that you familiarize yourself with the technical characteristics of these models.

Viadrus Hercules U22D-4

Today it is quite difficult to find a high-quality solid fuel boiler with long burning. However, the top of these confidently opens with Viadrus Hercules U22D-4. It immediately catches your eye with its modern design, but this is not its main advantage.

Viadrus Hercules U22D-4 in the rating of solid fuel boilers

It runs on wood and can easily heat up to 200 square meters. It works almost silently and does not require a large number of consumables, but the main disadvantage is “pickyness”. This model only works on wood and nothing else. The weight is about 100 kg, which can also cause inconvenience. In general, the characteristics are pleasing, and users mostly respond positively to this model.

Advantages:

• Quiet operation.
• Economical.
• Energy independence.
• High quality components.
• Easy to use.

Flaws

• Only wood can be used as fuel.
• Weight.

Protherm Beaver 50 DLO

One of the best boilers in terms of price-quality ratio. The excellent performance of this cast iron device has been noted by the majority of satisfied users. Inorganic wool provides excellent insulation, so you don't have to worry about the temperature dropping at the wrong time.

Protherm Beaver 50 DLO in the rating of solid fuel boilers

With a single filling of the fuel tank, you don’t have to worry about replacement for the whole day. Allows you to easily heat 350 square meters.

Advantages:

• Power.
• Availability of air regulator.
• Ease of use.
• Easy installation.

Flaws:

• Lower productivity with wood than with coal.

Dakon DOR F 16

Like the model described above, this boiler fully justifies the investment in it. Although this device is only suitable for small houses, it is capable of calmly “eating” damp coal, which the competitor described above cannot boast of.

Dakon DOR F 16 in the rating of solid fuel boilers

The installation also does not cause any difficulties and has a high level of efficiency.

Advantages:

• Unpretentious.
• Almost silent.
• Price.

Flaws:

• He prefers coal.

Danko 20 TN

As funny as it may sound, this boiler has low efficiency, but is powerful in itself. The whole secret lies in technology. The controls are friendly and you can figure it out intuitively.

Danko 20 TN in the rating of solid fuel boilers

Just load the coal and you can calmly go about your business for 8 hours. If the size of the heated room does not exceed 180 square meters, then the loaded fuel will last for 12 hours. Easy to clean and runs quietly even on anthracite.

Advantages:

• Saving.
• Design.
• Consumes any fuel.
• Easy to use.

Flaws

• Difficult to find.

Stropuva S 40

The best in its segment. You can get up to 70 hours of heat by loading 50 kg of wood into this boiler. Not economical, but you can forget about any worries for a long time.

Stropuva S 40 in the rating of solid fuel boilers

An excellent option for a summer house or country house. It also has an extremely high efficiency, namely 95%. Capable of heating up to 400 square meters, and coal, coke or wood are suitable as fuel. Based on enthusiastic user reviews, it was concluded that the purchase of this equipment will fully pay for itself in the near future.

Advantages:

• Best efficiency.
• 70 hours of battery life.
• Reliable.
• Works without interruption.
• High quality components.

Flaws:

• High price.

Categories of solid fuel boilers

There are several types of boilers:

• solid fuel;
• pyrolysis;
• long burning.

The solid fuel unit is capable of consuming various types of fuel, while simultaneously solving the problem of recycling waste such as sawdust, wood chips, and seed husks.

Modern models have a high degree of safety and reliability.

Pyrolysis boilers use wood waste as fuel. It is then that they provide the highest efficiency (up to 95%). Warranty service life up to twenty-five years.

Important! Remember that boilers “require” dry fuel to be put into them! If the humidity of the wood material exceeds 35%, the power drops sharply, and in some cases the device may turn off altogether.

The advantages of long-burning boilers include:

• environmental friendliness;
• high efficiency;
• the ability to regulate the combustion process;
• automated control system;
• low fuel price.

Good solid fuel boilers for a summer residence

In the final selection, we have collected the best models in premium and budget options for cottages and country houses. All models were selected based on efficiency level, price-quality ratio and customer reviews.

ZOTA Master 18

This boiler model is perfect for a dacha. This device perfectly heats small houses and does not require special knowledge in care. The main feature is not only heating the house, but also the ability to cook food.

ZOTA Master 18 in the rating of solid fuel boilers

This combi boiler runs on brown coal. Logs can grow up to 70 centimeters in length. You can remove the cooking zone.

Advantages:

• Dimensions.
• Heat exchanger.
• Easy to care for.
• Possibility of cooking.
• Semi-automatic mode.

Flaws:

• Average equipment.

Siberia KVO 10 TPE

Despite the cooling name, this boiler provides warmth throughout the house. It is efficient and does not require much fuel. Small dimensions and a 12 mm steel plate make this boiler very convenient in small country houses.

Siberia KVO 10 TPE in the rating of solid fuel boilers

There is also a cooling system; this boiler is powered by coal and wood.

Advantages:

• Size.
• Price.
• Reliability.
• Quality.

Flaws:

• Average power.

Buderus Logano G221-40

This cast iron solid fuel boiler is powerful and durable. It can easily heat up to 400 square meters, and can be used either autonomously or with a gas boiler. An excellent choice if you have a massive dacha and want to be warm in every corner of it. It feeds on coal, wood or coke.

Advantages:

• Power.
• Design.
• Energy independence.

Flaws:

• Not the highest efficiency.

Dakon DOR F27

The new shape of the combustion chamber immediately attracts attention. High efficiency and balance in fuel consumption make this model one of the best in its segment. Top loading of fuel greatly simplifies operation, and the price pleases a large number of buyers. Many speak well of the smooth operation and durability of the equipment.

Advantages:

• Design.
• Energy independence.
• Easy to maintain.
• Price.

Flaws:

• Separate purchase of heat exchanger.

Candle S-18 kW

Thanks to the new operating technology, this model tops our list. The whole trick is that only the top layer of wood or briquette burns. Therefore, one bookmark is enough for 7 hours of operation, which makes this boiler very economical. 32 hours of continuous operation can be achieved, and the dimensions allow it to be installed without any floor preparation. Also attractive is the modern design.

Advantages:

• High efficiency.
• Not bad power.
• High economy.
• Compactness.
• Energy independence.

Flaws:

• Not detected.

Types of solid fuel boilers

Solid fuel boilers are mainly classified according to their operating principle:

• Classic - similar to a conventional oven. Heat is released and transferred to the coolant through the combustion of solid fuel; to maintain the temperature, the firebox must be loaded regularly.
• Pyrolysis - the fuel in such devices does not burn, but smolders, resulting in the release of gas saturated with heat. Such boilers have increased efficiency due to the conversion of a small amount of fuel into a large amount of heated gas, the heat from which is transferred to the heat exchanger.
• Pellet – special pellets are used as fuel. Such boilers are volatile because they require control by electronic sensors. Models with a similar principle of operation are equipped with an automatic supply of pellets and a hopper for storing them.
• Long burning - equipped with an elongated firebox surrounded by a water jacket. In such fireboxes, fuel burns from top to bottom according to the principle of a candle, due to which complete combustion is achieved and the burning life of the filling is increased. The uninterrupted operation and safety of such models is ensured by emergency extinguishing fans and a circulation pump.