Review of the best long-burning solid fuel boilers made in Russia: the most successful models produced in Russia, comparison of characteristics, reviews and prices

To provide warmth in your home or country house, your own autonomous heating system is installed all year round.

A long-burning solid fuel boiler (TCDG) can be an effective source of thermal energy . It is capable of operating for a long time on one load of fuel, which is facilitated by special technology.

Such equipment from leading domestic and foreign manufacturers is widely represented on the Russian market.

The question of how to choose the optimal model deserves special attention.

Rating of the TOP 10 best long-burning solid fuel boilers of 2020

Long-burning solid fuel boilers are becoming indispensable in regions where there is no need to think about natural gas yet. They have proven to be very effective.

You can choose a model for a specific fuel type or choose a universal model. When choosing, you should take into account the main criteria.

The rating of the best models allows you to choose the best option.

Place	Name	Price
TOP 5 best long-burning solid fuel boilers with a water circuit
1	Stropuva S30 30 kV	Find out the price
2	Stropuva Mini S8 8 kW	Find out the price
3	Teplodar Cooper Expert 15	Find out the price
4	Teplodar Cooper Expert 22	Find out the price
5	ZOTA Carbon 50	Find out the price
TOP 5 best long-burning solid fuel boilers without a water circuit
1	Teplodar Cooper Expert-45	Find out the price
2	TermoKRoss TKR-08D	Find out the price
3	Aremikas Candle 35 kW	Find out the price
4	Stropuva S40 40 kW	Find out the price
5	Stropuva S15 15 kW	Find out the price

Model of heating equipment Hearth

Devices of this brand are made of steel and are most effective when heating rooms up to 250 m². These are products of Gazstroy LLC, they are considered one of the best among local analogues.

Solid fuel boilers Hearth come in three models:

New
Standard
With heating elements

Since all devices from this manufacturer are universal, they are equipped with gas burners.

The solid fuel boiler Ochag has only positive reviews, despite the fact that it is still only 2 years old. It has a modern design and is equipped with a traction control.

Standard equipment is divided into single and double circuit. The latter are equipped with a coil. Their power varies from 6 to 31 kW.

The modern modification is equipped with two special holes for heating elements and has an elongated firebox designed for firewood.

But their greatest advantage is the ability to switch to another type of fuel - gas. So, when connecting the main line, there is no need to change the boiler; it will be enough to install an appropriate gas burner in it.

What to look for when choosing?

When choosing a TKDG, the main attention should be paid to the following characteristics:

Type of fuel . The units can be designed for a specific fuel or be universal. Main options: coal, firewood, peat, pellets.
Boiler power . It determines the heated area. For domestic needs, usually does not exceed 100 kW.
Number of circuits : single-circuit or double-circuit.
Loading chamber volume . The duration of operation without new fuel loading depends on it.
Cost-effectiveness , i.e. fuel consumption. The main indicator is efficiency.
Durability or service life.
Control systems : electronic or mechanical.
Safety . Critical protection systems must be provided.
Price.

You should also pay attention to the material of the body and combustion chamber, loading method (manual, automatic, semi-automatic), volatility, weight and dimensions.

Stropuva S20U

at a price of RUB 117,760.

The original design of the Stropuva S20U model, originally from Lithuania, ensures that one load of fuel burns for up to 120 hours.
Unlike most solid fuel boilers, here the fuel burns from top to bottom, and not vice versa. There is layer-by-layer combustion of coal, pellets, briquettes or firewood with air supplied to the combustion area. This approach, in addition to a long laying interval, guarantees economical fuel consumption and an efficiency of 85%. If you plan to work only with wood, then the product will be completely energy independent. To burn coal, it is necessary to use a fan for forced air injection; accordingly, such a modification requires a connection to the network. It works best when using high-calorie coal. Up to 116 kg of such fuel is placed in the combustion chamber, while firewood is about 54 kg. The manufacturer especially emphasizes the need to install the product by specialists, because independent installation does not always take into account all the nuances and, as a result, the coolant boils and other unpleasant consequences. Main technical characteristics of Stropuva S20U

Characteristics	Values
Rated power, kW	20
Heated area, m²	200
Efficiency, %	85
Fuel	firewood 450×250 mm, pellets, coal, briquettes
Heat exchanger material	steel
Number of circuits	1
The combustion chamber	open
Chimney diameter, mm	180
Dimensions, mm	2100x557
Weight, kg	245
Homeland of the brand / Production	Lithuania/Russia
price, rub.	117 760

Watch video review of Stropuva S20U:

The best solid fuel boilers with a water circuit

Based on consumer reviews and expert opinions, we have compiled a rating of TKDGs from different manufacturers.

Below is the TOP 5 best models with a water circuit.

Stropuva S30 30 kV

Among the best models, TKDG Stropuva S30 stands out. The unit is capable of heating a room with an area of 200-300 m2.

Firewood and pellets are used as fuel. Combustion occurs according to the “top-down” principle. The boiler does not require electrical power. Traction is provided by a special bimetallic regulator. Mechanical control.

The heat exchanger is made of stainless steel. Has a floor-standing design. Despite its considerable dimensions, the boiler has an ergonomic design. An air distributor for firewood and pellets is provided.

There is a valve for maintaining pressure up to 2 bar.

Specifications:

thermal power - 30 kW;
fuel capacity – 342 dm3;
burning time on one tab – 31 hours;
volume of water in the boiler – 51 l;
Efficiency – no less than 85%;
water temperature – 75 degrees;
dimensions – diameter – 68 cm, height – 185 cm.
weight – 280 kg.

pros

simplicity of design and control;
affordable price;
long burning on one tab;
energy independence.

Minuses

not designed for coal;
mechanical control;
no display.

In the budget category, this model especially stands out for its reliability and durability.

Stropuva Mini S8 8 kW

The Stropuva boiler line is adequately represented by the Stropuva Mini S8 model. The device is designed to heat a room up to 80 m2. Fuel - firewood and wood briquettes.

It consists of 2 cylindrical chambers made of stainless steel. Top combustion of fuel is ensured. Air is supplied to the firebox through a telescopic pipe. Automatic adjustment of its supply is provided. The boiler maintains a cyclic operating mode. Mechanical control.

Fuel loading is manual. The water temperature is changed by a bi-thermal draft regulator. The control is based on a very simple design but reliable automatic valve. Installation - floor.

Specifications:

thermal power 8 kW;
burning time on one stack is 30 hours (48 hours on briquettes);
Efficiency – no less than 85%;
water temperature – up to 90 degrees;
dimensions – diameter – 55.5 cm, height – 136.5 cm.
weight – 145 kg.

pros

small dimensions;
European quality certificate;
optimal heat removal;
energy independence.

Minuses

the rough surface of the body makes cleaning difficult;
Difficulty loading.

This model is ideal for small houses and cottages, as noted by most consumers.

Teplodar Cooper Expert 15

Teplodar Kupper Expert 15 is a Russian-made heating TKDG, designed for rooms with an area of 100-150 m2. Firewood, briquettes and coal can be used as fuel.

The design additionally includes a built-in heating element to maintain the coolant temperature. There are 4 operating modes: fast warm-up, Classic, Medium and Maximum. For ease of maintenance there are 2 cleaning hatches. Combustion is ensured from top to bottom.

The fuel loading door is protected by a stainless steel screen. Heat exchanger material – stainless steel. Control is mechanical. Installation - floor.

Specifications:

thermal power - 15 kW;
burning time on one tab – 24 hours;
Efficiency – 90%;
water temperature –60-95 degrees;
dimensions – 51.3x88x77.5 cm;
weight – 148 kg.

pros

different operating modes;
adjustable coolant temperature over a wide range;
convenient cleaning;
affordable price.

Minuses

lack of built-in expansion tank;
energy dependence when using heating elements.

The model is popular because combines price and reliability well.

Teplodar Cooper Expert 22

The Kupper series is represented by the high-power TKDG Teplodar Kuppe Expert-22. The boiler is capable of heating a house up to 220 m2.

Structurally, the model is largely similar to the previous device. To maintain the temperature, a 6 kW heating element is installed. The long process is ensured by top combustion.

Efficiency is increased due to a developed heat exchanger and 3-zone air supply. You can set 4 different operating modes. You can lay coal, firewood, pellets. The chimney carries combustion products back. Control is mechanical. Installed on the floor.

Technical specifications:

thermal power - 22 kW;
firebox volume – 45 l;
burning time on one tab – 31 hours;
volume of water in the boiler – 90 l;
Efficiency – 90%;
water temperature – up to 95 degrees;
dimensions – 51.3x88x88.3.
weight – 165.5 kg.

pros

possibility of quick heating;
large area of the heated house;
availability of economy mode;
Ease of Management.

Minuses

energy dependence;
mechanical control;
lack of a built-in pump.

Widespread use for heating large houses is explained by its affordable price and high quality.

ZOTA Carbon 50

One of the best TKDGs is the ZOTA Carbon 50 model, which can heat houses and industrial premises with an area of more than 400 m2. The unit is designed for coal fraction 10-50 mm.

A special air supply control system ensures long-lasting fuel combustion. The body is made of high-strength boiler steel. Top coal loading and a three-pass gas duct are provided.

You can additionally install a heating element to maintain the temperature during fuel combustion. The kit includes an adjustable chimney pipe. The ash pan is located on the cooled surface. The movable grate makes cleaning easier.

Specifications:

thermal power - 50 kW;
fuel capacity – 87 dm3;
burning time on one tab – 30 hours;
volume of water in the boiler – 102 l;
water temperature – 90 degrees;
dimensions – 91.5x69.5x117 cm;
weight – 303 kg.

pros

high-strength body;
large combustion chamber;
convenient cleaning;
high thermal power;
high working pressure.

Minuses

lack of a built-in pump;
increased price.

Consumers note that the high cost of the unit is consistent with its power and reliability.

Sime SOLIDA EV 3

at a price of 90,870 rub.

Model of Italian cast iron single-circuit boiler Sime SOLIDA EV 3 with a maximum power of 23 kW.
The equipment is non-volatile, with an open combustion chamber. Firewood (up to 20 kW), coal (up to 23 kW) and coke can be used as fuel. Due to the increased firebox, in terms of aggregate indicators, it best reveals its potential when using firewood. Front loading of fuel is used, which facilitates operation and ensures safety during kindling. The boiler has a built-in thermostatic regulator to control the supply of primary air and a manual one for secondary air. If necessary, a cooling circuit can be connected to prevent overheating of the equipment. There are water-filled grates that increase the heat removal surface. Among the features we can also note the presence of large sashes for ease of maintenance and the durability of the product due to the use of eutectic cast iron, which is durable and resistant to corrosion, the absence of sinks and the ability to withstand temperature changes of the coolant. Main technical characteristics of Sime SOLIDA EV 3

Characteristics	Values
Rated power, kW	20-23
Heated area, m²	200
Efficiency, %	67,7
Fuel	firewood 100x330 mm, coal 20-40 mm, coke
Heat exchanger material	cast iron
Number of circuits	1
The combustion chamber	open
Chimney diameter, mm	150
Dimensions, mm	500x1023x425
Weight, kg	226
Homeland of the brand / Production	Italy/Italy
price, rub.	90 870

Watch a video review of Sime SOLIDA EV 4 - models from the same line as EV 3, but with a power of 34 kW:

The best solid fuel boilers without a water circuit

Below is the TOP 5 TKDG models without a water circuit, especially distinguished by their quality and reliability.

Teplodar Cooper Expert-45

The top five TKDG includes the Teplodar Kupper Expert-45 model, capable of heating a room with an area of 200-450 m2. The boiler can operate on almost any type of solid fuel.

Heat exchangers and grates have a large contact area with heated gases, which increases the efficiency of heat removal. Operation can be provided in 4 modes, incl. on economical and maximum.

The tilting door and special tray make loading easier. The fast heating mode allows you to heat the coolant in 30 minutes. A simple but reliable draft regulator is provided. There is a built-in heating element. Installation method: floor.

Specifications:

thermal power - 45 kW;
burning time on one tab – 24 hours;
Efficiency – at least 75%;
water temperature – 95 degrees;
dimensions – 103x65x81.5 cm;
weight – 207 kg.

pros

increased power;
the presence of a mode of increased combustion duration;
economical fuel consumption;
ability to work on any solid fuel.

Minuses

mechanical control;
energy dependence when installing heating elements;
lack of built-in expansion tank.

The boiler is designed for large houses, and under these conditions it shows itself to be very effective.

TermoKRoss TKR-08D

The TermoKRoss TKR-08D boiler receives many positive ratings. This is a single-circuit type unit with a closed firebox. Combustion occurs from top to bottom.

It can heat a room up to 80 m2. Air is supplied through a special valve directly into the combustion zone. Designed to work on firewood and wood briquettes, coal and pellets.

Mechanical control. The heat exchanger is made of stainless steel. You can additionally install a heating element to maintain the temperature when the wood burns. The chimney diameter is 160 mm. Overheating protection is provided.

Specifications:

thermal power - 8 kW;
burning time on one stack of wood – 35 hours, coal – 170 hours;
volume of water in the boiler – 38 l;
Efficiency – 91%;
water temperature – 95 degrees;
dimensions – diameter – 56 cm, height – 140 cm.
weight – 175 kg.

pros

compactness;
simplicity of design and control;
increased operating time on one load;
energy independence in the absence of heating elements.

Minuses

mechanical control;
reduced power.

The boiler is fully adapted to Russian conditions and has an affordable price.

Aremikas Candle 35 kW

Among the leaders, the solid fuel single-circuit boiler Aremikas Candle 35 kW stands out, designed for heating a house with an area of up to 300-350 m2.

It has a floor-standing design. When burned, only the surface layer of fuel up to 20 cm thick burns. Firewood and wood briquettes are used as fuel. Mechanical control.

The firebox has a cylindrical shape. The heat exchanger is made of stainless steel. There is an automatic draft regulator that allows you to change the temperature of the coolant.

Specifications:

thermal power - 35 kW;
fuel capacity – 400 dm3;
burning time on one tab – 34 hours;
Efficiency – at least 80%;
water temperature – 90 degrees;
dimensions – diameter – 70 cm, height – 207 cm.
weight – 315 kg.

pros

significant thermal power;
possibility of connecting a boiler;
large firebox volume;
economical fuel consumption.

Minuses

the use of coal is not provided;
significant weight;
increased cost.

The boiler allows you to heat large volumes of premises, which compensates for the high price.

Stropuva S40 40 kW

The Stropuva S40 40 kW model is noted among the leaders of high-power TKDG. The unit has one circuit and can heat an area of up to 400 m2. You can connect an external water heater.

An open combustion chamber is used. Firewood is recommended as fuel. Mechanical control. Floor installation in a separate room. The heat exchanger is made of stainless steel.

Protection is provided by a safety valve. There is a special device for air distribution. The maximum water pressure in the circuit is 1.5 bar. A chimney with a diameter of 200 mm is provided.

Specifications:

thermal power - 40 kW;
burning time on one tab – 31 hours;
Efficiency – 92%;
water temperature – 60-95 degrees;
dimensions – diameter – 68 cm, height – 212 cm.
weight – 291 kg.

pros

simplicity of design and maintenance;
significant power;
Possibility of cascade connection;
complete safety.

Minuses

lack of expansion tank;
significant height of the unit;
increased cost.

Great possibilities for heating huge houses compensate for all the shortcomings.

Stropuva S15 15 kW

One of the best representatives of the Stropuva family is the single-circuit solid fuel boiler Stropuva S15. It copes with heating rooms up to 150 m2.

The design includes 2 steel cylinders that fit inside each other, with external thermal insulation. The heated coolant is directed into the space between the cylinders. Air is supplied through a telescopic pipe. Fuel – firewood and wood briquettes.

Installation - floor. The parameters are regulated by a bithermal draft regulator. Mechanical control. No electricity required to operate. The safety valve ensures complete safety.

Specifications:

thermal power - 15 kW;
burning time on one stack is 30 hours (48 hours on briquettes);
Efficiency – no less than 85%;
water temperature – 90 degrees;
dimensions – diameter – 56 cm, height – 172 cm.
weight – 200 kg.

pros

compactness;
high reliability and safety;
energy independence;
economical fuel consumption.

Minuses

reduced power;
lack of expansion tank and built-in pump.

The boiler is designed for heating relatively small rooms where large thermal output is not required.

Viadrus Hercules U22D 4

at a price of 53,700 rub.

Czech cast iron boiler Viadrus Hercules U22D 4 with a power of 20 kW for burning wood.
It has 4 sections, so the depth of the combustion chamber is 340 mm, and the maximum length of the logs is 270 mm. Can be used in heating systems with both forced and natural coolant circulation. Supplied with thermomanometer. Temperature regulation occurs using a mechanically driven thermostat, which drives the air damper. Manual control possible. The operating temperature range of the coolant should be between 60-90 degrees, but the closer the value is to the upper limit, the less pyrogenetic water is formed and the fewer problems with cleaning the boiler. This suggests that the presented model best reveals its properties in conjunction with a heat accumulator. Main technical characteristics of Viadrus Hercules U22D 4

Characteristics	Values
Rated power, kW	20-23,3
Heated area, m²	200
Efficiency, %	80
Fuel	firewood 270 mm
Heat exchanger material	cast iron
Number of circuits	1
The combustion chamber	open
Chimney diameter, mm	156
Dimensions, mm	550x780x1010
Weight, kg	247
Homeland of the brand / Production	Czech Republic / Russia
price, rub.	53 700

Watch a video review of the Viadrus Hercules U22D, but not with four, but with six sections:

Operating principle of TKDG

Long-term combustion in a TKDG furnace can be ensured in 2 ways:

Top combustion principle . In the combustion chamber, the fuel does not burn, but smolders with limited access to oxygen. The cylindrical firebox is located at the top of the unit and has a cylindrical shape. The gas released during smoldering enters the afterburning chamber, where a supply of atmospheric oxygen is ensured for its complete combustion. As a result, almost complete combustion of the fuel occurs with the active release of thermal energy.
Pyrolysis principle . The combustion chamber is located at the bottom. Active smoldering of fuel also occurs here with limited access to oxygen. The combustible gas rises up and reaches the second chamber, where, enriched with oxygen, it burns completely.

Thus, the duration of combustion is ensured by the two-chamber design of the unit, when the fuel slowly smolderes in the firebox, and the released combustible gases burn in the second chamber.

Prometheus brand equipment

Russian long-burning solid fuel boilers are produced by various manufacturers. But not all of them can claim to be a leading production company, like Sibenergotherm.

It produces the Prometheus solid fuel boiler with a power of up to 45 kW. Which can be used for heating even production workshops up to 450 m² in size.

The main type of fuel for them is coal. But in comparison with other models, they are small in size, economical in wood consumption, and energy independent.

The range of such devices is equipped with a volumetric loading chamber, which ensures long-term operation. Made of steel with anti-corrosion treatment, the Prometheus solid fuel boiler has reviews that speak of its reliability and efficiency.

A functional feature of the device is the significant external area of the heat exchanger, which is encircled by hot exhaust gases and flame, which guarantees high heat transfer and makes it possible to achieve high efficiency. Thermal insulation of the front walls of the boiler also contributes to an increase in this indicator.

Loading firewood is done manually, and while the lower logs are burning, the upper layers dry out, which also increases efficiency. For ignition, the combustion damper opens, which leads to increased draft. It is closed after the combustion chamber has warmed up, and then the boiler operates as usual.

The ash drawer has a convenient design and can be easily removed, which greatly simplifies its cleaning. The device also includes the necessary accessories for this:

Poker
Scoop

The use of only high-quality materials in the manufacture of the device has significantly increased its service life. Its heat exchanger is made of boiler steel, and in areas exposed to the greatest heating, there is a refractory brick that can withstand up to 1800º C. This prevents the walls of the heat exchanger from burning out.

The device control system does not depend on electricity. It is equipped with a thermostat that controls the degree of opening of the damper. The presence of branch pipes on both lines allows the device to be used in various heating systems. And ease of operation makes it possible to use industrial solid fuel boilers in the most remote villages.

Advantages and disadvantages

Advantages of the boilers under consideration:

high efficiency exceeding 90%;
accessible and fairly cheap fuel;
ease of installation, management and operation;
almost complete combustion of combustion products;
increased durability;
affordable price.

Some disadvantages of TKDG should also be noted:

the need for a separate room for installation;
the need for periodic ash removal;
arrangement of a storage facility for fuel supplies.

In budget designs, fuel is loaded manually, which can also be attributed to the disadvantages of such equipment.

Zota

Zota solid fuel boilers are produced in Krasnoyarsk. The products of the Krasnoyarsk plant are familiar to customers with brands such as Dymok and Zota Mix.

They have proven themselves well and users speak well of the quality of operation of such devices.

Fuel loading in these units can be carried out both vertically and horizontally, and they also have a power control panel.

Solid fuel boilers ZOTA "Dymok-M"

Main advantages:

high efficiency - up to 80%;
efficiency;
you can change the fuel;
equipped with electrical control of combustion temperature and power;
high quality;
affordable price.

All of the above advantages of the functioning of Zota boilers characterize the products of this company only on the positive side.

Water circuit

To ensure autonomous hot water supply, in addition to the heating system, TKDG with a water circuit or double-circuit boilers are installed. Such units have 2 independent circuits for water circulation. An additional heat exchanger acts as a boiler and is intended only for heating water.

If the TKDG is connected to the water supply network, then water circulation through both circuits is ensured without forced supply, i.e. due to pressure in the water supply. When there is no centralized coolant supply, a storage tank is needed. It contains the necessary supply of water to meet demand.

The tank is usually installed above the boiler. A number of unit models have a built-in expansion tank. Forced water supply is provided by a circulation pump.

Protherm Beaver 20 DLO

This boiler is equipped with a spacious combustion chamber and a cast iron heat exchanger. Used for industrial and residential premises with an area of up to 200 sq.m. Allows you to connect a boiler. The warranty period is 10 years. The externally attractive body is covered with heat-resistant, red enamel. Works on wood and coal. The unit is equipped with:

Built-in sensors on the body;
Pressure gauge to control water heating;
A thermomechanical power regulator that determines the water heating temperature and adjusts the air supply;
A chimney damper that allows boiler inspection.

Can maintain stable temperature conditions. Has class 1 for efficiency and emissions. Among the advantages are operational efficiency, low heat losses, good efficiency, and wear resistance. Among the disadvantages, users highlight the specifics of traction control and cleaning.

Installation, maintenance and repair of the boiler must only be carried out by specialists!

How is the boiler power selected?

Accurate calculation of the required boiler power for heating a house is quite complicated. A simple technique is usually used: to heat an area of 10 m2, 1 kW of thermal energy is needed.

For unforeseen cases, a reserve of 10-15% of power is created. When using a water circuit or installing an additional boiler, additional energy of about 25-30% is required.

Climatic conditions make their own adjustments. In cold regions, where the air temperature can drop below minus 30 degrees, TKDG is selected at the rate of 1.6-2 kW per 10 m2 of room area. For the southern regions of the country, the requirement can be reduced: 0.8-0.9 kW per 10 m2.

What to consider?

Every major manufacturer of heating equipment, from the Russian Zota to the German Buderus, has in its arsenal several models of solid fuel boilers.
Visually, they may be practically indistinguishable from each other, but the devil is in the details. To avoid being among the victims of unscrupulous sellers, we suggest that you familiarize yourself with the table below. Here you will find the main characteristics to consider when choosing the heart of your heating system. As a small note: we are considering only classic boiler designs that run on solid fuel. Read separately about pyrolysis models. Main selection criteria

Characteristic	Meaning	Note
Thermal power, kW	on average for household needs - from 10 to 50	In the simplest calculations, it is assumed that heating 10 m² requires 1 kW of heat*. Manufacturers often indicate different power values for lighting with coal and wood, because the specific calorific value of these types of fuel is different. If the coal is of high quality, it provides more energy.
Efficiency, %	up to 92, but on average – 75-85	The higher the efficiency, the more efficiently the heat of combustion of the fuel is used, and the lower its consumption. The value depends on the design of the heat exchanger, including the area of the jacket through which the coolant circulates.
Fuel	firewood	+ affordable; + clean fuel, unlike coal — strict requirements for humidity - up to 20% (wet wood burns worse, smokes worse, their use reduces the service life of the boiler); - requires a large covered area for storage
	coal, coke	+ provide more heat than wood; — calorific value depends on quality; - a dirty type of fuel compared to firewood
	universal	Works on any solid fuel. The cost is higher than for the above solutions.
Loading fuel	vertical	Loading fuel from above is typical for coal and universal units.
Loading fuel	frontal	Side loading is convenient when using firewood. Facilitates installation maintenance.
Heat exchanger material	steel	+ cheaper than cast iron; + lighter than cast iron; + easy maintenance — less resource; - cool down faster
Heat exchanger material	cast iron	+ durable; + retains heat longer - heavier and more expensive than steel boilers
Number of circuits	1	Single-circuit models heat water for the heating system, while double-circuit models also heat water for hot water supply.
Number of circuits	2
The combustion chamber	open	In an open chamber, natural draft is used, in a closed chamber, forced draft is used, using a fan. Air injection increases the efficiency of the system, but makes it energy dependent.
The combustion chamber	closed
Additional options	automation	Automated systems only require the user to add fuel and clean the boiler.
Additional options	cooling circuit	In conventional models, when the coolant temperature exceeds a safe threshold, the device is switched to smoldering mode - the access of air to the firebox is blocked. Because of this, the temperature may rise another 4-10 degrees by inertia, and the water will boil. The presence of a cooling circuit allows you to quickly adjust the temperature of the coolant.

* This is an approximate value for central Russia, provided that there are no obvious heat leaks in the house and all enclosing structures are reliably insulated. For southern latitudes the value decreases to 0.6-0.9 kW, while for northern latitudes it increases to 1.3-2 kW per 10 m².

The best manufacturers

It is recommended to choose TKDG only from proven, reliable manufacturers. These include:

: boilers of the Ochag series with power from 5 to 35 kW.
Krasnoyarsk Heating Equipment Plant : Zota, Dymok and Topol series.
SibEnergoTerm : boilers of the Prometheus brand with a power of up to 46 kW.
TeploDar : Cooper series.
Bosch (Germany). Supplies boilers for heating houses with an area of more than 500 m.
Buderus (Germany). The boilers operate on coal and pellets. Power – up to 30 kW.
Junkers (Germany). The most popular are TKDGs with a power of 25-35 kW.
Stropuva (Lithuania-Ukraine). TKGD series Buran with power up to 42 kW stand out.
"Logika" (Poland): boilers with a power of up to 220 kW.

Leading manufacturers are widely represented on the Russian market, which makes it possible to choose the optimal model for specific conditions.

Rating updated September 12, 2021.

Products of the Sibir company

These solid fuel boilers differ from other models in the presence of a steel hob, which allows them to be used not only for heating the room, but also for cooking. They can run on wood, coal and other types of solid fuel, have a power of up to 30 kW and are capable of heating private households and cottages.

A solid fuel boiler Siberia with a water circuit, presented in the form of a boiler, can provide residents with hot water.

Solid fuel boilers manufactured in Russia under the Siberia brand with a water circuit are also produced. The water in them is heated using electric heating elements, which can also be used in the process of cooking, both in independent mode and when burning fuel. The presence of a built-in thermostat in the heating element causes the boiler to turn on to maintain the required temperature.

Watch a video about the product:

The outer walls of the device have a polymer coating that protects it from rust and mechanical damage. The large combustion chamber allows the use of firewood up to 60 cm long, and coal can be loaded from above through cast iron burners. A thermometer is built into the boiler body, indicating the temperature of the coolant.

The advantages of this equipment also include:

Possibility of working on coal, briquettes and firewood
Small dimensions
It can be used with any chimney

Among the shortcomings, it is worth highlighting only the systematic cleaning of ash and control of the combustion process, with the need to periodically add fuel.

Due to its design features, the Siberia solid fuel boiler has good reviews and is the best option where there is no gas.

Teplodar Cooper Praktik 20

Teplodar is a single-circuit, universal device. Can work independently or in tandem with gas, liquid fuel or electric boilers. Connects to heating systems with forced or natural circulation. The power is enough for a room with an area of 120-200 sq.m. The compact design is lightweight. The firebox is inclined and allows you to conveniently load wood, peat briquettes or coal. At the top there is a pipe for releasing air. A protective convector is provided for additional heating. The built-in heating element has a power of 6 kW. It can be replaced with a more powerful unit. The combustion intensity is adjusted automatically. The Teplodar is equipped with a cast iron grate, a large ash box, and has a built-in thermometer. Supplied with poker and screw.

The kit does not include chimney components and a thermostat. They must be purchased separately.

Bosch Solid 2000 B SFU 12

This steel unit allows you to heat rooms up to 135 sq.m. Fine-grained coal or firewood is used as fuel. Features vertical loading. The combustion chamber is made of fireclay bricks, which allows efficient combustion of fuel. The combustion process is controlled by a mechanical draft regulator. There are control and measuring instruments on the front wall.

The model has many advantages, among which are low cost and convenient use. The non-volatile boiler can be operated when the electricity is turned off. Has protection against burns and injuries. Disadvantages include the device’s sensitivity to wet fuel and low combustion duration. Specifications are shown in the table below:

Power	13.5 kW
S heating	135 sq.m
Efficiency	84%
Fuel consumption	5.3 kg/h

Installation of the boiler has some features. The boiler room or furnace room must be dry and warm. It must be periodically ventilated or have constant access to fresh air. Installation of the boiler on uneven platforms is prohibited. Proper operation of the unit requires a horizontal, level surface that can easily support the weight of the unit. The chimney must be waterproof. Its length and cross-section must correspond to those specified in the technical data sheet of the boiler.

The device is mounted at a certain distance from the walls. Compliance with these conditions guarantees safety and reliability. In terms of price-quality ratio, Bosch is one of the top boilers. It effectively heats residential and non-residential premises. Can be used as backup heating in private sector areas.

Review of domestically produced boilers

The growth in demand for solid fuel boilers was facilitated by the development of pellet production in Russia. Pellet granules, made from pressed wood chips, are a cylinder with a diameter of 6 to 10 mm and a length of up to 30 mm.

Thanks to grinding and pressing (the press develops a pressure of up to 300 atm) of the source material, pellets with the same mass occupy a much smaller volume than conventional fuel and burn with virtually no residue. And the granular format of this fuel makes it possible to automatically supply it through screw and piston feeders. At the same time, the volumetric fuel consumption is so low that one refueling of a standard size bunker is enough for a whole week of operation of the unit.

Solid fuel boiler START

The most popular Russian-made pellet solid fuel heating boiler is manufactured. A characteristic “trick” of this manufacturer is the bright orange color of the body, for which people began to call the boiler “orange”. The unit is equipped with an electronic control system and is even equipped with a display that displays information about the operating mode and condition of the boiler.
Start boilers are also designed for the use of pellets, but the design of these units allows the use of any other type of solid fuel. While other solid fuel boilers made in Russia are mostly loaded from above, in “Starts” the feeding conveyor is located horizontally. This design is more tolerant of fuel with an uneven fraction and can work with it stably, without blockages and jamming.
Boilers of the “Elephant” Trademark, which are also of domestic origin, have many advantages. The main one can be considered a surprisingly high efficiency - in the range of 95% - 97%. This efficiency was achieved thanks to the special design of the firebox and the surrounding water jacket. The service life declared by the manufacturer is 25 years.
Russian-made pyrolysis boilers, also called gas generator or long-burning boilers, are also well represented on the market. Given the limited scope of the article, we will only talk about a few brands.

How to choose a solid fuel boiler

A solid fuel, floor-mounted or wall-mounted boiler is an effective way to create comfortable conditions in a private home. Wood and coal are cheaper than diesel, gas or electricity. Solid fuel boilers create heat no worse than gas boilers. When choosing, take into account the percentage of efficiency, type of fuel, heat exchanger material, its purpose, dependence on electricity, fuel supply and ignition. Boilers operate on wood, coal, briquettes, coke or peat. After the fuel has been used up, the unit is cleaned from coal ash - once a day, from briquettes - once a month. According to their purpose, boilers are divided into single- and double-circuit. The former are connected to the boiler, the latter are used for space heating and hot water supply. Solid fuel boilers are:

traditional;
pellet;
long burning;
pyrolysis.

Traditional ones are similar to a stove, equipped with a window for supplying fuel, a chimney and a firebox. The heart of such a furnace is the heat exchanger. It transfers thermal energy to the coolant. Heat exchangers are made of cast iron or steel.

Pellet stoves are equipped with a hopper and automatic fuel supply. Wood pellets are most often used. Pellet stoves do not require constant monitoring. They are easy to maintain. The duration of operation is limited by the dimensions of the fuel supply hopper. The front wall is equipped with instrumentation and automation. Long-burning stoves are distinguished by their air supply. The fuel burns only in the upper part of the boiler, the remaining part is consumed gradually.

Pyrolysis furnaces are multiphase. First, they dry the wood, then degassing and direct combustion occur. The fan regulates the direction of the fire. Oxygen is supplied on a constant basis. Combustible gases are completely oxidized. Such boilers have the highest percentage of efficiency. Fuel supply can be manual (firewood) or automatic (coal, pellets). If it is possible to purchase cheap fuel, it is recommended to buy a universal boiler. If you have free time, choose traditional ovens. Pyrolysis and long-burning units are suitable for large rooms. Before purchasing a boiler, you should pay attention to the draft in the chimney. If there is insufficient draft, it is better to consider models with additional ventilation.

Stropuva Mini S8

This wood-burning boiler is suitable for heating small houses, cottages and baths. Does not require a specially equipped room such as a furnace or boiler room. A small volume of fuel storage saves money. The burning period of one wood stack is 30 hours, and that of a briquette is 48 hours.

Structurally, the oven consists of two heat-insulated cylinders of different sizes. The coolant is heated between them. Inside the small cylinder there is a combustion zone. It is accessed through the cabinet door. Combustion occurs only in the upper part of the fuel fill. During its combustion, the air distributor smoothly moves down to the combustion center. The temperature of the coolant is controlled by a bi-thermal draft regulator, which does not require power supply and increases the efficiency of the furnace. The boiler operates autonomously, without additional electronics and automation.