TOP 10 best long-burning solid fuel boilers for home heating: 2024-2025 rating and review of models with a water circuit and wood

To provide heat in the house or at the dacha, its own, autonomous heating system is equipped all year round.

An effective source of thermal energy can be a long-burning solid fuel boiler (TKDG). It is able to work for a long time on one tab 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 solid fuel boilers for long burning 2024-2025

Solid fuel boilers of long burning are becoming indispensable in regions where it is not necessary to think about natural gas yet. They have proven to be very effective.

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

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

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

What to look for when choosing?

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

Type of fuel. 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 work without a new fuel load depends on it.
economy, 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 the combustion chamber, the method of loading (manual, automatic, semi-automatic), energy dependence, weight and dimensions.

The best solid fuel boilers with a water circuit

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

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

Stropuva S30 30 kV

Among the best models stands out TKDG Stropuva S30. The unit is able to heat a room with an area of 200-300 m².

Wood 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 floor execution. With significant dimensions, the boiler has an ergonomic design. An air distributor for firewood and pellets is provided.

There is a pressure retention valve up to 2 bar.

Specifications:

thermal power - 30 kW;
fuel capacity - 342 dm³;
burning time on one tab - 31 hours;
the volume of water in the boiler is 51 l;
Efficiency - not less than 85%;
water temperature - 75 degrees;
dimensions - diameter - 68 cm, height - 185 cm.
weight - 280 kg.

pros

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

Minuses

not designed for coal;
mechanical control;
no display.

In the budget category, this model 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 for heating rooms up to 80 m2². Fuel - firewood and wood briquettes.

It consists of 2 cylindrical chambers made of stainless steel. Top burning of fuel is provided. Air is supplied to the furnace through a telescopic pipe. Automatic adjustment of its supply is provided. The boiler supports cyclic operation. Mechanical control.

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

Specifications:

thermal power 8 kW;
burning time on one tab - 30 hours (48 hours - on briquettes);
Efficiency - not 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 case makes it difficult to wash;
loading difficulties.

For small houses and summer cottages, this model is ideal, which is what most consumers note.

Teplodar Kupper Expert 15

Teplodar Kupper Expert 15 is a Russian-made heating TKDG designed for premises area 100-150 m². Wood, briquettes and coal can be used as fuel.

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

The fuel loading door is protected by a stainless steel screen. The material of the heat exchanger is stainless steel. Management is mechanical. Installation - outdoor.

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 modes of operation;
adjustment of the heat carrier temperature in a wide range;
convenient cleaning;
affordable price.

Minuses

no built-in expansion tank;
volatility when using a heating element.

The model is popular because good balance between price and reliability.

Teplodar Kupper Expert 22

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

Structurally, the model is largely similar to the previous device. To maintain the temperature, a heating element with a power of 6 kW is installed. A long process is provided by upper combustion.

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

Technical specifications:

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

pros

the possibility of rapid heating;
a large area of a heated house;
availability of economy mode;
Ease of controls.

Minuses

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

Widespread use for heating large houses is explained by an affordable price with high quality.

ZOTA Carbon 50

One of the best TKDG 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 adjustment system ensures long-term fuel burning. The body is made of high-strength boiler steel. Top loading of coal and a three-way flue 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. Cleaning is facilitated by a movable grate.

Specifications:

thermal power - 50 kW;
fuel capacity - 87 dm³;
burning time on one tab - 30 hours;
the volume of water in the boiler is 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

no built-in pump;
increased price.

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

The best solid fuel boilers without a water circuit

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

Teplodar Kupper 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.

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

Loading convenience is increased by the inclined door and a special tray. 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. Mounting method - floor.

Specifications:

thermal power - 45 kW;
burning time on one tab - 24 hours;
Efficiency - not less than 75%;
water temperature - 95 degrees;
dimensions - 103x65x81.5 cm;
weight - 207 kg.

pros

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

Minuses

mechanical control;
volatility when installing a heating element;
no built-in expansion tank.

The boiler is designed for large houses, and in these conditions it shows itself very efficiently.

TermoKRoss TKR-08D

The TermoKRoss TKR-08D boiler receives many positive ratings. This is a single-circuit type unit with a firebox closed type. Combustion is carried out 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 firewood burns out. The chimney diameter is 160 mm. Overheating protection provided.

Specifications:

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

pros

compactness;
simplicity of design and management;
increased duration of work 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 a reasonable price.

Aremikas Candle 35 kW

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

It has a floor version. During combustion, only the surface layer of fuel up to 20 cm thick burns. Firewood and wood briquettes are used as fuel. Mechanical control.

The furnace has a cylindrical shape. The heat exchanger is made of stainless steel. An automatic draft regulator is provided 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 - not less than 80%;
water temperature - 90 degrees;
dimensions - diameter - 70 cm, height - 207 cm.
weight - 315 kg.

pros

significant thermal power;
the ability to connect a boiler;
large volume of the furnace;
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 up to 400 m². An external water heater can be connected.

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

Safety valve provides protection. 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;
the ability to connect to a cascade;
complete security.

Minuses

no expansion tank;
significant height of the unit;
increased cost.

Great opportunities for heating huge houses compensates for all the shortcomings.

Stropuva S15 15 kW

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

The design includes 2 steel cylinders, included in each other, with external thermal insulation. The heated coolant is directed in the space between the cylinders. Air is supplied through a telescopic tube. Fuel - firewood and wood briquettes.

Installation - floor. The parameters are regulated by a bi-thermal draft regulator. Mechanical control. It does not require electricity to work. The safety valve ensures complete safety.

Specifications:

thermal power - 15 kW;
burning time on one tab - 30 hours (48 hours - on briquettes);
Efficiency - not 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;
no expansion tank and built-in pump.

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

The principle of operation of the TKDG

Long-term combustion in the TKDG furnace can be provided in 2 ways:

Upper combustion principle. In the combustion chamber, the fuel does not burn, but smolders with limited access to oxygen. The cylindrical furnace is located in the upper part of the unit and has a cylindrical shape. The gas liberated during smoldering enters the afterburner chamber, where oxygen from the air is supplied 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. Here, too, active smoldering of the fuel occurs with limited access to oxygen. The combustible gas rises and reaches the second chamber, where, being enriched with oxygen, it burns out completely.

Thus, the duration of burning is provided by the two-chamber design of the unit, when the fuel slowly smolders in the furnace, and the released combustible gases burn out in the second chamber.

Advantages and disadvantages

Advantages of the considered boilers:

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

It should be noted some disadvantages of TKDG:

the need for a separate room for installation;
the need for periodic cleaning of ash;
Arrangement of a warehouse for fuel reserves.

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

Water circuit

To provide autonomous hot water supply, in addition to the heating system, TKDG with a water circuit or double-circuit boilers are installed. In such units, 2 independent circuits for water circulation are provided.An additional heat exchanger plays the role of a boiler and is intended only for heating water.

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

The tank is usually installed above the boiler. In some models of units, a built-in expansion tank is provided. Forced water supply is provided by a circulation pump.

How is the power of the boiler selected?

The exact 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% in capacity is created. When using a water circuit or installing an additional boiler, an additional energy of the order of 25-30% is required.

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

Top Producers

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

Company "Gazstroy": boilers of the Ochag series with power from 5 to 35 kW.
Krasnoyarsk Plant of Heating Equipment: Zota, Smoky and Poplar series.
SibEnergoTerm: Prometheus brand boilers with power up to 46 kW.
TeploDar: Cooper series.
Bosch (Germany). It supplies boilers for heating houses with an area of more than 500 m2.
Buderus (Germany). Boilers run on coal and pellets. Power - up to 30 kW.
Junkers (Germany). The most popular TKDG with a capacity of 25-35 kW.
Stropuva (Lithuania-Ukraine). TKGD of the Buran series with a power of up to 42 kW stand out.
"Logics" (Poland): boilers up to 220 kW.

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

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