Long-burning solid fuel boilers: scope of application, advantages and disadvantages, reviews

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The ever-increasing cost of gas heating equipment leads to the fact that solid fuel boilers are gaining more and more popularity. And the lack of gas in small settlements leaves consumers with no alternative at all. Of course, the easiest way is to build a classic brick stove in your house and heat it daily. But if you don’t want to work as a fireman all winter, our article is for you. For those who have decided to make their life significantly easier, and even save on heating their home, we have compiled a rating of the best solid fuel boilers of 2021.

However, before moving on to discussing specific models, let's talk a little about how to choose a solid fuel boiler and what indicators you should pay attention to.

Description of design

As a rule, long-burning boilers are not used for heating water , that is, they are mainly made single-circuit. They are used in systems with forced circulation of water media. Even if heating the water is possible, its temperature is no more than 80 degrees. The design is equipped with a control unit that allows you to regulate the intensity and performance of room heating. If an emergency occurs, the regulator will signal about it.

Advantages and disadvantages

Among the main advantages are the following:

ease of maintenance;
affordable cost of equipment and fuel;
positive reviews;
autonomy;
possibility of choosing different types of fuel;
environmental cleanliness;
excellent efficiency;
intuitive controls;
safety.

Heating a private house with a solid fuel heater, especially an automatic one, does not require large amounts of time spent servicing the equipment. It is enough to add fuel once every couple of hours (and probably even a day).

The disadvantages can probably be attributed to the fact that the entire heating procedure is a kind of vicious circle: loading fuel, ignition, combustion, extinction, cleaning.
We also note that most models are very sensitive to the quality of fuel and barely regulate the temperature.
Due to the fact that solid fuel devices have recently gone through many stages of improvement, they have become very economical and quite effective, which is the reason for their increase in popularity. There are also automatic long-burning boilers. Modern equipment can operate with a one-time load from 5 to 36 hours. The size of the firewood used has also changed. Now it is possible to load firewood up to 1 meter long and up to 20 cm thick. Such a large fuel size saves material and time costs during procurement.

In order to most accurately understand what we are talking about, we will describe the technical data of one of the devices - KT-2E (made in Ukraine):

heating area - 250 sq. m;
power - 25 kW;
loading chamber volume - 62 cubic meters. m;
fuel capacity - 56 kg;
burning time on one tab is around 8-46 hours (this depends on the type of fuel);
firewood size - 46 cm;
dimensions of the loading opening - 230x370 mm;
water in the boiler - 117 l;
Efficiency - 83%;
chimney size - 170 x 170 mm;
water pressure - no more than 3 bar;

Prices: summary table

Price rating of long-burning coal boilers (table):

Long burning coal boiler model	Cost, rub.
Stropuva S15U	85 400–90 560
Heiztechnik Q Alfa 15	62 240–68 720
Buderus Logano S181-15E	218 000–250 640
WEEK KO-60	115 900–130 500
TIS (TIS) PRO 11	64 100–67 200
LIEPSNELE L20U	81 500–99 770
VIADRUS Hercules U22D	126 600 –128 530
Galmet CARBO 21	103 890–116 750

Principle of operation

Solid fuel boilers consist of the following parts:

heat exchanger;
fan;
fuel bunker;
combustion chambers;
smoke exhauster.

Solid fuel is placed inside the bunker and set on fire.
Limited air and high temperature create the formation of pyrolysis gas. The resulting gas enters the combustion chamber of the boiler through ceramic nozzles, where it interacts with secondary air. In the chamber, the gas burns completely, and CO2 is formed. High-temperature gases that exit the combustion chamber enter the heat exchanger and then into the chimney. In this case, the fan creates an air flow that blows across the heat exchanger. Then the heated air enters the grilles, which are located inside the heat generator or through a ventilation duct system connected to it. According to this scheme, the air in the room is heated. With the help of an electronic unit, the air temperature at the exit is in the region of 50-110 degrees. With approximately one load, a heat generator can operate for 6-9 hours, but these figures can vary significantly depending on the manufacturer. We must not forget, in order to preserve the walls of the combustion chamber, it is not advisable to allow the device to operate in critical mode if the temperature is more than 110 degrees.

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

Types of solid fuel boilers

Solid fuel boilers can use various substances. By type of fuel they are divided into:

who use firewood - any trees will do (birch, oak, maple, alder, ash). In this case, it is necessary to take into account the calorie content , since the higher it is, the longer the wood burns. For combustion, it is best to use wood with a moisture content of no higher than 25%;
who use coal - coal of any fraction and class is suitable. It is advisable to choose coal with a calorie content of no more than 7000 kcal per kilogram. Burning a kilogram of coal with a calorific value of 7000 kcal, the result is 8.15 kW/h, and this figure is close to what natural gas creates;
pyrolysis - work on wood, molecularly decomposing the wood during combustion at elevated temperatures. The wood must be dried for at least a year before burning;
that use pellets - you can use any pellets (straw, sunflower husk, wood). This is the most profitable type of fuel. Pellets are characterized by low ash content and high calorie content. Devices that run on pellets are, according to reviews, some of the most popular today due to their advantages;
universal - used on all different types of fuel.

In addition, depending on the type of fuel, they can be divided into those where manual loading and automatic feeding are carried out using a piston or auger.

TOP 5 solid fuel boilers wood/coal

If you don’t want to be bothered by the issue of fuel procurement and plan to heat with whatever you have, you should pay attention to the “omnivorous” models. Such heating devices can operate on both wood and coal. Moreover, many of them are able to work on solid household waste. It's wonderful and useful to burn anything in them. In this case, in addition to heating the room, the problem of recycling household waste is well solved.

Bosch Solid 2000 BK 16-1

Quite easy to maintain and “omnivorous” model. The high-quality steel body and cast iron grates ensure reliability and durability. If the area of your home is no more than 150–160 square meters. meters, Bosch Solid 2000 BK 16-1 is what you need. In the middle price category, such a boiler can be considered one of the best offers of 2021–2021.

Advantages:

large selection of fuel types;
the ability to clean the boiler through the top;
reliability;
automatic power control;
interesting design;
the ability to use in tandem with a gas boiler as a reserve;
affordable price, no more than 750 US dollars.

Flaws:

no special ones were found.

See also -

How to choose a solid fuel boiler for heating a private house

Protherm Beaver 20 DLO

Here is another fairly high-quality model that can perfectly heat a room of no more than 170 square meters. “Proterm Bober” is capable of working both on medium-sized coal and on firewood.

Pros:

high work efficiency;
efficiency;
high efficiency (up to 90%);
cast iron firebox and heat exchanger;
the ability to use the boiler as auxiliary equipment;
ability to work on one load for up to 12 hours;
cost about $800.

Minuses:

the moisture content of the firewood should not exceed 20%;
unusual traction adjustment;
not very convenient to clean, you need to adapt;
weight is greater than that of similar models.

Buderus Logano G221-25

A very interesting model, the power of which is enough to heat 200 square meters. meters of area. The cast iron body provides exceptional reliability and high fire safety.

Advantages:

increased resistance to corrosion;
increased dimensions of the firebox;
ease of operation;
Efficiency is about 75–77%;
minimum time to warm up the room;
spacious receiving hopper.

Flaws:

quite high cost, approximately 1300 USD;
considerable weight.

Burzhuy-K Modern-24

This modern and stylish heating device can operate without refueling for several hours (depending on the type of fuel). Moreover, you can use anything to generate heat. The fuel in this case can be coal, firewood, wood waste and fuel briquettes. Moreover, depending on the type of fuel used, an efficiency of more than 90% can be achieved.

Pros:

heated area up to 250 m2;
compact dimensions;
the ability to use firewood with humidity up to 50%;
Efficiency up to 92%;
economical use of fuel;
complete independence from electricity;
consumption is less than 40 kg of firewood per day.

Minuses:

the need to install a pipe of sufficient height (at least 8 m) for high-quality removal of combustion products;
grate bars quickly burn out and require replacement;
in some models the gate clogs quickly;
price approximately 1,300 US dollars.

Alpine Air Solidplus 4

If you want to enter the boiler room as rarely as possible, but the room itself where the fuel equipment is installed is not very well insulated, this boiler is exactly what you need. Despite its not very sophisticated design, this unit is capable of operating on almost any type of solid fuel and quite effectively heating a room of up to 200 m2.

Advantages:

affordable price, about $800;
reliable and unpretentious;
high efficiency;
excellent thermal insulation.

Flaws:

very original design.

Reviews of solid fuel boilers

Many people have been using these devices for years and they know exactly about all the advantages and disadvantages.
Therefore, before buying a solid fuel boiler, it would be good to consult with someone just to find out consumer feedback. According to our statistics, the owners of these boilers say that it is necessary to carefully select fuel, find out what kind of fuel is available in your case, determine how much it burns and how much energy it produces, and then compare it with the cost of them and select the most profitable type of equipment . In this case, you need to carefully take care of the exhaust system, because sometimes some of the heat simply flies into the air. The overall result suits everyone. Users in our country, as a rule, burn wood; they are harvested from the beginning of summer and sometimes until the end of autumn. Many of the consumers in their reviews recommend choosing birch , because when it burns, the largest amount of heat is generated, which is the advantage. Here are reviews on whether it is worth buying a solid fuel boiler.

Is it worth buying a solid fuel boiler?

If it is not possible to connect gas, yes.

Is a solid fuel boiler profitable?

Much cheaper than electric.

How often do you need to add firewood to a solid fuel boiler?

Maximum twice a day.

A question of cost

The cost range for solid fuel boilers is very large. The cost depends on how much area will need to be heated, but the manufacturer is even more important.

So we can buy a domestically produced Ogonyok KOTV device for 15 thousand rubles, while the Polish SAS ECO will cost much more, about 160 thousand rubles. Boilers made in Turkey by Caldera and Germany by Roda are in excellent demand, the cost of which will also not greatly please the consumer. But, not forgetting about saving in the future, you need to think carefully.

Exploitation

Judging by the reviews, operation does not create any issues. Apart from downloading after a certain time, the rest does not require much labor. Due to the well-thought-out design, cleaning from combustion products and raw materials is quite simple. The owner of the house only needs to load fuel into the fuel container, light it and set the desired temperature (when installing a temperature control device). Then you can enjoy the comfort and warmth of your home , only breaking away from time to time to refuel.

How to choose a solid fuel boiler?

Most people associate solid fuel devices with the stoves that once heated the entire country. With the creation of electric and gas boilers, the popularity of solid fuel heating systems has greatly decreased. It was believed that a heating boiler using solid fuel - peat, coal or wood - was more difficult to operate and needed constant monitoring. In some ways this was true. A classic solid fuel boiler has a small firebox and to heat your home you need to add fuel 6-8 times.
This is actually quite a big drawback, in contrast to gas devices running on liquefied or main gas. Another disadvantage is the need for high-quality fuel. This was especially true for gas generator or pyrolysis boilers, which are quite sensitive to fuel moisture. Such disadvantages, or more specifically features, must be taken into account when choosing a heating boiler.

And now about the advantages of solid fuel boilers.

Solid fuel boilers are safer, unlike electric and gas ones, since there is always a danger of gas explosion and leaks, not even in the boilers themselves, which have an increased degree of protection, but usual in the gas supply system.

These boilers are economical - you can buy firewood in places far from the city quite cheaply, and the design of today's devices is such that they have a fairly good efficiency.

Environmental friendliness - today in solid fuel boilers the fuel burns completely , leaving a little ash, which, as a rule, serves as fertilizer, although little of it is obtained.

We mentioned above that heating requires 6-8 refuelings daily. In fact, modern boilers now operate on one refill for up to 36 hours, which significantly increases their attractiveness to buyers.

And the main thing is convenience, durability and unpretentiousness - it is now quite expensive to install gas into a house, and using electricity for heating is also not cheap. Choosing liquefied gas can be inconvenient and it may not be easily and quickly delivered to every area. Often a solid fuel boiler is the best option , and sometimes the only one. As already described, you can choose any fuel for heating - coal, firewood, briquettes, coke, European firewood, and so on.

TOP 5 long-burning boilers

And of course, we cannot ignore long-burning solid fuel boilers. User reviews suggest that such equipment can burn on one refill for up to 130 hours. If we consider all such equipment as a whole, we can note only one significant drawback: long-burning boilers cannot be refueled. That is, adding firewood/coal during the combustion process will not work. You need to wait until the fuel burns out completely and only then load the boiler again. Here are some of the best models for 2021-2021.

Stropuva S 40

The leaders among long-burning solid fuel boilers are, of course, models of the Lithuanian brand Stropuva. This brand is capable of providing excellent heating of a room up to 400 m2 for 60–70 hours. And all this at one gas station. In this case, anything can serve as fuel. Only the duration of combustion depends on this.

Pros:

amazingly high efficiency;
market leader;
power and stable operation for several days;
stylish design.

Minuses:

It is quite difficult to perform the correct binding;
labor-intensive cleaning and loading;
inability to “throw in” fuel.
high price, from $2,000.

Candle S-18kW

This solid fuel boiler is capable of operating on one load of firewood for at least 7–8 hours. And with proper installation, the operating time can reach 33–34 hours. The principle here is simple: the denser the fuel is packed, the longer the boiler will burn.

Advantages:

efficiency and energy independence;
compactness;
quite high efficiency;
power.

Flaws:

the need to equip a boiler room (separate room) for installation;
fast caking of ash;
high requirements for fuel dryness;
considerable cost, approximately $1,500.

Buderus Logano G221-40

A wonderful model with a heat exchanger made of cast iron. Capable of heating a room of about 400 square meters. meters. It is quite “omnivorous”; coal, various types of wood, peat, coke, and fuel briquettes can be used as fuel.

Pros:

the ability to use both autonomously and in tandem with boilers of other modifications (diesel, gas);
interesting design;
power and energy independence.

Minuses:

you need coal of a certain fraction, larger ones may get stuck;
price about 1,800 US dollars.

Idmar UKS

A universal boiler that can operate on absolutely any type of solid fuel, including any flammable waste. A wide range of models allows you to select heating equipment that ideally matches the required power. Ideal for heating a cottage or small country house. For example, the Idmar UKS-17 model does an excellent job of heating an area of up to 170 square meters. meters.

Advantages:

heat exchanger alloyed with molybdenum, increased protection against deformation and corrosion;
water-cooled grate;
the presence of a three-channel gas duct;
simplicity and ease of maintenance;
insulating the outer casing with a thick layer of basalt wool significantly reduces heat loss;
heat exchanger “water shelves”;
affordable price, from $400.

Flaws:

continuous burning period is no more than 24 hours (on coal).

WICHLACZ GK-1

A high-quality analogue of the previous brand, which was appreciated by many consumers. It can work for at least two days at one gas station, and you can literally heat it with anything.

Pros:

“wet” grate bars;
Efficiency up to 89%;
The presence of a rotating chimney greatly simplifies installation.

Minuses:

duration of work (continuous) no more than a day.

This is how our rating of the best solid fuel boilers of 2021 turned out. As you may have noticed, we did not try to place the models on a “podium” and did not award any places. You can do this yourself. You can also add other models to consideration. You decide.

Types of heating boilers

There are two types of boilers:

with manual loading;
with automatic loading.

Manual loading boilers

As a rule, long-burning boilers from BuderusLogano are recommended.
The choice of this particular brand is due to the excellent quality of production, ease of operation and reliability. Long-burning boilers BuderusLogano G221 are manufactured in a number of modifications with a power of 25-50 kW. This is the best option for heating a country house or a small industrial premises. This boiler runs on briquettes, wood or coal. This is a traditional cast-iron heating boiler, the combustion duration of which is ensured by the volumetric loading chamber and modern technologies used in the manufacture of this device.

Automatic pellet boilers

This is a type of boiler that runs on granular fuel - pellets. These devices are absolutely unpretentious in operation , but they are energy dependent and need to be connected to electricity for the device’s automation to operate.

TOP 5 pellet boilers

If you still don’t know which solid fuel boiler is best to purchase for heating your home, we strongly advise you to take a closer look at pellet heating devices. Installing such a unit will allow you not to look into the boiler room at all for several days. There can be only two difficulties here:

you need to have enough places to store pellets;
Such fuel material is not available in every region.

If you don’t foresee any difficulties with purchasing and storing pellets, such a boiler will definitely allow you to appear in the furnace room as little as possible.

Zota Pellet 25

One of the most popular and expensive devices is the ZotaPellet boiler. This cutting-edge unit is equipped with a liquid crystal display and is capable of controlling as many as five pumps simultaneously. Literally everything can be connected here - from underfloor heating to a centralized heating system. A power of 25 kW is quite enough for high-quality heating of a house with an area of at least 250 m2.

Pros:

Efficiency more than 90%;
electric ignition;
high energy efficiency;
reliable automation;
high-quality thermal insulation;
multifunctionality.

Minuses:

considerable cost, about 3300 USD. e.

Biomaster BM-15

Here is another high-quality boiler that runs on pellets. This model is good for heating a large house. Depending on the configuration, it may have a loading hopper of 200 or 400 liters. Equipped with an automatic ash removal system.

Advantages:

absolutely not demanding on the quality of the pellets used;
good efficiency;
efficiency;
ease of installation and comfort of use.

Flaws:

cost from $2,800;
has a lot of weight;
requires a foundation.

Teplodar Kupper OK 30

And this unit is generally “omnivorous”. Teplodar Cooper, although it has much fewer bells and whistles, is absolutely not demanding on the quality and type of fuel. Compact dimensions allow you to comfortably place fuel equipment on an area of about 5 square meters. meters.

Pros:

Efficiency over 89%;
high-quality thermal insulation;
compact dimensions;
variety of fuels;
automatic fuel supply;
automatic adjustment of t˚C mode;
ease of operation;
low price, from $600.

Minuses:

difficult to install on your own, requires the involvement of a specialist.

Pelletron

There are only 2 modifications of boilers from this company: 40 and 20 kW, which allows you to perfectly heat rooms up to 700 or 400 m2, respectively. The cost of Pelletron pellet boilers can reach 1,500 conventional units, depending on the power.

Advantages:

Efficiency up to 92%;
compact dimensions;
light weight;
equipped with a smoke exhaust system, which allows you to do without chimney equipment;
has automatic protection against fire or overheating.

Flaws:

has inflated requirements for the quality and size of pellets;
If installed and used incorrectly, fire may spread into the bunker.

Kiturami KRP 20-A

An interesting model of a pellet boiler - it can provide not only heating of the room, but also additional provision of hot water to the home.

Pros:

auto-dosing of fuel;
presence of a thermostat;
possibility of heating water;
ease and accessibility of cleaning the ash pan;
ease of installation;
spacious fuel bunker;
Automatic protection against freezing or overheating.

Minuses:

price, about 3,500 US dollars.