Stropuva boiler with your own hands

Want to stay warm in your house during the winter without going over budget? Perhaps a Stropuva boiler is the answer you’ve been searching for. This cutting-edge heating system is an appealing choice for homeowners looking to upgrade their heating systems because it is both economical and efficient. Additionally, you can construct one yourself to save money on installation and obtain a better understanding of how your house heats.

What precisely is a Stropuva boiler then? Put simply, it’s a kind of solid fuel boiler made to burn biomass of all kinds, including peat, wood chips, and pellets. Its name comes from Lithuania, where it was first popularized many years ago. The efficacy and simplicity of the Stropuva boiler are what make it so beautiful. Utilizing renewable energy sources, it provides a sustainable substitute for conventional fossil fuel-based heating systems.

Although it might seem difficult at first, building your own Stropuva boiler is a manageable project with the correct advice. Building a Stropuva boiler can be a satisfying project, regardless of your level of experience with do-it-yourself projects. All you need to build a heating system that not only keeps your house warm but also lowers your carbon footprint are some easily accessible materials and simple tools.

Being able to tailor a DIY Stropuva boiler to your unique requirements and tastes is one of its main benefits. You can customize your boiler to optimize efficiency and performance by changing its size, capacity, and combustion process. Additionally, building it yourself gives you important insights into how it works, which will simplify maintenance and troubleshooting in the future.

We’ll take you step-by-step through the construction of a Stropuva boiler in this post, covering everything from material selection to making sure all safety precautions are taken. Starting this do-it-yourself project can be gratifying and useful, regardless of your motivations—saving money, protecting the environment, or just the joy of making something yourself. Prepare to take charge of your home’s heating and enjoy the coziness and warmth that come with building your own Stropuva boiler.

Materials Needed	Step-by-Step Instructions
Metal barrel or tank	1. Obtain a metal barrel or tank that will serve as the body of the boiler.
Insulation material (e.g., rockwool)	2. Insulate the barrel or tank using insulation material to prevent heat loss.
Fire grate	3. Install a fire grate at the bottom of the barrel or tank to hold the fuel.
Ash pan	4. Create an ash pan beneath the fire grate to collect ash and debris.
Chimney pipe	5. Attach a chimney pipe to the top of the barrel or tank to release smoke and gases.
Door with hinges	6. Cut a door into the side of the barrel or tank and attach it with hinges for easy access.
Air vents	7. Drill holes near the bottom and top of the barrel or tank to allow air to flow for combustion.

Our guide on home insulation and heating covers a variety of strategies for effectively maintaining a warm home. We cover a number of important topics, including how to install a Stropuva boiler—a well-liked option for do-it-yourselfers. Installing a Stropuva boiler can be a rewarding project if you follow the directions carefully and have a basic understanding of plumbing and heating systems. We cover all the necessary steps to enable you to install and use your Stropuva boiler with confidence, from choosing the ideal location to making sure there is enough ventilation. With this doable DIY solution, you can enjoy a cozy home while saving money on heating expenses.

Manufacturing of Stropuva boiler

Thick-walled metal products are not required in the production of this kind of furnace. Thus, we’ll start with a standard metal two-hundred-liter barrel. It will be perfect if you can find a barrel made in the Soviet style.

Apart from the barrel, you will require:

4 510 DEFORT DWM-161.

• Metal sheet with thickness of 4 mm – we will make a load from it.
• 100 mm diameter pipe for making a spigot for the chimney and a pipe for supplying fresh air to the combustion zone.
• 6 mm thick wire or a few angles for making a grate.
• The channels for weighting the load.

Among the instruments required are:

• welding machine;
• bolgar;
• hammer
• chisel;
• tape measure.

Additional materials needed are asbestos cord and fiberglass.

You must be able to operate a welding machine, as it is used. Without it, solid fuel boiler Stropuva cannot be produced by hand.

Boiler design

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• Air flap
• Bi-thermal draught regulator
• Support rod
• Air heating chamber
• Diverting gases opening
• Air supply opening
• Air supply pipe
• Wood stoking door
• Air distributor
• Fuel
• Heat removal door
• Cable with a ring for lifting the air distributor
• hook
• Heat transfer pipe
• Heat return pipe
• Socket for thermometer
• Coupling for pressure saving valve 1.5 bar
• Concrete floor
• Air supply regulator from below

Structurally, the Stropuva boiler is two steel cylinders, one inside the other, with an outer layer of thermal insulation. The heated thermal fluid is located in the space between the cylinders. Inside the small diameter cylinder there is a combustion zone, which is serviced through the doors and in the boiler drum. The combustion process in the boiler takes place only in the upper layer of the fuel deposit . Heated air from a special air heating chamber is fed into this fuel layer through a telescopic pipe with an air distributor . In the process of fuel combustion, the air distributor and the telescopic tube, under their own weight, are gradually lowered downwards, pushing the combustion products to the boiler base. Thus, the air distributor is always on the upper, burning layer of fuel, namely – in the center of the combustion zone. The hearth of fuel combustion, as it burns, moves from the top to the bottom of the furnace. In the process of fuel combustion, the air distributor and telescopic tube, under their own weight gradually descend downward, pushing the products of combustion to the base of the boiler. Thus, the air distributor is always located on the upper, burning layer of fuel, namely in the center of the combustion zone. The combustion hearth of the fuel, as it burns, moves from the top to the bottom of the furnace. Structurally, the Stropuva boiler is two steel cylinders, one inside the other, with an external layer of thermal insulation. The heated coolant is located in the space between the cylinders.

Advantages and features of long combustion designs

The presence of two simultaneous working chambers sets analogs for long combustion apart from conventional boilers. The fuel that is directly deposited is burned in the first one, and the released gases are burned in the second. The timely provision of oxygen is crucial. An air blower can be made out of a regular fan and some basic automation.

The primary components of continuous combustion boiler heating

Of the units’ merits, the following should be mentioned:

• minimum number of fuel deposits;
• high efficiency of operation;
• use of different types of solid fuel;
• small amount of soot in the pipes during operation;
• design reliability.

The modern model’s operating principle

Note: The intricacy of independent manufacture must be mentioned in addition to the drawbacks. Even so, the unit is realistically created using pre-made drawings of long combustion created by hand.

Principle of operation

After the fuel is loaded, sawdust or chips for ignition are put on top, and the combustible liquid is poured over the top. This is then ignited and, after making sure the fire is burning, the top door is closed. Under the action of the draught formed by the chimney, the fire is ignited and ignites the upper part of the fuel. Due to the supply of air directly to the combustion area, the firewood is quickly ignited by even a small amount of kindling. Fire and smoke, passing under the pancake, escape through the space between it and the inner casing, after which they rush to the smoke hole. Part of the glowing gases move up and fill the upper part of the combustion chamber, heating the metal and water, then, as they cool down, gently descend and go into the smoke hole.

The duct pancake descends as the fuel burns, expanding the area above it. As a result, an afterburning chamber is created, where free air and unburned gases mix to raise the temperature. As a result, efficiency rises by 1-3 percent. The protection in the form of a bimetallic plate, which bends after heating to a specific temperature, is activated when the fire flares up too much. Both the air supply and the burning intensity are decreased by this plate. The plate straightens and opens the air damper when the temperature falls below the predetermined point, boosting the combustion temperature and creating more draft.

Pros of solid fuel boilers Stropuva

Stropuva is primarily about cost savings. The fuel burns extremely slowly during this process. It will last for up to thirty hours if you use firewood and arrange it properly. You can keep the room at that temperature for two days if you use fuel briquettes. The coal stoker is thought to be the most effective in its turn. The house can be heated by it for up to five days.

Consider the high efficiency factor in this instance as well. In some circumstances, this indicator rises to 90%, indicating that the "Stropuva" boilers are extremely productive. It is also important to note how simple it is to use these devices. It is not necessary to invite specialists for them to operate successfully. The boiler ash needs only to be cleaned out on a regular basis. Manufacturers recommend doing this twice a week at the very least. The EU quality certificate was granted to the company "Stropuva" in 2005 in recognition of their accomplishments in the heating systems field.

Disadvantages of solid fuel boilers

The main disadvantage of this type of boiler high price. After all, not everyone will pay for a TT boiler 80-130 thousand rubles, not counting the cost of the chimney and TA. For comparison, an inexpensive TT boiler, working on wood, complete with a TA volume of 5 m³ (steel barrel, insulated with foam or mineral wool) will cost 50 thousand rubles (10-15 thousand boiler and up to 35 thousand TA). In addition, Stropuva boilers are very sensitive to the temperature of the heat transfer medium coming through the return pipe. If the temperature drops below 55 degrees, the efficiency of the boiler falls sharply. Prolonged combustion of wood at lack of air (fuel saving mode) leads to the appearance of aggressive condensate on the inner surface of the boiler. This condensate corrodes the metal, and after drying forms a crust, reducing the transfer of heat energy and boiler efficiency by 5-15 %.

Besides, the boiler works well only on dry firewood with humidity not exceeding 15 %. Wet wood forms thick smoke and condensate, which settles on the walls of the boiler. Another significant disadvantage of Stropuva – a large amount of ash. When the pancake has traveled 4/5 of the distance, the fuel turns out to be heavily diluted with ash, due to which the combustion temperature decreases. Therefore well Stropuva works only on dry firewood, even pellets, not to mention coal, do not burn completely, leaving a layer 10-15 cm thick, where the fuel is abundantly mixed with ash. Despite the fact that many companies offer Stropuva boiler running on coal, the use of coal does not lead to anything good. After all, Russian and Ukrainian coals are characterized by high sinterability, so the top layer of coal (15-20 cm), burned, will turn into a sintered crust, which will not let the fire below.

In summary

Stropuva boilers have one major advantage over traditional TT boilers, despite their high cost and requirement for proper heating organization. When choosing the right amount of TA and Stropuva power, you can even lay firewood once a day—or even less frequently—during severe frosts. Furthermore, you won’t need to conceal the enormous heat accumulator tank because of the small TA capacity. The boiler Stropuva is a good option if you are not ashamed of the unit’s enormous cost (in comparison to traditional TT boilers) and high requirements for the efficient arrangement of the heating system.

Main models

You can purchase a Stropuva boiler from online retailers as well as specialty shops that represent the manufacturer. For the minimum power model, the price starts at sixty thousand rubles. Let’s describe the produced models to wrap up the review.

Stropuva Mini S8

The smallest wood boiler, with an 8 kW capacity and a design for rooms up to 80 square meters, is in front of us. It has a safety valve and thermometer and operates on firewood and wood briquettes. The coolant’s heating temperature ranges from +60 to +95 degrees Celsius. The circuit’s maximum pressure is 1.5 bar. The model’s efficiency is 85%, which is quite good for solid fuel equipment. This boiler is estimated to have cost 61 thousand rubles.

Stropuva Mini SP8

This boiler is different from the previous model in that it supports pellet work. In this mode, the fuel ignition system’s fan requires electricity to run, so it must be connected to the power grid at a voltage of 220 volts. The boiler operates independently while handling wood and briquettes. The similarity of other parameters is nearly 100%.

Stropuva S20

Among the most well-liked models. You can use it to heat up to 200 square kilometers of residential space. м. Because briquettes and regular firewood are the fuel sources, the boiler is constructed on a non-volatile scheme. Up to 31 hours can be burned. We suggest getting a modified Stropuva S20U if you want to put an end to fuel laying for a few days. It can burn coal continuously for up to 120 hours. The Stropuva S20P model has a three-hour maximum working time on pellets.

Stropuva S40

Out of the entire range, this boiler has the most power. It has a 40 kW heat capacity, can burn for up to 31 hours, and can heat an area up to 400 square meters. An impressive 58 liter water reservoir is housed in the appliance’s heat exchanger jacket. At an average temperature of +75 degrees Celsius, the system can reach a maximum pressure of up to 2 atmospheres. There is room in the appliance’s combustion chamber for up to 90 kg of firewood. There are also variations available for use with hard coal and pellets.

Other models and modifications available

Additionally available for purchase are solid fuel boilers with outputs of 15 and 30 kW from Stropuva. They have a maximum area of 150 and 300 square meters in mind. м. Every model taken into account in this review is offered in three different configurations:

• Basic – the equipment works only on firewood and fuel briquettes (eurorodrova).
• With index P – it is possible to work on pellets, burning up to 72 hours.
• With index U – units with the ability to work on hard coal, burning time up to 120 hours.

Naturally, depending on the fuel’s properties (kind of wood, level of dryness), the actual burning time may be shorter.

Some people have specifications for heating equipment’s design.

Good news if you’re concerned about the boiler’s appearance: Stropuva offers a variety of colors for their products. Yellow is the primary color and the most prevalent one.

Boilers in the following colors are available: brown, blue, red, green, and black. Additionally, spot coloring in the colors dirty green and yellow is offered.

The principle of operation of Stropuva boiler

When the flame is ignited enough, it will burn all the way through.

The boiler Stropuva’s original and analog versions operate on the same theory. The firebox needs to be full of bitterness to start. Note that since the smoldering source needs to be at the top, this can only be done after the boiler has burned through the previous fuel supply. In order to put the boiler into service, you must:

• pull the ring and lift the telescopic air duct;
• remove ash through the bottom door (1-2 times a week);
• Fill the firebox with wood or coal, depending on the model of the unit (there are wood and universal);
• from above, set fire to paper or cloth soaked in gasoline;
• lower the duct and close the doors.

The boiler can operate for slightly longer than a day on one load of firewood, up to two days on briquettes, and up to five days on coal.

The air distributor descends until it hits the bottom when the fuel runs out. A bimetallic plate controls the air supply. Because the Stropuva boiler device has an integrated air heating chamber, developers have increased efficiency. The latter is around 400 degrees Celsius when it enters the furnace. Pyrolysis gases ignite at this temperature. But regrettably, the plate loses its properties and needs to have the settings changed every month. After a year, a new plate needs to be installed.

You are able to prevent temperature spikes that happen when regular solid fuel boilers operate because the air supply is metered. As a result, the heating system’s "heat accumulator"—the method of strapping the boiler Stropuva without an accumulation tank.

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Device boiler Stropuva

The first step in determining your ability to build a Stropuva boiler by hand is to be honest about how skilled you are. Should you possess multitasking skills and advanced creativity, you may be able to manage the procedure. Given how tough the task is, it is unlikely that you will find any use if you are a "self-made" household. Let’s take a look at the Stropuva boiler design to confirm this. The following are its principal structural components:

• double casing;
• telescoping duct;
• air distributor;
• automatic air regulation system.

It goes without saying that Stropuva long-burning boilers have doors and spigots for the coolant supply and return. It won’t be hard to make the basic elements at home; however, the simpler ones are. First, let’s talk about how to make a telescopic tube. Without industrial machinery, this is not possible. In theory, you can now stop here and consider the attempt unsuccessful. Assume for the moment that you were able to create a telescopic duct that could be folded by pulling a cord.

You have to have noticed the ring on the rope in the Stropuva boilers, which burn for a long time. The air supply pipe is intended to be raised by it.

The unit’s layout is incredibly intricate. The actions listed below must be taken:

• Connect two pipes of different diameters;
• in the outer pipe cut spigots for the supply and return of the coolant;
• in the inner pipe at the top (exactly in the middle) to fix the chamber for heating the air;
• in the chamber at the bottom to fix the already made telescopic air duct with an air distributor at the end;
• it is also necessary to make a spigot for smoke output from the inner tube;
• install doors;
• install an air control system.

Everything needs to be as tight as it gets. able to complete a task that tough? The likelihood is that there isn’t. Mr. Afanasy Budyakin from Kolyma came up with an analog of the boiler Stropuva because he believed that the task was impossible. I simply put it online under the handle "bybafonja" without giving it any credit. Thus, the home long-burning stove became known by the name "Bubafonya." We’ll discuss it in more detail later.

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How the boilers of Stropuva brand are organized

Let’s examine the typical method for starting a conventional solid fuel boiler. We start by lighting small chips, and once they catch fire, we add full-fledged firewood to the firebox. The heat source is beneath the woodwork, down below. From this point on, combustion expands. Firewood burns quickly as a result, and a lot of thermal energy frequently shoots into the pipe.

Upper combustion is the foundation upon which Stropuva boilers are constructed. Because the wood is lit from the top rather than the bottom, they resemble Bubafonya wood stoves. These furnaces were modeled after Stropuva boilers, which operate on a similar principle. The length of the combustion process can reach several days, contingent upon the power output of the chosen unit.

What makes up a Stropuva boiler are the following components:

• Combustion chamber – starts at the very bottom of the equipment.
• Heat exchanger – here a "jacket" of the "pipe in a pipe" type is used. The coolant flowing through it ensures efficient heat intake and its transfer to the heating system.
• Air distributor – it is located above the combustion zone and supplies air to it.
• Draught regulator – allows you to adjust the temperature of heating medium heating.
• Air heating chamber – it is responsible for heating the air masses supplied to the combustion zone. This design ensures efficient combustion of wood.

The damper is used for the air intake, and the pipe in the back is used to remove combustion products (the chimney is connected to it). There are two doors in the front section for loading fuel and removing ash.

A long burning time is a characteristic of the Stropuva solid fuel boiler. Depending on the heated area, the mode of operation, and the unit’s heat output, it can operate for a few days on a single charge. Fuel options include hard coal, fuel briquettes, pellets, and dried wood. According to the manufacturer, coal can burn for up to five days.

Chimney

The chimney draught has a significant impact on the boiler’s efficiency. Poor drafts prevent combustion products from having enough time to escape through the chimney, which causes the boiler to start smoking and the room to fill with smoke over time. The combustion process also slows down in the furnace.

Usually, there are multiple reasons why there isn’t a draught:

Design of the Stropuva boiler chimney

• Insufficiently wide diameter of the chimney;
• Insufficient chimney height. Must be 50 cm above the ridge;
• The chimney pipe is filled with combustion products (tar, soot, etc.).д.);
• Incorrect dimensions of the horizontal part of the chimney (the length should be at least 20 cm, but not more than 150 cm).

A higher draft causes:

• overconsumption of fuel;
• increased combustion temperature;
• the increased noise of the boiler.

Fire safety needs to be given special consideration when installing a chimney. The boiler’s chimney connection needs to be made of metal.

Regular cleaning of the chimney’s horizontal section is also necessary because tar and soot accumulations have the potential to catch fire.

Joints need to be tightly sealed.

Checking the boiler after assembly

After assembly, checking the boiler

Make sure a homemade stroopuwa boiler is reliable and serviceable before putting it into continuous use. Don’t skimp on this action. A properly conducted inspection directly affects how safely the heating unit can be operated going forward.

Approximately one-third of the barrel’s height should be filled with firewood. Toss in a lit match and a small amount of kerosene. The wood should ideally ignite almost instantly. In this instance, there should be no indication of smoke, draft, or any other unusual smells.

Refuse to use the boiler if any of the aforementioned symptoms exist. Such equipment is prone to malfunction quickly and cause harm to its owners. There won’t be any issues at all, though, if you have put the unit together precisely in accordance with the instructions above.

A small room can be adequately heated with the firewood that was previously provided on a daily basis. Double the loading volume in a medium-sized room.

Therefore, you can do it yourself to gather a high-quality stropuva boiler for heating a range of small and medium-sized rooms. Currently, purchasing expensive equipment doesn’t require a large financial investment. Your house will always be warm and inviting if you just follow the directions.

Video – Stropuva boiler with their own hands

Characteristics of the Stropuva S10U

The power of this model is 10 kW. In this case, the area it is able to heat from 50 to 100 square meters. м. Fuel capacity is 200 cubic meters. dm, and coal can be laid as much as 75 kg. However, only 25 kg of firewood will fit. At the same time, their length should not exceed 30 cm. Water directly in the boiler cylinder is collected no more than 34 liters. Firewood burns in 31 hours on average. This is not a very high indicator, however, things are different with other materials. If you make a coal stack, it will be enough for more than three days. The efficiency of this model is 91%.

The water pressure in the boiler is 2 bar. The valve keeps it at 1.5 bar. The flow of heated water is 0.2 cubic meters. m per hour. At the same time, the maximum values sometimes reach 0.25 cu. m. m per hour. The water temperature in the boiler is 85 degrees. The size of the stoking opening is 250 by 210 mm. The height of this model is 1550 mm. The diameter of the chimney is only 160 mm. The minimum cross-section is 200 cm. Assembled boiler height 1920 mm. At the same time its depth is 450 mm. The total mass of the device is 450 mm.

History

Engineer Edmundas Štrupaitis of Lithuania invented the Stropuva boiler in 2000 by creating a design that allows fuel to burn from top to bottom.

The furnace was awarded a CE certificate in 2005, a testament to the product’s exceptional quality.

After winning "The Best Product of the Year" in Lithuania in 2008, the unit’s products were shipped to Russia and several other European nations. Nowadays, the majority of the CIS and EU’s member states sell Stropuva furnaces.

"Baikal Service" Ltd. is the official Lithuanian company representative in the Customs Union member states. In order to produce boilers in Russia, the "Stropuva Baikal Service" plant’s construction was initiated in 2012. Currently, approximately 100 dealers across various regions are involved in the plant’s product realization.

Operating cycle

The Stropuva boiler operates on a cyclic principle, meaning that fuel burns to the end at the beginning and at the end. The Stropuva boiler uses the principle of layer-by-layer upper combustion, unlike boilers with standard engineering layouts known as "Russian stoves," which ignite the fuel from the bottom and burn the entire volume at once, releasing some of the heat into the chimney and heating the "street." This allows for a long continuous cycle, lasting anywhere from 30 hours to 5 days, without the need to load more fuel until the previous cycle is finished.

This principle of operation is illustrated graphically in our picture. Unlike conventional boilers that operate on the basis of temperature amplitude—that is, the higher the temperature at any given moment when more fuel burns—the Stropuva boiler exhibits even combustion and a consistent temperature throughout the operation cycle.

Because of this, it is not advised to add fuel while the fuel is burning; however, in this situation, an uncontrolled process of fuel burning simultaneously from below (from unburned residues) and above is possible! The Stropuva boiler’s entire engineering concept as a long-upper combustion boiler is undermined by this, and it may even result in a scenario where a lot of fuel burns simultaneously with no benefit to the heating system, forcing the boiler into emergency mode!

Operation redundancy

The Stropuva boiler’s extended fuel burn will satisfy. It is still possible to miss the next fueling moment, though, even in this scenario. The heating medium’s temperature in the heating circuit will consequently begin to decrease. Our recommendation is to install a backup electric boiler in the circuit to avoid this from happening. It will activate and stay in the preset temperature mode if it senses a drop in temperature below the predetermined limit.

You won’t need much electricity if you remember to store the firewood for two to three days. Most of the time, the boiler will burn and provide heat for the users. So, you shouldn’t anticipate incurring significant costs. Furthermore, the auxiliary boiler need not be as strong as the main boiler; a model with a capacity two to three times lower is more than sufficient to avoid teeth grinding in the morning. It is also advised that you improve your home’s insulation to help it hold onto the heat for a longer period of time.

Features and advantages of stropuv boilers

The inventive top combustion in the boiler under consideration is its primary distinction. Additionally, the shape of the stropuv heat exchanger is rounded. These elements made it possible for the equipment to operate autonomously for the longest amount of time, greatly boosting its energy independence and coefficient of efficiency.

Numerous accolades, certificates, and, of course, positive user feedback all attest to the effectiveness and financial viability of stropuv boilers. But equipment that is assembled in a factory costs a lot of money. Furthermore, if you can easily assemble the boiler with your hands, there’s no need to spend money.

You can do a quick experiment to prove to yourself that top fuel combustion is efficient. Just take two matches and light them to get started. One holds flames upward, while the other holds flames downward. Turning a match upside down will cause it to burn much more quickly.

Long-burning solid fuel boilers STROPUVA

Layer by layer, the fuel burns in the boiler. The flame only reaches the layers beneath the surface after the surface portion has burned first. This makes it possible to attain maximum efficiency and the most sensible fuel consumption even when the boiler is running at minimum capacity.

Construction

These kinds of boilers are incredibly simple in design, but this has no negative effect on their efficiency. In order to maximize fuel efficiency, a unique telescopic distributor will descend as the fuel runs out. This distributor will supply air directly to the fuel’s point of combustion, rather than the fuel as a whole.

The boiler’s heat exchanger is cylindrical and rounded in shape. This removes the possibility that the coolant’s excessive internal pressure will cause the unit to explode.

The finished unit’s design is still very unique and ergonomic, even with its relatively large dimensions. Compact placement, minimal protruding elements, an almost entirely pollution-free boiler room, and an aesthetically pleasing cylindrical shape are all further indisputable benefits of the unit under consideration.

Advantages

Boilers using solid fuel STROPUVA

Numerous benefits come with Stropuva boilers, such as:

• very high efficiency factor. It reaches 90% or more, which is quite impressive, especially when compared to other solid fuel boilers;
• maximum autonomous operation duration for its class on a single fuel load;
• Independence from power grids and means of automation (for wood-fired models);
• ease of use and maintenance;
• safety of operation;
• reliability and long service life.

Boilers using solid fuel do not require connections to be made to various automation systems. Thermostatic properties of metal serve as the foundation for the equipment’s mechanism of action, which has several benefits. Complete independence from electricity should be highlighted as one of the primary benefits. This benefit is particularly apparent when it comes to installing heating systems in locations without electricity or with unstable power grids.

In other words, a homemade stropuv boiler can function well in situations where solid fuel is the only available source of heat. This kind of boiler can efficiently heat the building and heat the water at the same time.

Due to the relatively high cost of other energy resources, many people in Lithuania, the country where this equipment is made, install Stropuva boilers, even in regular apartments, despite their low power.

Solid fuel boiler Stropuva S10U

The Stropuva family’s first member. The boiler’s versatility has garnered positive reviews. The fact that it runs on both hard coal and wood is liked by many. Briquettes made of sawdust and various wood wastes can be used. This gadget works well in any room with a heating system. Boilers or radiators should be part of it. Homes with floor coils can also use them. It is optimal to possess everything. The efficiency factor will rise dramatically in this scenario. Boilers in this class are not limited to usage in enclosed forced heating systems.

These devices can also function well in systems that are electrically independent. It is even feasible in certain circumstances to install in buildings that have gravity heating. Users observe that this model’s economical efficiency is one of its defining characteristics. In this instance, a prolonged period of stable temperature can be maintained. Stropuva boilers are inexpensive, costing only 55,000 rubles.

Advantages of Stropuva boilers

Boilers of this type are more efficient than most solid fuel boilers because they constantly operate in the optimal mode. In a traditional TT boiler all the fuel burns, because of which the ratio of air and combustible gases is constantly changing. In Stropuva this ratio is constant, because only a small part of the fuel is burned. Traditional boilers for 1-3 hours release a huge amount of energy, so it is necessary to either constantly put fuel, if the boiler is small capacity, or put a heat accumulator (TA), storing heat energy. Ideally, the TA capacity is determined by the formula V=50*S, where V is the volume of the TA in liters and S is the area of the house in m². For a 100 m² house, the optimum TA volume for a traditional TT boiler is 5 m³. Stropuva has much less requirements for TA: 2,5-5 liters per m² – for a house of the same area the volume of TA will be 250-500 liters.

One laying of wood can last for 20 to 60 hours, depending on how much air enters the boiler during fuel burning. Simultaneously, the standard for all TT boilers continues to be true: 3.5–4.5 kWh of heat energy can be obtained from one kilogram of dry firewood with a moisture content of 12–15%. In particular, we provide the heat energy value in kilowatt-hours rather than Joules so that you can assess Stropuva’s efficiency in relation to other TT boilers and electric heating. A load of 100 kg of firewood will provide 350–450 kWh of heat energy in Stropuva for a while.

Types of boilers Stropuva

Stropuva boilers are known for their superior quality and dependability because they are all made in compliance with stringent EU regulations.

In addition, there are various types of solid fuel boilers Stropuva long burning available, each with unique characteristics:

• Wood-fired;
• On pellets;
• Universal models.

Let’s take a closer look at them.

Stropuva on wood

1. The construction is designed on the principle of the upper combustion method, which allows you to heat the house for 30 hours on one charge.
2. Models are characterized by high efficiency – up to 86.3 percent.
3. Stropuva wood-fired boiler units are used to provide heating for houses with an area of not more than 400 square meters.
4. The line includes five models, the productivity of which is 8-40 kW.
5. Wood boilers can not be heated with coal, as it can lead to the breakdown of the heat exchanger used.
6. A certain disadvantage is the impossibility to add wood when burning fuel. Loading is only carried out during melting.
7. The flow rate depends entirely on the model and the mode in which you turn on the boiler. If the house has an area of 200 square meters, you will need 60-80 kilograms of firewood for 30 hours.
8. The scheme of strapping with or underfloor heating is often used. Also popular has won the scheme of strapping, including . To find a drawing for strapping is quite easy.

Stropuva on pellets

Boiler models with pellets Stropuva has two distinct modes of operation:

• Combustion of firewood under conditions of prolonged combustion. Without additional loading and with a minimum charge, the boiler will be able to work for 30 hours;
• Pellet combustion. One charge is enough for 72 hours of autonomous operation.

Pellet models have unique features, even though their technical characteristics are almost exactly the same as those of wood boilers Stropuva.

1. Burning of pellets is carried out by special burners. The fuel is gradually lowered as the pellets burn down.
2. Due to its circuitry, the efficiency is increased and heat losses are reduced.
3. Circulation of the coolant is constantly carried out around the heat exchanger, which gives fast and uniform heating of the element.
4. Scheme of strapping with the connection of an indirect heating boiler has shown itself perfectly. Although the tying scheme with the presence of underfloor heating is not uncommon today either.
5. The true fuel consumption may differ from the stated characteristics of the manufacturer Stropuva, which is due to the lower quality of pellets used or poor maintenance. The drawing for independent connection is not a problem to find.

Universal Stropuva

It is clear from the name that these Stropuva models are made to function with various fuel types. Specifically:

• Coal;
• Firewood;
• Wood waste;
• Pellets.

1. Universal boiler models, as shown by numerous tests, are the most economical among the whole range of solid fuel heating equipment, which is produced by the company Stropuva.
2. It is not possible to use only wood waste as an independent solid fuel for boiler operation. When heating, be sure to add a little high-quality solid fuel.
3. To keep the efficiency of the equipment at a high level, it is necessary to perform regular maintenance. The operating manual of the device provides all the necessary instructions.
4. If it is planned to carry out piping to connect a boiler, underfloor heating or indirect heating boiler, the scheme must comply with the manufacturer"s requirements.
5. The best fuel for a universal boiler is coal. With its help, the period of autonomous operation of the equipment is increased, the heat output indicators are increased.
6. Under normal loads, when the boiler is not loaded to the limit with solid fuel, it is capable of operating for 130 hours.
7. Universal models are ready to take on board, that is, to place inside their furnace 220 kilograms of solid fuel.
8. During the operation of the Stropuva universal model, it is strictly forbidden to add coal inside the furnace. It is not a safe solution, which may have certain consequences.

Checking the serviceability of the boiler stropuva

It is essential to test the boiler’s serviceability before using it on a permanent basis. This is required to guarantee that the boiler would operate in a safe manner going forward.

Therefore, firewood must be added to the apparatus’s barrel until it is one-third full. It has a lid that is covered from above; however, before that, you should toss a match into the barrel to light the fire. It must always be mixed with kerosene for optimal ignition.

The firewood should ideally start to burn right away. No smoke, odor, or draught should exist. It is not worth using such a boiler if any of the aforementioned are noted. It is highly likely to cause harm to the home’s owners. But if everything was done right, these kinds of issues shouldn’t arise.

One small room can be kept warm for a full day with the quantity of firewood provided. It makes sense to double the firewood if the room is medium in size.

With his own hands, the boiler is thus prepared. The option available today might not be the best for heating a house, but it will work well for heating a garage or other non-residential space. Let this homemade device provide a dependable source of heat for a garage or other space. Warmth and comfort for your house!

Manufacturing sequence

Kind of do-it-yourself installation

• At the barrel, a lid with a small edge is cut out, for which a bolgar is used. In the lid right in the middle, a hole is made for a pipe with a diameter of 100 mm.
• Next, a grate is made of wire or angles. In fact, this is an ordinary grid, where it is important to determine the size of the cells. The finer they are, the better, especially when it comes to fine fuels such as sawdust or husks. By the way, the grate is not used in all models – sometimes you can do without it. If there is one, it is installed inside the barrel closer to the bottom. Fastening is done with electric welding.
• Now we move on to the manufacture of the load – the press. To do this, a round pancake is cut out of a 4 mm thick steel sheet, the diameter of which is 2-3 cm less than the diameter of the metal barrel. A through hole with a diameter of 100 mm is made in it.
• Weld a pipe to the pancake. Note that the length of the pipe should be greater than the height of the barrel by 20-50 cm. Now on the back side of the pancake it is necessary to weld 4 channels. They are needed to weight the press and create a small space under it – this will be the combustion zone. The channels are welded so as not to cover the hole in the pancake. The usual fixing scheme is crosswise.
• In the barrel just above the place where the grate is installed it is necessary to make a door through which you can clean the boiler from ashes and ash. Sealing of this device should be carried out with asbestos cord.
• On the side in the upper part of the barrel, almost near its upper edge, a through hole is made, and a small spigot with a diameter of 100 mm is welded to this place from the outside. This is where the chimney will be installed.
• Now you need to take care of the removable lid. The top of the barrel, which was cut out, must be brought into proper shape. To do this, its sides are slightly widened – they can simply be tapped with a hammer. On the upper side it is necessary to weld two handles, with which the lid will be installed manually. On the outside of the edge around the entire perimeter must be glued asbestos cord or a strip of fiberglass, which will contain the smoke coming out of the combustion zone.

Now that every component of the boiler is prepared, you can begin assembling the structure and laying the fuel.

The order of assembling the structure

Take note! The longer the fire burns, the more densely you stack the wood, with the least amount of space between them. The sawdust is easier; all it needs to do is be firmly packed down.

The barrel lid is placed on top of the stacked fuel and the press with the pipe upwards is positioned on top of it. The spigot is attached to the chimney. Due to their unusual design, long-burning stoves can only remove carbon monoxide gases through a pipe that is discharged horizontally. In other words, the chimney will be horizontal with a small upward slope rather than vertical. This is yet another characteristic that sets long-burning stoves apart.

The top layer of fuel must be ignited prior to setting the press. Next, the lid and press are put in place. In this instance, a significant quantity of heat energy will be released as the wood or sawdust in the combustion zone simply smolders. Burning out, the zone will progressively become settled as a result of the weight. The space created by the barrel’s walls and the metal pancake’s edges is where the smoke from burning solid fuel emerges. After that, it is taken out of the chimney. The pipe that is vertically welded to the pancake allows oxygen to enter the combustion zone.

The barrel’s metal will get extremely hot, so the construction is deemed dangerous in terms of potential fire hazards. Consequently, professionals advise:

• Install such a stove near the walls, which are erected from non-combustible materials.
• Under the long-burning furnace must be poured foundation. It can be concrete or made of fireproof bricks.
• A protective heat shield made of metal or bricks can be installed to increase operational safety.

Making a stropuv stove with your own hands

Plan for tying the heating system and boiler together.

As was already mentioned, creating a boiler is not difficult. What does a boiler require to be made? The following supplies and equipment are required:

• A large metal barrel;
• welding machine;
• metal pipe;
• channels;
• chisel;
• asbestos;
• fiberglass cloth.

A sizable metal barrel will serve as the boiler’s foundation. Almost every owner of a stockpile is undoubtedly one of these. These are frequently found at people’s barns, garages, or dachas. It won’t be difficult to locate it if there isn’t one. By the way, compared to modern barrels, Soviet barrels are far more dependable, superior, and long-lasting.

Initially, a hole needs to be made in the top of the barrel that already exists. Put another way, in order to fully access the barrel inside, you must "knock out" the entire top.

You now need to cut off a section of pipe that has a 15 cm diameter. It will function as a vent for smoke. Next, drill the matching hole in the barrel (on one of the sides) for the pipe that was previously cut and welded.

Diagram of the combustion process in a boiler.

By the way, take your time discarding the barrel’s cut top. It will only be required now. Create a 10-centimeter-diameter hole in the center of it.

The next stage is to make four channels and a pipe that are just a little bit taller than the barrel. All the way around the cover’s radius, the channels are welded to the cover every 45 degrees.

Pre-prepared pipe is welded to the opposite side of the lid. Subsequently, the lid can be placed directly onto the barrel and chimney pipe. It is best to use asbestos or fiberglass cloth for initial sealing.

For the blowpipe, a flap must be cut out. This is where leftover sheet metal pieces come in handy.

Peculiarities of installation and operation

• It is obligatory to install the system necessary for protection against overheating of the Stropuva equipment;
• If a certain scheme of strapping is used, circulation devices may be required;
• The piping scheme necessarily includes a check valve and a filter for coarse cleaning;
• Universal and pellet models additionally need air collectors;
• The chimney is best organized with sandwich panels;
• The soot should be cleaned whenever the fuel burns through. For this purpose, there is a special hatch in the bottom of the boiler Stropuva.

Stropuva: these premium solid fuel boilers have outstanding efficiency as their defining feature. You can use manufacturer manuals and video instructions for their connection, or consult experts. If you decide to use a solid fuel boiler, give it some thought. There are definite benefits to both gas and electric versions.

This month"s special prices

STROPUVA mini S8

18-hour bookmark

Up to 80 square kilometers in area.

8 kW of power

53,000 р.or 75 715 р.

Purchase in installments at 0%

STROPUVA Wood version, small S8

STROPUVA S15

Save this for up to 31 hours.

Area: 75–150 square meters.

15 kW of power

81 000 р.115 715 р.

Purchase in installments at 0%

Version S15 Wood for STROPUVA

STROPUVA S20

Save this for up to 31 hours.

Area: 100–200 square meters.

20 kW is the capacity.

85 500 p. 122 143 р.

Purchase in installments at 0%

Version S20 Wood for STROPUVA

STROPUVA S30

Save this page – from 31 hours

Area: 200–300 square meters.

30 kW of power

89 800 р.128 286 р.

Purchase in installments at 0%

Version STROPUVA S30 Wood

STROPUVA S40

Save this for up to 31 hours.

200 to 400 square feet in area.

40 kW of power

98 600 p. 140 857 р.

Purchase in installments at 0%

Version S40 Wood by STROPUVA

STROPUVA mini S8P

Save for up to two days.

Up to 80 square meters in area.

8 kW of power

56 500 p., 80 714 р.

Purchase in installments at 0%

Version S8P Pellet STROPUVA mini

STROPUVA S15P

Save for up to three days.

75 to 150 square meters.

15 kW of power

85 300 p. 121 857 р.

Purchase in installments at 0%

Version STROPUVA S15P Pellet

STROPUVA S20P

Resting for up to three days

The region is 100–200 kV. м.

20 kW of power

90 000 р.128 571 р.

Purchase in installments at 0%

Version STROPUVA S20P Pellet

STROPUVA S30P

Save for up to three days.

200–300 square kilometers, м.

30 kW of power

94 500 р.135 000 р.

Purchase in installments at 0%

Version STROPUVA S30P Pellet

STROPUVA S40P

Save for up to three days.

Area: 200–400 square kilometers.

40 kW of power

103 500 p. 147 857 р.

Purchase in installments at 0%

Version STROPUVA S40P Pellet

STROPUVA mini S8U

Resting for up to three days

Up to 80 square meters in area.

8 kW of power

61 000 р.87 143 р.

Purchase in installments at 0%

STROPUVA compact S8U solid fuel boiler

STROPUVA S15U

Save for up to five days.

Square: 75–150 kV/m^2.

15 kW of power

99 000 р.141 428 р.

Purchase in installments at 0%

STROPUVA S15U Solid Fuel Boiler Universal

STROPUVA 20U

Save for up to five days.

Size: 100–200 square meters.

20 kW of power

104,200 p. 148 857 р.

Purchase in installments at 0%

STROPUVA S20U Solid Fuel Universal Boiler

STROPUVA S30U

Save for up to five days.

Square: 200–300 square meters.

30 kW of power

106 900 p. 152 714 р.

Purchase in installments at 0%

STROPUVA S30U Solid Fuel Boiler – Universal Design

STROPUVA S40U

Save for up to five days.

Area: 200–400 square kilometers.

40 kW of power

115 900 p. 165 571 р.

Purchase in installments at 0%

STROPUVA S40U Solid Fuel Universal Boiler

Village V15

Resting for up to thirty hours

Area: 75–150 square meters.

15 kW of power

67 000 р.95 714 р.

Purchase in installments at 0%

Village V15 Wood edition

Village V30

Save for up to thirty hours.

Area: 200–300 kV/m^2.

30 kW of power

75,00 р.112,857 р.

Purchase in installments at 0%

Village V30 Wooden variant

Division D6 Stove

Cooktop: 15 hours or longer

Up to 60 square meters in area.

6 kW of power

42 843 р. 29 900 p.

Purchase in installments at 0%

Stove division D6

D6 TEG Stove Division

Resting for up to fifteen hours

Area: up to 60 square meters.

6 kW of power

50 000 р.71 428 р.

Purchase in installments at 0%

The D6 TEG stove division

If you want to increase the heating efficiency of your house, building your own Stropuva boiler can be a satisfying project. It is possible to build a reasonably priced heating solution that can drastically lower energy costs and have a positive environmental impact with the correct supplies and equipment.

The ability to tailor a Stropuva boiler to your unique heating requirements and available space is one of the main benefits of building one yourself. You can customize the boiler’s size and design to achieve maximum comfort and performance, regardless of the size of your home—whether it’s a large family home or a tiny cabin.

You can also have more control over the building process and the caliber of materials used when you construct your own Stropuva boiler. This guarantees that your boiler is made to last and run well for many years to come, giving you dependable heat during the chilly winter months.

The satisfaction of knowing that you’ve made a sustainable heating solution that minimizes carbon emissions and lessens dependency on fossil fuels is another benefit of DIY Stropuva boilers. You can reduce your heating expenses and heat your home in an environmentally responsible way by using wood pellets or other renewable biomass fuels.

In conclusion, for homeowners looking to increase their home’s heating efficiency, building a Stropuva boiler by hand can be a rewarding and useful project. It is possible to design a dependable and eco-friendly heating system that will provide warmth and comfort to your home for years to come with careful planning and attention to detail.

Video on the topic

Minuses and secret of solid fuel boiler Stropuva!!

✅Simple and inexpensive strapping of a solid fuel boiler of LONG BURNING STROPOUVE in a mini boiler house

Top burning boiler in operation, Pistons

Stropuva type long top combustion boiler with your own hands

Stropuva, bubafonya with your own hands.

Long-burning stropuva type boiler) with your own hands!

Solid fuel long burning boiler with your own hands.