Reliable, simple, not dusty: long-burning boilers Stropuva

Heating of any residential, commercial and industrial premises is the basis for comfortable living, living and working in it. However, it often happens that you have to spend a lot of money on heating, including even at the stage of purchasing the heating devices themselves. However, you can save money by creating homemade boilers based on Stropuva with your own hands. This will allow you to significantly reduce both the cost of a heating device and the cost of purchasing fuel, because... These homemade boilers belong to the category of long-burning boilers and provide the most efficient energy consumption.

Figure 1. Design diagram of a pyrolysis boiler.

a brief description of

STROPUVA solid fuel boilers are long-burning boilers and are suitable for various operating conditions. The main value of the equipment of this Lithuanian brand is that the boilers can operate for a long time without additional fuel loading. The burning time of one load of fuel is: wood – 30 hours, coal – up to 5 days. A simple design, made in compliance with technology, guarantees trouble-free operation.

Furnace Stropuva

The company presents two groups of equipment:

• The S index marks boilers designed only for use with wood. Equipment power: 7, 10, 20 and 40 kW.

Stove Stropuva S

• The SU index denotes universal models designed for heating with both wood and coal (power: 10, 20, 40 kW).

Stropuva SU stove
What you need to know for normal and efficient operation of the boiler:

• you need to choose the right power of the equipment (calculate it yourself or trust a specialist);
• degree of protection of the room from heat loss;
• fuel quality (when using “slightly” damp wood, the thermal power drops by 10% or more);
• installation and connection of the boiler must be carried out in compliance with technical requirements.

All Stropuva boilers are easy to use:

1. The boiler is loaded at predictable intervals.
2. Cleaning – several times a month.

About the Stropuva boiler

Stropuva boiler connection diagram

Piping diagram with backup heater, hot water boiler and heated floor.

After the purchase, when filling out the documents, the seller will ask you: “Do you need the help of a specialist in installing the heater?” Do not rush to answer: “No.” The connection diagram for the Stropuva boiler is somewhat different from other types of solid fuel boilers. On the official website you can find three strapping options:

• with backup heater, hot water boiler and underfloor heating system;
• only with boiler;
• with a boiler and low-temperature underfloor heating system.

Maybe for some it is, as they say, “a piece of cake,” but for a person without specialized knowledge, these schemes cause stupor. This is not to mention connecting the Stropuva heating boiler yourself. In general, it is better to use the services of experts in this matter. By the way, opinions have been heard more than once on the forums about the complexity of tying this equipment.

Operating principle and design

The main technological feature of the Stropuva boiler is the use of a “top-down” combustion scheme. Combustion is ensured by air supply through a diffuser telescopic pipe on which a round seal is mounted. Acting like a piston, the pipe with the seal under the influence of its own weight constantly descends towards the burning layer of fuel, providing an oxygen supply. The compactor compresses the ash that remains at the top. The heated gases transfer their heat to the walls of the firebox and are then removed through the chimney.

Oven Stropuva

Diagram 1. structural elements of the Stropuva boiler

1. Blower damper.
2. Damper regulator.
3. Damper regulator support.
4. Thermometer coupling.
5. Air heating chamber.
6. Telescopic diffuser.
7. Fuel loading door.
8. Nozzle.
9. Fuel.
10. Ash collector flap.
11. Foundation.
12. Air flow adjustment lever for different types of fuel (station wagon models only).
13. Window for air supply to the heating chamber.
14. Heating circuit supply connection.
15. Chimney socket.
16. Thermal valve connector (burst safety valve).
17. Telescopic diffuser control cable.
18. Travel limiter.
19. Return supply.

This scheme provides the following advantages:

1. A large amount of fuel can be stored.
2. By burning out in stages, rather than all at once, fuel can be used more economically and efficiently.
3. Long burning in this design contributes to maximum heating of the heat exchanger, reducing heat loss through the chimney - the flue gases enter the chimney almost cold.

Table 1. Long-burning boilers Stropuva SU. Specifications

Since Stropuv heating devices do not produce excess heat, there is no storage tank in the design. Thanks to this fact, the boiler, compared to analogues, is smaller in size.

Stropuva stove piping

The design includes a bimetallic draft regulator (does not require power), which allows the consumer to regulate the supply of oxygen to the firebox, changing the combustion strength and coolant temperature.

Note: The length of the chimney for such a boiler is generally 4.5 m. According to this characteristic, Stropuva boilers are not inferior (and more often superior) to other solid fuel analogues. These dimensions allow you to save on the initial costs of installing a chimney.

Structure of the Stropuva boiler
Other advantages:

• non-volatile operation or extremely low power consumption for embedded systems;
• high efficiency – up to 90%;
• reliable layout and quality of production ensure safe operation. The boiler belongs to the “non-explosive” class: when overloaded, it contracts inward (where a vacuum is formed) without destroying the room.

Table 2. Dimensions of universal boilers Stropuva SU

* - available upon request

What to heat with?

The heat consumption for an insulated house with an area of ​​100 m2 (±5%) for the middle zone is 12500-25000 kW/h (depending on the “softness” of winter and the geographical location of the house). Table 1 shows the estimated costs of various types of fuel.

Firebox of the Stropuva furnace

Table 3. Calculation of fuel volume for 150 days of heating a house with an area of ​​100 m2

Chimney installation

Good news: you can connect Stropuv boilers yourself if you have experience in similar plumbing work. If you don’t have the skill, go straight to the specialists. Please pay attention to the installation instructions - installation differs from other long-burning solid fuel boilers.

Stropuva

Important! If you install the chimney incorrectly, you expose yourself and the equipment to danger. Violation of requirements leads to the following consequences:

• unstable combustion, lack of traction;
• formation of condensation, less often - the formation of air pockets;
• accumulation of carbon monoxide.

The cases listed are rare, but they have happened in practice before. Today, automation will protect you in advance from such large-scale troubles. The most likely failure, due to an incorrectly installed chimney, will be the boiler extinguishing and combustion stopping. This will be very annoying, especially on frosty winter nights with winds and snowstorms.

Boiler Stropuwa

Therefore, the final height of the chimney must be calculated taking into account the height of the house along the ridge. It is better for the pipe to protrude above it. If the equipment includes a smoke exhaust fan, you can limit yourself to a 4.5 meter pipe. But, it’s better not to take risks and protect yourself from all sides.

Table 4. Installation parameters of chimney pipes of Stropuva boilers

Manufacturing of the Stropuva boiler

To make this type of furnace, metal products with a thick wall are not needed. Therefore, we will take an ordinary two-hundred-liter metal barrel as a basis. If you can find a Soviet-style barrel, this would be ideal.

In addition to the barrel you will need:

DEFORT DWM-161. 4 510

• A metal sheet 4 mm thick - we will use it to make a load.
• A pipe with a diameter of 100 mm for making a pipe for the chimney and pipes for supplying fresh air to the combustion zone.
• Wire 6 mm thick or several corners for making a grate.
• Channels for weighting the load.

Tools needed:

• welding machine;
• Bulgarian;
• hammer;
• chisel;
• roulette.

Additional materials you will need are fiberglass and asbestos cord. Please note that a welding machine is used, which you must be able to operate. Without it, you cannot make a Stropuva solid fuel boiler with your own hands.

Attention: fakes!

Note: Stropuva boilers can be counterfeited. The popularity of this design is so high, and the design principle itself is so simple that the “craftsmen”, with their raking and greedy hands for easy money, started the production of such equipment.

Modernization of the Stropuva boiler

But there are distinctive features of the original and counterfeit products:

1. Branded powder painting guarantees a long service life of the coating; the paint itself is applied very carefully. According to reviews of those who bought a fake, the paint does not stand up to criticism. And the original coating is also thermoplastic (can expand/contract without compromising the integrity of the paint)
2. Each product is marked with the Stropuva logo and is additionally protected with a hologram.
3. The cast iron firebox door has rounded corners and usually no attention is paid to such points - it is expensive for the production of fakes.

Original Stropuva stove
To avoid buying a fake, contact certified product sellers in your region.

conclusions

• Stropuva boilers are a good option for heating residential buildings, buildings and premises of service industry enterprises, cafes, and small production workshops. The reliability of the design is confirmed by the long service life of these boilers. No completely negative reviews on the Internet about the brand’s products were found.

• Price categories: in terms of cost, solid fuel boilers of this brand correspond to gas analogues in the middle segment. The difference in price between Stropuva models is almost twofold: a minimum power stove can be found from 50 thousand rubles, a 40 kW boiler costs up to 100 thousand rubles.

Stropuva stove piping

• The optimal types of fuel are coal and firewood. No reviews were found on the use of peat briquettes and other types of fuel.

• Installation of the boiler is simple and can be done with your own hands. Given the large height dimensions, make sure you have an assistant. It is important to remember that this boiler must be installed on a foundation 10-15 cm high.

• The fire safety of the equipment and safe operation, in general, completely satisfy the owners of this equipment.

• In terms of price/quality/heating and operating costs, you can safely rate it 4+ on a five-point system.

• The manufacturer provides a 5-year warranty on all components and assemblies of the boiler.

Feedback on the operation of the Stropuva boiler

What else to read:

Stropuva boiler or Bubafonya stove

List of structural elements of the Stropuva boiler.

In the previous article we talked about long-burning stoves for homes, cottages, bathhouses, and how to heat them. Today we will talk about two units that are similar in their principle of operation - the Lithuanian boiler Stropuva and the Bubafonya from Kolyma, and we will even try to compare them. Those who think whether it is possible to make a Stropuv boiler with their own hands will have to be disappointed, most likely this will not be possible.

Some structural elements are very complex and can only be manufactured in production conditions using machine tools. But a domestic, simplified analogue can be assembled in a day. Of course, it does not have such high characteristics as factory units, however, it will heat a dacha or garage in no time. The option is super economical and practical, like the AK-47.