How to make a chimney for a solid fuel boiler with your own hands?

In high-rise buildings, heat appears due to specialized organizations. But if you are building a private house, you should take care of heating in it yourself. Now solid fuel boilers are very popular. In order for their work to be safe and efficient, the installation of a chimney is required. Consider how to make a chimney for a solid fuel boiler with your own hands.

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Chimney Differences

Heating units differ in their properties, which must be taken into account during the construction of the chimney. These properties are unstable due to the fact that they are dependent on unstable factors. They are represented by:

• Flue gas temperature;
• Direction and strength of the wind;
• Air properties.

Important! In addition, the fuel burns unevenly, and therefore the flue gas entering the chimney has a variable temperature. If coal is used for heating, the temperature reaches 400-600 degrees, and if firewood - 70-300.

The main difference between chimneys is their design features. They may be:

• Outdoor type. In this case, an extension of ceramic brick is connected to the wall of the house.
• Built-in channels made of vertical brick. They are placed next to the ventilation shafts in the inner wall adjacent to the furnace room.
• External cylindrical chimneys made of steel. They are attached to a wall or to a metal mast.
• Vertically directed pipes made of metal. Their installation is carried out inside the building.
• Glass. This option is not very common, but such chimneys are not susceptible to high temperatures and corrosion. Their independent installation is almost impossible, you should seek help from specialists.

Important! In our separate post you will find out all the necessary information that you will need when installation of solid fuel boiler.

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Brick

Traditionally, a chimney for a solid fuel boiler is made of brick with its own hands. Such material is very resistant to high temperatures. However, a brick chimney weighs a lot, and this must be taken into account when building the foundation.

Important! When laying out the structure, it is very important to make all joints completely tight. This will require certain skills.

Of the minuses, it can be noted that due to the rectangular shape and roughness of the brick, soot strongly settles on it, so the chimney is then difficult to clean. But a huge positive plus is that condensate does not accumulate on such material, so the walls do not collapse.

There are rules for laying a brick chimney:

• Only solid brick is used.
• Fixation is performed using a conventional mortar of cement and sand.
• In order to avoid excessive cooling of the exhaust gases, the chimney is attached to the wall or mounted in a supporting wall.
• If the channel passes through the room without heating, it must be insulated with a non-combustible thermal insulation material (mineral wool is most often used).
• The wall thickness should be more than 120 mm.

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Ceramics:

• Such a material can withstand heat up to 1200 degrees. That is why it is so durable. The ceramic chimney is very easy to clean, as its surface is smooth inside.
• To place such a chimney, use a block or brick channel.
• Mineral wool is used as thermal insulation, due to which the amount of condensate formed is reduced.

Important! Additional structures do not need to be built if the ceramic pipe is in a metal sheath.

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Steel

Such pipes have several advantages:

• Simple installation;
• Quick repair;
• Light weight.

Important! The minimum wall thickness is 1 mm. At the same time, the pipe does not lend itself to high temperature and corrosion.

The composition of such a chimney is two steel pipes, nested in each other, separated by a layer of insulation. The surface inside is smooth, so condensate flows down it without obstacles, being in a branch pipe specially designed for its removal.

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How to choose a chimney?

Before deciding which chimney is best for a solid fuel boiler, you need to pay attention to a number of criteria:

• Traction force. This indicator determines how productive the boiler will be. The thrust depends on the cross section of the pipe, its height, the presence of elbows in it. The greatest thrust is observed in straight pipes, the height of which is not less than five meters.

Important! If a high hum is clearly audible in the pipe, a special damper is used to adjust it. If the draft is low, smoke and smell appear in the room.

• The design of the chimney. Due to roughness and bending, the draft is reduced, as the trajectory of the smoke flows changes.
• Section of the chimney. The most effective are round and oval chimneys, the indicators of the rectangular diameter are lower.

Important! To determine how to correctly make a chimney for a solid fuel boiler, the temperature of the smoke stream must be taken into account, since each material has a heating limit.

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We increase the efficiency of the chimney

In order for the installation of the chimney for a solid fuel boiler to be successful, a number of requirements must be observed even at the development stage:

• Consideration of all fire safety requirements. Highly flammable materials should be at least 380 mm apart. All floors will require insulation. The thrust should be at the proper level for the complete removal of all combustion products, which can only be achieved if the pipe is brought out above the roof level.
• Materials should fit snugly and fit correctly.

Important! The internal cross-sectional area must be the same, otherwise the chimney will not work properly.

• The design should be vertical. Horizontal sections are allowed, but not more than a meter long, with a slope of 30 degrees.

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Stock footage

For the installation of the chimney, of course, certain skills will be required. It is very important to strictly follow all instructions and diagrams, otherwise - a fire may occur!