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Chimneys "Kraft": description, installation, prices

Russian products today are almost equal in quality and performance characteristics to foreign analogues, which have a higher cost. As an example, we can consider modern "Kraft" chimneys, which are made of stainless steel and are characterized by high performance characteristics. These designs have the form of modular systems, based on high-strength steel, it is characterized by heat resistance and resistance to acids. Therefore, the material is able to effectively resist aggressive substances.


Chimneys "Kraft" today can be purchased in several varieties. Some of them are represented by systems for liquid-fuel or gas condensing boilers, other designs are intended for heating furnaces or home fireplaces, while others are used as a component of coal heating appliances. In the manufacture of the former, AISI 316 steel is used, which is capable of undergoing high temperatures. It is possible to operate such chimneys for a wide range.

Those products that are intended for simple heating stoves and home fireplaces are made of AISI 321 steel. It is a stainless steel, which is additionally strengthened by titanium. This approach has made it possible to achieve maximum protection against corrosion. Chimneys are multi-layered and protected from condensation, they can be operated without loss of quality characteristics for several decades. If you are interested in Kraft chimneys for coal heating systems, then you should be aware that they are based on AISI 310 steel. It is characterized by high heat resistance and is capable of undergoing temperatures of up to 1000 ° C.

What else do you need to know about Kraft flues

If before you two-layer chimneys, then they have a heat-insulating material Rockwool, it is represented by fire basalt wool. It is able to prevent cooling of the pipe and to eliminate the accumulation of liquid, which ensures uniform combustion.

Product prices

Chimneys "Kraft" are presented today for sale in a wide range, among the varieties of the components of this system you can find the components and different types of chimneys. For example, the deflectors are 1800 rubles. And above, while the bends - 689 rubles. For a sandwich-pipe 500 it is necessary to pay 2600 rbl.

Installation instructions

Installation of chimneys should be carried out in conjunction with the plugs, which are equipped with condensate drainage. Alternatively, a revision can be used to maintain the channel. When the roof is made of non-combustible materials, a spark trap must be installed in the chimney, it is made of a grid with a square cell, the side of which is 5 mm.

When designing and installing a chimney, the system is not allowed to shrink, but it is quite possible to expand it somewhat. This may be needed to build a chimney furnace, the output diameter of which is 140 mm. In this case, you can not buy a chimney with a cross section of 120 mm, but you can use 150 mm, but you need an adapter.

When you will equip the horizontal sections, you must remember that their length should not be more than a meter. The mating points of the chimney elements should not be located at the points of the roofing passage and ceiling, as well as the passage in the wall. Tees and bends must be installed in such a way that they do not have a load from the elements of the chimney.

Working with additional elements

Installation of chimneys can provide for the use of additional elements, which are:

  • Convectors;
  • grid;
  • container for water;
  • Tank-heat exchanger.

The convector should be installed on a heating or a bath oven, and as its task will be the selection of heat for the chimney. On top of the grid, it is intended to increase the volume of stones. Water heaters for furnaces are installed on top of them and are intended for heating water to the boiling point. The water heats up quickly enough, because the pipe passes through the tank. Before use, the water must be cooled or diluted.

The heat exchanger is used in conjunction with the expansion tank and is used in conjunction with fireplaces, heating or bath ovens. Water heaters are located on top of the furnaces and are intended for heating the liquid to the boiling point.

Arrangement of access points through the ceiling and roof

When installing chimneys, they must be carried through the ceiling. In this case, a passage assembly is used, which must be greater than the thickness of the ceiling by 70 mm. Sometimes in heat-generating devices there is an increased temperature of waste gases. Such conditions require that insulated chimneys be used, they are supplemented with insulation and provide fire safety. Pipes also pass through the roof, while using a roof trim or a silicone roof seal "Master Flash", which is used for a flat or angled roof. When installing the chimney, the building codes and fire safety rules must be observed. It is important to remember that the chimney is heated during use. If it passes near the building structures, which are based on combustible materials, it should not heat them above 50 ° C.

Features of the chimney mounting

Chimneys "Kraft", the prices for which were mentioned above, should be secured with the exclusion of the possibility of deflection or displacement under their own weight or from the wind of any elements. To do this, use a wall mount, which is set at a rate of one unit for every 2 m of the chimney. The step from the chimney to the wall will depend on the wall attachment used.


Modern chimneys must be installed, starting from the bottom of the heating or heating device. All the joints of elements and pipes, as well as tees and waste should be sealed with heat-resistant mastic. Moreover, the components must be connected to the full depth of the landing bell, by fastening the elements with a crimping clamp.


Regardless of whether the chimneys are insulated or normal, after completing the installation it is necessary to conduct a test furnace, in the process it is important to check the seals and make sure that the adjacent structures are not influenced by high temperatures. If they are made of combustible materials, they should not become very hot.

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