Installation of the chimney sandwich with their hands

Perhaps only electric boilers do not need to install the chimney.All other heat generators that use solid, liquid or gaseous fuel system without discharging combustion products to the atmosphere can not work. Therefore, in considering the organization of an autonomous heating and hot water, a lot of attention have to pay and the construction of the chimney.

similar problem now has multiple solutions, from the old traditional schemes in the form of stationary brick pipes to prefabricated structures made of metal or composite materials.Each option is characterized by its degree of complexity, labor intensity, the efficiency of a specific heaters.One of today's solutions have gained wide popularity both in industry and in private construction are metal sandwich chimneys .And along with the high performance of the system, one of the most important its advantages is the fact that it is possible to install the chimney sandwich with their hands, without invitation expensive specialists.The main thing - properly understand the principle of its work, to plan and choose to strictly observe the assembly technology.About

everyone else has thought a manufacturer - installation is not particularly difficult and can be carried out fast enough.

main advantages sandwich chimney

Metal pipes, as an element fume collection systemused for a long time.This is due to many reasons.

• Firstly, a circular cross section in any case is best to pass the gases.
• Secondly, even and smooth internal walls do not create obstacles to the passage of smoke and less susceptible to sooty build-up.
• Third, the installation of the chimney of the major details - much easier than brickwork.

flue gases differ saturation chemically aggressive substances, which, against the background of frequent thermal changes, able to activate corrosion processes, leading to a rapid exit from the chimney system and its burning-through.This problem certain extent been solved by development and introduction of resistant stainless steel alloys.However, the use of stainless steel is not yet eliminated several serious drawbacks metal chimneys:

• high thermal conductivity of the metal leads to rapid cooling of the gas output, particularly in the areas of chimney, located outside the building.This entails lower total thrust - it will be very dependent on the external temperature conditions.
• This temperature difference causes even one negative thing - active condensation.Excessive moisture on the inner walls of pipes - a decrease in the efficiency of the chimney, prerequisites for his soot encrustation and corrosion activation.
• on to initial areas, and especially in the vicinity of the heater, the outer walls of the chimney are heated to temperatures that may be serious threat in terms of flammability of building designs and materials, and personalthe safety of people living in the house - accidental touching them burn finishes.

safely resolve these problems were developers sandwich chimney .

Schematically its structure can be described as follows.

Actually, the Chimney channel formed by the pipe (. Item 1), made of stainless steel with welded on TIG technology - in a protective argon gas environment.

outer tube is also very often made of stainless steel welding method (Pos. 2).(Pos. 3) can be purchased and more affordable option when external casing is made of galvanized steel.On sale you can find models that housing has applied decorative enamel coating of a particular color.

pipes separated layer of high temperature resistant and non-combustible thermal insulation material (pos. 4).Most in this this applies basalt rock wool high density (approximately 200 kg / m³).The thickness of this layer can be different from 25 and up to 100 mm - selection being based on the specific operating conditions.

All chimney elements have a special coupling system (Pos. 5).Typically, a set of bells and narrowed areas to ensure a tight fit and durable parts.For greater reliability connection nodes amplified clamps (pos. 6).Individual parts of some models sandwich chimney may have another connection principle, for example, with the use of flanges.

This device reliably protects the chimney feed from external temperature effects.It defines the main advantages of such sandwich chimney :

• was possible to reduce the formation of condensation to an acceptable minimum.
• For account the relative flatness of the temperature inside the channel at all its length, significantly increased performance required a stable traction.
• External pipe-casing does not heat up to significant temperatures and does not represent a serious danger.
• Such chimney scheme may well be placed outside the building - it's easier and faster installation, saves space in residential or technical premises.
• With the passage of the chimney through walls, floors or roof cut-out openings need much smaller than in conventional single- pipes.In addition, it is possible to purchase and install special communicating modules.

course, this chimney will cost slightly more expensive than normal, and the installation of it a little bit harder, but it's all handsomely pays its other advantages.

How to choose a sandwich dymoho qq A home

to the chimney worked efficiently and was durable and owners not experienced disappointment after a few years of operation, it takes a very responsible approach to the problem of selecting the desired set of parts.Throughout the selection process can be divided into several main areas - is the material quality control and performance parts, determination of the optimal arrangement and, finally, selection of appropriate sites for its practical implementation.

materials used for sandwich chimney

At first glance, all sandwich chimneys look the same.However, it should be remembered that the production of such systems is quite a profitable business area due to the high demand, and this will inevitably entail appearance on the market of a large number of malokachestvennoy products.To acquire such products only in their external metallic luster - is the height of folly.Increased attention should be paid to the quality of the steel, and in particular - applied for internal chimney channel.

On the Internet you can find many photographic evidence that seemingly solid steel construction burns through, deformed and it is - a huge possibility fire or carbon monoxide poisoning gases.The conclusion is - low-grade steel was used for the inner tube, or with Hg al did not meet the specific performance characteristics of the heating unit.

1. So, what you need to know about the brands of stainless steel used for the manufacture of sandwich chimneys .

• Stainless steel grade AISI 430 is among the most inexpensive.It is good for the outer casing sandwich pipes , since atmospheric exposure can not hurt her.But for the internal channels it is better not to use - resistance is not enough.In addition, there are certain difficulties in the implementation of high-quality welds.
• AISI 439 differs from the 430 inclusion of titanium alloy additives.This increases its corrosion resistance and mechanical strength.These pipes are suitable for gas and solid fuel furnaces and boilers of small capacity.
• Stainless steel AISI 316 includes dopants - molybdenum and nickel, which gives eventually high corrosion protection even silnoagressivnyh acid environments, and good thermal stability.These pipes are the best choice for gas-fired boilers of any capacity.
• AISI 304 is very similar to the 316, but has a smaller amount of alloying elements.This predetermines its lower price, but also the quality, of course, is not as high.
• The most versatile include stainless steel AISI 316 i and AISI 321. Along with excellent corrosion resistance, they have excellent ductility and is easily able to withstand heat up to high temperatures - about 850 degrees.
• most expensive but also the most high-quality alloys used for the manufacture of chimney is stainless steel AISI 310S.Limit its heat resistance reaches 1000 degrees, so it can be safely used in the chimneys of solid pyrolysis high power boilers.

If indeed acquired a quality system sandwich chimney , then it technical documentation must be marked with the brand of steel.If that is not, and on all product labeling is applied, the purchase will involve a certain risk - it is quite possible to run into a low-quality counterfeit.There are still and "popular" method of testing stainless steel - it is, if dopants, does not keep the magnet, he slips on her surface.If the magnet is attracted and fixed on a vertical surface, then purchase a "stainless steel" is not worth it.

What should be Dia Tr ext morning pipe?It depends on the characteristics of the heating system, a furnace or boiler.There calculation system cross-sectional area, depending on the heat capacity of the device.In order not to get into the complexity of the formulas, can cause averaged values:

thermal capacity of the boiler or furnace	Minimum cross-section of the chimney	cross-sectional area	based on the tube - diameter
up to 3.5 kW	140 × 140 mm	19600 mm ²	158 mm
from 3.5 to 5.2 kW	140 × 200 mm	28000 mm²	189 mm
from 5.2 to 7 kW	140 × 270 mm	37800 mm²	220 mm

These figures are minimal and are rounded.But in any case , the chimney-section at any section can not be less than the outlet cross section of the boiler or furnace.

2. Another important parameter - the type and thickness of the insulation layer.When selecting an advantage should be given to products of famous brands, for example, PAROC ROB 80 t or MAT 30 or ROCKWOOL WIRED MAT 80. It - basalt wool , absolutely nonflammable , with a high coefficient of thermal resistance.

insulation thickness required depends on the type of heating system (boiler or furnace) and the average temperature of the combustion products to be allocated.Approximate values ​​are given in the table:

type of furnace or boiler	average temperature allocated	combustion products thickness of insulation sandwich pipe
Gas boilers Condensing	60	25mm
Gas boilers	110 - 180	25mm
diesel boilers	150 - 250	25mm
gas powered and diesel-generator sets	450 - 600	50mm
Solidboilers	400 - 700	from 50 to 100 mm
Wood burning stoves and fireplaces	300 - 600	from 50 to 100 mm

Arrangement sandwich chimney

selecting accommodation chimney is usually considered the two main schemes: the inner installation with passageways through ceilings and roof, and external, with the passage through the wall and installation on the outside wall of the building.

• For internal placement of the chimney, he defeated a lesser extent external influences, practically reduced to zero condensation.This option is appropriate, for example, to the bathhouse furnace, because it is possible to install on initial segment of the pipe (up to tie-in sandwich construction) tank to heat the water, as shown in the figure, or a mesh section for placing the heater.

Anyway , between the boiler (furnace) and sandwich chimney must be installed intermediate section having no insulation layer.Usually it is provided with a valve (slide valve) to regulate the possibility of exhaust heat in the chimney, which is especially important for the sauna stoves.

main disadvantages of such a scheme - enough consuming and complex processes organizations pipe penetrations through floors and in particular - through the roof.In addition, a chimney "eats" space facilities.

• When external location along the outer wall of the chimney installation work much simpler - requires only a single pass through the wall.The elements are mounted by support brackets and pads.Indoors remains more space, minimizes the risk of accidental fire or carbon monoxide poisoning.

disadvantage - pipes are more susceptible to the aggressive action of the external environment, much larger scale becomes condensation that should be taken into account during installation.In addition, not all may like the look of the building located on a wall of the pipe.

Required parts for assembly sandwich chimney

When at finding the chimney, after selected the scheme, it is necessary to compile the project to determine the necessary detailing for installation.In principle, this should come to the aid of a specialist heating engineer or, in extreme cases , salon-shop consultant, but you need to understand this issue and himself.

Almost all the leading manufacturers sandwich chimney produce all the necessary parts and components for the assembly of a complete system.