We study a gas condensing boiler - the principle of operation and device. Gas condensing boilers Reduction of harmful emissions

In order to understand how much more profitable it is to purchase a condensing boiler, it is necessary to compare its characteristics and parameters with a gas boiler. The combustion products in a simple gas boiler pass through the heat exchanger of the device, so some of the heat will be lost. This can be explained by the fact that, together with the exhaust gases, a certain proportion of hot vapors will go into the atmosphere. A condensing boiler stores this heat energy in the form of steam, which is why it is considered to be more efficient than a simple gas boiler.

After the vapor has cooled, it is converted to liquid. This condensation process will release some heat. In a conventional boiler during its operation, there is a fight against such a phenomenon as condensation, and in the case of a condensing boiler, condensation is a useful phenomenon. The condensation process takes place in a heat exchanger, which, in comparison with a gas boiler, has a slightly larger size. This component of the condensing boiler collects heat energy for the heating system.

The heat that is formed during the complete combustion of the fuel unit, taking into account the steam that is released during the condensation process, is called the "higher" heat of combustion of the fuel.

The "lowest" calorific value will be the amount of heat excluding condensation heat.

Condensing heating boilers began to enjoy popularity relatively recently, although the principle of their operation was known to mankind more than 100 years ago. Today, thanks to technological progress, in the manufacture of boilers, they began to use alloys that have good resistance to corrosion and other destructive processes.

Features of condensing boilers

Based on the laws of physics, it is necessary to understand that even insignificant heat losses are inevitable in any case and the efficiency will not reach 100%. Compared to gas boilers, condensing boilers are more economical. This figure for condensing boilers is about 15-20% higher.

Condensing boilers are equipped with more modern burners, which minimizes the possibility of incomplete combustion of the fuel. Much less is emitted together with exhaust gases harmful substances and the temperature of the exhaust gases also decreases, which rarely exceeds 40 degrees. For such boilers, you can use and plastic chimneys, which allows you to save on this component of the heating system. Also, the costs of installing chimneys are reduced.

As for the design, wall-mounted condensing gas boilers are almost in every way similar to traditional-type gas boilers.

Most often, condensing boilers are of the wall type, however, there are also powerful floor devices... Such boilers are rarely used for residential applications. Basically, they can be found in office premises or in production.

The main difference from conventional boilers is that in condensing boilers the heat exchanger is made of materials with good resistance to various acids. Usually such materials are stainless steel or silumin. Due to the high acidity, condensation forms, and it causes a corrosion process if such alloys are used, which are used for the manufacture of non-condensing boilers.

Main components of the condensing boiler

The heat exchanger for condensing boilers can be made in the form of pipes with a complex cross-section. This is necessary in order to increase the volume of the heat exchanger as much as possible, thereby increasing the efficiency of the condensing boiler. In boilers of this type, a fan is installed in front of the burner, which extracts gas from the gas pipeline and mixes it with air. Further such working mixture goes to the burner.

Flue gases leave the system by means of coaxial type chimneys.

For the manufacture of such chimneys, manufacturers mainly use plastic with good heat resistance. The pump built into gas condensing heating boilers is electronically controlled and optimizes the boiler output, thereby saving electricity.

The efficiency of the boiler operation largely depends on the parameters of the heating system as a whole. If the water temperature is low, then the condensation of water vapor will occur more completely. Thus, a significant part of the latent heat will return to heating system... This will also affect the fact that the efficiency index of the condensing boiler will be slightly higher.

Not every heating system is suitable for a condensing boiler. The heating system must be designed for a not too high heating medium temperature.

That is, it should be relative low temperature system heating. In the return circuit, the coolant must have a temperature not higher than 60 degrees. Outside conditions are irrelevant. If there is a slight frost outside, then the temperature of the coolant in the return circuit will not be lower than 45-50 degrees. Thus, the boiler will operate in condensing mode.

Low-temperature heating boilers can be either one or two circuits. They can be used to organize a heating system or for hot water supply. Such boilers may differ in power parameters. The range of their power is quite large and ranges from 20 to 100 kW. Such power, which is provided by low-temperature heating at home, is enough for any living conditions.

For the industrial area, you will need to purchase a more powerful floor-type boiler.

Various kits for connecting condensing boilers are also available. These components include: condensate neutralizers, expansion tanks, various safety devices, flue gas kits, piping kits and much more.

In many European countries the use of boilers other than condensing boilers is prohibited. This is due to the fact that they have a higher efficiency factor and they emit much less harmful particles into the atmosphere. In such countries, the state takes care of its people, because it prohibits the use of equipment that does not have good efficiency and a low level of safety from an environmental point of view.

The difficulty in applying the condensation principle before was that the accumulating condensate in a gas heating boiler led to corrosion. metal elements constructions. The problem ceased to exist when corrosion-resistant alloys and stainless steel were used for the manufacture of equipment.

Boiler device

Condensing boiler - what is it structurally?

The main working element is a stainless steel heat exchanger in the form of a coil. Inside the spiral is located a heating element(burner). The coolant is supplied to the coil from the return line and is heated by the burner.

On the side of the inlet pipe, where the water is coldest (less than 59 degrees), steam condenses on the walls of the chamber. In condensing models, the combustion chamber closed type, i.e. the boiler takes combustion air from the street, and the combustion products do not leak into the boiler room.

The system is equipped with:

• a circulation pump forcibly distilling the coolant (located on the return pipe, equipped with a filter);
• coaxial chimney (double pipe, for air supply and smoke removal at the same time), connected at the top of the unit;
• a fan for forced air injection to the burner;
• condensate drain.

The scheme includes protection and control devices (). Modern models boilers allow the possibility remote control, starting with remotes and ending with SMS.

Pros and cons

Conventional or condensing boiler - which is better and in what situations?

The main advantages of condensing units are high efficiency and economy. Thanks to the design of the burner (), the fuel burns out almost completely, the amount of waste is minimal - that is, from an environmental point of view, this boiler is also better.

The smoke temperature is below 40 degrees - this means that you can use plastic chimneys, and they are cheaper than metal ones. Due to less combustion products and built-in forced ventilation smaller pipes can be used.

The advantages of this boiler equipment include:

• compactness, light weight;
• easier installation;
• modulating burner;
• gas savings, on average 35%;
• low noise and vibration level;
• saving on the chimney;
• environmental friendliness (7 times less harmful emissions);
• cascade installation is possible (several boilers in a common system).

The main disadvantage is the high price, but right organized system heating the difference pays for itself.

Features of condensation models

The principle of operation of condensing boilers is such that for operation a small temperature fork is needed between the supply and return. This means that the initial temperature of the coolant should not be too high. Therefore, it is believed that the most efficient use such models -.

Like a simple gas boiler, there is a condensing boiler in design. The advantage of the floor-standing one is higher power, the wall-mounted one is compactness. The power of the unit is selected at the rate of 1 kilowatt per 10 squares plus 10% of the stock.

For small house a boiler with a high output is not needed. Compact and eco-friendly wall model can be hung in the kitchen, no need separate room under the boiler room.

Video about the principle of operation of the condensing boiler.

In the production of heating systems, the most promising innovative technology is the condensation of water vapor, which is formed during the combustion of hydrocarbons. Condensing boilers work according to this principle. This new heating equipment has recently appeared on the Russian market, but it already enjoys considerable consumer demand. Condensing boilers from both foreign and domestic manufacturers are on sale.

A wide range of condensing boilers is offered by BAXI, which, thanks to high quality of its products, has become the leader of the Russian market of boiler equipment. Condensing boilers Baksi are floor-standing and wall-mounted condensing boilers characterized by a high coefficient useful action... Others famous brands boiler equipment in the domestic market can be called condensing boilers vaillant and visman.

Condensing boiler

Combustion and Condensation Principles

Any hydrocarbon fuel generates heat during combustion. In the process of fuel combustion, the end products become carbon dioxide(CO 2) and (H 2 O) water, which turns into steam under the influence of high temperatures. Evaporation, water expends heat, but it can be recovered in the process of condensation, that is, if water from the gaseous phase goes back to the liquid.

How condensing boilers work

The principle of operation of condensing boilers was known for a long time, but it was impossible to use it in boiler equipment made of cast iron and steel, since water condensate, having high acidity and containing carbon dioxide, caused corrosion of steel and cast iron boilers. Only with the advent of corrosion-resistant alloys and stainless steel has it become possible to introduce this technology into the production of boiler equipment.

As we already know, when cooled, the steam turns into a liquid state again and releases a certain amount of heat. If we consider a conventional boiler, then during its operation there is a struggle with the condensation process, and in condensing boilers, condensation is only welcomed. Their design provides for a special heat exchanger, in which the condensation process takes place, and the heat released during this process is taken away for the heating system

The condensing boiler has an efficiency of 108-109%. How is this possible if, according to the laws of physics, the efficiency cannot exceed 100%, since energy losses in any processes are inevitable.

In non-condensing boilers, during gas combustion, not all of the heat energy is taken away, but only a large part of it. The heat flow in the heat exchanger is cooled only to a temperature of 140-160 ° C, when it is cooled to a lower temperature in the chimney, the draft decreases, aggressive condensate is formed, which causes corrosion of the boiler elements. Thermal energy, which can be obtained during the condensation process in conventional boilers, is not used, it is called hidden.

Condensing gas boilers use in their work the energy latent in condensing water vapor, therefore, their efficiency, in comparison with the efficiency of conventional boilers, exceeds 100%. The main element of any boiler is a heat exchanger. There are two heat exchangers in the construction of condensing boilers. They can be separate or combined (two-stage). The first heat exchanger works in the same way as in conventional boilers. A heat flux passes through it, but does not cool below the dew point. The second condensing heat exchanger removes the heat from the flue gas and cools it down to a temperature below the dew point.

Water vapor condenses on the walls of the second heat exchanger and gives off latent thermal energy to the water. At this moment, additional heat is taken from the combustion products, their temperature at the exit from the heat exchanger is only 10-15 ° C higher than the temperature of the coolant.

To solve the problem of corrosion caused by aggressive condensate, manufacturers use materials that are resistant to corrosion and chemical attack in the manufacture of boilers (stainless steel, silumin (aluminum-silicon alloy)).

In Europe, and in particular in Germany, there are regulations requiring the neutralization of condensate before being discharged into the sewer. The neutralizer is a container with magnesium and potassium granules. Passing through these alkaline reagents, the condensate is neutralized, and when it is discharged into the sewer, it does not pose a danger to environment... In Russia sanitary standards do not require neutralization of condensate, therefore, it is simply collected in a special tank provided in the boiler design, and, as a result, is discharged into the sewer in its original form. In boilers with a capacity of up to 30 kW, intended for heating private houses, about 30 liters of condensate are formed in 24 hours of operation.

Advantages and disadvantages of condensing boilers

Wall mounted heating boiler

Condensing gas boiler can be called one of the most economical and highly efficient heating devices. Its efficiency is 10-15% higher than the efficiency of traditional boiler... In addition, condensing boilers are 20% more economical than conventional boiler equipment.

In the construction of condensing boilers, high-tech burners are used, which prepare fuel-air mixtures in optimal proportions, which minimizes the possibility of incomplete combustion of fuel. This reduces the amount of emissions of harmful substances.

The flue gases have a low temperature (below 40 ° C), which makes it possible to use plastic flues for condensing boilers, thereby reducing the cost of installing the heating system.

The advantages of condensing boilers include:

• small dimensions and low weight of boiler equipment;
• profitability (gas saving is 35% per season);
• deep modulation (gas saving at partial loads);
• low vibration and low noise level;
• the possibility of cascade installation;
• savings on the chimney (you can install chimneys with a smaller diameter);
• reduction of emissions of harmful substances NO X and CO 2 (7 times lower than that of conventional boilers).

Condensing boiler cascade

Due to the small size and low weight of the boiler equipment, the installation of the boiler requires less space, at the same time, the costs of its transportation and installation are reduced. There is such a misconception that condensing boilers work effectively only with a floor heating system. In another case, their efficiency is no more than that of traditional boilers. But this is not the case. The design of the condensing boiler has a modulating burner, which allows achieving deep power modulation, while reducing the consumption of gas and air.

The condensation process in the boiler continues during operation heating equipment with a radiator heating system. At low loads, the efficiency of a condensing boiler may well reach high values, in contrast to conventional gas boilers, in which the efficiency in this mode drops due to an excess of air.

For cascade installation of condensing boilers, manufacturers offer special regulators (for example, BAXI sells the RVA47 regulator for its boilers), which turn boilers installed separately into a single system.

The advantages of the cascade system are ease of installation and compact size of the boiler room. Due to reduced vibrations and low level noise when installing condensing boilers, there is no need to make vibration-insulating platforms and soundproofing the room intended for the boiler room. Which also allows you to save cash when installing the heating system.

The fan operating in condensing boilers allows saving on the size of the chimney. It develops a fairly high pressure, so the diameter of the chimney can be half as much as when installing a heating system with traditional boilers.

Due to their low NO X and CO 2 emissions, condensing boilers belong to the category of environmentally friendly equipment; they are often used to equip boiler rooms in resort and protected areas. It is very difficult to find flaws in condensing boilers. The main disadvantage of this heating equipment is the high price, which is twice the price of conventional boilers.

Application

By outward appearance condensing boilers are not much different from traditional ones. They are made in wall version and outdoor version. Wall-mounted gas condensing boilers have less power than floor-standing boilers and are used in everyday life for heating private houses and cottages.

Floor standing condensing boilers with high power are used for heating industrial facilities and office premises.

Condensing gas boilers produce single and double-circuit. Are applied double-circuit boilers for both heating and water heating. The capacity of single and double-circuit boilers is 20-100 kW. This is enough for household use boilers. For industrial use, models of higher power are produced.

The main differences in the design of condensing boilers from conventional ones

Condensing boilers differ from traditional material used for the heat exchanger. Their heat exchanger is made of acid-resistant silumin alloy or stainless steel. The condensation water formed in the boiler is acidic and corrosive to materials such as steel and cast iron, which are used in the production of non-condensing boilers. The shape of the heat exchanger is a complex section pipe with additional spiral ribs. This shape of the heat exchanger increases the heat exchange area and increases the efficiency of the boiler.

In condensing boilers, a fan is installed in front of the burner, which "sucks" gas from the gas pipeline and mixes it with air, after which it directs the gas-air mixture to the burner.

Condensing boiler device

Flue gases are removed through coaxial flues made of heat-resistant plastic. In addition, condensing boilers have an electronically controlled pump that optimizes the heating output, saving energy and reducing the noise from the heating medium flowing through the heating system.

The design of traditional boilers does not provide for the condensation process and the use of indoor energy, therefore the temperature of the combustion products is maintained at high level... Part of the heat in such boilers is not used, but is removed with the combustion products through the chimney.

Since condensate is chemically aggressive, in order to use it, boiler elements must be made from chemically sustainable materials, the cost of which is quite high. It is much easier for manufacturers to sell cheaper goods than to invest in advanced but expensive technologies. Therefore, most of the boilers on the market are based on outdated technologies. For users, it is more profitable to buy, albeit expensive, but more efficient condensing boilers, which save on fuel consumption.

Manufacturers offer for their condensing boilers connection kits, condensate neutralizers, expansion tanks, safety devices, boiler piping kits, flue gas removal systems.

In European countries, condensing boilers are the most common type of heating devices. There are countries where the installation of non-condensing boilers is prohibited. The reason for this is the higher efficiency and lower emission of harmful substances in condensing boilers.

Operation of the traditional gas boiler entails some loss of thermal energy along with combustion products. Another negative point is the formation of chemically aggressive condensate, which causes corrosion in the system.

The condensing boiler cools the flue gases below the condensation point. The result is the condensation of water vapor with the release of latent energy to the coolant, which heats up in the boiler.

The principle of operation of condensing boilers

When gas is burned in condensing boilers, the effect of the formation of high-temperature water vapor occurs. The released vapors are concentrated as a liquid on a stainless steel heat exchanger. Standard types of gas heating equipment remove steam along with the rest of the waste products of combustion through the chimney.

When steam accumulates on the primary heat exchanger, heat is generated and returned back to the heating system. This principle of operation of condensing boilers ensures high efficiency rates and efficiency of the entire heating system.

Features of functioning

Condensing boilers are devices with closed combustion chambers. Waste products are discharged to the outside forcibly... Moreover, they all have a minimum temperature. The presence of an additional heat exchanger makes it possible to increase the resistance to the passage of substances formed during the combustion of fuel. This principle functioning makes the effect of natural draft impossible. That is why the condensing gas boiler works on the basis of the forced draft principle.

Condensing boilers have closed chamber combustion with exhaust gases removal by means of special turbines. This has its advantages, since the combustion products can be removed to any place outside the heated building, moving along the supply and outlet channels.

The condensing boiler can be installed in houses without a chimney. This solution is safer compared to the operation of traditional gas boilers, since the combustion process is completely isolated from the room where the heating unit is installed.

Application

Wall-mounted condensing gas boilers, like floor-standing models, are mainly used in radiator heating systems or, if necessary, to equip a warm floor.

A prerequisite for creating a condensation effect is maintaining a certain temperature of the water in the return line. It is important that the coolant remains colder than the temperature at which condensation forms. If this condition is met, the condensing gas boiler will provide maximum operating power throughout the year.

Efficiency

How to achieve the highest efficiency rates by operating a condensing boiler? Compared to conventional gas-fired units, condensing units are designed to use heat from condensation. Thanks to this, it becomes realistic to achieve indicators of efficiency at the level of over 100%.

In case of combustion natural gas in standard heating boilers, the useless consumption of thermal energy, which could be used with benefit, is about 11%. Assuming that thermal power boiler as a result of fuel combustion is 100% and adding to this indicator 11% latent heat, a heat output of 111% can be achieved.

In order to obtain high efficiency rates when operating a condensing boiler, it is recommended to connect the heating unit with external sensor ambient temperature. This makes it possible to maintain a stable temperature level. return water at the required level to effectively use the condensation effect.

Safety

Due to the presence of the effect of preliminary connection of gases and air in the corresponding burners, the wall-mounted condensing boiler produces a minimum amount of harmful substances from the exhaust combustion products.

If we draw a parallel with traditional boilers, then here the reduction in the amount of CO and NOx is from 80 to 90%. It is for this reason that, recently, in highly developed countries, condensing units are increasingly used as heating devices.

Advantages

Condensing heating boilers are newest word in the development of innovative technologies. A profitable solution for the consumer, such devices become due to a noticeable reduction in fuel consumption. Currently, this technology is considered one of the most economical in space heating. The decrease in gas consumption during the heating season here is about 35%.

Achieving such impressive results becomes possible due to the following factors:

• the emergence of the process of heat transfer from condensation both in heating mode and in heating water for domestic needs;
• high efficiency rates;
• the ability to achieve a comfortable temperature for living in the absence of significant heat loss;
• availability ample opportunities to modulate the flame.

A gas condensing boiler is a relatively new concept in the field of heating technology. Distinctive feature equipment is high efficiency, especially at low temperature conditions. The units have been designed to save energy, improve efficiency and improve environmental performance. The most famous companies: Vaillant, Baxi, Viessman, Ariston, Bosh manufacture boilers using innovative technologies that meet all standards.

To understand what a condensing gas boiler is and how it works, you need to understand its functioning. In conventional heating units, combustion products are removed to the atmosphere at a temperature of 100-170 ° C with water vapor, reducing the efficiency. Thermal energy, intended to improve the efficiency of the carrier, is emitted through the chimney along with the waste.

The principle of operation of a condensing boiler is the reverse exchange process, in which latent heat is taken from the extracted air and transferred to the room. The recuperation efficiency factor is the ratio between the maximum possible energy received and its actual value. Depending on the power of the unit, the indicator can reach 90% efficiency. Smoke is emitted from such condensation products through coaxial chimney... Automation allows you to select the necessary conditions for the fan blowing air at a variable speed.

The device for the heating device differs from similar standard types the fact that the boiler is equipped with an additional heat exchanger (separate or combined), to which the medium is supplied to reverse course out of the contour. Condensation depends on pressure, fuel type, oxygen and gas concentration. When a dew point forms on the body of a gas boiler, the carrier heats up, therefore, it comes to the base from more high temperature... The required energy is created in a short time and with low resource costs.

To prevent the negative effects of water vapor, the exchangers are made of stainless steel or silumin. Also, the specificity lies in the features of the burner, which ensures the optimal ratio of gas and air, constantly monitoring the process in the condensing unit. The closed combustion chamber is isolated from the room, which guarantees the safe operation of heating equipment.

Model Description

Well-known manufacturers of heating equipment offer wall and floor-standing boilers, with one and two-pipe wiring. Like any device, these devices have their pros and cons. To have an idea of ​​the offered condensing gas boilers, you can consider the products of several companies:

The devices are intended for use in apartment buildings and private houses, for industrial facilities. The Vitosolar-300F is a compact unit with a 800 liter solar-powered heater. Also included in the package are expansion tank, pump, pipelines, mixers, condensing gas boiler. All elements are mounted in a single unit, which provides convenience and ease of installation. The burner and radial heat exchanger are made of stainless steel. With the help of built-in electronics, operation is controlled in a predetermined mode, depending on the air temperature in the room.

Viessman Vitodens-300V - wall model with an efficiency factor of 98%, a MatriX burner, a diagnostic unit. The gas boiler unit collects data from sensors, measures the speed of movement of the carrier and transmits the received information to the switch, which is triggered when energy consumption decreases. Thanks to the Smart system, the risk of breakage is reduced to zero.

A distinctive feature of the condensing units of this company is high performance combined with compact dimensions and low weight. By the way of heating there are single and double circuit systems with a natural and compulsory method. The Pro series includes Atmo TEC pro VUW equipment. It is produced in standard and reduced versions, power - up to 24 kW. Equipped with a closed combustion chamber and turbocharged smoke exhaust.

The Vaillant TEC plus VUW single-circuit device with natural smoke extraction ensures high-quality heating and allows the connection of a water heater. Automation allows you to control processes and set the temperature. With the help of a valve with a built-in stepping motor, wall-mounted gas heating boilers smoothly reach the required power level.

Judging by consumer reviews, the condensing boilers of this company are especially effective in homes without a centralized water supply. All types can operate on liquefied gas, the temperature is controlled in two modes: 30-85 ° C and 30-45 ° C for underfloor heating. The electric gas boiler Baxi ECO Compact is adapted to any fuel, equipped with an auto-ignition, modulating burner and ionization flame control. The exhaust gases pass through an open combustion chamber.

DUO-TEC is a double-circuit heating device with the ability to connect an external storage boiler. It has a control panel with an accessible display, built-in automation that reacts to climate. The gas condensing boiler provides control over the multi-temperature zone systems.

Each model can connect to solar collectors, equipped with a high-speed plate exchanger for efficient heating... The feeding and mixing system provides an optimal gas-to-air ratio. The burner is designed for 25 years of service. A membrane expansion tank is installed in the GAZ 2000 brand, circulation pump with deaerator and three speeds.

The gas boiler Condens 2000 W ZWB can operate at a pressure of 5 bar, according to customer reviews, it is adapted for apartment buildings and private houses. Natural or liquefied gas is used as fuel with a maximum flow rate of 2.5 m3 / h. The hot water output is 12 l / min.

Customer reviews

Based on consumer opinions about different models and the principle of operation of gas boilers, taking into account all the pros and cons, you can make a choice of suitable equipment for heating a house and hot water supply:

“I installed a solar system in my house in order to save money, I needed to buy the appropriate heating equipment. The condensation-type technique suits me best. Atmo TEC pro VUW from the German manufacturer Vaillant has been operating for two years without interruption. Provides not only all rooms, it is perfectly combined with warm floors... The electronics are sensors and a screen with an accessible interface that control all modes according to the specified functions. "

Victor, Moscow.

“Condensing boilers are quite comfortable and functional. But in order to save money, it is important that the temperature of the coolant is maximum 60 ° C. In our house with an area of ​​300 m2, a Vitosolar-300F double-circuit is installed, which is manufactured by Viessman. On especially cold days, the radiators were quite hot, the flow did not exceed 50 ° C. At the same time, the gas consumption was about 1,000 m3 per month. We noticed that for such devices it is necessary to use clean water. Competent approach to operation ensures uninterrupted operation and long service life. "

Vadim, St. Petersburg.

“They planned to buy a gas condensing boiler at the design stage of the house. The only question was about the manufacturer. They trusted the Italian company Baxi and chose the ECO Compact model. It copes well with heating when low temperatures also provides hot water... The automation system is convenient: set the mode - and you don't have to worry. Impressed by the aesthetic design. Many friends have such equipment, the reviews are the most positive. Even in severe frost the house is warm. "

Anna, Kiev.

“When we decided to buy a new boiler, the question arose about savings. I wanted to choose a device that meets all the requirements. After looking through several options and re-reading many reviews, we settled on the German company Bosh. They have a huge model line condensing devices with different power and capabilities. The GAZ 2000, which we installed three years ago, only showed itself with better side... Convenient automatic control, beautiful design, quality service. We plan to mount in a year solar system as this brand is perfect for her. The savings will increase several times, so the rather high price fully justifies itself. "

Maria, Kharkov.

Summary

Summing up, we can note the pros and cons of such boilers for heating:

1. Low noise and vibration level.

2. High efficiency.

3. Improving the emission of combustion products by half.

4. Reducing the release of harmful substances into space.

5. Compact size and light weight.

6. The efficiency of fuel consumption is increased by 30%.

7. Possibility of installing solar systems.

As with any equipment, gas condensing boilers have disadvantages:

• Quite a high price.
• The work involves the loss of condensate, therefore, it is required to think over a system for removing its excess.
• Possibility of operation only in low temperature mode.
• Volatility.

Price overview

The cost of condensation products from different manufacturers is formed based on the power and technical characteristics... The table shows the models of the most famous brands and their prices:

Wall-hung condensing boilers are highly efficient, economical equipment that can be installed both for new heating elements and for existing ones.