Single-stage, two-stage and modulating gas burners

Selecting a burner correctly is an important step in the construction or repair of a boiler room. The further operation of the heating equipment depends on how responsibly the managers and organizers approached this issue.

Modernization of the heating sector is the most important task facing managers of housing and communal services. Choosing a partner for the design, supply, installation and commissioning of equipment is not a problem, but the question of the efficiency of operation of boiler houses after their conversion remains open. A limited budget forces you to find the simplest solutions - purchase cheap, short-lived equipment that requires constant attention. But now there are fully automated systems, for the selection and maintenance of which it is best to contact highly qualified specialists who have a complete understanding of how a modern boiler room should function.

When choosing burners, consumers are faced with a difficult task: what to give preference to - domestic or foreign equipment. And here sellers of imported burners often use a cunning trick: they compare smooth two-stage burners of foreign production with modulated burners of domestic production. Even with a significant difference in prices for “similar” products, they insist on German, Finnish, Italian quality, trying to persuade buyers to purchase these particular burners. However, any specialist working with boiler equipment understands that comparing different types of burners only based on the price component is at least incorrect. Therefore, it is necessary to know the difference between their technical characteristics and capabilities.

Table for calculating fuel savings when installing modulating burners compared to staged burners

The most widespread in boiler houses are two-stage, smoothly two-stage and modulating burners. Two-stage burners, as the name suggests, have two power levels. The first stage provides 40% of the power, and the second - 100%. The transition from the first stage to the second occurs depending on the controlled boiler parameter (direct water temperature or steam pressure), the on/off modes depend on the boiler automation.

Smooth two-stage burners allow a smooth transition from one stage to the second. This is a cross between a two-stage and modulating burner. Modulating burners heat the boiler continuously, increasing or decreasing power as needed. The range of combustion mode changes is from 10 to 100% of the rated power.

Of course, modulating burners are more expensive than stepped models, but they have a number of advantages over them. The mechanism for smooth power control allows you to reduce the cycle of turning on and off boilers to a minimum, which significantly reduces mechanical stress on the walls and components of the boiler, and therefore prolongs its “life”. Fuel savings are at least 5%, and with proper tuning you can achieve 15% or more

. And finally, installing modulating burners does not require replacing expensive boilers if they are functioning properly. When staged burners operate, the boiler experiences significant loads, which eventually destroy the unit.

Against the background of the disadvantages of stepped burners, the advantages of modulating burners are obvious. The only factor forcing managers to choose step models is their lower price. But savings of this kind are deceptive: wouldn’t it be better to spend a large sum at a time on more advanced, economical and environmentally friendly burners, especially since these costs will pay off in the next few years?

Smart managers understand the benefits of using modulating burners, and now all they have to do is select the necessary models. Which manufacturers are best to contact? Even with a superficial study of prices for imported and domestic burners, it is clear that the difference is quite significant. Some models from foreign manufacturers are more than twice as expensive as Russian-made products. And yet, stereotypes that quality goods come only from abroad force people to pay more. However, a more detailed analysis of the market for burner manufacturers shows that we also have high-quality competitive products. For more than 15 years, the Starorussian Instrument-Making Plant has been producing various models of burners that are successfully installed on all types of domestic and imported boilers. Modulating block burners from this manufacturer comply with all environmental standards for fuel combustion, have a wide range of power control (from 10 to 100%), while ensuring maximum efficiency. When looking for reliable, economical burners for boiler rooms, it’s simply impossible not to pay attention to them. Simple installation of equipment already produces tangible results, and if experienced burner adjustment specialists are involved in the process, fuel savings can amount to more than 15%. With the use of modulating burners from Staroruspribor, managers will be able to temporarily forget about another cost item - replacing the boiler. Switching to a “gentle” operating mode allows you to double its service life

. Those who know how expensive such equipment is (prices are calculated in millions of rubles) will appreciate the possibility of replacing these units more rarely.

Selecting a burner correctly is an important step in the construction or renovation of a modernized boiler room. The further operation of the heating equipment depends on how responsibly the customers approach this issue. If, for example, you use modulating burners produced by JSC “, then after two or three heating seasons the costs will be more than recouped. Stable operation, compliance with environmental standards, longer service life of boilers and the ability to fully automate the operation of a thermal power plant indicate significant advantages of using modulating burners in boiler houses. And if the benefit from their operation is obvious, not taking advantage of it is simply unreasonable.

Important flame modulation function

What is the modulation level of a gas boiler burner? In simple words, this is a mode for automatically changing the flame intensity. This flexible setting allows you to save on fuel consumption, because the strength of combustion will depend on how hot the water flows from the tap.

The temperature inside the heating system is constantly changing, and the boiler’s task remains to maintain it at the same level. Modulation allows the owner to set the optimal temperature indicator, which the device’s automation will focus on. She will be able to control the functionality of the water heating device in accordance with the task.

Modern double-circuit boilers are equipped with modulating burner equipment out of the box.

Basic elements of an automatic control system

Devices included in the electrical circuit of the burner for automatic operation:

1. The maximum and minimum gas pressure switch has a simple design, which affects its long service life. Its principle of operation is that the gas pressure acts on the membrane, and if it deviates from the set value, it is triggered and the control valve makes the necessary adjustment. The minimum gas pressure switch protects against a drop in gas pressure to a critical value, and the maximum pressure switch carries out regulation, preventing the permissible value from being exceeded.
2. The thermostat is an indicator of reaching temperature limits. According to its signal, the combustion modes change.
3. The combustion controller is an element that combines the operation of the entire burner into a single process. The burner operation is divided into several points, which correspond to a certain position of the air damper and the fuel control valve. When a low temperature signal is received, the corresponding mechanisms open to increase combustion power. The controller's operation is based on signals from various sensors (pressure, temperature).
4. Minimum and maximum coolant pressure relays protect the heating system from excessive drops and increases in coolant pressure. Both cases are dangerous for the continued operation of the boiler, therefore, when a critical value (lower or upper) is reached, the boiler turns off, that is, the gas supply stops.
5. The boiler filling sensor is needed to provide protection against turning on the burner without the presence of coolant in the boiler.

Connecting the sensors depends on the brand of the boiler; this information can be found in the unit’s passport, and the specifics of connecting the sensors are described in detail in the attached instructions.

The connection and configuration of the automation system must be supervised by a gas service specialist. Commissioning work is also carried out in his presence with the mandatory drawing up of a certificate of suitability of the equipment for safe operation.

Gas

The work uses the cheapest fuel to maintain flame stability and silent combustion. Such burners ensure complete combustion of gas and the absence of harmful emissions. They can process both liquefied gas and natural gas.

The launch takes place in a matter of seconds. Some models are equipped with a self-diagnosis system. The equipment is installed in gas boilers, heat generators, and is also used for metallurgical furnaces, power plants, welding and construction work.

Having considered what flame modulation is in a gas boiler, you can familiarize yourself with the design of the burner. It consists of:

• extended or regular head;
• gearbox and fuel supply regulator;
• microprocessor for automatic operation;
• nozzles spraying the gas-air mixture;
• ignition systems (piezoelectric element).

The burner mixes gas with air and burns the resulting mixture. This helps maintain an even flame.

In turn, gas burners are divided into several classes according to the method of formation of the fuel mixture:

• Diffusion. Natural air supply. They are used in boilers for heating systems, glass melting and steel furnaces.
• Supercharged. Air injection by fan.
• Injection. Air suction depends on the pressure of the gas jet. They work with natural gas. For propane, you will need to install an additional kit to the cylinder.

How does the automatic safety system for gas boilers work?

Domestic heating boilers using natural and liquefied gas do not require constant monitoring by the user. Combustion and maintenance of the required coolant temperature are monitored by electronic and mechanical units built into any heat generator by the manufacturer. Our task is to explain how automation for a gas boiler works and what types of devices are used in modern water heating installations.

Modulation operating principle

What is a gas water heater with flame modulation? This is a unit with a burner that continuously heats the boiler, smoothly regulating the power of the device. The combustion mode is measured in the range of 10-100% of the rated power.

When the time approaches to shut down the burner equipment, the electronic system sends a signal with a command to reduce the amount of gas supplied to the valve. The combustion power decreases. The boiler or heater does not turn off.

For example: a certain amount of water with a temperature of 40 degrees passes through a gas water heater. If the liquid flow suddenly increases, the burner automatically increases power in order to maintain the water temperature at the same level. Accordingly, if the flow rate decreases, the modulation will switch to a more economical power mode.

It is worth remembering that some speaker models do not support automatic power changes depending on the flow. In such cases, the user adjusts the burner parameters manually.

An example of modulation can be seen here:

To understand flame modulation in a gas boiler, what it is, you need to familiarize yourself with the operating principle of modulated burners. According to this criterion, they are divided into three categories:

• Mechanical.
• Pneumatic.
• Electronic. This is the most accurate type of burner equipment, since it eliminates errors associated with mechanical factors.

Automatic blocks of floor-standing boilers

The vast majority of floor-standing gas boilers are equipped with automatic safety systems that operate without an external power source (non-volatile). According to the requirements of regulatory documents, automation equipment must shut off the gas supply to the burner and igniter in three emergency cases:

1. Extinction of the main burner flame due to blowing out or for other reasons.
2. When natural draft in the chimney channel is absent or sharply reduced.
3. The drop in natural gas pressure in the main pipeline is below a critical level.

For reference. The implementation of the listed functions is mandatory for gas boilers of all types. Many manufacturers add a fourth level of safety – overheating protection. When the coolant temperature reaches 90 °C, the valve, based on a signal from the sensor, stops supplying gas to the main burner.

Various models of gas floor-standing boilers from different manufacturers use the following types (brands) of non-volatile automation:

• Italian blocks EuroSIT (Eurosit) series 630, 710 and 820 NOVA (heating units Lemax, Zhitomir 3, Aton and many others);
• Polish devices "KARE" (heat generators "Danko", "Rivneterm");
• American automatic control devices Honeywell (Zhukovsky heaters);
• domestic products, "Arbat".

Fuel supply system in the simplest AOGV devices equipped with ZhMZ valves. The burner is hidden in the lower part of the housing.

Advantages of boilers with modulation function

After we have figured out what flame modulation in a gas water heater is, we can familiarize ourselves with the advantages of such models. There are several of them:

• Constant water temperature in the tap and shower, without interruptions or surges.
• Saving resources. Throughout its “life”, the boiler operates at maximum power 20% of the time. This figure can be significantly reduced by using a modulated burner.
• Fuel economy. The modulated burner allows you to achieve 5% fuel savings. If you configure the element correctly, this figure can be increased to 15%.
• Reducing the number of turns on/off of the unit, and, accordingly, relieving mechanical stress in the components and on the walls of the boiler. And as a nice bonus, the constant “clack” of the unit is eliminated.
• High level of automation for any heating and heating systems.
• Weather-compensated regulation.
• Application in production with strict technological requirements. Some processes do not allow even the slightest temperature changes, so modulating burners are just what you need.

Classification of gas burners by type of temperature control

With the development of technology, new, improved methods of automatic temperature control have been developed:

1. Single-stage burners are primitive devices; their operating principle is described above. They work in the same mode.
2. Two-stage burners are devices capable of operating in two modes (40 and 100% of total power), automatically switching between them.
3. Smooth two-stage burners are burners operating in two modes (40 and 100%), but their switching between modes is carried out more smoothly, which significantly increases fuel economy and the quality of temperature maintenance
4. Modulating gas burners are the most functional devices, capable of operating in a wide power range (from 10 to 100%). Such burners are capable of maintaining temperature conditions with a deviation of only 20C from the set value. At the same time, the efficiency of fuel combustion increases and the temperature loads on the elements of the heating unit are reduced.

The copper heat exchanger is the most efficient of all, as it has good thermal conductivity and thin walls. But it does not tolerate high temperature stresses well, and therefore has a short service life. In combination with a modulating burner, its service life becomes longer.

Gas burners with the ability to change the degree of combustion are expensive, but their efficiency will quickly pay for the costs:

• saving up to 30% of fuel;
• temperature is maintained within a narrow range;
• the service life of the entire unit increases.

Read about the benefits of installing a magnesium anode for a boiler in the article.

You will find information about TGE universal multi-fuel boilers at the link -

Briefly about the main thing

Modulating burners are a good way to save on fuel and also extend the life of gas equipment. The operating principle of such installations is to automatically adjust the boiler power to maintain the set temperature and reduce the on/off cycle of the unit. This is not just another marketing ploy, but a truly reliable and practical solution for both home heating and water heating systems, and for industrial equipment.

In your opinion, is it worth spending money on modulating burners? Or maybe it’s better to opt for cheaper step options?

Automatic temperature control system

The most primitive system for automatic control of a set temperature with the participation of a gas burner works as follows: gas is supplied to the burner, ignited by the ignition system, and stable combustion occurs. In this case, the burner operates at full capacity.

When a certain temperature value of the coolant or air in the room is reached, the burner goes out. To maintain the set temperature, it is constantly turned on and off.

Modulating gas burner operating principle

Single-stage, two-stage and modulating burners for heating boilers. Review.

When choosing burners, consumers are faced with a difficult task - which burner to choose. This choice allows them to make a small comparison of burners from different manufacturers by type of regulation and level of automation of the burner device.

We invite you to familiarize yourself with the opinion of our company’s specialists, based on the experience of using combined, liquid fuel and gas burners from Weishaupt, Elco, Cib Unigas and Baltur.

Let's determine the basic requirements for burners, depending on the application. Depending on the area of ​​application, burners can be divided into groups.

Group 1. Burners for individual heating systems (in this group we include burners with a power of up to 500 - 600 kW, which are installed in boiler rooms of private houses, small industrial and commercial and administrative buildings).

When choosing burners for this group of consumers, it is necessary to take into account the buyer’s wishes in the level of automation of an individual boiler room:

· if you do not have high technical requirements for the installed equipment and want to have a reliable boiler room that does not require large initial financial investments, then you can opt for burners with single-stage or two-stage operating modes;

· if as a result you want to build a heating system with a high level of automation, weather-dependent regulation, as well as low fuel and energy consumption, then you are better off using modulating burners or burners with smooth two-stage regulation, which will provide the ability to program power and a wide operating range of burner regulation .

Group 2. Burners for heating systems of large residential complexes (in this group we include burners with a capacity of more than 600 kW for the needs of housing and communal services, central heating, as well as for heat supply of large industrial and commercial and administrative buildings).

Comments

Smooth flame modulation - what is it?

There are quite a lot of criteria for choosing heating installations or instantaneous water heaters in which the heat source is a burner. All of them, as a rule, are known to most potential buyers. But to the question of what flame modulation is, only a few will answer correctly; tested, and more than once. But this is far from an insignificant factor, and it should definitely be taken into account when assessing the feasibility of purchasing equipment. That is, ask whether the device you like has such a function or not. So why is it needed and is this engineering solution just another marketing ploy, the purpose of which is simply to increase the price of the product without improving its functionality?

What is flame modulation?

In relation to the burner, the “decoding” of this term is quite simple - the possibility of flexible (and therefore smooth) control of its operating modes. Depending on external factors, the temperature in the heating circuit is constantly changing, while the boiler must maintain it at the required level. The optimal value is set by the user, and the device’s automation is already “oriented” towards a specific value, controlling the operation of the installation (by adjusting its power at the moment).

In traditional boiler models, burners are either unregulated (outdated versions) or two-stage (more modern versions). But even this improved performance is not without its drawbacks. In order to select the optimal mode and better adapt to real conditions, such burners switch to another in jumps. Consequently, there is no need to talk about any smooth control, that is, precise temperature control.

Types of flame modulation

In practical terms, there is no big difference between engineering solutions, since they all pursue the same goal - to optimize the operation of equipment. There are only small but fundamental differences in the circuit design and its individual elements.

• Electronic modulation - in such burners, power is controlled by dosing the fuel supply depending on changes in coolant temperature.

A typical example is the boiler of the famous brand “Proterm” (Bear series) KLOM, which has a built-in boiler to provide domestic hot water.

• Hydraulic modulation - this method is implemented, as a rule, for DHW. Most often in instantaneous water heaters (gas water heaters). The sensor detects changes in water flow (its consumption) and transmits the corresponding command to the control valves, changing the supply of “blue fuel”. • Ionization modulation - with this method, the flame is controlled by a special sensor. He also controls the operation of gas fittings.

Types of automatic control systems for gas boilers

There are control systems of various brands and purposes, but they all work on similar principles, the only difference being the functionality of the system and its dependence on the electrical network.

All equipment can be combined into three main groups:

• non-volatile;
• volatile wired;
• volatile wireless systems.

The non-volatile gas boiler control system is the very first automation for heating equipment. Its operating principle is based on the physical law of expansion of a material when it is heated.

The approximate effect of this law can be considered using the example of a thermometer - when heated, mercury expands and rises up the tube attached to the scale. The reverse process occurs upon cooling.

To learn about the operating principle of combi heating boilers, click here.

For information on how to create a kitchen design with a gas heater, read the information at the link -

Also read about the Buleryan furnace-boiler, the principle of its operation and the main types.

Now imagine that a similar design is installed inside the boiler and measures the temperature of the heated coolant, only instead of mercury, another material (metal) is used.

When heated, it expands and acts on a lever mechanism that stops the gas supply. As soon as the coolant cools down, the metal contracts, acts on the lever, and the gas supply is resumed.

The energy-dependent gas boiler control system operates from the electrical network - this creates inconvenience, but in return the functionality of the equipment increases. The main element of such systems is a thermostat.

Depending on the temperature conditions, it supplies an electromagnetic pulse to the gas valve. But with the help of a special program, it becomes possible to program the temperature regime for several days, weeks or months in advance.

The non-volatile wireless gas boiler control system operates on the same principle as its wired counterpart. The difference is that the wireless automation control module is located in any place convenient for the user, and is not connected by wire to the unit.

Some systems provide for the installation of a GSM module, which provides access via a mobile device (smartphone, tablet). To get the latest data on the status of the equipment, you need to go to the application on your phone and enter the password.

Through a mobile device, it is possible not only to control, but also to control the boiler. And if an emergency occurs, the system automatically sends a notification in the form of SMS to the specified number.

Modern technologies are capable of providing full automatic control over the operation of an autonomous heating system, without creating unnecessary hassle.

Modern heating and hot water systems use various types of burners to ensure reliable and efficient operation. The choice is most often related to the characteristics of the installation location and the requirements for heating equipment.

Staged burners provide power control in 1-3 modes, which is not enough in many production processes. To increase the reliability and efficiency of boilers and heat generators, burners with automatic power control are installed.

What does flame modulation do?

Those who take a practical approach to any task and are accustomed to spending money rationally should pay attention to these types of devices. The meaning and benefits of smooth flame control are easy to understand.

• Fuel consumption is optimized. Automatic regulation of flame intensity makes it possible to achieve - in terms of the season - a reduction in the cost of heating the building. • If the boiler is double-circuit, then the volume of consumed hot water does not affect its temperature in any way - it remains unchanged. • A decrease in gas pressure in the main pipeline (and this is not uncommon in winter) does not affect the efficiency of gas equipment. • The risk of failure of some boiler elements is minimized. Statistics on equipment repairs (of any type) show that the main cause of all malfunctions (up to 90%) is various switching. Therefore, step modulation clearly loses to smooth power control.

Practical recommendations

ALFATEP has been working in the field of engineering communications for several years. She will always help owners of buildings located in the Moscow region in solving problems related to heating buildings and structures. Its warehouses have a significant assortment of relevant equipment, and its staff includes qualified craftsmen. You just need to call the ALFATEP contact phone number, and its employees will help you choose the optimal boiler model, taking into account all the features of the house and the heating scheme. If necessary, they will develop another one, deliver the device to the site, install it, carry out proper wiring and test it in action. The company also guarantees technical support for the devices sold, and service specialists (upon concluding a contract) are ready to take on the responsibilities for post-warranty maintenance and repair of equipment.

Comparison of staged and modulating burners

Selecting a burner correctly is an important step in the construction or repair of a boiler room. The further operation of the heating equipment depends on how responsibly the managers and organizers approached this issue.

Modernization of the heating sector is the most important task facing managers of housing and communal services. Choosing a partner for the design, supply, installation and commissioning of equipment is not a problem, but the question of the efficiency of operation of boiler houses after their conversion remains open. A limited budget forces you to find the simplest solutions - purchase cheap, short-lived equipment that requires constant attention. But now there are fully automated systems, for the selection and maintenance of which it is best to contact highly qualified specialists who have a complete understanding of how a modern boiler room should function.

When choosing burners, consumers are faced with a difficult task: what to give preference to - domestic or foreign equipment. And here sellers of imported burners often use a cunning trick: they compare smooth two-stage burners of foreign production with modulated burners of domestic production. Even with a significant difference in prices for “similar” products, they insist on German, Finnish, Italian quality, trying to persuade buyers to purchase these particular burners. However, any specialist working with boiler equipment understands that comparing different types of burners only based on the price component is at least incorrect. Therefore, it is necessary to know the difference between their technical characteristics and capabilities.

The most widespread in boiler houses are two-stage, smoothly two-stage and modulating burners. Two-stage burners, as the name suggests, have two power levels. The first stage provides 40% of the power, and the second - 100%. The transition from the first stage to the second occurs depending on the controlled boiler parameter (direct water temperature or steam pressure), the on/off modes depend on the boiler automation.

Smooth two-stage burners allow a smooth transition from one stage to the second. This is a cross between a two-stage and modulating burner. Modulating burners heat the boiler continuously, increasing or decreasing power as needed. The range of combustion mode changes is from 10 to 100% of the rated power.

Of course, modulating burners are more expensive than stepped models, but they have a number of advantages over them. The mechanism for smooth power control allows you to reduce the cycle of turning on and off boilers to a minimum, which significantly reduces mechanical stress on the walls and components of the boiler, and therefore prolongs its “life”. Fuel savings are at least 5%, and with proper tuning you can achieve 15% or more

. And finally, installing modulating burners does not require replacing expensive boilers if they are functioning properly. When staged burners operate, the boiler experiences significant loads, which eventually destroy the unit.

Against the background of the disadvantages of stepped burners, the advantages of modulating burners are obvious. The only factor forcing managers to choose step models is their lower price. But savings of this kind are deceptive: wouldn’t it be better to spend a large sum at a time on more advanced, economical and environmentally friendly burners, especially since these costs will pay off in the next few years?

Smart managers understand the benefits of using modulating burners, and now all they have to do is select the necessary models. Which manufacturers are best to contact? Even with a superficial study of prices for imported and domestic burners, it is clear that the difference is quite significant. Some models from foreign manufacturers are more than twice as expensive as Russian-made products. And yet, stereotypes that quality goods come only from abroad force people to pay more. However, a more detailed analysis of the market for burner manufacturers shows that we also have high-quality competitive products. For more than 15 years, the Starorussian Instrument-Making Plant has been producing various models of burners that are successfully installed on all types of domestic and imported boilers. Modulating block burners from this manufacturer comply with all environmental standards for fuel combustion, have a wide range of power control (from 10 to 100%), while ensuring maximum efficiency. When looking for reliable, economical burners for boiler rooms, it’s simply impossible not to pay attention to them. Simple installation of equipment already produces tangible results, and if experienced burner adjustment specialists are involved in the process, fuel savings can amount to more than 15%. With the use of modulating burners from Staroruspribor, managers will be able to temporarily forget about another cost item - replacing the boiler. Switching to a “gentle” operating mode allows you to double its service life

. Those who know how expensive such equipment is (prices are calculated in millions of rubles) will appreciate the possibility of replacing these units more rarely.

Selecting a burner correctly is an important step in the construction or renovation of a modernized boiler room. The further operation of the heating equipment depends on how responsibly the customers approach this issue. If, for example, you use modulating burners produced by JSC “, then after two or three heating seasons the costs will be more than recouped. Stable operation, compliance with environmental standards, longer service life of boilers and the ability to fully automate the operation of a thermal power plant indicate significant advantages of using modulating burners in boiler houses. And if the benefit from their operation is obvious, not taking advantage of it is simply unreasonable.

Modulating gas boiler burner

The burner of a gas boiler is in some ways similar to electric motors and internal combustion engines - it does not “like” frequent starts and stops. In this operating mode, its service life is sharply reduced. In high-clocking mode, the heating boiler experiences a significant excess consumption of gas. One of the main tasks of boiler equipment manufacturers is to make the operation of the gas burner smooth, to bring its power closer to replenishing the real heat loss of the room.

Ideally, it would be great if the burner of a gas boiler produced power corresponding to the heat loss of the room, regardless of the outside temperature. This problem has not been completely solved, but partially yes. By modulation. Gas burner modulation is the ability to smoothly reduce power as the heat demand decreases. This is achieved by installing a step-by-step gas valve on the gas heating boiler. The number of valve positions determines the modulation coefficient. All popular boiler models ( BAXI, VAILLANT, NAVIEN and others) have a modulation coefficient of about 1:3-1:7, and the newest boilers, for example BAXI PLATINUM or DUOTEC, up to 1:10.

The frequency of boiler switching on at low heat demand is very high. Gas is consumed uneconomically, constant gas outbreaks negatively affect the boiler elements. A modulating burner works a little differently. As the shutdown temperature approaches, the boiler computer commands the gas valve to reduce the gas supply. The combustion cycle is extended and, accordingly, the clock cycle is reduced. In double-circuit heating boilers, when hot water is opened, the boiler begins to operate at full power.

Gas becomes more expensive every year. Despite the fact that the price of gas heating boilers with a modern modulating burner is slightly higher than conventional ones, we recommend buying just this one. It will quickly pay for itself. Both in terms of service life and gas consumption. And savings, if configured correctly, can reach 15%.

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