Are you going to buy an efficient gas boiler that can provide heat in the most severe frosts? When choosing equipment for your home, there are many factors to consider. Which option is the best? What criteria are the most important? Owners of both private houses and apartments have to think about solving this problem.
Agree, it’s a shame to pay twice and end up with an insufficiently functional boiler that is unable to heat a country house when cold weather sets in. Therefore, before choosing a gas boiler in a store, you will have to weigh the pros and cons. Otherwise, you may end up with a model that is far from suitable.
We will help you decide on the main criteria that radically influence your choice. Useful tips And important nuances are presented in our article. To help the homeowner, photographs and a selection of videos with advice from experienced experts in the field of heat supply are provided.
The absence or constant interruptions of centralized heating and hot water supply force the owners of cottages and city apartments to create...
Their main element is a boiler, which, by burning fuel, heats the coolant for the heating system and water for domestic needs.
Choice in favor gas equipment due to the cost-effectiveness of using gas as a fuel. All other options for burning fuel are more expensive or produce significantly less heat.
Plus, modern heaters of this type do not require constant supervision. I connected the unit to the main pipe or cylinder, and it works uninterruptedly as long as there is something to burn.
The use of natural gas is the optimal solution for heating a private home in terms of fuel costs and operating maintenance costs
However, in order for a gas boiler to function properly and in optimal mode, it is necessary to choose it wisely when purchasing and regularly maintain it after connection.
There are a lot of different functionality and special modules within the models of this equipment. The purchase of a gas heating unit should be approached thoughtfully.
There are many criteria for choosing a gas boiler, but the main ones are:
- Power output by the device.
- Layout solution (number of circuits, type of housing and heat exchanger material).
- Place for installation.
- Availability of automation for safe operation.
All these issues are closely interconnected. Lack of space for a large unit or the desire to install a device with an aesthetic appearance in the kitchen forces you to choose a wall-mounted model with less power than a floor-standing option. And the need to heat hot water for a washbasin and shower forces you to look for a boiler with two circuits.
When choosing a heater, you should remember the need to repair it; if there is no workshop nearby for servicing the selected model, then you should look for another option
Subtleties of choosing a boiler for heating and hot water supply
Modern thermal equipment has a stylish appearance, is filled with all kinds of sensors and can operate in several modes.
Each gas boiler has a burner and a combustion chamber with a heat exchanger inside the body, but there are also models with a circulation pump and other modules
First, the gas in the burner is ignited using an electronic system or a piezoelectric element. Then, as a result of its combustion in the firebox, water is heated through a heat exchanger, which is sent to the circuit of the heating system.
This is how classic single-circuit models work. To prepare hot sanitary water, you need to select or connect a boiler.
Image gallery
Due to the fact that the majority country houses Russian cities and towns are not equipped central heating, the issue of heating a home is quite acute. Gas heating systems quite easily solve the issue of creating autonomous heating. If an electric water heater is installed in the house, then the best solution would be.
Today, the Russian market for climate control equipment is overflowing with heating systems from manufacturers from Germany, Italy, France, Slovenia and China. In terms of its characteristics, domestic equipment is not inferior to the leaders of this segment and is on a par with such brands as Bosch, Vaillant, Baxi, etc. In a huge number of models, manufacturers, brands It’s not surprising even for a specialist to get confused. That is why domestic consumers are increasingly asking the question, which gas single-circuit boiler is better?
Criterias of choice
To choose the right heating boiler model, you should have an idea of the design and operating principle of the device. If you don’t have such knowledge, then contact specialists. If you have any idea how single-circuit gas installations work, then before choosing a specific model, pay attention to following points and design features:
- Manufacturer. For the production of reliable heating gas installations Manufacturers from Germany are in the lead (Bosch, Vaillant). The most functional single-circuit boiler units are offered by manufacturers from South Korea (NAVIEN), Slovenia (Protherm). Italian manufacturers offer devices with the best combination price-quality (Baxi and Ferrolli).
- Ignition type. In modern heating boilers you can find electronic and piezo ignition. The first type involves ignition of the gas mixture in automatic mode. In the second, batteries are used as a power plant. Ignition requires human participation.
- Burner. Single-circuit boilers use single-stage and modulating burners. Single stage always operates at 100% power. Modulated - more modern, they allow you to change the heating power of the coolant in the range from 30 to 100%. In addition, the burner can be atmospheric or turbocharged. Atmospheric ones are more durable and silent. Turbocharged ones have higher efficiency, but also cost significantly more.
- Heat exchanger material. For the heat exchanger, a material with good thermal conductivity and resistance to high temperatures is selected. Copper is a material with better thermal conductivity and a low melting point. A boiler with a copper heat exchanger should be selected for low-power equipment. In addition to copper, stainless steel is used for coils, which has average thermal conductivity and durability. Cast iron heat exchangers are durable, but due to their heavy weight they are used only in floor-standing models.
- The combustion chamber. Modern boilers are equipped with open or closed camera combustion. In an open one, air is taken from the room; in a closed one, air comes from the street through a coaxial chimney.
- Removal of combustion products. Exhaust gases can be removed in modern heating boilers using natural and forced draft. In the first case it is necessary vertical chimney And good ventilation in a room with a boiler. In the second option, combustion products are removed through a coaxial chimney using a built-in fan.
In order to provide assistance
single-circuit wall-mounted boilers are opened by one of the most functional heating devices - Vaillant turboTEC plus VU 122/3-5. This multifunctional unit is designed for heating small rooms, up to 120 m2. The rated power of the boiler is 12 kW, which is adjusted automatically using a modulated burner. The device is equipped with: a closed combustion chamber, a turbine for forced removal of exhaust gases, a built-in multi-stage pump that drives the coolant, a copper heat exchanger, an electronic ignition unit and control of all functions of the installation, information about which is displayed on an informative LCD monitor.
This model is adapted to work in electrical networks with voltage fluctuations, thanks to the built-in stabilizer. The boiler operates without losing power at reduced pressure in the gas main. To work together with a water heater, Vaillant turboTEC is equipped with the necessary connectors. Efficiency - 91%. The average cost in Russian stores is 50 thousand rubles. Disadvantages - high cost.
Baxi Fourtech 1.24F
This popular wall-mounted model is equipped with a closed combustion chamber, turbocharging and a forced smoke exhaust system. Flame modulation in the burner allows you to change thermal power in the range from 9.3 to 24 kW. Maximum thermal load 25.8 kW. The heat exchanger material is copper. The boiler unit is equipped with a water pump to force the coolant to move through the heating system. A 6-liter expansion tank allows you to compensate for the expansion of the coolant due to its heating.
For comfortable use, the unit is equipped with mode indication, automatic ignition, and a built-in thermometer. Safety is ensured by protecting the heat exchanger from overheating, a blast valve, and a gas control system. The unit has an automatic self-diagnosis function. The device efficiency is 92.9%. The average cost is 32 thousand 800 rubles. Disadvantages: some models had problems with the gas valve.
According to our experts and based on price - quality - functionality, the best single-circuit wall-mounted boiler from European manufacturers is Baxi FOURTECH 1.24 F
This model is a single-circuit heating boiler unit with small dimensions from Russian manufacturer"Gazapparat". The maximum power of the device is 18 kW. According to the manufacturer, it is enough to heat an apartment or a small private house with an area of up to 180 m2. The boiler is equipped with an open combustion chamber, and therefore requires a separate chimney and good ventilation in the room where it is installed. The almost silent operation of this mini-boiler room is due to the use of an atmospheric burner. Thanks to the use copper heat exchanger, the efficiency declared by the manufacturer is at around 90%. Gas consumption 2.13 m 3 /h. When switching to liquefied gas, the consumption is 1.59 kg/h.
Comfortable use of this boiler unit is due to the presence of automatic ignition; the temperature and pressure in the system are displayed on the front panel of the unit. Safety is ensured thanks to the gas control system, a safety valve on the water circuit and protection against overheating of the heat exchanger. A feature of this model is low fuel consumption and ergonomic design. It is possible to connect: boiler indirect heating; "warm floor" systems; air turbine; external thermostat. The average price is 20 thousand rubles. Disadvantages: often turns on and off without an external thermostat.
This model is intended for apartment heating in multi-storey buildings and private houses with an area of up to 300 m2. The installation is equipped with a closed fuel chamber and has a capacity of 30 kW. Exhaust gas removal is forced, with the possibility of using a separate and coaxial chimney.
The peculiarity of this device is: continuous combustion modulation; the presence of 1 copper heat exchanger, not subject to low-temperature oxidation; automatic ignition with flame level control. It is possible to connect a water heater and switch to liquefied gas. The main advantage of the boiler unit is accurate temperature maintenance and the ability to use propylene glycol-based coolant. Consumers positively evaluate this heating boiler for its stable operation at low fuel pressure and voltage fluctuations. Efficiency at 100% power – 92.5%. Cost – 36 thousand rubles.
If you decide to support a domestic manufacturer and are wondering which single-circuit wall-mounted heating boiler is better, then, according to our experts and in terms of price-quality-functionality, the best single-circuit wall-mounted boiler from a Russian manufacturer is the NEVA-8230-1 model
As noted above, in the last decade, most of our compatriots prefer living outside the city in own homes and cottages. Unfortunately, they are limited in power, so it is not always advisable to use them for heating large private houses. In this case, underfloor heating systems come to the rescue. Next, a rating of gas floor-standing boilers from Russian and European manufacturers will be presented.
It is a floor heating system with an atmospheric burner and an open fuel chamber. The maximum power of the boiler unit is 44.5 kW. The design of this mini-boiler room includes a built-in 110 liter boiler. to create a domestic hot water system in the house. A special feature of the boiler is the manufacturer’s use of a reliable and durable cast iron heat exchanger. According to the manufacturer, its service life reaches 20 years. Main advantages: low fuel consumption 5.2 m 3 / h; protection class IP 40; Efficiency 92%. Disadvantages: does not work in low pressure gas lines. Cost – 70 thousand rubles.
Designed for heating a small private house or cottage with a total area of up to 120 m2. Equipped with a single-stage atmospheric burner, cast iron heat exchanger, electronic ignition and flame level control sensor. A special feature of this model is the design of the burner with ceramic rods and a fuel flow regulator. The open chamber and lack of pressurization make it impossible to install it in a room not equipped with ventilation and a smoke removal system with natural draft.
The advantages of this heating system: high efficiency - 94%; possibility of connecting an indirect heating boiler; the presence of automatic self-diagnosis. Average cost 7 thousand.e. Disadvantage: VRC 420S regulators are not included in the package.
Lemax Premium 20 – single-circuit energy-independent boiler unit Russian production, power 20 kW. The installation is equipped with a steel body, 2 mm thick, an atmospheric burner and an open fuel chamber. A special feature of this device is the innovative design of the heat exchanger, protected from overheating and coated with a special enamel that prevents corrosion. Advantages of this device: the presence of an air flow regulator, self-diagnosis functions. Efficiency – 90%. Average cost – 21 thousand rubles. Disadvantages: frequent problems with ignition, general shortcomings.
Conclusion: in terms of price-quality-functionality ratio, Vaillant AtmoVit INT 164-564/1-5 is unanimously recognized as the best floor-standing boiler.
The homeowner’s desire to purchase the most economical gas boiler is understandable - the cost of fuel regularly increases, so creating an effective system will significantly reduce the cost of heating the house and preparing water for hot water supply.
Wide selection of boiler brands
You will learn from this article what criteria you should use to evaluate a gas boiler for your home when purchasing equipment for a local heating system.
Efficiency of gas boilers
First of all, you need to understand how the thermal energy of burning fuel is distributed. The energy carrier for a gas boiler is natural or liquefied gas, and the calorific value of any of these types of fuel must be within regulatory requirements– only in this case will the heating unit be able to generate heat in accordance with its ratings.
The calorific value of a gas is a value indicating how much heat is released during the combustion of a unit volume of fuel. The heating unit directs the main part of this energy to heating the coolant in the building system, i.e. for heating the house. The greater the percentage of energy used to solve this problem, the better.
The efficiency of a heat generator (expressed as a percentage) is an indicator of exactly what part of the combustion heat of the energy carrier is used to heat the house. The higher the efficiency, the more efficiently the fuel is used, the less it is required to maintain the heating system operating normally.
Efficiency and economy depend on each other
In turn, the more fully the fuel is used and the lower its consumption, the less money is spent on purchasing energy. Thus, the efficiency of the boiler is directly related to its efficiency.
During the combustion of gas fuel under normal conditions and with a sufficient supply of oxygen, CO 2 (carbon dioxide, also known as carbon dioxide) and H 2 O (water) are released.
Thermal energy obtained as a result of gas combustion is consumed :
- for heating the coolant;
- on the evaporation of water vapor obtained during combustion;
- goes down the chimney along with the flue gases.
The most economical gas boilers differ from the rest in that the absolute maximum of thermal energy is directed to heating the house, while losses on the last two items on the list are minimized.
Combustion chambers and burners
The efficiency of a heat generator running on natural or liquefied gas is usually 90-95%; for premium units this figure can reach 98%.
To a certain extent, the efficiency of the device depends on the characteristics of the gas burner with which the boiler is equipped.
When choosing a heat source, you should pay attention to the type of combustion chamber of the unit - it can be open or closed:
- air enters the open combustion chamber from the room;
- air enters the closed chamber from the street through a coaxial chimney and is pumped by a fan.
Obviously, in the second case, the combustion process takes place with a higher oxygen supply, due to which the fuel burns almost completely, releasing maximum thermal energy. This not only reduces the amount of flue gases, but also increases the efficiency of the boiler.
The burners themselves are of two types - with step and smooth adjustment, thanks to which you can change the power of the unit. The most inexpensive units are equipped with a single-stage or two-stage burner device.
If a gas boiler is equipped with an electronically controlled modulating burner, it can save energy as much as possible. This is due to the fact that the degree of heating of the coolant is smoothly adjusted depending on the real heat needs of the house. This is one of the most important conditions for reducing fuel costs during the heating season.
Attention! It makes sense to install an efficient and reliable gas unit with a modular burner and forced air supply into the firebox as part of a heating system with individual microclimate control in each room. This requires serious investments at the stage of purchasing and installing equipment, but in the future the system pays for itself due to serious savings in energy resources.
A little more about the efficiency of boiler systems
This indicator depends not only on the characteristics of the firebox and burner device, but also on how thermal energy is transferred.
At the first stage, the heat received in the combustion chamber heats the water jacket of the unit. Then the flue gases and the remaining thermal energy pass through a heat exchanger made of steel or cast iron, due to which another part of the thermal energy is spent on heating the water. The remaining heat, along with the flue gases, escapes into the atmosphere through the chimney.
If you measure the temperature of the flue gases at the outlet of the chimney, you can evaluate the efficiency of boiler equipment. In a heater with low efficiency, the temperature of the gases at the outlet pipe reaches (or even exceeds) 200 degrees - this means that a significant part of the thermal energy is irretrievably lost, that is, a decent percentage of the fuel is burned in vain. Gas heating boilers can be considered quite efficient if the temperature of the flue gases at the outlet of the pipe does not exceed 150 degrees. For an economical boiler this figure will be about 100 degrees.
Parameters of exhaust flue gases
The lowest temperature of combustion products is in condensing gas boilers. This is achieved thanks to design features unit, which provides a system for selecting heat obtained during water vaporization. As mentioned above, water is released during the combustion of gas fuel and then evaporates - and part of the resulting thermal energy is spent on this evaporation. Condensing colas differ from classic gas units in that they take this energy back by condensing water vapor.
The condensing model is equipped with a cylindrical burner, which is mounted inside a stainless steel heat exchanger, made in the form of a coil with turns located very close to each other. The coolant circulates through the coil. Water vapor formed during chemical reaction combustion, passes through the coil, since it has no other way, and condenses on its surface. During the condensation process, the steam releases heat to the coil.
When determining which gas boiler is the most economical, you should pay attention to condensing boilers, since the temperature of the combustion products at the outlet of the pipe is the lowest - only 45-70 degrees, while the efficiency is 98%.
What to choose: a condensing or a regular boiler?
As already mentioned, the efficiency and reliability of a condensing boiler is beyond doubt. But it should be taken into account that sellers of such equipment often mislead buyers by declaring that the efficiency of the condensing heat generator is more than 100%. They add to the basic indicator of 98% the “percentage of efficiency” obtained through condensation of water vapor - i.e. thermal energy that the unit takes back, having initially spent on converting water into steam.
The photo shows a condensing boiler
Any literate person who studied physics at school knows that the efficiency of equipment cannot exceed 100%. A condensing unit is capable of minimizing heat loss, but cannot increase the amount of thermal energy obtained by burning gas. Thus, the real efficiency of the condensing heat generator does not exceed 98%.
However, when choosing a heating unit that runs on gas, it is important to consider the following :
- condensing boilers are more economical than conventional boilers, but are significantly more expensive due to their more complex design;
- servicing a traditional gas unit (flushing the heat exchanger, etc.) can be done with your own hands; technically there is nothing complicated about it, but cleaning a condensing boiler requires the involvement of certified specialists.
If you are looking for an economical gas boiler among conventional units, it is important to understand that savings when purchasing equipment in the future may result in increased costs for repairs and maintenance.
Don't forget to estimate installation costs .
For example, a floor-standing gas boiler with an open combustion chamber requires installation in a specially designated room with fire-resistant finishing. In addition, a foundation and a vertical chimney are installed for it.
A model with a closed combustion chamber can be installed in any convenient place and the chimney can be brought out through the wall.
Compact gas boilers are hung on the wall and take up minimal space - this is the most convenient option.
Please note: it makes sense to choose a non-volatile boiler only if it is not possible to provide power to the equipment. Such models have a relatively low cost, but do not provide the opportunity to save fuel.
How to do right choice?
Compare the following indicators :
- Unit efficiency (indicated by the manufacturer in the product passport);
- temperature level of combustion products at the outlet;
- design features of the heat exchanger (the more turns, the more thermal energy the flue gases will have time to release);
- the quality of thermal insulation of the boiler water jacket (it is important that there is no unnecessary heat loss);
- type of combustion chamber;
- type of burner (smooth adjustment is the ability to switch the boiler to the most economical operating mode relative to specific conditions).
An installed heating boiler for a private home must be adjusted correctly; this must be done by specialists. Practice shows that it is not worth saving in the future by inviting experienced professionals to adjust the heating unit - even the slightest deviations from the optimal operating modes of the units lead to the fact that the operation of the boiler becomes less efficient and more fuel is wasted.
The choice you make will not disappoint you if you take into account all the recommendations. But it should be understood that an economical boiler will meet expectations only if the house is well insulated, the optimal heating system option is selected, and fuel with the proper characteristics is used.
No matter how high the performance of the boiler unit, it requires regular preventative cleaning - accumulated contaminants reduce the boiler’s power and provoke excessive fuel consumption.
How to choose an economical gas boiler for heating a private home
How to make the right choice of an economical and efficient boiler for heating a private home. Which gas boilers are practical and reliable to use.
Most of us live in a small house or apartment. Therefore, when installing a gas heating system, the owners want the boiler to occupy as much space as possible less space. Many people place it in small bathrooms or kitchens. This generates interest in small wall-mounted gas boilers that have minimal dimensions. Most of the mounted units have a height of 700 mm, a width of 400 mm and a depth of 250 mm. Let's consider models of gas boilers with the smallest dimensions.
One of the smallest wall-mounted gas boilers is Ferroli DOMIproject Slim F18. Its height is 655 mm, width – 350 mm and depth – 230 mm. Weight is only 27.3 kg.
This dual-circuit model with a closed combustion chamber, it has a power of 18 kW, which is enough to heat an area of up to 150 m². It has a bithermic heat exchanger and is equipped with the “Comfort” function for accelerated preparation of hot water.
The unit is equipped with a digital heating system, a modulating burner that can change power in the range from 6.7 to 18 kW. Thanks to easy access to internal components, this gas boiler easier to carry out servicing.
Main characteristics of Ferroli DOMIproject Slim F18:
- Efficiency=90%;
- DHW productivity at Δt=30 – 8.6 l/min;
Ferroli DOMITECH C24
Another compact model produced by Ferroli is the DOMITECH C24. Its height is 700 mm, width – 400 mm, depth – 260 mm. The boiler weighs 27 kg.
This double-circuit device with an open combustion chamber has a power of 24 kW and is capable of heating a room of up to 200 m². It is equipped with a bithermic heat exchanger, as well as multifunctional control and monitoring systems for operational safety. The type of combustion chamber requires the installation of a classic chimney.
Main characteristics of Ferroli DOMITECH C24:
- Efficiency=90.5%;
- country of origin: Italy.
Bosch Gaz 3000 W ZS 28-2KE
The dimensions of the Bosch Gaz 3000 W ZS 28-2KE are: height – 700 mm, width – 400 mm, depth – 298 mm. Model weight – 30 kg.
This single-circuit unit with an open combustion chamber has a power of 28 kW and is capable of heating an area of up to 250 m². It is equipped with a multifunction display and ionization flame control. The heat exchanger is made of copper. The type of combustion chamber requires the installation of a classic chimney.
Main characteristics of Bosch Gaz 3000 W ZS 28-2KE:
- Efficiency=90%;
- country of origin – Türkiye.
Teplovest KGO-18-S BUDGET
The compact wall-mounted gas boiler Teplovest KGO-18-S BUDGET has a height of 700 mm, a width of 350 mm and a depth of 250 mm. The weight of the unit is record-breakingly small and amounts to 21 kg.
This single-circuit boiler can be equipped with a turbocharged (C) or atmospheric (B) burner. Its power is 20.5 kW, which is enough to heat 150 m². Equipped with a monothermal heat exchanger and can easily replace an old floor-standing boiler in an existing heating system.
Main characteristics of Teplovest KGO-18-S BUDGET:
- Efficiency=90%;
- gas consumption – up to 2.1 m³/hour;
- country of origin – Ukraine.
Fondital Antea CTFS 24
One of the smallest wall-mounted gas boilers is the Fondital Antea CTFS 24. Its height is 700 mm, width – 400 mm, depth – 250 mm. It weighs 26 kg.
This dual-circuit model with a closed combustion chamber has a power of 25.5 kW, which is enough to heat 220 m². The boiler is equipped with two separate heat exchangers: the primary one is made of copper, the second one is made of steel. It has a modern control board and a user-friendly user interface.
Main characteristics of Fondital Antea CTFS 24:
- Efficiency=93%;
- gas consumption – up to 2.7 m³/hour;
- DHW productivity at Δt=30 – 11.1 l/min;
- country of origin: Italy.
Ferroli FER EASYtech C 24
The Ferroli FER EASYtech C 24 model has the following dimensions: height – 700 mm, width – 400 mm, depth – 230 mm. The boiler weight is 27 kg.
This double-circuit unit with an open combustion chamber has a power of 24 kW and is capable of heating a room of up to 200 m². It is equipped with an enlarged bithermal heat exchanger and modern multifunctional control and monitoring systems for safe operation. The type of combustion chamber requires the installation of a classic chimney.
Main characteristics of Ferroli FER EASYtech C 24:
- Efficiency=90.5%;
- DHW productivity at Δt=30 – 11.1 l/min;
- country of origin: Italy.
TERMET MiniMax DYNAMIC 24 kW (turbo)
The compact boiler TERMET MiniMax DYNAMIC 24 kW (turbo) has a height of 700 mm, a width of 360 mm and a depth of 300 mm. Weight is 28 kg.
This double-circuit unit with an open combustion chamber has a power of 24 kW and is capable of heating an area of up to 200 m². The primary heat exchanger is made of copper, the secondary one is made of stainless steel. The boiler is equipped with a modulating burner, as well as the necessary control systems for safe operation. The type of combustion chamber requires the installation of a classic chimney. Main characteristics of TERMET MiniMax DYNAMIC 24 kW (turbo):
- Efficiency=91%;
- DHW productivity at Δt=30 – 11.4 l/min;
- gas consumption – up to 2.7 m³/hour;
- country of origin – Poland.
Design.
To make the boiler heat exchanger, manufacturers use two materials - cast iron and steel. Each material has its own advantages: cast iron has high corrosion resistance and strength, which means longevity, steel means less weight. With a heat exchanger made of steel, the design or recommendations for use play a decisive role.
Condensate has the greatest destructive effect on a steel boiler - unless the manufacturer uses special structural elements to reduce the formation of condensation (some manufacturers limit the minimum supply temperature to at least 60°C). By design, burners are different designs. Now in the West they mainly produce burners with low emissions of harmful substances; most manufacturers adapt their burners for stable operation at low gas pressure in Russia.
The main advantage for low pressure gas is a design with the admixture of secondary air directly into the combustion chambers. This design eliminates by 90% possible burnout of distribution pipes and burner failure. Basic automation. In a modern heating installation manual mode- it is not modern, irrelevant, uneconomical.
During the service life of the boiler - and this is not one or two years - gas can be thrown into the pipe several tens of times more than the cost of the automation. In addition, today we need to think about the fact that gas will become more expensive every year. We need to convince people that by the time they feel the warming with their senses, a lot of cubic meters of gas will be burned. It is important to know that even a room thermostat that costs about 15 euros provides up to 40% fuel savings during the heating season, if the installation is used correctly.
These 15 euros will be “burnt” in a few months. Speaking about the cost of automation, we must admit that sometimes it is comparable to the cost of the boiler; there are cases when for a boiler that costs 800 euros, automation is purchased that costs about 800 euros - but this is only a matter of expediency. In any case, the consumer has the opportunity to choose automation, it all depends on his needs. If the client has an extensive heating system, then the cost of this automation will simply “dissolve” in the cost of all equipment. It’s probably worth talking about savings over many years rather than one-time costs.
Boiler power.
According to statistics from MGSU, which studied this issue, there is a minimum temperature in the region for no more than seven days during the heating season; the rest of the time the boiler is underloaded. Underloading leads to constant switching on and off of the boiler burner (clocking), and the more cycles the boiler has, the lower the efficiency and the greater the wear of the components.
You can combat this by increasing the number of boiler power levels. For most of the heating season, the boiler can (and should) operate at 50% power, i.e. do not go out at the first stage. This simplifies the operation of the boiler, extends the service life of components, and slightly increases efficiency. That is why the ideal reserve of boiler power over heat loss is no more than 10-15%.
Another mistake is summing up the power for heating and hot water. Modern heating devices using capacitive water heaters operate on the principle of priority for DHW: when the boiler is cooled, the entire power of the boiler is switched to heating the boiler, heating stops, so there is no need to add up the power, but it is necessary to add the calculated average daily load for DHW consumption.
Life time.
European manufacturers prescribe a service life of, as a rule, 10 years - as required by Russian legislation. The final decision on how long the boiler can be operated must be made by the operating organization. The service life is determined by the time after which the product may not perform its declared consumer functions and its repair may be impractical.
In this case, it may turn out that it is wiser to buy a new boiler. The boiler may be replaced for other reasons, such as economics. Today, obsolescence comes to the fore; very often boilers are replaced precisely for this reason. Knowing 100% that the equipment will be replaced in 10 years, many manufacturers take the path of saving. It's already global trend, which you can’t argue with.
Condensing boiler technology.
The technology of condensing boilers in our country is just beginning to develop. So far they have not gained popularity due to the low cost of energy, as well as the higher cost of equipment, the low prevalence of low-temperature heating systems that allow for increased boiler efficiency, and the lack of standards for draining condensate from boilers, which is essentially acid, into the sewer network (more precisely, condensate must be neutralized with a special compound before being drained into the sewer).
Condensing boilers for Russia are the technology of the future. Perhaps in the next two or three years it will become more relevant. But it will become truly relevant only when the price of gas becomes equal to the current European price.
The BAXI GROUP company presents on the Russian market a series of floor-standing cast iron gas boilers SLIM with an atmospheric burner. These boilers are produced at the BAXI S.p.A. plant, which is part of the holding. SLIM includes 10 models with an open combustion chamber with a power from 15 to 62 kW, and five models with a closed combustion chamber with a power of 23 and 30 kW. There are both single-circuit and double-circuit boilers - with a built-in stainless steel boiler for hot water with a capacity of 50 and 60 liters.
SLIM boiler models marked “iN” do not have a built-in expansion tank and circulation pump, which provides greater flexibility when choosing equipment for a specific heating system. Floor-standing boilers of the SLIM series, like all BAXI boilers, operate stably at low gas pressure, producing 50% of the thermal power at 5 mbar.
SLIM series boilers have all the necessary controls, safety devices and are made in a modern design. The 62 kW SLIM boiler model comes complete with a gas pressure switch, the purpose of which is to put the boiler into standby mode and automatically turn it on when the gas supply is restored. In case of constant interruptions in gas supply, especially in winter period, this device is very useful and can be purchased for other models of SLIM series boilers. In addition, SLIM boilers have an improved design and a number of fundamental advantages:
- self-diagnosis provides amazing ease of maintenance, allows automatic detection of up to 10 types possible malfunctions in the operation of the heating system;
- continuous flame modulation guarantees smooth and durable operation of the boiler;
- compact size - the width of single-circuit models is only 35 cm;
- it is possible to connect an outdoor temperature sensor;
- the presence of two temperature control ranges (30-85°C and 30-45°C) allows the use of SLIM boilers when operating only in “warm floor” mode;
- sections of the cast iron heat exchanger are manufactured at the French plant of BAXI S.A. - the undisputed leader in France in terms of cast iron quality.
As an accessory, a room thermostat, mechanical or programmable, can be connected to the SLIM boiler, thus ensuring the creation of a comfortable microclimate in the room. And by purchasing a device for a low-temperature circuit, you can ensure that the boiler operates simultaneously on the radiators of the heating system and on heated floors, for example, in the bathroom.
TO single-circuit boilers SLIM can be connected to SLIM UB/UB Inox boilers with a capacity of 80 or 120 l with a tank made of enameled or stainless steel. The temperature in the boiler is controlled either from the boiler panel or from the boiler panel. The boiler is made in the same design as the boiler, and when installed together, it forms an aesthetically complete heating unit.
IN double-circuit boilers SLIM has an antibacterial protection system - “anti-legionella”, which is activated once a week, heating the water in the boiler to a temperature above 60°C. This ensures environmental Safety hot water supply to the consumer. A big plus is the ability to combine SLIM boilers in a cascade to create a mini boiler room.
Using a cascade control unit (RVK 22.4), up to four boilers can be combined, thus providing almost 250 kW of power. The cascade control unit ensures uniform loading of the boilers and a stepwise increase in thermal power. Boilers in this version operate on an independent ring and the supply temperature is controlled by a sensor connected to RVK 22.4.
In the category of gas boilers with atmospheric burner up to 100 kW, DEDIETRICH offers a range of DTG boilers. One of the main advantages of DEDIETRICH boilers is a cast-iron sectional heat exchanger, manufactured in its own foundry on the border of France and Germany (Alsace) for more than 100 years.
DEDIETRICH eutectic cast iron is exceptionally resistant to corrosion, is 30% more ductile than standard gray and can withstand large temperature changes (up to 40°C). DTG series boilers are designed to operate on natural gas or propane (additional burner conversion kit). Atmospheric stainless steel burners provide low emissions of harmful substances.
The burners have special nozzles for stable operation at a gas pressure of 13 mbar. The DTG boiler line includes three series ELITEC DTG 130, DIETRIGAZ DTG S110K and DTG 220. Model DTG S110K from 13 to 48 kW - simple design, minimum electronics and, as a result, an attractive price. Everything is present in the boiler necessary elements security.
To expand the capabilities of automation, there are various modules that allow you to control the operation of the boiler and regulate the room temperature. This year, to replace the DTG S110 K boilers, DEDIETRICH offers a new, more advanced model, DTGX. Boilers in this series retain all the advantages of the DTG S110K model and are distinguished not only by a new design, but also by the presence of a burner with electronic ignition, the ability to operate at a gas pressure of 10-13 mbar and various additional equipment.
The power range of boilers has also increased - from 23 to 54 kW. ELITEC DTG 130 is a new generation of high-performance cast iron boilers with a power from 18 to 48 kW. They perfectly meet current energy saving and protection requirements. environment, combine modern design, ease of installation, start-up and operation.
The boiler heat exchanger has a special design, with an increased heat exchange surface, allowing better heat transfer and ensuring high efficiency. For boilers in this series, there are three types of control panels to choose from. The type of panel is specified when ordering and is built into the boiler body during installation. To satisfy any need for hot water, together with the boiler, a wide selection of DHW water heaters is available.
There are monoblock models (boiler and water heater with a capacity of 110 or 130 liters under one casing) and water heaters installed under or near the boiler (with a capacity of 150 liters). The internal surface of the water heater is covered with vitreous enamel with a high quartz content, ensuring water storage in the best hygienic conditions.
Used for corrosion protection unique system with an active titanium anode, rather than the traditional magnesium anode. Voltage is supplied to the anode from the control panel. The titanium anode does not require any maintenance during its entire service life. DTG 220 boilers with power from 45 to 117 kW, unlike previous models, are equipped with two-stage atmospheric burners with complete pre-mixing.
Two control panels are presented. Panel K—simple automation with two thermostats for manually setting the temperature and controlling the operation of a two-stage burner; installation of expansion modules is provided; Dematic-m Delta panel is an electronic panel with a dialogue system for weather-dependent control of the operation of a two-stage burner.
Dematic-m Delta can control a cascade system (up to 10 boilers in cascade), including a boiler circuit, DHW circuit, mixing circuits and pool circuits. The presented DEDIETRICH dialog modules communicate with the user not using codes, but using clearly written phrases. Wide choose The functions of these control panels provide greater operational capabilities in heating and hot water systems. In addition, they are designed to work together with remote control devices via telephone line and via the Internet.
JUNKERS offers two model range: Supraline and Suprastar. The Supraline power range is represented by six models from 28 to 56 kW. Boilers supplied to Russia are equipped with nozzles designed for a network pressure of 20 mbar; the packaging of each boiler includes a set of nozzles for operating the burner at a gas pressure of 13 mbar. In a number of regions of Russia, the gas pressure in the network is in the range from 17 to 24 mbar; in this case, reconfiguring the boiler is not required.
For normal operation at gas pressures from 10 to 17 mbar, it is necessary to use a set of 13 mbar nozzles. The burner of the Supraline boiler is well adapted to Russian conditions; its design does not allow the flame to “break through” when the pressure drops. The heat exchanger is made of high quality DE DIETRICH cast iron. The maximum heated area for the most powerful model of this series, K56-8 E, is about 550 m2, or, when included in a cascade, up to 1000 m2.
The most common and reliable control system for Supraline: module SVM1 - automation that provides priority control of the boiler in combination with the room temperature controller TRZ 12-2. From April 2006, new E8 controllers manufactured by the German company KROMMSCHROEDER will be supplied, replacing all previously used TA series weather controllers.
The Suprastar power range is represented by nine models from 45 to 117 kW. Like Supraline boilers, they are supplied in a 20 mbar configuration. 13 mbar conversion kits are available. Two stage burner allows stepwise power control, its design complies with European requirements for nitrogen oxide emissions. However, the use of this burner is recommended only in places with relatively stable gas pressure.
In case of strong seasonal fluctuations in gas pressure in the network, it is recommended to install Supraline. As a rule, Suprastar are boilers for houses with several independent heating circuits, heated floors, and a swimming pool. The programmable TAC-M panel allows you to simultaneously control the boiler heating and the main heating circuit. The use of one or two MMX expansion boards makes it possible to control one or two mixer circuits, respectively.
The panel is equipped with a special software control for heating the pool. To expand the capabilities of TAS-M, there is a TAS Plus2 module, which allows you to additionally control two more circuits with mixers. To create cascades of Suprastar boilers, models of “slave” FM boilers of different capacities are offered. The connection is made using a BUS connecting cable.
PROTHERM
PROTHERM series of floor-standing boilers is represented by five models: “Bear”, “Grizzly”, “Bison”, “Lion” and the Protherm TLO boiler, independent of electricity. PROTHERM floor-standing boilers are extremely simple functionally, and therefore extremely reliable. They are durable and resistant to both temperature changes and loads, as well as to the human factor - violation of operating rules and negligence in handling.
Cast iron boilers of the “Bear” series include 13 models, varying in power and functional equipment. The power range of “Bear” series boilers is 20-60 kW. The heat exchanger is made of high-quality gray cast iron and has a high heat transfer coefficient. Gas fittings HONEYWELL, developed specifically for this series of boilers, and stainless steel burners provide a stable combustion mode with possible gas pressure drops in the network and a high degree of environmental friendliness, both for the environment and for maintaining a comfortable indoor microclimate.
The power control of the “Bear” boiler is two-stage. At the lower power stage (No. II), the boiler operates stably at a natural gas pressure of 0.8 mbar and above. Maximum operating pressure OV - 4 bar. The maximum temperature of the heating agent is 90°C. It is possible to connect a boiler for heating DHW with a volume of up to 200 liters. In this case, DHW heating will have priority over the heating function.
At their rated power, Medved boilers provide hot water flow from 16 to 20 l/min. The “Bear” series is equipped with all the automatic safety equipment necessary for this class of boilers. A step-by-step power control mode, an equithermal control system, protection against condensation, a control system for flue gas removal—everything that distinguishes a high-class boiler is available, but at a reasonable price.
Model “Bear” (20-40) KLZ is a boiler with a built-in 90-liter tank for heating hot water with a magnesium anode. Smooth power control, built-in pumps for the DHW and DHW circuits, two expansion tank and electronic control with auto-diagnostic function. Boiler of the highest class and degree of reliability for cottages and apartment buildings. The Grizzly boiler continues the Bear series, but is superior to its counterpart in power.
There are five models available from 65 to 150 kW rated heating output. Depending on the regulators used in the control system, Grizzly can operate in a cascade of up to 16 boilers simultaneously. For floor-standing boilers, PROTHERM uses equithermal regulators with the ability to work together in a cascade from SIEMENS - Albatros RVA 43.222, RVA 63.242 and RVA 63.280.
These regulators allow you to plan the weekly operating cycle of the boiler installation with the creation of time ranges and comfortable temperature conditions for each range separately. "Bear", the most famous PROTHERM floor-standing boiler, became the basis for the creation of a non-electric TLO boiler with a nominal heating output of 20 to 50 kW.
The TLO boiler is ignited using a special thermoelement, which generates the electrical voltage necessary for operation and control. The gas fittings for this model were developed by SIT NOVA, the burner by POLIDORO. The technical equipment and functionality of the TLO models otherwise coincides with the parameters of the boilers of the “Bear” KLO (PLO) series.
In 2005, the TLO boiler was purchased new design. This is due to its unification on a par with the KLO and PLO models. This eliminates possible problems with the supply of spare parts separately for a particular model. Another floor-standing unit from PROTHERM is “Lev” with smooth power control in the range from 6 to 26 kW. This is a series of condensing boilers with a built-in boiler for heating hot water.
The peculiarity of the boiler is its high degree of efficiency, achieved through the maximum possible use of the heat of the flue gases and the water vapor contained in them. The maximum flue gas outlet temperature is 87°C. The boiler is equipped with all functions for maintaining a comfortable mode, the necessary protections and a continuous self-diagnosis system. The Lev boiler has a digital display.
VIESSMANN
In the sector of floor-standing gas boilers up to 100 kW, VIESSMANN offers a wide range of heating equipment, which is traditionally distinguished by the highest quality, efficiency and environmental friendliness. In the sector of the updated line of boilers we can name Vitola, Vitogas, Vitoplex. The new boilers are distinguished by a more sophisticated modular layout strategy, in particular with regard to control units.
Thanks to the modular approach, the company managed, firstly, to significantly reduce the cost of equipment, and secondly, to make the work of its partners easier. VIESSMANN pays great attention to the development and support of a large network of regional service centers, and a unified approach to new control systems simplifies equipment repair - a service company now only needs to have a small set of electronic boards.
The body of the boiler remained practically the same, the water content and weight changed slightly - the boiler became lighter, more convenient to transport and the load on the ceilings of roof boiler rooms was reduced. For the new modification of Vitorond boilers, a new controller has appeared, the design of the generator itself has changed slightly, and thanks to the principle of unification, the cost of this boiler has decreased.
The line of household floor-standing boilers of the Vitogas series has become more compact, and the power range has expanded slightly - from 29 to 60 kW (previously from 35 kW). And, of course, new controllers have appeared - the Vitotronic 100/200 series type KC-3, KC-4, KW-4, KW-5. The design has changed slightly: the front wall has a more strict casing design (there is no decor on the boiler casing).
New boilers of the Vitogas series can be distinguished from the old series by markings: previously the modification was called Vitogas 050GS0, now the letter “A” has appeared. The burner in the floor-standing boilers of the Vitogas series is atmospheric, partially pre-mixed, now special rods are installed in the upper part - the Renox system, thanks to which emissions of harmful substances have become even lower than before.
The Renox system was patented by VIESSMANN back in 1986. The new Vitola series boilers also changed their design, this primarily concerns the burner device, the burner casing; new controllers KC-4, KW-4, KW-5 appeared, more universal and compact. All VIESSMANN heat generators have become lighter and the water content has changed.
VIESSMANN boilers are designed with a significant margin. As for the modification of the Vitoplex 100 PV1 series boiler, the company’s approach has changed dramatically. Previously, the company offered a line of Vitoplex boilers in two versions: there were boilers that belonged to the group 100 SX/PX and 300TX (300 is “high-tech”, the most protected from operating errors, 100 SX/PX is the most affordable model, with a fairly wide power range - from 80 to 1750 kW); but there was no middle option. Now the company produces Vitoplex series boilers in three variations: models 100 PV1, 200 SX2 and 300 TX - any customer request can be satisfied.
The Vitoplex 100 PV1 is available from 110 to 620 kW. The Vitoplex 200 SX2 is available from 90 to 560 kW. This is a classic three-pass boiler with a high average annual efficiency of up to 94%, and this allows you to save up to 25% of fuel (compared to boilers of outdated designs)!
The model has low emissions of harmful substances due to the reduced thermal intensity of the boiler furnace, and this is a big advantage when installing equipment within the city. This boiler also does not require a boiler circuit pump and does not require a mixing pump, because The boiler has no restrictions on the return temperature.
This was made possible thanks to the special design and the special Therm-Control starting circuit, patented by VIESSMANN in 1991 (formerly TRA/TSA circuit). ThermControl is a platinum resistance thermometer built into the body of the boiler block to record the temperature of the hot boiler water mixture and cold water return line.
The decisive advantage is that the cold return water temperature is recorded inside the heat generator and not just at the supply pipe, as in standard boilers, where, during unsteady operating mode, condensation may occur due to cooling of convective heating surfaces. Accordingly, using this boiler model, the customer saves money on equipment such as pumps, electricity and maintenance.
This model also allows operation in both constant and variable flow temperature modes. VIESSMANN offers new lines of boilers of the 100 series and 200 series, the previous 100 line has been discontinued. The new models of the Vitoplex 100 series are a compact solution, two-pass, because both cottages and industrial enterprises There are different ones - one needs a constant temperature, the other needs it to change in the system depending on the outside air temperature.
In fact, the control possibilities are almost limitless - VIESSMANN controllers installed in a boiler room can control a maximum of 98 heating circuits with mixers and manage up to 33 DHW systems. In addition, the adaptation concerns the DHW system. During the summer/transition period, the burners in VIESSMANN boilers may switch off before the cylinder temperature is reached desired value, and “reheating” to the required value is carried out due to the thermal inertia of the boiler itself!
Of course, the purpose of all these features is to save fuel! And it's not full list unique opportunities. VIESSMANN offers a system remote control and the impact of Vitodata—for control via the Internet. To connect to this service, you only need to buy equipment, and the company provides access to the Vitodata system free of charge.
The Vitoplex 100 series model assumes operation at a constant temperature, is equipped with a modern controller, which is also assembled according to a modular principle, the model is quite attractive in price and very compact. Available in power ratings from 110 to 620 kW. VIESSMANN boilers can be combined in a cascade of up to four boilers, even with 11 kW boilers you can “do this trick.”
The warranty period is 20 years, the standard warranty is two years. In presenting the VIESSMANN supply program in this range, we cannot fail to talk about the floor-standing condensing boiler Vitodens 333. The compact Vitodens 333 boiler combines the advantages of the Vitodens 300 condensing boiler and a high-quality 86-liter storage tank drinking water.
Its dimensions correspond standard sizes kitchens and allow the boiler to be integrated into the living area. With a height of no more than 140 cm, the Vitodens 333 is ideal for installation in roof slopes or recesses. The MatriX-compact IR burner guarantees environmentally friendly operation with a minimum amount of harmful emissions.
In combination with a high-quality steel heat exchanger and a drinking water storage tank, the boiler guarantees the preparation of hot water at a predetermined, uniform temperature, even for large quantities of water. Automatic loading control ensures that condensation heat is recovered during the entire loading process. All electrical connections are easily accessible and the hydraulic components are pre-assembled into a single unit.
This means that the Vitodens 333 can be installed in the shortest possible time. The new Vitotronic controller has been moved to the top of the module, which not only makes operation easier, but also means certain advantages for service and maintenance.
VAILLANT
Floor-standing boilers from VAILLANT with a power from 16 to 157 kW belong to the domestic sector. The company has two lines of floor-standing gas boilers: atmoVIT - from 16 to 56 kW in two versions: single-stage atmoVIT and two-stage atmoVIT exclusive; and two-stage atmoCRAFT - from 65 to 157 kW. All of them are certified and designed to work in networks with gas pressure from 13 to 25 mbar.
Boiler heat exchangers are made of gray cast iron. Heat exchangers for atmoCRAFT series boilers can be ordered either assembled or as a set of separate sections for assembling the boiler directly in the boiler room. Burners with ceramic rods, which are necessary to reduce emissions of nitrogen oxides. Exist different methods control the operation of boilers at several stages (powers).
VAILLANT uses stage control using a throttle and changing the excess air ratio. In the same burner, with the same number of pipes, different amounts of gas are burned, controlled by the flow of combustion air. The VAILLANT design has shown its effectiveness. All models of VAILLANT floor-standing boilers are already equipped as standard with a microprocessor control unit with an LCD display and preparation for controlling DHW heating, which allows significant savings when installing various additional devices.
For several years now, VAILLANT, like other leading European manufacturers, has been implementing the principles of modularity and expandability of its equipment. With the introduction of the latest group of atmoCRAFT floor-standing boilers, the company has unified automation and unified control accessories. Additional automation for controlling the heating system and VAILLANT boilers is represented by a wide range model range- from simple room thermostats(for example, VRT 40 costing 30 euros) to cascade weather-compensated.
VAILLANT's most advanced control system is weather-dependent automation, which automatically monitors weather changes and adjusts the operation of the heating system accordingly. For this purpose, you can use two VAILLANT regulators built into boilers - VRC 410 and VRC 420 S, or you can take these same regulators into the room, then it will be possible to combine weather-dependent and room control.
The most complex controller is the universal cascade VRC 630. This is an advanced device with the ability to expand with additional modules. The retail price of the basic configuration is 880 euros. The service life of the boilers is 10 years. The warranty period is two years from the date of commissioning, but not more than two and a half years from the date of retail sale.
