The best double-circuit gas boilers. Ratings of gas boiler manufacturers

On modern market heating equipment there are many devices differing in design features, price and manufacturer. Therefore, many are interested in what you need to pay attention to when choosing gas boilers, rating of the best in its price category and class.

When compiling a rating of the best gas boilers for the home, they first take into account the popularity of a particular brand, the popularity and demand of the product. How reliable is it and is it in demand? different countries can be judged from sales and service center reports, as well as from reviews from numerous customers.

Each of the above companies deserves to take first place and lead the rating of the best wall-mounted or floor-mounted gas boilers, single- and double-circuit, that is, in their class. All of them have a solid reputation, have been on the market for a long time, and their products are well known to consumers.

Noting the best Russian-made gas boilers, the rating is headed by the following brands: Irbis, NevaLux (OJSC Gazapparat), ZhMZ, Conord (ZAO Rostovgazaparat).

The best wall-mounted gas boilers

As is clear from the name of the type of boiler, they are structurally designed for installation on a wall. In most cases, they are produced with relatively low power - up to 35 kW. This is explained by the fact that they are equipped with a copper heat exchanger, which is not intended for high temperatures.

Useful information for those who are interested in wall-mounted gas boilers, the ranking of the best is headed by Bosch products. Special attention deserves the Bosch GAZ 600 WBN model. The advantages include:

— compact dimensions;

— relatively high efficiency — up to 93%;

— equipped with a turbocharged combustion chamber;

- efficiency;

— availability modern system electronic protection;

This model is the optimal choice for heating a small private house or apartment. Among single-circuit boilers, the best wall-mounted gas heating boilers, along with Bosch, are topped by models from another well-known manufacturer - Baxi, in particular ECO FOUR 1.14, LUNA 3 Comfort 1.310 Fi, BAXI LUNA DUO-tec MP 1.35.

Single-circuit boilers

Single-circuit boilers are used only for heating premises for various purposes, this means the basic configuration. But in principle they can also be used to serve hot water, if you additionally equip it with a boiler.

It is important to take into account design differences. For example, a double-circuit boiler heats running water, and in order to automatically turn on the hot water system, it is necessary to provide a sufficient level of pressure to the water flow at the inlet. Therefore, it will not be possible to use hot water sparingly.

Installation of single-circuit boilers is optimal for large areas in which water intake devices (showers, taps, etc.) are located at a decent distance from the boiler. This is explained by the fact that, according to technical conditions, an additional pump cannot be connected to a heating system with a double-circuit boiler.

The rating of the best gas heating boilers among “single-circuit” ones is headed by: BAXI SLIM 1.490 IN, PROTHERM MEDVED 50 KLZ.

The latter is equipped with a built-in boiler with a capacity of 110 liters, so there is no need to buy additional components. The advantages of MEDVED 50 KLZ include the following factors: efficiency, high efficiency - up to 92%, which is a very high indicator for this type of equipment, as well as a high degree of electrical protection - class IP40.

Rating of the best double-circuit gas boilers

Double-circuit gas boilers are universal and are excellent for heating homes and providing hot water supply (hot water supply). Most often they are produced in a floor-standing version, but if desired, you can also find a wall-mounted double-circuit boiler. Distinctive feature double-circuit boilers is the presence of an additional heat exchanger.

— Danko 10X;

— Vaillant atmoVit INT 164-564/1-5;

— BAXI SLIM 2.230.

This gas boiler is called one of the most reliable that are presented on the modern heating equipment market.

Their advantages are: high efficiency, reliability, the presence of an automatic protection system, efficiency, and long service life.

Considering the best wall-mounted double-circuit gas heating boilers, the rating is headed by the following models: Baxi (Baxi) LUNA 3 310 Fi, Baxi (Baxi) MAIN FOUR 24,

Baxi (Baxi) ECO FOUR 24, “Jaguar” and “Lynx” (manufacturer Protherm).

Floor-standing gas heating boilers for country cottages

Floor-standing gas boilers are more in demand, as they can be used with virtually no restrictions, which is explained by the wide range of heating equipment in this class. They are characterized by much large sizes and power, compared to wall-mounted ones. The latter are recommended for installation in cases where the area of ​​the room is very limited.

Floor-standing gas boilers can be called the optimal solution for heating premises for various purposes with an area of ​​100 - 600 m2. Today there are many models of such equipment with various configurations on sale. But the main classification of floor-standing boilers

carried out by power, by the type of coolant used, by the number of circuits, by type of burner, by energy dependence, by the material from which the heat exchanger is made, by type of draft.

According to the latter indicator, gas boilers are divided into atmospheric and turbocharged. Atmospheric ones are characterized by high reliability, simplicity and long service life, almost complete noiselessness and low cost.

Boilers equipped with a turbocharged burner are much more expensive, but have higher efficiency rates.

1) BUDERUS Logano G125-32 WS.

Important. This model is characterized by its versatility, as it can operate not only on gas, but also on diesel fuel and high efficiency, which reaches 96%.

Other advantages of Logano G125-32 WS:

— combined (electronic-mechanical) type of control panel;

— the ability to select configurations, including modules used to expand functionality;

— minimum noise level during operation.

The latter property is ensured due to the fact that the amount of air supplied to the system is optimized. Plus a very affordable price for heating equipment in a private home.

2) VAILLANT ATMOVIT INT 164-564/1-5.

This German-made gas boiler is the most suitable option for heating installation country house relatively small area, no more than 120 m2. Advantages:

— equipped electronic system self-diagnosis;

— good indicator Efficiency - 94%;

— compactness;

— modern design;

- relatively light weight - 82 kg.

The only drawback, according to buyers, is that VRC 420S regulators must be purchased separately, since they are not included in the standard package.

3) ALPINE AIR FL-8 - the optimal choice for heating small spaces (workshops, country houses, garages, etc.), the area of ​​which does not exceed 50 m2.

The model is characterized by a fairly high efficiency - 94%, reliability, efficiency, compact dimensions (750X280X310 mm), durability and operational safety. The average gas consumption is less than 1.0 m3/h. An important advantage is the energy independence of the equipment. The downside is the spontaneous shutdown of the device when the gas pressure at the inlet drops below 13 mbar.

4) KUSATERM 10-20. It occupies a leading position in the rating among gas heating boilers for baths.

It is important to consider that the operating principle of gas boilers intended for installation in bathhouses differs quite significantly from conventional heating equipment

The advantages of this model include:

— quick heating of the stones, which is ensured by the presence of a fan;

— reliability, safety and durability;

— the boiler body practically does not heat up, which is due to the presence of thermal insulation made of FoamGlass;

— quick selection of the desired mode using the electronic control panel.

Despite the relatively high cost, the owners of Kusaterm 10-20 note that this boiler allows you to quickly prepare the bathhouse for procedures, and the process itself is pleasant and comfortable.

In general, when choosing gas boiler heating, it is necessary to take into account many factors, in particular: efficiency, reliability, safety of use, adjustability, rated power of the equipment, efficiency, cost and design features, and of course who the manufacturer is.

Considering all of the above, we can draw the following conclusions. Firstly, when deciding which gas boiler to choose for a private home, it is not enough to rely only on the rating of a particular model and manufacturer, but take into account its functionality and requirements. In particular, for houses equipped with hot water heaters or boilers, choosing a single-circuit boiler can be considered a rational option. In other cases, when in addition to heating in the house, you also need to provide hot water supply, you need to choose a double-circuit boiler of suitable power, which can be found out from the performance characteristics. Here are examples of suitable options for private houses of various sizes.

Once the type of heating boiler has been selected, you need to correctly select a device that will fully meet the requirements and have the appropriate characteristics, such as efficiency, power, pressure, operating temperatures, and area of ​​heated premises.

Due to the fact that the range of products offered to consumers heating devices appeared large number With new, modified models of domestic and foreign production, having different characteristics and price levels, nowadays it is possible to replace the old boiler with a more economical, compact and aesthetic one without any problems. Many owners decide to “kill two birds with one stone” with such a purchase, that is, at the same time solve the issue of autonomous hot water supply. And this is not difficult now - they are offered a wide selection of double-circuit boilers.

However, such high market saturation often contributes to the “reverse effect”, that is, it makes choosing the optimal model a very difficult task. We will try to help with this - we will provide a list of devices that are consistently included in the constantly changing rating of double-circuit, wall-mounted and floor-mounted gas boilers. True, a reservation can be made: the authors deliberately did not award certain places to the listed boilers - simply so as not to interfere with the subjective factor in this issue. The defining criterion was positive reviews consumers who have already tried this technique in practice. In a word, the boiler models indicated in the publication can be purchased with close to 100% confidence in receiving a device of high build quality and with the expectation of its long-term operation.

Of course, when choosing any heating boiler, you need to pay attention to other criteria that affect quality and durability.

Basic criteria for choosing a heating device

Unit type by location.

Double-circuit boilers are divided into floor-mounted and wall-mounted.

• Floor-standing double-circuit gas boilers, as a rule, are designed for higher thermal output than wall-mounted models, so they are most often installed in houses with a large area. However, for such heating devices with a power of 30 kW or more, a separate room from the living area is required. Therefore, before choosing such a model, it is necessary to study not only the technical characteristics and operating rules, but also the standards for boiler room equipment.

On sale you can find models of floor-standing gas boilers that do not require power to operate - it is only important that there is a gas supply of natural or liquefied gas. Such variants of units are especially convenient for heating in houses located in rural areas, where power outages are not uncommon. The design of non-volatile boilers is quite simple, but very reliable; such units are more durable than boilers with complex automation.

The efficiency of modern floor-standing models is 90 percent or higher.

• Wall d Double-circuit gas heating appliances, as a rule, are compact in size, so they are convenient to install in small houses or even in a city apartment.

Since such a unit does not take up much space, it is usually placed on the kitchen wall, where all the communications necessary to connect it are located. For the operation of almost all models of wall-mounted heating devices, an uninterrupted power supply is required. The circulation pump, the automation unit, and, in models with a closed combustion chamber, the fans for air injection and exhaust of combustion products require power.

Naturally, installing a gas boiler in the living area of ​​the house increases the requirements for the organization more efficient system ventilation.

Unlike floor-standing boilers, in which steel or cast iron heat exchangers, wall-mounted appliances, in order to reduce their weight, are often equipped with copper heat exchange elements.

The power of wall-mounted units usually varies from 9 to 30 kW.

Power of double-circuit boilers

In order for a heating and water heating device to be truly effective in operation, it is necessary to correctly calculate its power for a specific house or apartment.

Very often on the Internet you can come across a sign like this:

To be honest, such information, instead of a clear idea, can, on the contrary, raise a lot of questions in the consumer. Agree that the difference in price between 9 kW and 20 kW models will be quite significant, and the spread of options according to such a “coordinate system” is impressive.

In addition, this approach does not take into account the characteristics of the regional climate, the building itself and its individual rooms, the degree of glazing (that is, the number and size of windows) and many other important circumstances. Therefore, it seems more reasonable to carry out more thorough calculations, in which the calculation calculator located below can help.

The basic principle is that calculations are carried out for each heated room separately, and then the results are summed up. This, by the way, gives the owners another “preference” - having such calculation results in hand (and it is best to display them on a plate - for each room separately) it will be much easier and correctly to arrange heat exchange devices - radiators or convectors - in the rooms.

Calculator for calculating the required thermal power for space heating

The calculation is carried out for each room separately.
Enter the requested values ​​sequentially or mark the desired options in the proposed lists.
Click “Calculate thermal power”

ROOM PARAMETERS

Room area, m²

100 W per sq. m

Number of external walls:

External walls face:

The position of the outer wall relative to the winter “wind rose”

Level negative temperatures air in the region during the coldest week of the year

What is the degree of insulation of external walls?

Average degree of insulation External walls have full insulation

Indoor ceiling height

Up to 2.7 m 2.8 ÷ 3.0 m 3.1 ÷ 3.5 m 3.6 ÷ 4.0 m more than 4.1 m

What's underneath?

Cold floor on the ground or above an unheated room Insulated floor on the ground or above an unheated room A heated room is located below

What's on top?

Cold attic or unheated and uninsulated room Insulated attic or other room Heated room

Type installed windows

Regular wooden frames with double glazing Windows with single-chamber (2 panes) double-glazed windows Windows with double-glazed windows (3 panes) or with argon filling

Number of windows in the room

Window height, m

Window width, m

Doors facing the street or balcony:

It should be noted that the obtained value already includes the required operational power reserve; there is no need to exceed it.

Experts in this regard even advise purchasing a boiler with indicators slightly lower than the calculated power. The fact is that the boiler will show its maximum “abilities” for a very limited time, literally one or two weeks, during the peak of winter cold. The rest of the time, the equipment operates only at partial use of its potential, which, by the way, negatively affects both efficiency and service life. This is especially true for devices assembled according to old scheme– with a single-stage burner. Each stop of the boiler, when the required temperature in the heating circuit is reached, is accompanied by cooling of the combustion product removal system - and this means the appearance of condensation on the walls of the chimneys, and the need for absolutely unnecessary energy costs to warm up these channels after the next boiler start-up.

To some extent, this problem is less pronounced in boilers with stepwise power control - either all burners or only a certain part of them are involved in the operation. Well, the most economical in this regard will be the operation of a modern unit equipped with a burner flame modulation system. With high-quality settings, it works almost continuously, but very economically consuming gas and creating the necessary comfortable temperature in the rooms. True, the primary costs for such equipment, especially if the power is increased, are always significantly higher.

Boiler power indicators for operation in DHW mode

All of the above would be completely true if the calculation was carried out for a regular boiler. But in our case we are talking about double-circuit, and this makes its own significant adjustments.

The point is that everything double-circuit boilers designed for priority hot water supply. This suggests that when using hot water, the operation of the device switches exclusively to heating it. But here the power indicators are completely different, since to ensure a rapid increase in the required temperature in the flow circuit requires very significant energy consumption.

Each of the plumbing fixtures installed in residential buildings(apartments) is characterized by its hot water consumption. Approximate values ​​are shown in the table below.

Draw point type	Average hot water consumption
	- liters per second	- liters per minute
Kitchen sink	0.14	8.4
Wash basin	0.07	4.2
Shower	0.12	7.2
Bath	0.2	12
Bidet	0.07	4.2
Household dishwasher	0.15	9

In the passport data of flow-through heaters, this indicator is usually indicated - the nominal flow rate of water heated by the device.

However, there is still a dependence on what the inlet water temperature is (and in winter it can be only 5÷8 ºС) and what is required at the inlet. To take water hygiene procedures, 40÷45 ºС is usually sufficient, for kitchen sink– up to 50÷55 ºС.

Knowing the “hardware filling” of your home plumbing system, it is easy to estimate how much hot water flow may be required. And using the calculator below, you can reduce this to the thermal power of the heating device.

Calculator for calculating thermal power for instantaneous water heating

Enter the requested values ​​and click “CALCULATE THE POWER FOR RUNNING WATER HEATING”

Type of appliances connected to the DHW (indicate only those that are likely to be used at the same time)

WATER TEMPERATURE INDICATORS

Required outlet water temperature, degrees

Supply water temperature, degrees

Pay attention to the following nuance. There is probably no point in carrying out a summary calculation for all points of water consumption - the probability of their simultaneous operation is small, especially if appropriate “discipline” is established with this issue among family members. Otherwise, you get generally “cosmic” power values, which will significantly exceed the need for this parameter for heating needs. So it would be more correct to assess the situation by taking into account only the most “energy-intensive” hot water consumption device.

When choosing a specific double-circuit boiler, the priority in terms of power will again be for DHW. You will have to look for a “golden mean” in order to try not to overinflate the total power, but at the same time, to meet the need for hot water and use it economically. And in this regard, again, models with the ability to modulate the burner flame will have an advantage.

Another acceptable solution is to use not the flow-through, but the storage principle of hot water supply: installing a boiler indirect heating. The excess power of the boiler (and, as we have seen, it is almost always present) should be more than enough to maintain a certain volume of constantly heated water. By the way, some modern boiler models already have a built-in boiler of one capacity or another.

Features of the water heating circuit

Another criterion that must be taken into account when choosing a double-circuit boiler is the method of heating and supplying water. It has already been mentioned that hot water supply has priority over heating, but water heating can take place in one, so-called bithermal heat exchanger, or the circuit uses two - the main one for heating, and the secondary one for heating domestic water.

The bithermal heat exchanger has separate channels for the circulation of coolant and heated water, according to the principle (pipe in pipe). Its main advantage is that devices of this type are more compact. Their cost is also somewhat lower, since in any case the price of one, even complex, heat exchanger is less than two separate ones.

There are many disadvantages to such a scheme, and the main one is that such heat exchangers are extremely susceptible to scale overgrowth and rapid failure. Moreover, in such a situation, both the heating system and the hot water supply become inoperable.

A scheme with two heat exchangers is considered more advanced.

In such devices, when the hot water tap is turned on, the automation triggers the ceiling sensor and switches the coolant circulation from the heating circuit to a “small circle” - through a secondary heat exchanger, in which it transfers its thermal potential to the flow of cold water.

It is clear that the boiler itself is larger in size, but the absence of the disadvantages inherent in bithermal models compensates for this, and such models are considered more modern and reliable.

The most advanced boilers are those equipped with a primary condensing heat exchanger. The fact is that in conventional devices, heated air vapors, which are always present in the air, simply fly out into the chimney, carrying away a certain energy potential. Condensing boilers have a special cooling (condensation) scheme with the extraction of additional thermal energy. The efficiency of such devices, and therefore the overall efficiency in gas consumption, is much higher.

Open (atmospheric) and closed combustion chambers

Based on the principle of supplying air necessary for gas combustion and removing combustion products, boilers are divided into two groups.

• Appliances with an open combustion chamber receive the required volume of air directly from the room, and the gases are exhausted into a vertical chimney of the required height, due to natural draft.

The advantages of such a scheme include the absence of additional devices (fans, special pneumatic sensors, etc.), noiselessness, simplified general scheme, and therefore its less vulnerability, lower price of boilers.

Disadvantages are the need to install a properly designed chimney (sometimes this is simply impossible), special requirements for equipment supply ventilation air. The construction of a chimney itself is a costly task, and relatively low price the boiler is still not justified.

• In devices with a closed combustion chamber, both the supply of the required volume of air and the removal of gaseous combustion products are forced, using a built-in fan. This allows you to avoid installing a bulky “classic” chimney - you can get by with installing a small coaxial one, through separate channels of which counter flows are organized.

The advantages are obvious - such a boiler can be installed almost anywhere by venting the coaxial chimney through external wall. This fully justifies the higher cost of such devices. There is no need to provide additional ventilation to the room.

However, there are many disadvantages. The temperature difference in the channels of a coaxial chimney always results in the formation of a considerable amount of condensate, which in extreme cold can even freeze, reducing or even completely blocking the normal removal of gases. The saturation of such devices with additional automation means, whatever one may say, a decrease in overall reliability. Another disadvantage is complete dependence on the stability of the electricity supply. In addition, some users may be annoyed by the noise of running fans.

Adjusting the heating boiler power

The type of heating power adjustment is also one of the factors that you need to pay attention to when choosing a heating device. This has already been briefly mentioned above.

Boilers differ in this parameter as follows:

• Single-stage burners have one operating mode, that is, they cannot be adjusted. In a word, they either work or they don’t. The burner starts and stops automatically when the minimum and maximum heating temperatures of the coolant are reached.
• Two-stage models have two operating modes, that is, they can operate at full power or at half of it, i.e. by 50÷60%. Moreover, the automation itself adjusts the required power level as needed. This type of device is quite economical, as gas consumption is reduced, and temperature regime, automatically maintained, is more accurate.

• The modular version of burners is the most modern, economical, but at the same time the most expensive type of device. Adjustment of gas flow, combustion intensity, flame height is carried out using automation, that is, the power that is needed at a particular moment in time is selected, and it can vary from 10 to 100%. The advantages of this design of the device are that it provides significant fuel savings and reduces the number of on and off cycles, which extends the life of the unit. Ideally, the boiler should not go out at all - burning at optimal intensity is always maintained.

Burner ignition type

A double-circuit boiler can have different types of ignition - this criterion is also worth paying attention to when purchasing a device:

• Electronic ignition does not require constant monitoring, since it works automatically - this option is convenient if the boiler is installed in a separate room. However, this option is energy-dependent, since it runs on electricity and if it turns off, the device does not function. True, there is an automatic restart system when the power supply is restored.
• In boilers with piezo ignition the situation is different. The user manually lights the igniter by pressing a button, which subsequently burns continuously. When you turn on the water in the hot water supply or when the automatic heating system is triggered, gas begins to flow from the burner, which ignites from the igniter. The pilot flame, by the way, is a kind of indicator of the normal state of the entire boiler. So, for example, if there is a lack of thrust, it fades, and thereby cuts off the general gas supply. This indicates that the unit may need cleaning.

However, there are also devices similar in principle to models with piezo ignition, but where the igniter torch is ignited “the old fashioned way” - from a match.

Heat exchanger material

The efficiency and service life of the boiler directly depend on the material from which the heat exchanger is made. Therefore, when choosing a double-circuit heating device, this factor is also worth paying attention to.

• The cast iron heat exchanger has a high resource of thermal strength and corrosion resistance, so it can last 30–50 years. However, due to their heavy weight, material heat exchangers are installed only in floor-standing boiler models. Such a heat exchanger is afraid of sudden temperature changes and mechanical shocks.
• A steel heat exchanger weighs much less than a cast iron one, and devices with it are cheaper. But steel, unlike cast iron, is already susceptible to corrosion; the service life of an element made from this material is much shorter. True, many modern grades of stainless steel make heat exchangers practically invulnerable to the above negative impacts coolant.
• The copper heat exchanger is lighter than all others, so it is ideal for installation in wall options boilers A heat exchanger made of this material does not corrode, has excellent thermal conductivity, and a fairly long service life.

Fuel consumption

Another important criterion for choosing a double-circuit boiler can be fuel consumption. This parameter depends on several factors that have already been mentioned above - the power of the unit, its efficiency, type of adjustment, automatic equipment and others.

Knowing the nameplate gas consumption of the boiler allows you to predict in advance the approximate costs of operating the heating system. Typically, this parameter is also indicated in the accompanying technical documentation of the product.

Trustworthy models of double-circuit gas boilers

A large number of domestic and foreign companies present their products on the heating equipment market, so the range allows you to choose an option that is ideal for heating a particular home. To navigate the models of these products and their manufacturers, it is worth considering the most popular of them.

Russian manufacturers

Products from domestic manufacturers are no less, and sometimes even more popular than foreign ones, since such boilers are always developed taking into account Russian climatic conditions, the quality of network gas and possible voltage drops in the power supply system.

It can be noted that Russian products sometimes differ from those of foreign companies in their less aesthetic appearance, but in terms of reliability they are not only not inferior, but sometimes even superior to their foreign counterparts.

Boiler AKGV "Zhukovsky"

This heating device has been produced for more than 30 years by the machine-building plant in Zhukovsky, Moscow region. The plant produces single-circuit and double-circuit units. Today, the company’s product range includes more than 15 models of boilers of different power, which are designed for installation in non-volatile autonomous systems heating and water supply with natural and forced circulation.

The devices of this manufacturer use heat-resistant steel heat exchangers with turbulators, slot atmospheric burners from the German companies “HONEYWELL” or “SIT”, which significantly increased the environmental parameters of the boilers and increased their efficiency to 88%. The boiler's DHW circuit is made of copper. All products of this manufacturer are certified by the State Standard of Russia and have also passed sanitary and epidemiological examination.

The main technical characteristics of the Zhukovsky AKGV boilers of the Comfort line are shown in the table:

Name of parameters	Double-circuit models and their technical characteristics
	AKGV-11.6	AKGV-17.4	AKGV-23.2	AKGV-29
Burner power, kW	11,6	17,4	23,2	29
Heated area, m²	up to 100	up to 140	up to 200	up to 250
Gas pressure, nom / min / max, Pa	1274 / 635 / 1764
Natural gas consumption, m³/h	1,3	1,87	2,55	3,18
Efficiency for heating / hot water supply, %, not less	86/75	86/75	88/75	88/75
Water consumption in DHW at t=35 °C, l/min	3,34	5,4	7,1	8,9
Outer diameter of gas outlet, mm	117	135	140	140
Overall dimensions, HxWxD, mm	850×310×412	1050×420×480	1050×420×480	1050×420×480
Net/gross weight of the device, kg	30 / 35	49 / 57	52 / 60	55 / 63

Double-circuit boilers "Conord"

LLC "Plant CONORD" is the largest manufacturer of equipment for heating buildings in Russia. Already in 1979, the company became a recognized leader in the production of these products and still does not lose its position, remaining at the peak of popularity among Russian consumers.

The range of this manufacturer includes such products as instantaneous water heaters, pellet boilers and burners, AOGV and, of course, gas, solid fuel and universal boilers heating.

Over the years of the company's work, the CONORD and DON boilers have been improved many times, and today this equipment has European quality, and at the same time ideally adapted to Russian operating conditions. The plant produces single-circuit and double-circuit heating devices with a unique design of heat exchangers, which copes well with any operating conditions, which is guaranteed to provide a residential building with heat.

The plant's products have received international certification ISO 9001-2011. They have repeatedly been awarded the title of Laureate of the All-Russian competition “100 Best Products of Russia” and have earned other prestigious awards.

Double-circuit gas boilers “CONORD,” equipped with automatic “SIT”, have the following characteristics:

Boiler name	Power, kW	For a house up to m²	Efficiency, % not less		Average gas consumption, m³/hour	Weight, kg	Dimensions, mm
KSts-GV-8S	8	80	90	3.3	1.15	34	428×304×925
KSts-GV-10S	10	100	90	3.3	1.2	37.8	428×304×925
KSts-GV-12S	12	120	90	3.3	1.35	39.5	414×304×925
KSts-GV-16S	16	160	90	5	0.95	53.7	494×368×925
KSts-GV-20S	20	200	90	6	1.2	54.7	494×368×925
KSts-GV-25S	25	250	90	6.7	1.4	67.7	581×454×925
KSts-GV-30S	30	300	90	8.3	1.8	67.7	581×454/×925

A similar model of gas boilers "CONORD", but with thermo-hydraulic automation in its design:

Boiler name	Power, kW	For a house up to m²	Efficiency, % not less	Water consumption in DHW (Δt=35ºС), l/min	Average gas consumption, m³/hour	Weight, kg	Dimensions, mm
KSts-GV-8S	8	80	90	3.3	1.15	34	428×304×925
KSts-GV-10S	10	100	90	3.3	1.2	37.8	428×304×925
KSts-GV-12S	12	120	90	3.3	1.35	39.5	414×304×925
KSts-GV-16S	16	160	90	5	0.95	53.7	494×368×925
KSts-GV-20S	20	200	90	6	1.2	54.7	494×368×925
KSts-GV-25S	25	250	90	6.7	1.4	67.7	581×454×925
KSts-GV-30S	30	300	90	8.3	1.8	67.7	581×454/×925

In the tables, the letter marking means: “K” - boiler; “C” – heat exchanger made of heat-resistant steel; “H” – heat exchanger made of cast iron; “G” - gas boiler; “B” – presence of a hot water circuit; “ts” – the heat exchanger body and fireboxes have a cyclonic shape.

JSC "Borinskoe"

OJSC Borinskoye has been producing gas boilers since 1992. At first, the company produced devices with low power. Subsequently, ISHMA devices were developed, which became popular throughout Russia, as they are excellent for various regional conditions. The products of this manufacturer have been awarded many diplomas, including a nomination for “100 best goods of Russia”.

Today, this manufacturer produces 30 models of heating devices with a capacity of 7÷100 kW - these are single-circuit and double-circuit, as well as floor-mounted and wall-mounted boilers, which are convenient for installation in autonomous systems of private houses and apartments. Users who have already tested the operation of these devices note their qualities such as ease of use and cost-effectiveness. All heating units from this manufacturer are equipped with automatic systems outages in emergency situations, for example, too high temperature coolant, gas shutdown or insufficient draft.

In addition, the heating units are energy-independent, which is very important for their use in areas with an unreliable power grid.

The main line of heating appliances from this manufacturer can safely be called boilers of the ISHMA series, in a wide range of capacities

All boilers of Borinskoye OJSC use a piezoelectric element for ignition, steel heat exchangers for heating systems, and copper heat exchangers in some models for hot water supply. Boiler efficiency reaches 87%. These are general characteristics for all dual-circuit devices, and individual ones are presented in the table.

Boiler name	Power, kW	For a house up to m²	Water consumption in DHW (Δt=45ºС), l/min	Installation type	Weight, kg	Dimensions, mm
"ISHMA 12.5 BSK"	12.5	120	3.5	wall	47	700×530×225
"AKGV 11.6 (M) Eurosit"	11.6	110	2.5	floor	55	978×403×463
"AKGV 17.4 (M) Eurosit"	17.4	140	4	floor	60	1050×403×463
"AKGV 17.4 Eurosit", copper DHW circuit	17.4	140	4	floor	60	994×403×463
"AKGV 23.2 (M) Eurosit"	23.2	190	4	floor	65	1050×403×463
"AKGV 23.2 Eurosit" copper DHW circuit	23.2	200	4	floor	65	995×403×463
"AKGV 29 Minisit (M)" copper DHW circuit	29	Up to 250	6	floor	70	1050×403×463

OJSC"NEVA LUX"

One of the most famous Russian manufacturers of wall-mounted gas boilers is the company OJSC Neva Lux. The Neva company, founded in 1996, was already engaged in the manufacture of gas heating boilers and economy-class water heaters. In 2004, the company was renamed Neva Lux. Today gas water heaters and Neva Lux heating boilers are produced at one of the large Russian enterprises - the Armavir Gas Equipment Plant.

Double-circuit wall-mounted boilers from this manufacturer have the following characteristics:

Name of parameters	Double-circuit models and their technical characteristics of NEVA LUX boilers
	8230	8624	7224	7218
Power, kW	30	24	24	18
Number of heat exchangers	2	2	1 (bithermic)	1 (bithermic)
Nominal gas flow, m³/h	3.43	2,65	2.62	2.62
Efficiency at 100% / 30% power, %, not less	92,5 / 90,7	92 / 90	92,5 / 90,7	92,5 / 90,7
Heated area, m2	up to 300	up to 240	Up to 240	Up to 180
	14	14	14	14
Overall dimensions, mm	720×410×326	720×410×326	720×410×326	720×410×326
Net weight, kg,	35	28	34	34

TO general characteristics These wall-mounted double-circuit boilers include the following factors:

— operating temperature range 30÷85 degrees;

- in models with two heat exchangers, an economical one is installed for the heating circuit copper heat exchanger, which is adapted to chemical washes;

- devices can operate on natural and liquefied gas;

— the combustion chamber is equipped with water cooling;

— warranty period for products is two years.

Foreign manufacturers

Now let's look at the products of several well-known foreign companies. These are mainly European companies, but you can also find products from Asian countries. Thus, the most popular products are from Italian manufacturers Ferroli, Ariston and Beretta, and from German companies Bosch, Vaillant and Viessmann.

These manufacturers have an impeccable reputation, but it is still better to choose models manufactured specifically for Russian operating conditions. Therefore, when purchasing foreign products, it is best to ask the seller whether the unit is adapted for installation in Russian heating systems.

Vaillant Company (Germany)

The Vaillant company was founded in 1874, and during this long period of work it has managed to gain popularity and trust of consumers and experts. It should be noted that 27% of heating appliances manufactured in Europe come from this company.

The company produces several model lines wall-mounted and floor-standing boilers of various capacities. The devices are compact in size and always have an aesthetic appearance.

Vaillant double-circuit boilers, intended for heating and hot water supply, have two heat exchangers, one of which, the primary one, is made of copper, the secondary one is made of stainless steel.

The boilers are designed to operate on natural gas, but if necessary, they can be converted for liquefied gas; for their reconstruction, a set of jets will be required. The devices are volatile, as they require a control board to be connected to the power supply. It is also recommended to install a voltage stabilizer; it will help protect the device from network surges.

Voltage stabilizer - guarantee of uninterrupted efficient work boiler equipment

Very many modern boilers equipped with innovative monitoring and control systems that require a stable power supply. , how to decide on its basic parameters - all this is in a separate publication on our portal.

These boilers can be equipped with an open combustion chamber and are called atmospheric, since combustion products are removed by creating natural draft through a vertical chimney (atmoTEC line). Other models, with similar parameters, have a closed combustion chamber and a forced air supply system to ensure combustion (turboTECK).

Parameter table wall models gas heating double-circuit boilers "Vaillant":

Boiler name	Power (max.), kW	For a house up to m²	Efficiency, % not less	Water consumption in DHW (Δt=25ºС), l/min	Average gas consumption, m³/hour	Weight, kg	Dimensions, mm
"turboTEC pro VUW 242-5-3"	24	up to 240	91	11	2.9	46	800×440×346
"turboTEC plus VUW 202/5-5"	20	200	91	9.6	2.4	35	800×440×346
"turboTEC plus VUW 242/5-5"	24	240	91	11	2.9	36	800×440×346
"turboTEC plus VUW 282/5-5"	28	280	91	11	3.5	37	800×440×338
"turboTEC plus VUW 322/5-5"	32	320	91	14	3.7	38	800×440×338
"turboTEC plus VUW 362/5-5"	36	360	91	17.2	4.4	38	800×440×338
"atmoTEC Pro VUW 240/5-3 H"	24	240	93	11	2.9	34	800×440×338
"atmoTEC Plus VUW 200/5-5"	20	200	91	9.6	2.4	39	800×440×346
"atmoTEC Plus VUW 240/5-5"	24	280	91	11	2.9	41	800×440×346

Bosch Company (Germany)

The Bosch company was founded in 1913. Over a period of more than a hundred years of operation, its products, with completely different directions, have earned the widest popularity and are practically the quality standard for many newly formed companies around the world.

One of the main directions of this manufacturer are heating devices. Several lines of models have been developed and produced, differing in design parameters, which allows you to choose the appropriate option for a specific region and operating conditions. All products presented on Russian market, adapted to the technical parameters of the supply and fuel quality.

The table shows the characteristics of wall-mounted models of Bosch double-circuit heating boilers:

Boiler name	Power (max.), kW	For a house up to m²	Efficiency, % not less	Average gas consumption, m³/hour	Weight, kg	Dimensions, mm
WBN 6000-35 C RN S5700	35	350	92	3.9	39	700×400×299
WBN 6000-12 C RN S5700	12	120	93.2	2.1	32	700×400×299
WBN 6000-18 C RN S5700	18	180	93.2	2.1	32	700×400×299
WBN 6000-18 N RN S5700	18	180	93.2	2.1	32	700×400×299
WBN 6000-24 C RN S5700,	24	240	93.2	2.8	34	700×400×299
WBN 6000-35 H RN S5700	35	350	93	3.9	39	700×400×300
ZWC 24-3 MFK	24	240	93	2.8	42.9	825×400×370
ZSC 24-3 MFK	24	240	93	2.8	43	825×400×370
ZSC 24-3 MFA	24	240	93	2.8	42.9	825×400×370
ZWC 24-3 MFA	24	240	93	2.8	43	825×400×370
ZWC 28-3 MFK	28.1	275	90	3.2	45	825×400×370
ZWC 28-3 MFA	31.1	280	93	3.2	43	825×440×370
ZSC 35-3 MFA	36.5	330	93	2.9	47	825×480×370
ZWC 35-3 MFA	33.4	330	93	4	47	825×480×370
ZWA 24-2 A	24	240	92	2.72	39.9	750×400×355
ZWA 24-2 K	22	220	92	2.52	36	750×400×355

Gas wall-mounted double-circuit boilers of the Bosch GAZ 6000 WBN and Bosch GAZ 7000 ZWC line are characterized by the following features:

— All devices are adapted to operate at low gas supply pressure;

— It is equipped with separate heat exchangers, which is a clear advantage for installation in regions with hard water. The primary one is made of copper, the secondary one is made of stainless steel;

— The boilers have a convenient, intuitive control panel with an LCD display.

— equipped with a fan for forced air intake and removal of combustion products;

— All WBN 6000 models are equipped with a closed combustion chamber. Boilers of the ZSC line come in two versions - MFK means open chamber, MFA means closed.

— Bosch ZWA models - with an open or closed combustion chamber (K ​​or A, respectively), have one bithermal heat exchanger of a unique configuration, which eliminates the active formation of scale in the hot water supply channels. They have a built-in three-stage circulation pump that is protected against blocking; built-in expansion tank with automatic air vent; The self-diagnosis system is well thought out.

All Bosch heating devices are energy-dependent and, if necessary, can be converted to use liquefied gas as fuel using a set of nozzles.

Kiturami Company (South Korea)

The South Korean company “My Kiturami” does not have a “rich history” behind it, but even during this short period of its work it has become a well-deserved leader in the production and sales of equipment for heating systems. The popularity of this manufacturer is explained by the fact that its products are highly reliable, minimal costs during its operation.

Such successes were achieved thanks to a well-thought-out personnel policy, attracting leading specialists, and conducting our own scientific and experimental research in the field of heat engineering and electronics. In Russia, the products of this manufacturer are in high demand.

There are several model ranges of “Kiturami” double-circuit heating boilers, perfectly adapted for use in Russian conditions:

Table of wall-mounted models of “Kiturami” double-circuit heating units:

Boiler name	Power (max.), kW	For a house up to m²	Water consumption in DHW (Δt=35ºС), l/min	Efficiency, % not less	Weight, kg	Dimensions, mm
"World PLUS-13R"	15	150	6.6	92.5	33	721×430×250
"World PLUS-16R"	16	160	10	91.6	34	721×465×278
"World PLUS-20R"	20	200	11	92.5	34	721×465×278
"World PLUS-25R"	29.1	180	16	93.2	39	788×507×310
"World PLUS-30R"	34.9	350	20	92	37	788×507×310
"Twin Alpha-13"	15.1	130	5.4	91.2	26	730×430×210
"Twin Alpha-16"	18.6	160	10.7	91.4	26	730×430×210
"Twin Alpha-20"	23.3	240	13	91.8	26	730×430×210
"Twin Alpha-25"	29	280	10.4	91.6	29	730×486×210
"Twin Alpha-30"	34.8	320	20	92.3	29	730×486×210
"Twin Alpha-13 Coaxial NEW (15.1 kW)"	15.1	121	5	91.4	26	730×430×210
"Twin Alpha-16 Coaxial NEW (18.6 kW)"	18.6	146	6	93.1	26	730×430×210
"Twin Alpha-20 Coaxial NEW (23.3 kW)"	23.3	186	8	92.3	28	730×430×210
"Twin Alpha-25 Coaxial NEW (29 kW)"	29	233	10	91.8	29	730×486×210
"Twin Alpha-30 Coaxial NEW (34.8 kW)"	34.8	279	12	92.3	29	730×486×210

Each model range of heating units is different design features or materials for the manufacture of some elements:

- “Kiturami World PLUS” - this boiler is equipped with two separate heat exchangers made of copper. The device is equipped with a fan for forced removal of combustion products and air intake, as well as separate chimneys.

- “Kiturami Twin Alpha” and “Kiturami Twin Alpha Coaxial NEW” - these heating devices are equipped with two separate heat exchangers made of stainless steel.

All Kiturami models are volatile; it is also recommended to connect them through a voltage stabilizer to protect the boiler automation from voltage surges.

Company "ARISTON" (Italy)

The ARISTON company was founded in the 30s of the last century, and its founders immediately chose a name that fully justified itself. The fact is that “ARISTON” translated from Greek means “best”, and indeed, this brand is one of the most popular in the Russian and, of course, the European market.

Gas appliances from this company are designed to operate on natural gas, but when changing the burner they can also be used for liquefied gas. The double-circuit wall-mounted boiler is very popular due to its compact size and cost-effectiveness of the unit.

Table of characteristics of wall-mounted models of double-circuit heating units "ARISTON":

Boiler name	Power (max.), kW	For a house up to m²	Efficiency, % not less	Water consumption in DHW (Δt=35ºС), l/min	Average gas consumption, m³/hour	Weight, kg	Dimensions, mm
"Ariston Genus Premium Evo 24"	24.4	240	108.1	14.2	2.33	35	770×400×315
"Ariston Genus Premium Evo 30"	31.1	300	108.1	15.8	2.96	35	770×400×385
"Ariston Genus Premium Evo 35"	34.5	350	108	18.6	2.41	36	770×400×385
"Ariston Genus Premium Evo System 24"	24.4	240	108	14.2	2.33	35	770×400×315
"Ariston Genus Premium Evo System 30"	33.3	300	108	15.8	2.8	35	770×400×385
"Ariston Genus Premium Evo System 35"	34.5	350	108	18.6	3.28	36	770×400×385
"Ariston Clas Premium Evo 24"	24.4	240	107.7	14.5	2.33	32	770×400×315
"Ariston Clas Premium Evo 30"	31.1	300	107.7	16.8	2.96	35	770×400×385

All the models listed in the table have a closed combustion chamber, that is, these boilers are called turbocharged. The boilers are equipped with fans that remove combustion products while simultaneously supplying air to the combustion chamber. For devices with this design, coaxial chimneys are usually used.

The heating unit has two separate heat exchangers - a primary one made of copper, a secondary one made of stainless steel. Devices in the EVO line use additional heat extraction through condensation of water vapor. Please note that the manufacturer claims efficiency above 100%!

All models of these series are volatile and require additional connection via a stabilizer. This is necessary for the correct operation of the precision weather-sensitive automation installed on all models.

It should be noted that this table shows a small part of the dual-circuit models produced by ARISTON. In addition to them, in Russian specialized stores or on the Internet you can find many other options with different characteristics. Therefore, choosing the right model in all respects will not be difficult.

Another well-known foreign brand that is in high demand among Russian consumers is the products of the South Korean company NAVIEN. We present to our readers a short video about one of the models.

Video: brief presentation of the double-circuit boiler “Navien Deluxe Coaxial”

So, when planning to purchase high-quality heating equipment, you should first study the technical characteristics of models that can be classified as rated. Products from an unknown manufacturer, information about which is not publicly available, or it is very scarce and contradictory, should be “swept aside” immediately. If you plan to buy a foreign-made model, then you need to opt for a boiler whose monitoring and control system is maximally adapted to local conditions. Only in this case can you count on the durability of the installed equipment. will be true.

At the end of the publication, it is appropriate to place a video in which a specialist will share tips on choosing a heating boiler.

Video: useful recommendations for those choosing a gas heating boiler

The advantages of equipping a country house with a gas boiler are obvious: “blue fuel” is cheaper than electricity, and its stable supply instills confidence in the availability of uninterrupted heat. Therefore, today in our article you will see a rating of wall-mounted double-circuit gas boilers in terms of reliability because... This type of boiler is the most popular and in demand.

Double-circuit gas boilers solve two main problems:

• home heating;
• supplying consumers with hot water.

When choosing one or another unit, you need to rely on the structural elements:

1. Combustion chamber. An open combustion chamber requires a separate chimney and a ventilation system that provides a guaranteed air exchange rate of 3-4 times per hour. In the absence of these devices, you should focus on a gas boiler with a closed combustion chamber.
2. Burner type. In units produced by modern industry, three types of burners are used:

• atmospheric, the principle of operation of which is based on the pressure in the system;
• modulated, capable of converting the heating coefficient;
• two-stage, switchable to 40% energy load at maximum heating temperature of the coolant.

Diagram of a double-circuit gas boiler

Wall-mounted double-circuit gas equipment has compact dimensions, low weight and relatively low cost. It fits perfectly into small space, can be easily equipped with a chimney, and is also suitable for heating spaces up to 300 sq.m.

The line of these boilers of German origin is equipped with combustion chambers of closed and open types:

1. Buderus Logamax U044 is equipped with an open firebox and draws air from environment. B vertically installed chimney combustion products are ejected, and the fan provides additional pumping of smoke.
2. Buderus Logamax U042 24K has a closed camera. One of the advantages of the unit is the intake of air from the street or from the environment. Using a coaxial chimney (pipe within a pipe) will remove combustion products outside and allow fresh air to enter the room. This model does not have a water storage tank: you can get a hot stream using the flow method.

The combination of durability, frost resistance, adaptation to power surges, and increased noise insulation (≤36 dBA) place the unit at one of the highest levels of reliability and quality.

Buderus Logamax U042 24K, having a modulating burner and a double-walled heat exchanger, has a sufficient power amplitude - from 8 to 24 kilowatts, which allows the equipment to operate at a minimum pressure in the system, at which other units operate with errors.

Advantages:

• Silent;
• Economical;
• Safe;
• Easy controls.

Flaws:

• Installation of an uninterruptible power supply is required, otherwise when working on the network, for example, welding, errors may occur or the board may burn out;
• The built-in circulation pump is below the declared power.

Bosch Gaz 6000 W WBN 6000-24 C

The German company Bosch expanded its activities by launching the production of gas boilers in Portugal, Turkey and Russia (Engels). Wall-mounted varieties of units quickly gained popularity due to the popularity of the brand. The low price offer also played a significant role in consumer demand.

Bosch Gaz 6000 W WBN 6000-24 C has a closed combustion chamber (turbocharged boiler) and some advantages over other lines of well-known brands:

• equipped with a gas saving system (winter-summer);
• frost protection;
• equipped with a gas control system;
• providing protection against pump blocking;
• presence of weather-dependent automation.

Possessing a standard set of functional features and equipment, this model is quite competitive in the Russian consumer market.

Gas boiler from Bosch - acceptable budget option for the user who prefers a well-known brand at a low cost.

Advantages:

• Heats up quickly and well;
• Easy installation;
• Economical;
• Smooth ignition, many settings.

Flaws:

• Sometimes it produces errors; de-energizing the boiler for a few minutes helps;
• Pump vibration;
• The tubes in the differential relay accumulate condensate (error C4) and need to be purged.

Baxi MAIN 5 24 F

Baxi gas equipment from the Italian manufacturer has established itself as a full-fledged competitor on the Russian market. The MAIN 5 24 F model from Baxi represents the fifth generation of wall-mounted water heating units. The compact dimensions of the boiler allow you to find a convenient place for it in minimal space.

The main advantages of the presented model are:

• enhanced adaptation of equipment to the characteristics of conditions deviating from the standards;
• electronic protection against scale;
• ionization fire control;
• thermal power range – 6-24 kilowatts;
• frost protection;
• presence of a water pressure sensor.

Equipment safety monitoring and control devices are related indicators of the reliability of units.

Advantages:

• Convenient boiler control;
• Good automation.

Flaws:

• Noisy and not very economical because it starts often;
• The tube often falls off the pressure sensor.

Protherm Cheetah

European quality, durability and ease of control are combined in the Protherm Gepard gas boiler from Czech manufacturers. Possessing technical perfection, ease of operation, reasonable price and maintenance, this model is confidently gaining momentum among the Russian population.

The qualitative advantages of the Protherm Gepard wall-mounted boiler are characterized by:

• calculated efficiency – 92%;
• the ability to select a comfortable heating mode - “winter” - “summer” - “vacation”;
• equipped with a heat-controlled bypass (bypass channel);
• the presence of a three-way valve (control unit for maintaining the set temperature);
• the presence of an automatic air valve (device for bleeding air);
• frost protection;
• control of flame and draft in the chimney.

With the right approach to installing a boiler, the equipment can last for decades.

Advantages:

• Easy installation;
• Quiet;
• Reliable and easy to maintain.

Flaws:

• No service documentation;
• Dependent heating circuits. This means that if a person washes in the bathroom, then no heating is used for heating.

Navien DELUXE

The Navien DELUXE turbocharged gas water heating equipment manufactured in Korea has proven itself to have decent functionality, ease of use, and, most importantly, quality characteristics:

• the ability to heat water not only with flame, but also with combustion products (smoke);
• possibility of using coaxial and separate chimneys;
• presence of a programmable microprocessor;
• supply of frost protection;
• complete with auto diagnostics.

Important! As the smoke cools, condensation forms. When its volume in the boiler becomes high, the moisture is thrown out through a special outlet. A sewer pipe must be connected to it.

With the help remote control, included with the device, you can program a comfortable room temperature.

Advantages:

• Low price;
• Good remote control.

Flaws:

• Not a strong pressure of hot water;
• A bit noisy.

Viessmann Vitopend

When faced with the choice of purchasing one or another gas equipment, the consumer relies on financial opportunity, the technical equipment of the unit, its quality and functionality, as well as cost savings and environmental characteristics. German manufacturers of the Viessmann company managed to combine the listed parameters in Vitopend water heaters. Characteristics wall-mounted boilers of this brand are:

• combustion products contain a minimal amount of harmful components that are easily processed by plants;
• reduced gas consumption at high efficiency(for turbocharged models);
• The Vitopend line is characterized by two types of units:

1. With a flow method for producing hot water.
2. With a storage tank (up to 50 l), which allows you to save on energy and remain with hot water in the event of an unauthorized gas shutdown.

• quiet operation;
• possibility of using natural and liquefied gas;
• equipped with a work safety controller.

In the absence of central gas supply and power outages, you can choose a manually controlled boiler. This will allow you to organize a heating system using mechanical thermostat, independent of fluctuations in energy resources.

Advantages:

• Compact;
• Heats water perfectly;

Flaws:

• Not very reliable.

Oasis BM-16

A budget wall-mounted gas boiler made in China, Oasis BM-16, is designed to heat a room with an area of ​​no more than 160 sq.m and provide hot water supply. It can operate on natural, liquefied and bottled gas. The guaranteed service life of two years is not the only declared advantage of the device:

• low cost;
• self-diagnosis (errors are displayed);
• frost protection;
• presence of an expansion tank with a volume of 6 liters;
• the ability to regulate the temperature of the coolant;
• built-in condensate drain;
• programmable timers.

The Oasis BM-16 boiler, like its European competitors, has the ability to install one of the types of smoke removal to choose from: coaxial or separate.

Advantages:

• Well made;
• Support for heated floors;
• Autodiagnostics.

Flaws:

• Not very powerful.

MORA-TOP Meteor

The efficiency of the Czech gas units of the Mora Tor company has once again proven its high competence and competitiveness by launching model range Meteor boilers. Among many, they stand out:

• affordable price offer;
• protection against power surges;
• modulation of flame combustion (gas saving);
• possibility of changeover to natural, liquefied or bottled gas;
• equipped with a temperature sensor;
• protection against gas pressure drop.

The improved series of MORA-TOP Meteor Plus boilers is equipped with automatic controls that can be freely adjusted to the consumer’s wishes. Automated control makes the equipment more reliable.

Haier Falco L1P20-F21(T)

Multi-level protection ensuring Chinese gas equipment Haier Falco L1P20-F21(T) uninterrupted operation, long service life and high quality Efficiency allows the device to compete in the market of water heater manufacturers. Features worth paying attention to:

• flame break protection;
• equipped with temperature sensors;
• three-level frost protection;
• automatic heating time control;
• pressure protection;
• control over lack of traction.

Important! It is worth paying attention to the possibility of quality service unit in that geographical area, where the gas boiler goes to work.

Wall-mounted or floor-mounted, single-circuit or double-circuit, with one or two heat exchangers, automatic or manually controlled – selection criteria gas technology enough. The main thing is that savings do not stand in the way of safety.

Advantages:

• Heat exchanger made of high quality copper;
• Modulated gas burner made of stainless steel;
• Brass hydraulic block;
• Good security system.

Manufacturers of gas equipment offer two types of heating devices - wall-mounted and floor-mounted. The most widespread use today is for wall-mounted gas boilers, because they have a number of undeniable advantages, among which we can highlight: payment for actually consumed energy, independence from the use of hot water, the ability to independently determine the temperature regime in the heating network, as well as the beginning and end of the heating season.

In this article:

Types of mounted boilers

Single-circuit - used exclusively for space heating.

These are the simplest boilers in terms of design characteristics.

Double-circuit – for water heating and heating.

The structure of a double-circuit gas boiler is more complex design made of copper tubes (through which the coolant flows) and metal (steel) plates, which increase the heat capacity of the boiler.

This design of the heat exchanger is called primary. The main task of the system is to transfer energy to the burner, which contains the coolant.

Double-circuit boiler design

The secondary heat exchanger (plate) of a gas boiler is designed to heat water in the water supply system. Heating occurs due to the transfer of thermal energy from the coolant to the water in the water supply system. Detailed description.

Condensing - have the most complex device in terms of design parameters.

The boilers have a system with a closed combustion chamber, in which a fan with variable speed creates an optimal gas-air environment. Combustion products are not completely released into the atmosphere - they partially condense the steam in the smoke mixture and reuse it.

Such a system is very economical, which significantly reduces gas costs, which can be reduced by.

Additional benefits

In addition to the above, mounted boilers heating have a number of significant additional advantages:

Universal design and dimensions of the boiler

• Compact dimensions– this significantly reduces the space used in the room. As a result, wall-mounted boilers can be used everywhere (in houses, apartments in multi-storey buildings, in the country).
• Power ranges from 10 kW to 40 kW. Heating 10 square meters of area requires 1 kilowatt of power. Accordingly, one boiler can heat up to 400 square meters.
• Affordable price– wall-mounted boilers are 1.5-2.5 times cheaper than floor-mounted ones.
• Silence– they can be installed in any room (silence is achieved due to the existing hydraulic system).
• Economical– low gas consumption.

Brief description

For gas boilers, there are two types of ignition - electronic and piezo ignition.

The most optimal and economical is electronic ignition. It runs automatically as needed. If the gas supply is stopped, the boiler goes out, and when the gas supply is resumed, it restores its operation.

Piece ignition starts the device by pressing a button. Accordingly, about automatic operation You can forget the boiler (you will have to turn it on yourself).

Most models are equipped various devices security.

These include the following devices and technical solutions:

• flame presence sensor – when the flame dies out, the gas supply stops;
• device for blocking the operation of the boiler during a power outage;
• sensor for blocking the boiler operation in case of temperature rises above the norm;
• a device that blocks the operation of the boiler if the gas volume or pressure is below normal.

Boilers can also be divided according to the type of exhaust mixture emission:

1. boilers with natural draft (open combustion chamber);
2. forced draft boilers (closed combustion chamber).

Coaxial chimney with horizontal outlet

On devices with natural draft, a collector must be installed to remove combustion products.

The principle of a coaxial chimney lies in the fact that the air inside the room is not “eaten up” by the boiler. And thanks to the fan built into the boiler, waste products are ejected and fresh air from the street.

Double-circuit boilers have differences in the hot water supply system.

Some have a capacity (boiler) of the displacement characteristic of the model. This system is used when increased consumption hot water over 15 l/s. If you consume less than 15 l/s, then you should choose a boiler with a flow-through type of water heating.

Manufacturers rating

The undoubted leading countries in the production of boilers and gas equipment are Germany and Italy.

Such famous brands, like Bosch, Vaillant, Beretta, Ariston are breaking all sales records all over the world. Boilers from these manufacturers are represented by a wide range of models and modifications. Products are made from quality materials, has nice design, light weight and increased level security. Consumer reviews show that the boilers of the listed companies have a long service life.

Comparison table of the most popular models

Model	Number of circuits / combustion chamber type	Power/efficiency	Price
Bosch ZW 24-2 DH AE	2 / closed	23.6kW / 92.3%	RUR 26,630
Ariston BS II 24 FF	2 / closed	24.2kW ​​/ 93.0%	RUR 35,760
Beretta CITY 24 RSI	1 / closed	23.9 kW / 91.8%	RUB 37,050
	1 / open	24.0kW / 91.0%	RUR 40,490
Buderus Logamax Plus GB162-65 (condensing)	1 / closed	62.0kW / 110%	RUB 161,000

Functional features of each model

Bosch ZW 24-2 DH AE - German quality

Bosch ZW 24-2 DH AE

Electronic ignition, automatic power control in heating and hot water preparation mode, three-speed circular pump, autodiagnostics, fault indication, built-in traction control and overheating protection, can be adjusted to liquefied gas.

Ariston BS II 24 FF

Operates at reduced gas pressure (up to 5 mbar), is resistant to voltage surges, built-in condensate collector, extremely strong and durable burner and heat exchanger materials. Built-in function of protection against freezing, scale formation, blocking of a three-way valve and a circular pump, and a self-diagnosis function.

Beretta CITY 24 RSI

It is possible to convert the boiler to liquefied gas. There is a built-in gas pressure stabilizer, a microprocessor board that controls inputs, outputs and alarms.

Automatic bypass of the heating circuit, smoke removal pressure switch, which monitors the operation of the fan and smoke removal system. Anti-jamming protection function for the circulation pump, which is activated automatically every 24 hours after the last pump cycle.

Vaillant atmoTEC Plus VU INT 240-5-H

It is possible to convert to liquefied gas; Frost protection, anti-jamming protection for the circulation pump and three-way valve are installed. Automatic troubleshooting with subsequent display of information on the display.

Option “Winter/Summer”, it is possible to use the boiler in low-temperature systems.

Buderus Logamax Plus is our choice!

The ETA plus system is designed to optimize energy use and minimize overall operating costs.

ETA plus consists of a burner with modulated combustion control in the power range of 15 - 100%, a highly efficient heat exchanger for year-round condensation mode, a modulated circulation pump UPER 28-80 with capacity control (on special order).

The model has the ability to operate without maintaining a minimum volume flow.

The FLOW plus system ensures maximum utilization of the condensation heat of flue gases and low noise operation thanks to two components:

1. a simple hydraulic circuit without a bypass valve, because no minimum volume flow required;
2. circulation pump with adjustable capacity, which ensures maximum use of the heat of condensation of flue gases.

Which one to choose? Expert's conclusion

From the models given in the table, a comparative assessment can be made as follows:

• The most optimal and multifunctional are double-circuit gas boilers.
• Within the cost of a double-circuit boiler, you can purchase a single-circuit boiler, the functionality of which is inferior to the first only in the heating capabilities of the device.

The most advanced and productive are condensing boilers. This type of boiler is very economical, with high level Efficiency True, they are much more expensive, and they also require certain conditions to operate all the functionality included in them.

You should immediately decide for what purposes you are going to purchase a wall-mounted gas boiler: only for heating the room, or do you want it to additionally heat water.

The most acceptable in terms of price-quality ratio are double-circuit boilers.

Along with other types of boilers, they are equipped with more extensive functions and safety sensors.

Buy a boiler with a closed combustion chamber and electronic ignition. The secondary heat exchanger must be of a separate type. These characteristics will significantly save gas consumption, extend the life of the boiler and, as a result, save your money.

Such equipment is quite durable and safe. To help in choosing the best option for heating equipment, a rating of gas boilers was compiled, which were especially popular in Europe and among our compatriots in the first half of this year.

Top five leaders in the production of gas heating equipment

The vast majority of heating gas equipment is represented on the domestic market for climate control equipment by European manufacturers, as well as some representatives of the Asia-Pacific Economic Community. Among the most popular in our country are manufacturers of gas boilers from Germany, Italy, the Czech Republic, Slovakia and South Korea.

The first place in the popularity ranking is shared by German gas boilers produced by the Vaillant Group concern and the Wolf company. The German brand Buderus shares second place among the most popular manufacturers with the German holding Viessmann, and third place was taken by the Slovak concern Protherm and the Italian company Baxi.

Comparison technical characteristics and the functionality of the products of these companies is quite difficult, since in many ways they are very similar to each other.

Review of products from leading brands

This review should begin with gas boilers, which took first place in the popularity rating not only among our compatriots, but also among European consumers. These are products of such German giants as Vaillant Group and Wolf.

Boiler equipment from Vaillant Group

Vaillant Group is a recognized leader in the production of heating gas boilers. On the domestic market, Vaillant Group is represented by almost all possible modifications of heating equipment:

1. Line of wall-mounted boilers. atmo TEC series with an open fuel chamber, turbo TEC series with a closed fuel combustion chamber.
2. Line of floor-standing boilers. The iro VIT series is equipped with an electronic security and self-diagnosis system, the avto VIT series is fully automated devices.

Single-circuit boiler units are designated by the letter index VU. A special feature of these heating devices is that almost all models are equipped with circulation pumps.

Double-circuit heating systems are designated by the letter VUW. In addition, boilers of this brand are produced in both standard (PRO) and modernized (PLUS) versions. The rated power of Vaillant boiler units varies depending on the model from 12 to 36 kW.

Heating equipment from Wolf

The company's products have been repeatedly awarded with certificates confirming their environmental friendliness and safety. On the domestic market, brand heating boilers are represented by:

1. A line of floor heating units. The FNG series can operate on both natural and liquefied gas, the CHK series has an exclusive design.
2. A line of wall-mounted boilers. The CGG series are double-circuit boilers, they can be either with an open or closed fuel chamber, the CGU series are single-circuit boilers with simple controls.
3. Condensing boilers of the MGK line.

Boilers for individual heating from Viessmann

The Viessmann concern's model range of heating devices is represented by the Vitopend line, which includes floor- and wall-mounted devices, with a closed and open fuel chamber. The performance of the units varies depending on the model and can be:

• for wall-mounted boilers from 10.5 to 31 kW;
• For floor installations up to 140 kW.

The main feature of devices from this manufacturer is that the boiler does not turn off the heat exchanger when consuming hot water, but simply increases productivity.

Heating equipment from Buderus

The products of this German manufacturer have become famous among our compatriots for their compactness and design features.

The line of wall-mounted devices is represented by a series of Logamax double-circuit boilers and Logamax plus condensing equipment. The floor line includes the Logano series, which is a bestseller for the first half of this year.

Protherm products

Gas boilers from this manufacturer are widely represented in Russia and occupy a strong position in the markets Eastern Europe. The most popular models include:

• a line of wall-mounted double-circuit heating systems of the Pantera series, which is perfect for heating and hot water supply of small private houses, cottages and individual apartments;
• the Cheetah series, characterized by an ideal price-quality ratio;
• the Lynx modification is a wall-mounted device for individual heating;
• Leopard boiler models adapted to work in gas mains with low pressure levels;
• the Bear line of floor-standing boilers, which are distinguished by their unpretentiousness, high performance and ease of control.

Boiler equipment "Baxi"

You can start your review of heating devices from the Italian company Baxi with their line of wall-mounted units:

• MAIN FOUR series, represented by two dual-circuit models with a power of 24 kW with an open and closed combustion chamber;
• there are 6 models in the Fourtech line, including 4 single-circuit and only two double-circuit models with different combustion chamber designs, power from 14 to 24 kW;
• the Ecofour modification differs from Fourtech only in components, the number of models, design and power are identical;
• the Luna 3 Comfort boiler series has 6 models, including an equal number of single- and double-circuit boilers with different types of combustion chamber, power from 24 to 31 kW;
• The Luna 3 Comfort Air series model range is represented by two turbocharged boilers with a capacity of 24 - 31 kW;
• the Luna 3 Avant series differs from previous models by the presence of an additional condensation heat exchanger, the power of the devices is 24 - 31 kW;
• SLIM is a line of floor-standing single-circuit boilers with an open combustion chamber, represented by 11 models with productivity from 15 to 116 kW.

The best gas boiler

A comparison of gas boiler equipment was carried out according to the following characteristics: design (wall-mounted, floor-mounted), functionality (number of circuits), gas combustion chamber (open, closed), gas consumption, m3/h, average cost.

In the nomination for the best floor-standing heating boiler, Baxi Slim 2300Fi received more votes. Double-circuit, with a closed combustion chamber. The power of the device is 29.7 kW with a gas flow of 3.49 m3/h. The average cost is 44 thousand rubles.

Advantages of the device: built-in 50 liter water heating tank, electronic indication and piezo ignition, multi-level security and self-diagnosis system.

The main disadvantage of the device is its high cost.

The Baxi Luna 3 comfort 240 Fi received the palm in the category for the best wall-mounted heating boiler. This is a dual-circuit device with a closed combustion chamber, with a power of 25 kW. Gas consumption at this performance is 2.84 m3/h. Cost 25 thousand rubles.

Main advantages: full adaptation to the peculiarities of the domestic gas supply, the ability to program for 7 days, a diagnostic system and multi-level protection, the presence of authorized service centers.

Disadvantages of the device: relatively high cost and sensitivity of the electronics to changes in mains voltage.