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Gas boiler 2-circuit wall top 10. Which gas boiler to choose. The best floor-standing gas boilers of the condensing principle of operation

We will talk about the types, features of operation, but most importantly, the rating of gas boilers for heating a private house will be presented. This information is useful to all those who are currently puzzled by the choice of heating equipment. The organization of heating the house and heating water for domestic use is a must for those who live or move to a private house. Gas equipment is considered the most effective and inexpensive to use. We will talk about him today in today's article.

What type of boiler to choose

The first thing you should pay attention to before buying is the output power of the system. This parameter is calculated taking into account the climatic zone in which the equipment will operate and the area of ​​\u200b\u200bthe premises that need to be heated. The calculation is not very difficult. Since in private houses the height of the ceilings rarely exceeds 3 m, you can attach yourself to the area of ​​​​the rooms. This parameter is multiplied by the coefficient for the installation region, and then divided by 10.

The correction factors have the following meanings:

1. For the southern regions, where there are no severe winters, it is 07,-0,9.
2. For the middle band, the coefficient is already growing significantly - 1-1,2.
3. In moderately cold climates, calculations are guided by numbers 1,2-1,5.
4. The most difficult thing is to warm up the house in the northern regions, where the coefficient from 1.5 can go up to 2.

A simple example. Let's take two buildings of 100 squares of the same size and energy efficiency. We carry out the calculation for the south: 100 * 0.7 / 10 \u003d 7 kW. For the north - 100 * 2/10 \u003d 20 kW. There is nothing complicated in such calculations, and you can choose a boiler for yourself. However, there are many nuances that even professionals cannot take into account without knowing how your house is built and how energy efficient it is. This means that if the building is poorly insulated, such calculations may be pointless.

The next point that you need to pay attention to is the way the boiler is installed. The organization of the space around and the safety of equipment operation will depend on it. There are two types here:

1. Floor boilers- this is powerful bulky equipment that requires a separate room (boiler room) for installation and normal operation. The power of such equipment can be simply huge, it has a very high efficiency, it is possible to instantly supply hot water to the draw-off point.
2. Wall mounted boilers- they are used to organize individual heating in apartments and small houses. They are very compact and can even be installed inside cabinets without taking up much space. The size of the equipment imposes some restrictions on it. In particular, all working parts (pump, burner, electronics and heat exchanger) are in close proximity to each other, which creates difficult operating conditions at constant elevated temperatures. Of course, the parameters of the devices are carefully calculated, but the overall service life of such systems is still much lower than that of floor systems.

Also, the small size limits such gas boilers in power, although in the southern regions they can freely heat houses up to 200-300 m².

It is also important to know what type of burner is installed in your boiler. This parameter affects not only the efficiency of the system, but not its appearance. Distinguish:

How gas boilers are arranged and work

Before proceeding with the review of different models, let's talk a little about the technical part of such equipment. Knowing the question will allow you to better navigate the functions of the boiler.

Table 1.Working parts of the boiler

Detail, photo	Description
	We have already talked a little about her. Flames burst from this part. The gas is ignited by a piezoelectric element.
	With the case, everything is clear - it is a metal box of the right size with a heat insulator that protects the internal parts from others, and those around from internal parts.
	In fact, this is a radiator, inside which heated water circulates through the tubes. A burner burns under the heat exchanger and heats the water inside it.
	This device forcibly pushes the coolant through the heating system. Everything is very clear here.
	Gas combustion products must be removed from the boiler so that they do not enter the room. To do this, a separate chimney route is installed, which is led out into the street through the walls or ceiling - depending on the type of boiler.
	In modern equipment, heating is completely controlled by electronics. Depending on the complexity of the heating equipment, the “brains” for it will also differ.

In general, simplified, the system works like this. The gas is supplied through the pipes to the boiler, where it goes straight to the burner, which is ignited by a piezoelectric element - previously this had to be done manually. The fuel begins to burn, releasing a lot of thermal energy, which is captured by the heat exchanger and transferred to the water inside it. So that the water does not boil and does not burst the heat pipes with pressure, it must be moved, constantly changing the heated coolant to the already cooled one - this work is performed by pumping equipment. Also, the gas boiler system is equipped with other devices so that it can be quickly controlled - pressure relief valves, gearboxes, combs, pressure gauges and much more. It all depends on the specific model.

Interesting to know! An important role in the reliability of the boiler is played by its security system, which prevents water from boiling, freezing, blocking the pump in case of failure or gas leakage. All these functions are implemented by special add-ons and sensors that cost a lot of money.

If the boiler is double-circuit, it can simultaneously heat the coolant in the heating system and water for hot water supply at home. The scheme of operation of such a boiler is more complex than the one that we described above.

What are the types of gas boilers

Table 2. Types of gas boilers

Type of gas boiler	Description
	Atmospheric and other burners are installed in boilers with an open combustion chamber. As we wrote earlier, they need a natural draft of air - it is taken from the room, and the combustion products are removed through the chimney. It is possible to install such a boiler only in a separate room, the volume of which will be three times the hourly gas exchange of the equipment. The advantages of the design include its simplicity - fairly easy repair and maintenance. No noise during operation - only pumps do this. Relatively low price and a large assortment. Disadvantages - low efficiency, the need for a chimney and a separate non-residential premises.
	There is no need to isolate such a boiler from the living space, since the chamber in it does not come into contact with the surrounding air in any way. In such boilers, coaxial chimneys are used, which are simply brought out through the wall to the street. In such a chimney there are two pipes - external and internal. One of their bottom is inlet, and the other is exhaust. The length of this pipe is small, which is very convenient to use. You can use such boilers even in apartments. Most often they are wall-mounted. The advantages of the equipment include: safety of work, small dimensions, no need for a separate room, ease of operation and quick installation. Among the shortcomings, we note the rather high cost and high noise level.

About the contours, in principle, everything is clear, so we will not go into too much detail. We only recall that double-circuit models simultaneously work with a heating system and hot water supply. There is no way to get confused in the choice.

There is another division into classes of gas boilers. Separately, we will not write about it, but will mention it in the course of listing models in our rating.

List of the best boilers for your home

In recent years, nothing supernatural and revolutionary has appeared on the boiler market, so you can turn your attention not only to the latest innovations, but also to proven systems.

wall models

Let's start with wall-mounted gas boilers. They are of condensation and convection types. The former are the most economical and productive, since not only the thermal energy released during the combustion of gas is used to heat water, but also the energy of condensing steam. The efficiency of such devices is very close to the coveted mark of 100%. Naturally, these boilers are more expensive, so we will list the best models on the market in this class separately. In the meantime, all about convection wall-mounted boilers.

Weissman boilers have always been distinguished by quality and reliability. They are assembled on one modular platform, which greatly simplifies repair and maintenance. The list includes three versions of this model - for 34, 30 and 24 kW. Depending on the region of installation, the power of such a boiler may be enough for a house of 250 square meters.

This copper has the compact case (400*340*725) that allows to install it in any rooms. The most powerful model of these consumes at the peak of 3.5 cubic meters of gas per hour - this is considered a very good indicator of efficiency. There are quick-detachable connectors on the hydroblock, there is a heating control system, depending on the ambient temperature. Innovative coaxial chimney protected from freezing, efficiency in the region of 93%, operating mode on liquefied gas and an intelligent equipment diagnostic system. Of the minuses, one can name the absence of a remote control panel, but this is not significant. The cost of a boiler in various online stores ranges from 42,000 to 60,000 rubles.

This boiler can immediately be recorded as a leader in our rating. Here is a product from a well-known German manufacturer. The average cost for this is 60,000 rubles. It also has a closed combustion chamber and a good coaxial chimney. Conveniently, the power of forced ventilation can be adjusted exactly along the length of the chimney.

The model has the highest efficiency in the class. Its walls are reliably protected from heating, which allows you to mount the boiler without indenting from the side wall. Able to work on liquefied natural gas. It heats the water in the DHW circuit very quickly - there is no need to drain it for several minutes. The system is compatible with the proprietary WRS control module, which can be mounted both on the boiler and as a remote control module. The boiler starts softly.

You can note the entire model range - the power varies from 9.4 to 24 kW. The system has 2 heat exchangers - one for each circuit. The expansion tank has a volume of 8 liters, which allows you to get a performance of 11.5 liters per minute of hot water.

We are falling into a more affordable price niche. Here the boiler from Italy Baxi feels good. This brand, in fact, is considered one of the most prestigious, but this particular model is inexpensive and performs well in practice.

It belongs to the fourth generation, which was developed specifically for Russia, and specifically, it is designed to operate at a reduced gas pressure at the inlet - 5 mbar. It is very convenient that the boiler has a separate temperature control system in the radiators and the underfloor heating system. The maximum power of the boiler is 24 kW. It has very modest dimensions - 299 * 400 * 730 mm.

Of the advantages, we note:

• water accounting system;
• post-circulation mode;
• use of a pump with an air vent;
• compatibility with solar collectors;
• separate temperature control;
• low pressure protection system;
• a pleasant price in the region of 38,000 rubles;
• remote thermostat and remote control.

The disadvantages include a small display on which information is displayed, how the cat cried.

Boiler Baxi Eco Four 1.24 F

Of the inexpensive solutions, we also note the goods from the Korean manufacturer Navien. These are boilers with a closed chamber, which are also adapted to our conditions. At a cost in the region of 28,000 rubles. they give excellent results. The boiler power can be 24 kW.

Pleased with the following features:

• frost protection - if the temperature of the coolant drops below 10 degrees, the heating and the pump will automatically start;
• remote control panel;
• stable work.

The boiler has a stainless steel heat exchanger. On the one hand, a minus, but on the other, a plus - the part is very strong and durable, and the efficiency of copper heat exchangers is boosted by turbocharging. Among the shortcomings, we note a little noise and unstable heating of hot water.

Let's move on to condensing wall-mounted boilers.

Boiler Navien Deluxe 24K

The German manufacturer Valiant offers its customers the highest quality heating equipment. The thermal power of this model is 24 kW - you already know how to recalculate the area of ​​\u200b\u200bthe room. The cost of such a model is on average 55,000-60,000 rubles.

Of course, the condensing boiler will have a much lower gas consumption with high heat transfer. The model has the option of enhanced water heating for hot water supply - it produces up to 24 kW. The boiler is equipped with a DIA system for collecting and analyzing information about the operation of the boiler. The equipment can work both from a coaxial chimney and from a conventional one. Suitable for heating systems with low temperatures.

The burner has a chamber for preliminary mixing of gas and air, which increases the efficiency of the boiler. There is an automatic control of combustion and ignition, due to the control of the consumed air. The pump can automatically switch from hot water to heating. The volume of the expansion tank is 10 liters.

With such a high quality, this boiler does not have the highest price. In addition to high quality, you can also note the beautiful design. Of the shortcomings, only vulnerability to power surges can be called, so a stabilizer is required.

Boiler Vaillant ecoTec plus VUW INT IV 246

This boiler is the most economical in its class. The price for it is already in the region of 100,000 rubles, but the quality, especially the high one, is always expensive. The main feature of this model is the presence of a cylindrical type Matrix burner. It is high-tech and has many micro nozzles. This structure minimizes heat loss. A steel ring-type heat exchanger also has high efficiency.

Efficiency of the device is 98%, two ways of heating hot water, small body, remote control, operation with liquefied gas, high-quality and smart electronics, easy repair. And this is not all the advantages of the model. There is only one drawback - the high price.

Boiler Viessmann Vitodens 100-W

Video - Rating of wall-mounted gas boilers

Floor models

Let's move on to floor boilers now. We will also first name the leaders of the convection type, and then the condensation type.

Before you is a single-circuit heating boiler from Weissman. It is low-temperature and has an open combustion chamber, which means that it will have to be installed in a boiler room. Its power is 29 kW. They will ask you for about 110,000-120,000 rubles for this in the store. Very productive system of the small size which traditionally differs in high quality of execution.

The heat exchange parts of the boiler are made of gray cast iron and flake graphite. The burner has a fuel pre-mixing chamber. Weather-compensated automation is very energy efficient. The ignition system is implemented in such a way that the boiler starts silently and efficiently. Such a boiler can be easily combined with storage units to provide hot water at home. I don’t want to consider a high price for such reliability and coherence of all components as a disadvantage, but this is what stops many users from such an acquisition.

Yes, and yet, such a boiler, when connected to the DHW system, cannot provide long-term heating of the water in the flow mode - you quickly fill the bathroom, and its temperature drops sharply. To avoid this, you need to spend water with a small pressure.

Boiler Viessmann Vitogas 100-F GS1D870

From the budget line of boilers of this type, we single out a model from the Slovak company Proterm. It costs about 60,000 rubles. The boiler is also single-circuit and has an open combustion chamber. Useful power is at the level of 26 kW, so it is enough for a small house.

Let's name the pluses:

• summer-winter mode;
• smooth power adjustment;
• informative display;
• heat exchanger protected from condensate and the possibility of replacing its middle section;
• small size and cooling circuit.

The remote control for such a boiler can only be purchased separately, which somewhat lubricates a good impression.

Boiler Prothrem Bear 30 KLOM

Of the condensing single-circuit boilers, we again note the model from Valiant. Power 34 kW for just some 180,000 rubles. It is very efficient and reliable, like all real German technology. DHW is realized by connecting an external storage boiler, as in previous cases. As an option, you can take a double-circuit boiler from the ECO series.

• The efficiency of the device is around 99%;
• modulating type burner;
• economical gas consumption;
• touch control panel;
• DIA system;
• flame and ignition control.

The disadvantage of the boiler is still the same - you need a voltage stabilizer, but at this price, these are already trifles.

Boiler Vaillant ecoVIT VKK INT 366

So, we walked through the most common models in our country from different price segments. We hope you find the material useful.

Video - Which boiler to choose: floor or wall

Maintaining an acceptable temperature in the room during the cold season is not only the key to a comfortable stay in it, but also a guarantee of the longevity of the house. Heating with electricity is expensive, with firewood it is not very convenient, it remains to choose the best gas heating boiler that has been proven over the years, and with its help create optimal conditions for living. There is so much of this equipment on the market and it is not cheap, so it is important to make a choice in advance, which will help make our rating.

This niche is considered very specific, so some companies specialize only in the creation of heating equipment. It is best to choose among them - both the quality is higher and the prices are lower.

The following manufacturers can be safely attributed to the best gas boiler companies:

• Buderus- one of the Bosch brands, only the prices for its products are somewhat lower and more affordable. The company threw all its efforts into the production of heating equipment for private homes. The range mainly includes models for wall mounting.
• Leberg- a rather middle-aged brand that appeared on the market in 1965. Its products are designed for the middle class consumer, the price range here is small - from 20,000 to 30,000 rubles.
• Bosch- the company is the most famous on the market and has been offering German quality since 1890. The line is dominated by wall-mounted models, both single- and double-circuit.
• Lemax is one of the few Russian manufacturers of gas heating boilers. It has both premium and budget offerings.
• Protherm- choosing equipment from this brand, you can be sure that there will be no problems with its maintenance due to the large number of service points.
• Baxi is a supplier of modern heating systems, operating since 1925. He was the first among such firms to receive the ISO9001 quality certificate for such products, and in 2001 he was noted as an “ecological manufacturer”.

When choosing a particular brand, you need to pay attention to the availability of service in your city.

Rating of the best gas boilers

The list was formed based on user feedback, in which special attention was paid to the frequency of breakdowns, the availability of repairs, and equipment efficiency.

• Thermal power;
• Number of contours;
• Chimney type;
• Installation method;
• Ignition type;
• Dimensions;
• Color;

How to choose a gas boiler for heating, you will see in this video:

The best wall-mounted gas heating boilers

This is an ideal solution for small spaces, because the equipment does not take up much space. It is compact, looks neat and easily fits into any interior. But, unlike floor models, the power here is somewhat less.

This is a wall-mounted gas boiler, in which, first of all, stable combustion thanks to the impulse tube is worthy of attention. The reviews indicate that it maintains a comfortable temperature, regardless of the level of gas pressure (from 9 to 30 mbar). Convenient is the ability to adjust the heating rate of the room by selecting one of the three pump operation modes. Even with the largest noise, there is practically no noise (the threshold does not exceed 39 dB). The user will always be aware of the current state of the system due to the illuminated display. The most thought out electrical connection. The water is also heated up to 60 °C.

Advantages:

• Silent;
• Convenient display;
• Optimization for the Russian market;
• Economical;
• Easy to operate;
• Compliance of the actual efficiency with the declared one;
• Frost protection.

Flaws:

• In severe frosts, it may malfunction.
• There is a marriage of the control board;
• Big weight.

average price- 28,600 rubles.

This is another popular double-circuit wall-mounted convection-type heating boiler. It needs liquefied or natural gas as fuel, it works stably at a power of 7-24 kW, even with pressure drops in the water supply. The tank here is larger than in the Leberg Flamme 24 ASD, its volume is 8 liters. The control is fully electronic, the ignition is automatic, which facilitates operation. The auto-diagnostic mode allows you to do without a specialist in case of minor breakdowns. The thermometer notifies you of the heating of the air in the room. Weight, as for a wall model, average - 32 kg. The model is adapted to Russian operating conditions.

Advantages:

• Works fast;
• Easy setup;
• Small size;
• Silent operation;
• Good choice of capacities;
• High efficiency.

Flaws:

• Sometimes adjustment boards “fly out”;
• Difficulties in repair;
• Marriage is common;
• Condensation quickly accumulates in the relay tubes, which causes an error;
• The warranty does not always apply.

Operating a gas boiler.

average price- 33,000 rubles.

The best floor gas heating boilers

They are much more powerful than wall models, but at the same time they weigh two or even four times more. The disadvantages include the high price, the need to install a chimney, very overall dimensions and high gas consumption. The main advantage is the ability to heat even large houses.

This is a convection gas boiler for heating with one circuit and an open type of combustion chamber. This can be a problem in small, poorly ventilated rooms. Among the advantages, it is worth highlighting the simple regulation of the temperature in the room due to the possibility of connecting a room thermostat. The soft start system prevents the equipment from overheating. A power of 12 kW is enough to heat an area up to 125 square meters. m. The level of efficiency here is lower than that of analogues (90%). Both mechanical control and operation on only one type of fuel - natural gas - can cause inconvenience. A rather large weight (62 kg) cannot be called a virtue either.

Advantages:

• Ignition does not depend on electricity;
• Three-year warranty;
• Advanced security system;
• Small cost;
• Quality assembly;
• Not heated;
• Moderate fuel consumption.

Flaws:

• Low resistance to corrosion;
• External control must be connected separately;
• Low power.

You can here.

average price- 18,000 rubles.

Lemax Premium-12.5N is the best gas heating boiler among the inexpensive and most affordable options.

This is a floor gas boiler for heating large areas, up to 350 sq. m. High efficiency is confirmed by the efficiency of 90-92%. The equipment is protected from overheating and in the event of a critical increase in temperature, it turns off automatically. The expansion tank holds up to 10 liters of coolant, this figure is more than that of competitors. There is a special system for controlling electric ignition and flame strength. The thermal power is not bad - 24.5-35 kW, but at the same time the noise level is upsetting - up to 55 dB. The device requires natural or liquefied gas to operate.

Advantages:

• Simple ignition;
• Spacious;
• Powerful;
• Has a built-in boiler for 90 liters;
• No accumulation of condensate.

Flaws:

• Too big;
• Very heavy;
• Complicated installation;
• Noisy;
• Pretty expensive.

Operation of the heating boiler.

average price- 65,000 rubles.

Protherm Bear 40 KLZ is one of the most expensive floor models.

This is a very powerful single-circuit boiler for floor installation with an efficiency of 90%. Ease of operation, intuitive electronic control and a high level of protection against low temperatures and overheating helped him enter the rating. To work, you need liquefied or natural gas, which makes it universal. In case of malfunctions, the self-diagnostic system is triggered. A plus is the ability to connect an external outdoor temperature sensor. Electric ignition is carried out smoothly, as well as flame modulation, which eliminates the risk of overheating of the device.

Advantages:

• No smell;
• Works not noisy;
• Heats up the air quickly
• Doesn't crash;
• Does not turn off at low temperatures.
• Doesn't get hot;
• Powerful (40 kW).

Flaws:

• Requires the involvement of professionals to connect;
• Not available everywhere, pre-order required;
• Big weight (158 kg);
• Expensive;
• Weak ignition block.

Here is the detailed gas heating boiler

average price- 64,000 rubles.

Which heating gas boiler is better to choose

For buildings up to 200 sq. m. a wall-mounted boiler with a power of up to 20 kW will be enough. This figure is calculated according to the following formula - 1 kW x for every 10 m of a heated room with a ceiling height of 3 m. With a large quadrature, you will need a model of 30 kW and preferably a floor model. If you don’t need to heat the water if there is a boiler or column at home, then you don’t have to overpay for the second circuit.

1. For buildings whose quadrature does not exceed 150 sq. m., you can choose Lemax Premium-12.5N.
2. To heat rooms with a total area of ​​110 to 240 sq. m. will help Bosch Gaz 6000 W WBN 6000-24 C.
3. For large houses ranging from 150 to 350 sq. m. models Buderus Logamax U072-24K and Protherm Bear 40 KLZ are suitable.
4. If you only need to raise the air temperature and there is no need to heat the water, then the Baxi SLIM 1.400 iN will be just right.
5. For work in the "warm floor" mode, Leberg Flamme 24 ASD is the best suited.

This video is about how to choose a gas boiler for heating:

The rating contains only the best gas heating boilers for houses and apartments, which have collected the most positive feedback. And that is why the choice in their favor certainly should not disappoint you.

The choice of a gas boiler is the responsibility of the consumer. And if experts help you correctly calculate the power, then you will have to choose the right model with a certain set of characteristics and functions yourself. To make the right purchase, knowing the selection criteria, the advantages and disadvantages of a particular gas equipment, our rating of the best wall-mounted boilers will help.

Gas boilers are divided into different types according to certain parameters:

• by the number of thermal circuits;
• by type of performance;
• by power;
• according to the method of heating;
• by type of combustion chamber;
• according to the degree of dependence on electricity;
• by the number of control modes;
• by type of burners;
• by type of ignition;
• according to the method of removal of combustion products;
• according to the material of the heat exchanger;
• by manufacturer;
• on a set of additional functions.

It is a difficult task to choose the optimal attachments that will effectively heat the room, at the same time heating water for hot water supply in a country house or apartment, fit into the room in size, and have the necessary functionality for efficiency and comfort. Knowing the principle of dividing boilers into groups, it will be easier to find the modification of equipment you need specifically with an eye on the top of the best.

By the number of thermal circuits

A thermal circuit is a closed system of pipelines, a boiler, and equipment that heats a room or coolant. Gas boilers are standardly divided into:

• single-circuit VU (the task of the circuit is one - heating);
• double-circuit VUW (each circuit has its own engineering function: 1 - heating, 2 - water heating for hot water supply).

In the first case, the efficiency of a gas boiler is aimed at heating the coolant (water, antifreeze) for space heating, and the owners receive hot water using other equipment, such as an electric boiler.

In the second case, the coolant is heated in the 1st circuit for the heating system, and in the 2nd circuit for hot water supply. Some models can, according to the instructions, be turned from a two-circuit into a single-circuit.

By type of performance

There are 2 types of boilers on sale:

1. floor-standing (more powerful, heavy, often double-circuit, having separate additional equipment: a circulation pump and an expansion tank);
2. wall-mounted (with less power, more affordable, lighter and more compact, where all the necessary working equipment is built inside).

Wall-mounted boilers have really conquered consumers. Both the owners of private houses and apartments in apartment buildings with individual heating prefer wall-mounted design.

By power

Gas wall-mounted boilers produce small (4 - 15 kW) and medium power (15 - 25 kW). Powerful appliances (25 - 40 kW and even 100 - 150 kW) are also available in wall-mounted versions, but are less in demand.

The most popular models in terms of approximate power:

• 10 kW;
• 12 kW;
• 15 kW;
• 20 kW;
• 25 kW;
• 30 kW;
• 35 kW.

It is better to entrust the calculation of power to specialists or at least convenient online calculators that have been developed by many manufacturers of gas heating equipment. The old familiar formula that considers power in the proportion of 1 kW or 1.2 kW with a 20% margin per 10 m² does not work for most country houses with huge ceilings, panoramic windows, reinforced or insufficient insulation.

According to the heating method

The principle of heating for such equipment is divided into:

• traditional convection;
• condensing.

In a convection gas boiler, fuel burns, water heats up, and waste products go into the chimney. In condensing technology, the efficiency is 20-30% higher due to the use of not only the energy of the fuel, but also the resulting condensate, i.e. steam energy. Such a boiler, when equipped with an outdoor temperature sensor and a coaxial chimney, becomes more profitable than the traditional model. Low-temperature condensing gas boilers in hinged design are the most advanced in terms of efficiency.

Type of combustion chamber

Gas boilers have modifications according to the type of combustion chamber:

• open;
• closed.

The type of chimney depends on the type of combustion chamber: natural draft for open (more often for floor-standing boilers), forced draft (more often for wall-mounted boilers). Almost all modern wall-mounted units come with a closed firebox and exhaust output to a coaxial chimney pipe.

According to the degree of dependence on electricity

It seems that the 21st century is outside the window, and not everywhere the dependence of the operation of gas equipment on the availability of electricity is useful. Indeed, in areas where there are problems with power outages, a great distance from large settlements, etc., a boiler that works autonomously will be more reliable. According to this parameter, the technique is divided into:

• non-volatile (the operation of a gas boiler does not depend on electricity supply);
• dependent on the supply of electricity (no electricity - the operation of the boiler stops).

Where there are frequent voltage drops in the network, low voltage (160-180 V, not 220 V), it is imperative to provide for the installation of a voltage stabilizer, otherwise many imported boilers with capricious "brains" will simply refuse to heat.

By the number of control modes

There are the simplest devices with 1 mode in which fuel is supplied. There are more common ones with 2 modes (average 30-40% and maximum 100% power). The most economical models are multi-mode, which allow you to automatically or independently adjust the fuel supply depending on the street temperature from 10 to 100%.

The burners control the modes:

• single-stage (then the boiler will be single-mode);
• two-stage (there will be 2 modes);
• two-stage with smooth modulation of switching modes;
• modulating (several modes), which come with electronic, pneumatic and mechanical control.

Type of burners

Burners can be:

• atmospheric (when their work (the strength of the burner flame) depends on the gas pressure in the line);
• inflatable (when the built-in fan blows air).

According to the material of manufacture, they distinguish:

• steel;
• from stainless steel.

According to the principle of the flame:

• blast (with a fan);
• diffuse (industrial equipment);
• injection (with injection).

By type of ignition

Ignition in modern boilers happens:

• electric;
• on piezoelectric elements.

For non-volatile boilers of Russian manufacturers, piezo ignition is more common. For imported ones with a lot of automation - electric. But recently, most of all manufactured boilers are equipped with an electric spark for ignition, it is safer. If you have an area with frequent and strong winds, then the electric type of ignition should be a priority. So that after the flame is blown out by the wind, it is ignited automatically by an electric spark.

According to the method of removal of combustion products

Thrust is engaged in removal of products of combustion of fuel. According to its type, traction is:

• natural (chimney);
• forced with turbocharger.

If there is a separate boiler room and problems with power supply, then a natural draft boiler can be considered. But now all wall-mounted boilers are taken mainly to small rooms, and the arrangement of a coaxial chimney is a budget and comfortable solution. Yes, and turbo ventilation is much safer, so as not to burn out.

life hack

Freezing of a coaxial pipe can be prevented in several ways:

• insulate the outer pipe with mineral wool and a protective casing made of plastic pipe;
• cut the outer or increase the inner pipe by 15-20 cm so that a dew point is not created;
• initially take the maximum length of the coaxial chimney recommended by the manufacturer;
• increase the slope to the ground by 2-3 cm.

According to the material of the heat exchanger

The heat exchanger is the most wearable element of the boiler, therefore, the period of trouble-free operation of all equipment depends on its material. They are produced:

• stainless steel;
• copper;
• cast iron (very rare for wall-mounted due to the weight of the metal).

Table of consumer qualities of heat exchanger materials:

By manufacturer

Leaders of the world gas equipment:

• German manufacturers (brands: BUDERUS, BOSCH, VAILLANT, VIESSMANN, WOLF);
• Italian (FERROLI, BAXI, ARISTON);
• Korean (NAVIEN);
• Slovak (PROTHERM).

And, of course, domestic manufacturers, whose products are distinguished by unpretentiousness and survivability in the difficult conditions of the Russian winter and the unstable operation of the gas system and electricity supply:

• "ZHMZ";
• "Lemax";
• "NEVA".

According to the set of additional functions

To organize hot water supply, single-circuit boilers must be supplemented with an indirect heating boiler. Double-circuit ones also do not always do a good job of providing hot water supply, because. flow heating has its drawbacks: when you open a tap at the second point, barely warm or cold water flows from the first. Therefore, for double-circuit boilers, a boiler is also an option.

In regions with severe climatic conditions, the boiler must be protected against freezing. In expensive models, it is built-in.

For the “smart home” system and the desire of the owners for maximum comfort, the equipment is equipped with numerous sensors and relays for controlling processes (traction sensor, outdoor and room temperature, carrier temperature, auto-off, protective relays, etc.).

A gas boiler in the presence of a gas main and communications connected to them is the most economical option for heating and hot water supply. In addition to the ability to save on heating and hot water, gas-fired boilers have the following advantages:

• high percentage of efficiency (up to 100 - 110% for condensing models);
• compact wall-mounted;
• require little attention: it is possible to completely give control and control to automation;
• comfort of domestic use: houses are always clean;
• available non-volatile models allow you not to be left without heating and hot water when the electricity is turned off;
• a huge selection of modifications will help you choose the best boiler for a particular room and task;
• relative affordability and serviceability in case of failure.

There are also disadvantages, but they are not critical:

• bureaucratic burden when connecting and servicing;
• large rooms require floor boilers and a separate boiler room;
• a boiler with an open firebox must be equipped with a convection chimney with natural draft, which takes oxygen from the room, so this equipment is brought to the boiler room;
• turbocharged models are noisy;
• volatile boilers need to be equipped with extremely expensive UPS.

Manufacturers produce a huge number of modifications of wall-mounted boilers so that the consumer can choose something that is most optimal and with a minimum number of disadvantages for their situation. The choice itself is best based on the specific tasks of the boiler and the parameters of the room for heating.

• heated area (we are looking for models for rooms up to 100 m², up to 200 m², up to 300 m² and over 350 m²);
• the number of circuits and the required volume of hot water supply (single-circuit with a built-in tank for a small apartment and 1-2 people, single-circuit with an indirect heating tank for a family of 3-4 people, double-circuit with one draw-off point, with two, etc.);
• volatile, but economical, automated and ultra-modern or non-volatile, but very simple and unpretentious with mechanical control and a minimum of sensors (in areas with frequent and long power outages, the owners risk being left without heating in winter by choosing a volatile boiler);
• if there is a separate boiler room, it can be taken with an open chamber, or it can be closed for a coaxial chimney, in a separate room it is easier to organize a bundle of a wall-mounted single-circuit boiler + a heating tank for hot water supply;
• if there are problems with pressure in the gas main, a voltage drop in the mains, then look for boilers whose “brains” can withstand it, not all expensive imported models will be able to ensure trouble-free operation in our extreme conditions;
• pay attention to additional functions not only for the boiler, for example, it is very convenient to have a chimney with frost protection, otherwise you will have to manually get rid of terrible icicles on the coaxial pipe or on the roof near the chimney, which will stop the boiler;
• remember that the boiler will be only a part of the heating system, not only it is important, but also the optimally coordinated and correct operation of all components;
• think over the maximum protection against gas leakage, do not save on safety, relying only on the brand or the reliability of modern electronics.

One of the signs of a malfunctioning gas boiler is an increase in condensate on the windows.

The best wall-mounted gas boilers

A budget model of a double-circuit boiler from a well-known Russian manufacturer who has updated product lines. The filling is European, economical, because. The efficiency is about 90 - 92%. Closed chamber with forced removal of combustion products. Ideal for small spaces up to 100 m² as power is only 11 kW. Inside there is a bithermic heat exchanger, soundproofing of the walls, therefore, low noise. Weighs a little, about 28 kg, compact. Access for maintenance is conveniently organized - the front panel and walls are simply removed. Protection against formation of condensate. It is possible to screw on extras: an outside temperature sensor, a room thermostat, etc.

Cons: the design is not the most elegant, low-power for a double-circuit with hot water supply.

This budget technique is a replacement for the legendary model of the previous generation EGIS. The model is suitable for rooms from 150 to 200 m². A 24 kW dual circuit with 2 independent heat exchangers made of different materials: the primary one is made of aluminum, which is very, very controversial, but the DHW heat exchanger is made of copper, which, of course, pleases. The efficiency is about 93%. There are some handy automations for comfort. The economy mode is thought over: summer, summer/winter. This allows you not to drive heating in the summer, but to turn on only the hot water circuit. There is a condensate collector.

Cons: the aluminum heat exchanger is short-lived, a small flow tank.

Double-circuit 20 kW boiler with separate heat exchangers for each circuit from a proven Russian brand. A durable filling is thought out: brass hydraulics, copper primary heat exchanger, and stainless steel secondary heat exchanger. High efficiency up to 92% is achieved due to the enlarged closed firebox. You can save money by using the modulation mode with adjustment from 9 to 19 kW, and in the summer you can generally switch to the “Summer” mode in order to receive only hot water without heating. Weight and dimensions are small. Good design. Build quality. For rooms up to 150 - 180 m².

Cons: expensive and noisy compared to imported counterparts.

Powerful double-circuit wall mount 24 kW. Efficiency is almost 93%. Economical due to power regulation and "Summer" mode. Electronic control, high-quality assembly. Plate heat exchangers, which is a definite plus for durability. One is copper, the other is stainless steel. The Italian brand has created a worthy product. Suitable for rooms up to 200 m². Provides accurate setpoint temperatures for domestic hot water and heating. Has many levels of protection. It is possible to connect a warm floor and an external remote control.

Cons: for some reason, a pressure gauge for controlling water pressure is located on the bottom of the case, on its lower plane, a small tank, not enough hot water.

German heavyweight 36 kg with anti-corrosion coating and 2 circuits. 2 separate heat exchangers: copper and stainless steel. There is a "Summer" mode, power control depending on the street temperature. Efficiency is about 90%. Closed furnace, turbocharging. Its 24 kW is enough for a house up to 200 m². Despite the fact that this is a budget line, it is also distinguished by stable German quality and reliability.

Enough budget model from a German brand. There are 2 circuits with a copper and stainless steel heat exchanger. A power of 12 kW is enough for a house or apartment up to 100 m². Electronic control, economical. High efficiency up to 92%. Closed combustion chamber. It is possible to install an external temperature sensor.

Cons: the whole series has a problem with the “brains”, it often gives an AE error, there is no protection against condensate, it can turn off in severe frost because of this, the assembly may turn out to be Polish or Russian.

German in origin, but Russian in assembly. A 24 kW wall-mounted double-circuit heater will heat a house up to 200 m². Separate heat exchangers. Easily accessible copper plate heat exchanger. Electronic "brains" help to comfortably manage and save, but they also cause problems. Average weight - 34 kg. Not the noisiest, rather quiet. Safe. For extreme conditions in Russia: low pressure, voltage drops, frost.

Cons: frequent 6A error due to a defective board, an unreliable all-plastic cold water make-up tap, expensive components.

A powerful 24 kW dual circuit is suitable for rooms up to 200 m². Controlled from the remote control. Lightweight and compact. Korean assembly, budget model from a proven brand from South Korea. The efficiency is about 90%. Electronic control, power adjustment, save gas. Bithermic heat exchanger. A very popular boiler among the people, most of them work without serious breakdowns.

Cons: very noisy, can hum, click, make pops when ignited, often turns on / off, not all owners are lucky with reliability, heats water very poorly, does not pull on hot water.

Another inexpensive two-circuit from a brand from Slovakia, but Turkish assembly. Its 24 kW is suitable for houses up to 200 m². Closed furnace. Separate heat exchangers: primary copper and secondary stainless steel. Mechanical control. Doesn't make much noise. There is a smooth power adjustment. The efficiency is high - almost 93%. Good degree of protection. Lots of services, parts available.

Cons: crooked assembly, 1 heating circuit is turned off when working on hot water, which is very inconvenient in severe frosts, inconvenient wheel control.

24 kW reliable 2-circuit from one of the best German manufacturers for houses up to 200 m². Design with 2 separate heat exchangers: copper primary and stainless steel secondary plate. Water tank 9 l, quite a lot. Closed combustion chamber. Lightweight and compact. Power modulation from 30 to 100%. Efficiency up to 93%. The model is transformed into a single-circuit device by simple manipulations with the second heat exchanger. The boiler has many duplicating degrees of protection, the automation is reliable, there are no failures in it. But the "brains" as a whole are not capricious, tk. the boiler is adapted to Russian conditions, but there are failures. It is thought out for the comfort of maintenance, it is convenient to crawl everywhere. According to the owners, the German-assembled boiler is indeed one of the most reliable and comfortable in everyday life, but there are more negative reviews about the Turkish assembly.

Cons: noisy, may give errors that are not relevant, inconvenient for providing hot water for a large family.

• Only professionals can install the heating system. The safety and reliability of a gas-fired system is more important than perceived savings.
• It is necessary to observe the maintenance of the gas boiler and chimney in a timely manner, if the instructions are bad, then you can find maintenance tips and a video demonstrating maintenance on the network.
• It is important to choose not only the boiler that is optimal in terms of power, but to properly arrange the chimney so that the entire system works efficiently and without failures, chimney problems reduce the efficiency of the heating system and the durability of the boiler.
• Do not install a computer UPS on gas boilers.
• If the water is hard, then be sure to equip the inlet to the house with a filter to soften the water, this will extend the life of the heat exchanger.
• The manufacturer's warranty is valid only if several requirements are met: the first commissioning by the service center specialists, the provision of the UPS boiler, repair only by licensed craftsmen.

What you need to know when choosing a gas boiler for heating a residential building. Variety of water heaters. Basic selection options. Reliability of wall and floor boilers.

What is the most reliable gas boiler- a question that every developer has to face when choosing it. At the same time, it should provide heating of rooms, be a source of hot water, economical, easy to manage, and safe to use. There are not many requirements. And what kind of boiler matches them? We understand.

To answer this question, first of all, you need to know the main characteristics and functionality of the selected product.

Option gas boiler with underfloor heating

When choosing, first of all, attention is paid to the following parameters:

• power;
• the number of contours;
• installation method;
• management during operation;
• the presence and type of ventilation at the installation site of the boiler.

Power is one of the main characteristics. The performance of the entire space heating system, including water heating, depends on it. It is generally accepted that heating 10 m² of space requires 1 kW of power.

By type, boilers are divided into convection and condensing. The former use only the energy of gas combustion in their work, the latter additionally take the energy of water vapor removed along with the smoke.

The functionality of the boiler depends on the number of circuits. Single-circuit is intended only for heating. Double-circuit is able to additionally provide hot water to several points - underfloor heating, bathroom, bath.

According to the method of installation, heaters are divided into wall (hinged) and floor. The first ones are usually low-power, designed to heat small rooms. The second is much more powerful. Used in cottages, private houses. Fully satisfy all the needs of the consumer in heating and hot water.

Gas boiler control can be manual and automated. Automatic control requires an increase in costs when installing a heating system, but then quickly pays for itself and brings significant savings.

The installation site of the boiler must be equipped with ventilation, which can be natural or forced.

Thus, before talking about the most reliable boiler, you need to decide on its choice.