Which company to choose a gas boiler for heating. Gas boilers: reliability rating

Before talking about the reliability and efficiency of water heating devices, it is necessary to determine the conditions under which they will be operated. Only in this case can you make the right choice of heater type. And only then decide questions about the quality and reliability of the selected gas boiler model.

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

Which type of boiler should you prefer?

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

Correction factors have the following meanings:

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

A simple example. Let’s take two buildings of 100 square meters that are identical in size and energy efficiency. We carry out the calculation for the south: 100*0.7/10 = 7 kW. For the north – 100*2/10 = 20 kW. There is nothing complicated in such calculations, and you can choose your own boiler. 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. What this means is that if the building is poorly insulated, carrying out such calculations may be pointless.

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

1. Floor standing 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 enormous, it has a very high efficiency, and it is possible to instantly supply hot water to the water collection point.
2. Wall 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 operating parts (pump, burner, electronics and heat exchanger) are located 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-standing ones.

Also, their small size limits the power of such gas boilers, 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. There are:

How gas boilers work and work

Before we begin reviewing different models, let's talk a little about the technical part of such equipment. Knowledge of the issue 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 come out of this part. The gas is ignited using a piezoelectric element.
	Everything is clear about the case – it’s a metal box the right size with a heat insulator that protects the internal parts from the surrounding parts, and the surrounding parts from the internal parts.
	Essentially, it is a radiator, inside of which heated water circulates through tubes. A burner burns under the heat exchanger and heats the water inside it.
	This device forces the coolant through the heating system. Everything here is very clear.
	Gas combustion products must be removed from the boiler so that they do not enter the room. For this purpose, 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 electronically. 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 connections to the boiler, where it goes directly 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. To prevent the water from boiling and the pressure breaking the heating lines, it must be moved, constantly changing the heated coolant to an already cooled one - this work is performed by pumping equipment. The gas boiler system is also equipped with other devices to make it possible to quickly control it - pressure relief valves, reducers, combs, pressure gauges and much more. Everything here depends on the specific model.

Interesting to know! An important role in the reliability of the boiler is played by its safety system, which prevents water from boiling, freezing, pump blocking in case of failure or gas leakage. All these functions are implemented by special add-ons and sensors, which 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 to the house. The operating diagram of such a boiler is more complex than the one we described above.

What types of gas boilers are there?

Table 2. Types of gas boilers

Gas boiler type	Description
	Atmospheric and other burners are installed in boilers with an open combustion chamber. As we wrote earlier, they require natural air draft - it is taken from the room, and combustion products are removed through the chimney. Such a boiler can only be installed 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 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 has no contact with the surrounding air. Such boilers use coaxial chimneys, which are simply discharged through the wall to the street. In such a chimney there are two pipes - external and internal. One of them is a supply bottom, and the other is an exhaust one. 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: safe operation, small dimensions, no need for a separate room, ease of operation and quick installation. Among the disadvantages, we note the rather high cost and high level noise.

In principle, everything is clear about the contours, so we won’t go into too much detail. Let us only recall that dual-circuit models simultaneously work with the heating system and hot water supply. There is no way to get confused in the choice here.

There is another division by class of gas boilers. We won’t write about it separately, but will mention it as we list the models in our rating.

List of the best boilers for your home

In recent years, nothing extraordinary or 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 come in condensation and convection types. The first ones are the most economical and productive, since they use not only thermal energy released during combustion of gas, but also the energy of condensing steam. The efficiency of such devices is very close to the cherished mark of 100%. Naturally, these boilers are more expensive, so best models We will list this class separately on the market. In the meantime, all about convection wall-mounted boilers.

Weissman boilers have always been distinguished by their quality and reliability. They are assembled on one modular platform, which greatly simplifies repair and maintenance. The list includes three versions of this model - 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 boiler has a compact body (400*340*725), which allows it to be installed in any room. The most powerful model of these consumes 3.5 cubic meters of gas per hour at its peak - this is considered a very good indicator of efficiency. The hydraulic unit has quick-release connectors, and there is a heating control system, depending on the ambient temperature. The innovative coaxial chimney is protected from freezing, the efficiency is around 93%, it operates on liquefied gas and has an intelligent equipment diagnostic system. One of the disadvantages is the lack of a remote control panel, but this is not significant. The cost of a boiler in different online stores ranges from 42,000 to 60,000 rubles.

This boiler can immediately be considered a leader in our rating. Here is a product from a famous 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 according to the length of the chimney.

The model has the highest efficiency indicators in its class. Its walls are reliably protected from heat, which allows you to mount the boiler without indentation from the side wall. Can operate on liquefied natural gas. It heats up 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 either on the boiler or as a remote control module. The boiler starts softly.

The entire model range can be noted - 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 for a productivity of 11.5 liters per minute of hot water.

We fall into a more affordable price niche. The boiler from Italy Baxi is doing well here. 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 inlet pressure of 5 mBar. It is very convenient that the boiler has a separate temperature control system in the radiators and the heated floor system. The maximum boiler power is 24 kW. It has very modest dimensions - 299*400*730 mm.

Among the advantages we note:

• water consumption accounting system;
• post-circulation mode;
• using a pump with an air vent;
• compatible with solar collectors;
• separate temperature control;
• low pressure protection system;
• nice price around 38,000 rubles;
• remote thermostat and remote control.

The disadvantages include a small display on which information is displayed as if the cat was crying.

Boiler Baxi Eco Four 1.24 F

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

Pleased with the presence of the following functions:

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

The boiler contains a stainless steel heat exchanger. On the one hand, it’s a minus, but on the other, it’s a plus – the part is very strong and durable, and the efficiency of copper heat exchangers is increased due to turbocharging. Among the disadvantages, 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 convert it to the area of ​​the room. The cost of such a model is on average 55,000-60,000 rubles.

Of course, a condensing boiler will have much lower gas consumption with high heat transfer. The model has the option of enhanced water heating for domestic hot water – 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 operate either from a coaxial chimney or from a conventional one. Suitable for heating systems with low temperatures.

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

With such high quality, this boiler does not have the highest price. In addition to high quality, one can also note the beautiful design. The only disadvantage is vulnerability to voltage surges, so a stabilizer will be required.

Boiler Vaillant ecoTec plus VUW INT IV 246

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

The efficiency of the device is 98%, two ways to heat hot water, small body, remote control, work with liquefied gas, high-quality and smart electronics, easy repairs. And these are 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 now to floor-standing boilers. Also, first we will name the leaders of the convection type, and then the condensation type.

Here is a single-circuit heating boiler from Weissman. It is low-temperature and has an open combustion chamber, which means it will have to be installed in the boiler room. Its power is 29 kW. They will ask you for one in the store for about 110,000-120,000 rubles. A very productive system of small size, which traditionally differs high quality 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 tanks to provide the home with hot water. I don’t want to consider the high price for such reliability and coherence of all components as a disadvantage, but this is precisely what stops many users from making such a purchase.

Yes, and also, such a boiler, when connected to a hot water supply system, cannot provide long-term heating of water in flow mode - you quickly fill the bath, and its temperature drops sharply. To prevent this from happening, you need to use water at a low pressure.

Boiler Viessmann Vitogas 100-F GS1D870

From the budget line of boilers of this type, we highlight 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. Net power is 26 kW, so it is enough for a small house.

Let's name the advantages:

• summer-winter mode;
• smooth power control;
• informative display;
• heat exchanger protected from condensation 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 blurs the good impression.

Boiler Prothrem Bear 30 KLOM

Among condensing single-circuit boilers, we again note the model from Valiant. Power 34 kW for just 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 burner;
• economical gas consumption;
• touch control panel;
• DIA system;
• flame and ignition control.

The boiler has the same drawback - it needs a voltage stabilizer, but at this price these are minor things.

Boiler Vaillant ecoVIT VKK INT 366

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

Video - Which boiler to choose: floor or wall mounted

The heart of an autonomous heating system is a hot water boiler. Both the air temperature in the house and the amount of heating costs depend on its quality, functionality and efficiency. So as not to make a mistake in choosing this important device, you need to study every detail and function of the device. The rating of wall-mounted gas heating boilers will help you save time on getting familiar with the equipment - the top positions in it are always occupied by equipment that has earned the trust and recognition of other users.

Classification of gas boilers

Lightweight and compact wall-mounted gas heating boilers are suitable for autonomous systems in individual cottages and city apartments. This group combines several types of equipment that differ fundamentally in terms of design and operation. Here is a list of the most important design features that you should pay attention to before choosing a boiler:

1. Number of circuits: single-circuit ones are focused only on heating, and double-circuit ones provide hot water supply functions in parallel.
2. Combustion chamber type: open or sealed (closed).
3. Exhaust gas removal method: natural or forced.
4. Energy dependence: non-volatile wall-mounted gas heating boilers operate without being connected to electricity.
5. Burner type: atmospheric or modulating with automatic regulation power.

Diagram of a double-circuit boiler with a modulating burner and forced draft

Consumer ratings: independent choice of buyers

The best condensing boilers

Condensing boilers are more expensive, but the overpayment is more than compensated by economical gas consumption and high efficiency of heat generators, amounting to at least 95-98%. It is believed that the best wall-mounted gas heating boilers of this type are produced by the German company Viessmann.

Taking the lead in the condensing appliance segment is the compact and elegant Viessmann Vitodens 100-W with a maximum output of 35 kW and a hot water preparation speed of 14 liters per minute.

The second position in the ranking is occupied by the single-circuit Ariston Clas Premium Evo System 35 FF, adapted for low gas pressure. The device is equipped with a primary copper heat exchanger and a secondary plate-type steel heat exchanger. The maximum power of the device is 35 kW.

On the third line is the German Bosch Condens 5000 FM heat generator, which supports operation in a cascade and with solar collectors. The device is equipped with electronic control of the composition of the gas-air mixture and a unique heat exchanger with patented tube configuration technology.

Two in one: the best models of dual-circuit heat generators

Combination boilers solve two important problems at once: they heat the house and provide it with hot water. These devices are in demand among owners of individual buildings and apartment residents who do not want to depend on centralized hot water supply.

The Vaillant turboTEC PRO VUW with forced exhaust of flue gases and a built-in plate water heater with a capacity of 11.5 liters of hot water per minute earned the most positive reviews in this group. The device is equipped with a closed combustion chamber and a modulating burner. The efficiency of the device is 93%, power is from 8 to 24 kW.

VaillantturboTECPROVUW

Second place in the ranking is occupied by the Italian Baxi Main Four 240 F, capable of preparing 13.7 liters of hot water per minute. Baxi gas wall heating boilers are equipped with a closed chamber. The devices have traction control sensors, a thermostat to prevent water overheating, and protection against freezing and scale.

In third place is the German Bosch ZWA 24-2A with an efficiency of 95% and a water heating rate of 11.4 liters per minute. The device easily copes with servicing a house with an area of ​​up to 240 square meters. meters. The compact boiler is equipped with a three-stage circulation pump and an eight-liter expansion tank.

The Neva Lux 7218 double-circuit gas boiler was not included in the top ten, but it can be noted as one of the most affordable devices. The device is equipped with a biothermal heat exchanger, modulating burner, electronic control and LCD display. The domestic boiler is aimed at heating a house with an area of ​​up to 180 square meters. meters.

Five leading manufacturers of wall-mounted water heating boilers

The manufacturer plays an important role in the selection of boiler equipment. 70% of consumers are willing to overpay for a brand if its name is associated with product quality.

1. Viessmann

The first position in the customer trust rating is occupied by Viessmann, a reputable German manufacturer of energy-saving equipment. Wisman condensing wall-mounted gas heating boilers are equipped with a simulated burner that maintains combustion when the gas pressure is insufficient.

1. Protherm

In second place is Protherm, a manufacturer of high-quality and functional equipment at an affordable price. The lineup heat generators of this Slovak brand include several lines of devices with open and closed combustion chambers and a wide power range.

In third place in the ranking of wall-mounted gas boilers is the leading European manufacturer equipment for boiler rooms Wolf. The German company's product range includes models with different device combustion chamber, with built-in heat exchangers for hot water and the ability to connect a boiler.

1. Buderus

The fourth place went to the German leader Buderus. The Logamax series of wall-mounted boilers is aimed at Russian consumers and is suitable for operation under conditions of gas and water pressure differences.

Top five most popular manufacturers Russian users is closed by the Italian company BAXI, whose product range includes single-circuit and double-circuit wall-mounted gas heating boilers, including economical condensing boilers.

The most attractive in price

Wall-mounted gas heating boilers domestic production recognized as the most affordable in the line of functional models. Among Russian manufacturers, the leader is EPO Signal, whose assortment includes 4 modifications of double-circuit devices of the Angels series. Angels boilers are equipped with a burner with electronic ignition and an automatic ionization-type flame control system.

In the middle price range are Korean wall-mounted gas heating boilers of the Navien brand, represented by groups of high-quality double-circuit devices with a separate and coaxial smoke removal system, operating uninterruptedly under conditions of low and varying gas and water pressure.

Wall model NAVIEN DELUXE

Daewoo is another Korean giant that supplies the market with inexpensive atmospheric models and economical boilers with a closed combustion chamber. For ease of control, the devices are supplemented with remote controls and liquid crystal indicators.

The assessment of a group of consumers may not always coincide with personal opinion, so we recommend considering not only the models that received the most votes, but also other devices from well-known manufacturers, as well as new products that have not managed to win the trust of customers. In order not to make a mistake with the choice of durable equipment, it makes sense to seek help from a specialist who will take into account the needs of the family and real possibilities existing system heating.

Video: how to choose a gas boiler

You have installed a gas pipeline to your country cottage or... The next stage is the selection of gas heating equipment. The task is not easy - the variety of household boilers in online stores will bewilder any inexperienced homeowner. Accordingly, our goal is to consider existing types units and explain how to choose the right gas boiler for heating a private house, cottage or apartment.

What you need to know to select a heater

You can’t just go to the store and buy a gas heating boiler. To choose suitable model, you need to prepare a list of requirements for the unit - determine the thermal power, necessary functions, installation method and other initial data.

What items are included in the list:

1. Calculate the amount of heat required to heat a cottage or apartment.
2. Outline the range of tasks for a gas boiler - it should only heat the building or, in addition, serve as a water heater for household needs.
3. Set aside a space for installing a heat generator. The rules allow the installation of gas-fired heating equipment in the kitchen (power up to 60 kW), attached boiler room, or in another separate room located near the outer wall of the home.
4. Determine the method of installing the boiler - floor or wall. For apartments, only the hanging option is suitable.
5. Consider the operating principle of your heating system. For a gravitational circuit with natural circulation of coolant (so-called gravity flow), an appropriate energy-independent heater that operates without electricity is selected.
6. Set the level of automation of the device according to your wishes. Examples of useful functions: maintaining indoor temperature according to a schedule or signals from an external weather sensor, remote control via the Internet, and so on.
7. Estimate the prices of various boilers and find out how much you are willing to spend on purchasing a gas boiler.

Note. The rules for the placement and connection of gas-using installations intended for heating and hot water supply are set out in the publication about.

Before choosing a new one or replacing an outdated gas boiler for heating a private home, we highly recommend consulting the customer service department of Gorgaz (or another management company). Why is this needed:

• besides general rules, regional offices have internal instructions that limit the use of gas equipment, these points are worth clarifying;
• a new or replaced boiler must be included in the project documentation, otherwise you risk incurring a fine for installation without approval;
• Our specialists will help you place the heat generator correctly in your home.

Clarification regarding internal instructions. Gorgaz often introduce their own restrictions, for example, they may prohibit the installation of an atmospheric boiler next to a forced kitchen hood. The reason is the absence.

Another example: you want to remove a horizontal (coaxial) chimney from a room in an apartment building, but the office does not approve this decision, since a protruding pipe spoils the appearance of the facade. To understand all the subtleties, you will have to understand existing varieties gas heaters, but first...

Determining the thermal power of the boiler

Surely you know the popular methods for calculating the thermal performance of equipment - by area or volume of heated premises. Allegedly, for housing 100 square meters take a 10 kW boiler, in Vacation home 200 sq. m – unit 20 kW.

It is better not to use these approximate methods, since specific conditions are not taken into account - the climate in the area of ​​residence, the degree of thermal insulation of the building, and so on. We suggest using more accurate calculation methods:

1. According to the specific heat load per square square of living space, taking into account the location of the room and the number of window openings.
2. The same goes for the volume of premises.
3. Full calculation using the SNiP formula, taking into account the thickness and thermal insulation of external building structures.

Comment. All 3 methods are described in detail in a separate manual on thermal calculations.

Knowing the heat consumption for heating the cottage, we select a gas boiler based on power as follows:

• if you plan to use the unit only for heating, multiply the resulting figure by a safety factor of 1.2;
• the power of a 2-circuit heat generator providing 2 water points is best selected with a margin of 1.3-1.5;
• to work with an indirect heating boiler with a volume of 200-300 liters, you will need a gas single-circuit boiler with one and a half capacity reserve (multiply by a factor of 1.5).

Let's give an example. For heating a private home with an area of ​​100 square meters. m is calculated to require 9 kW of energy. The minimum power of a gas heater excluding DHW will be 9 x 1.2 = 10.8 kW, a double-circuit boiler - 9 x 1.3 = 11.7 kW. If you need to heat the storage tank, the unit’s performance increases to 9 x 1.5 = 13.5 kW. Next, we select the nearest higher-power model from the line of heaters - 12 and 15 kW, respectively.

Classification of gas heat generators

All hot water boilers that burn natural gas or liquefied propane-butane mixture (LPG) are divided into groups according to the following criteria:

• combustion chamber design - open or sealed (closed);
• installation method – wall, parapet or floor;
• number of heating circuits – 1 or 2 (heating + DHW);
• energy resources used – only gas fuel or its combination with wood and electricity (so-called combi boilers).

Note. All types of heat generators are initially configured to burn methane, the main gas. To do this, it is enough to replace the fuel jets and adjust the pressure in front of the main burner.

The correct choice of a gas boiler is made according to 3 main criteria - the principle of operation (that is, the type of chamber), the installation option and the ability to additionally heat required quantity water. Other factors are not as important, but certain conditions can play a decisive role:

• design and material of the heat exchanger – steel, cast iron, copper;
• ignition method - automatic electronic or manual from a piezoelectric element;
• dependence of the heater operation on electricity;
• the ability to smoothly or stepwise regulate the power of a gas burner device (modulation);
• and so on.

An important nuance. Absolutely all modifications of commercially available gas water heating devices are equipped with automatic safety systems. According to the requirements of regulatory documents, the fuel valve of any boiler must immediately stop the fuel supply in 3 cases:

1. In case of spontaneous extinguishing of the burner, for example, due to the flame being torn off by reverse draft.
2. If the gas pressure in the supply line drops below a critical level.
3. In the absence of natural chimney draft or failure of the blower fan (optionally, a smoke exhauster) in turbocharged versions of heaters.

Reference. In heat generators with electronic control, manufacturers provide additional levels of protection - they install temperature sensors, overheating sensors and other automatic safety devices.

The division of gas heating installations into groups cannot be called clear. Example: devices with an open chamber are floor-mounted, wall-mounted and parapet-mounted, and some models operate from the mains, others are completely independent. Let's look at each group in more detail.

Differences between units based on operating principle

Boilers using natural gas as the main energy source are divided into 3 categories:

• atmospheric with an open combustion chamber;
• turbocharged (otherwise inflatable) with a closed firebox;
• condensing - units with a sealed chamber capable of returning the latent heat of fuel combustion.

We will not consider the pros and cons of each group of heaters; we would rather list the design differences and operational parameters. In heat sources of the first category, the firebox communicates with the surrounding air, hence the name - atmospheric. Boiler features:

Explanation. Only units with an open firebox are able to function without electricity. In non-volatile models, fuel supply and safe combustion are handled (most often by EuroSIT). There is no electronic board or controller; ignition is done manually using a piezo button.

Turbocharged heat generators do not depend on chimney draft, since air is forced into a closed chamber by an electric fan, whose performance is regulated by a controller. Air is sucked in and exhaust gases are released through a coaxial chimney “pipe in pipe”, laid out along the shortest path, as shown in the photo.

Typically, a double-walled flue is installed horizontally with a slight slope towards the street to drain condensate.

Features and characteristics of pressurized boilers:

1. The firebox does not communicate with the air in the room; the ignition and combustion process are completely controlled by electronics.
2. The units are equipped with two-stage burners or modulating devices with a smooth change in productivity.
3. The efficiency of various turbocharged vehicles lies in the range of 90...93% - a higher figure than that of naturally aspirated vehicles.
4. Boilers require external power supply from the house electrical network.

Compared to atmospheric “brothers” gas sources Heats with a closed chamber are more economical and well automated. The disadvantage is complete dependence on external power supply, the lights were turned off - the heating also “died”. To secure a gas turbo boiler, you need a block uninterruptible power supply or an electric generator.

Reference. In terms of price, forced-air heaters occupy a middle position between inexpensive “aspirated” and condensing units.

The design of the condensation heat generator resembles turbocharged models - the same closed chamber, fan - air blower (or smoke exhauster), double-walled chimney. The device differs in the design of the firebox and burner cylindrical, placed inside a heat exchanger - a stainless steel coil.

How the boiler works:

In addition to dependence on electricity, the described boilers have 2 more disadvantages - too high a price and deterioration in efficiency in certain operating modes. Our expert will reveal the essence of the problem in a video:

Wall, stationary and parapet models

As you might guess, the boilers of the first group are hung on the wall, the second are placed on the floor. Parapet heaters are closer in design to floor heaters, only they are attached to the wall at a level of 70-100 cm.

The installation method is not the only difference between heating units:

1. All wall-mounted modifications are a miniature gas boiler room. Inside any hanging boiler there is its own circulation pump, safety group, control unit and expansion tank (except for individual copies). Therefore, a wall-mounted device always depends on the reliability of the power supply.
2. Heat exchangers for suspended heaters are made of copper or steel; cast iron is not used. The equipment is offered in 3 versions to choose from - turbocharged, atmospheric and condensing.
3. Floor-standing boilers are equipped with heat exchangers made of steel and cast iron. In Russia and the CIS countries, affordable energy-independent devices of the AOGV type are produced; among the imported ones there are models with external power supply.
4. 90% of stationary boilers are equipped with an open chamber and connected to a conventional chimney. There are also supercharged and condensation modifications of units (usually foreign-made).
5. Parapet heaters are offered only in atmospheric non-volatile design. The maximum power of a gas wall-mounted boiler is small - up to 15 kW, efficiency - 86%. Heat exchanger – “black” steel.

Note. The difference between the three boiler layouts, as well as the advantages and disadvantages of each option, in a detailed review.

From the point of view of the average user, the material of the heat exchanger does not play a big role. Copper radiators are effective, but expensive; cast iron is durable, but too heavy and fragile (afraid of sudden temperature changes). Stainless steel and “black” steel are a compromise option sold by manufacturers in various boilers, regardless of layout.

Types of double-circuit water heating devices

The main difference between these boilers and single-circuit versions is the ability to provide hot water to the home. The water is heated by the main burner in 4 different ways:

Bithermic and plate heat exchangers are installed on double-circuit wall-mounted boilers; they are rarely used in floor-standing versions. Only stationary units are equipped with storage boilers (with rare exceptions). Ordinary coils from copper tube used in energy-independent heaters - parapet and floor.

Security features and other useful features

Boilers that do not require connection to the house electrical network, equipped with mechanical gas automatics, which fulfills the minimum safety requirements and turns off the fuel supply in the event of an emergency (listed above). What is important: after the mechanical valve of the EuroSIT type is triggered, the user must restart manually.

In heat generators with automatic ignition and electronic control, the system works differently:

1. In any emergency (the gas is turned off, the draft is lost, the flame goes out), the valve shuts off the fuel.
2. After a few seconds, the controller commands the valve to open the gas, and the ignition module to send a spark to the electrodes. That is, the boiler tends to start on its own, maximum number attempts – 4.
3. If after 3-4 ignitions the accident repeats, the unit goes into error - it turns on the red indicator or shows a code on the display. Further intervention by the homeowner or service technician is required.

Addition. The heater behaves in a similar way if the power supply fails. When the light turns on, the control unit makes 3-4 attempts to start. How this happens when the ionization sensor is contaminated with soot, watch the video:

We list other useful functions of modern boilers:

• shutdown if the coolant pressure in a closed heating system drops to 0.3-0.5 Bar (measured by a hydraulic sensor);
• water overheating thermostats in both circuits (heating and DHW) also turn off the boiler burner;
• built-in three-way valve and additional pipes for connecting an external indirect heating boiler;
• the ability to connect a room thermostat, external weather sensor and remote control;
• defrost protection – the temperature sensor will start the boiler if the coolant cools to a critical threshold of +5 °C;
• fitting with valve;
• modulation of the flame of a gas burner device - automatic smooth regulation of combustion intensity depending on the temperature of the supply water.

Electronic control units are capable of diagnosing emerging problems and sending the appropriate signal. If the malfunction threatens safety, the red light on the boiler lights up and the burner turns off; in other cases, the yellow indicator lights up instead of the green one. On models equipped with a display, the error code specified in the operating instructions is displayed.

So, you have determined the power of the heat source, the location of the installation mode and understood the existing types of gas heaters. All that remains is to choose the best option.

The first recommendation. According to our experts, the optimal solution for all occasions is a wall-mounted turbo boiler with a coaxial flue. In terms of the cost of the equipment, including installation, the device will be cheaper than buying an “aspirated” one and building a full-fledged chimney. One condition: no problems with power supply.

Now let’s figure out which gas boiler you should choose depending on your budget and operating conditions:

1. For a gravity (gravity) water heating system, you must definitely choose a non-volatile heater option - floor or parapet. The latter is suitable for a small country house area 80...120 m².
2. For a closed type system (the wiring diagram does not matter) any heater from the above is suitable. But it’s better to take the wall-mounted option - it’s easier and cheaper to connect the product, you don’t have to buy a safety valve, pump and expansion tank.

   Connecting a wall-mounted unit with water heating and a hot water system is quite simple, the piping elements and optional equipment included in the boiler itself

3. Typical conditions: the smoke duct has already been built, the building has a separate combustion room, the budget is limited. Solution: wall-mounted atmospheric mini-boiler room with a minimum set of functions.
4. It is also better to install a turbocharged one in an apartment in a multi-storey building. hanging model, since the removal of combustion products into ventilation ducts is strictly prohibited. Make a hole in external wall and lay a horizontal chimney to the street, maintaining distances from the windows.
5. A dual-circuit heater correctly selected in terms of power will serve a maximum of 2 water points. This refers to products with plate and bithermic heat exchangers; outdated copper coils are ineffective.
6. If the expected consumption of household water is high, you need to purchase a gas water heater or a boiler plus a storage boiler. If you don’t want to bother with the piping, take the Protherm floor-standing unit of the Medved-KLZ series with a built-in capacity of 90 liters.
   
7. Floor-standing models should be purchased as a last resort, when wall-mounted models cannot be chosen - you need more power, independence from electricity, and similar situations. Stationary gas boilers are more expensive and require additional piping.

Finally, about condensing heating equipment. Now these units are not cheap, the price is not comparable with the increase in efficiency (95% versus 93% for turbocharged devices). Second negative point: the more complex the boiler installation, the more expensive its maintenance and repair. Although it must be admitted that a condensing gas boiler is The best decision for low-temperature heating systems - heated floors.

Since gas in Russia costs an order of magnitude lower than electricity, many owners of private houses are turning to installing gas boilers. However, economic parameters are far from the only advantage of units of this type over others - they include high thermal power, an optimal level of efficiency, a minimum amount of harmful emissions, as well as the ability to heat large areas (on average from 150 to 300 square meters).

Of course, like any other equipment, gas boilers have disadvantages. These include strict coordination of the installation with the federal Gaztekhnadzor service, equipping the house with a chimney to remove (a small amount) of combustion products, as well as the introduction of automation to detect gas leaks.

In our rating you will find 15 of the best and highest quality gas boilers, which can be purchased at long years will provide you with heat and hot water. Before this, we advise you to study some of the nuances of choosing a gas boiler for a house or apartment.

The right choice - double-circuit or single-circuit?

As you know, according to the number of circuits, gas boilers are usually divided into single-circuit and double-circuit. Which one is better? The correct choice depends on the main purpose of the device.

Single-circuit ones are designed exclusively for the operation of the main coolant (radiators, pipes, etc.), that is, they are purchased to provide heating. Most often, such devices are installed in dachas and in places where there is no water supply. In this case, a boiler is purchased for a single-circuit boiler to heat water in an autonomous water supply system.

Double-circuit boilers are 2-in-1 devices. They can both heat a house and provide hot water supply. The coolant and boiler in such a device are assembled into one unit. If hot water is not consumed, the coolant circulates in the heating circuit. As soon as the user opens the hot water tap, the system switches the valves so that the coolant is directed to the second circuit. This is the most popular type of gas boilers, which are installed in most apartments and private houses.

Heating power

The more powerful the boiler, the higher its cost. In order not to overpay extra money and eliminate additional expenses in the future (the more powerful the boiler, the more resources it consumes), it is important to calculate what power gas boiler you need. An approximate calculation is as follows: per 10 sq. m of a well-insulated room (ceiling height up to 3 m) should account for 1 kW of boiler thermal power. For a poorly insulated room, another 30–50% is added to the thermal power indicator.

For a country house of 50 sq. m. it is enough to purchase a gas boiler with a capacity of 7 - 12 kW. But for a house with an area of ​​200 square meters. m. you will already need a more powerful device: 23 - 25 kW. Most modern double-circuit gas boilers produce a thermal output of 24 kW.

When choosing boiler power, there is one more important detail. If you take a device that is too powerful for small room(for example, a 24 kW boiler for a one-room apartment of 40 sq. m.), then the boiler will quickly heat the coolant and turn off. As soon as the water cools down, the boiler will start again. Constantly turning on and off will occur very often, which will lead to accelerated wear and increased gas costs. In turn, a boiler with less power will ensure smooth combustion, and switching on and off will occur much less frequently.

Which company should you prefer?

The highest quality and most reliable gas boilers are produced by Italian, German and South Korean companies. Even taking into account the fact that many companies locate their production in China, purchasing a gas boiler from a popular brand is better than purchasing a little-known device.

To make your choice easier, we list the best manufacturers of gas boilers:

• Navien (South Korea)
• Bosch (Germany)
• Ariston (Italy)
• Baxi (Italy)
• Buderus (Germany)
• Vaillant (Germany)
• Protherm (Slovakia)
• Viessmann (Germany)
• Kiturami (South Korea)

Voltage stabilizer for a gas boiler - is it necessary or not?

After purchasing a gas boiler, it is advisable to install a voltage stabilizer. Especially if your network suffers from frequent voltage surges. The fact is that if the boiler fails due to a power surge, it will not be possible to exchange the device under warranty. The requirement for network quality is specified in each warranty agreement. Therefore, it is better to spend an extra 3–5 thousand rubles for a device with a power of up to 1 kW (and you don’t need a powerful stabilizer for the boiler) than to lose tens of thousands of rubles in the end.

The best inexpensive wall-mounted gas boilers

The main advantages of wall-mounted gas boilers are lower price and compact placement. They are more preferable for rooms with limited space. For example, for an apartment. The disadvantages of wall-mounted models are lower power and shorter service life, in contrast to floor-standing devices.

3 Navien DELUXE 24K

Best ergonomics at an affordable price
Country: South Korea
Average price: 29,800 rub.
Rating (2019): 4.5

Gas boiler Navien DELUXE 24K is maximum comfort when minimum costs. A double-circuit thermal energy generator is used for sequential heating of rooms with a total area of ​​up to 240 sq.m and to satisfy domestic and economic needs for hot water with a capacity of up to 13.8 l/min at a temperature of 35 °C. Distinctive feature heating device in the primary heat exchanger material is stainless steel. This fact slightly reduces the efficiency of the unit to 90.5%, but extends its durability due to the reliability of high-alloy steel.

Comfortable use of the water heating installation is ensured by a convenient display and clear control and measuring instruments, an adapted room regulator with a remote control. The ease with which prompt intervention in the cyclic operation of the boiler is carried out allows us to significantly reduce the consumption of blue fuel during operation.

The reviews note the stable operation of the electronic circuit in conditions of periodic voltage fluctuations in the supply network, amounting to +/-30% of 230 V. The uninterrupted functionality is determined by the presence of the SMPS (Switched-Mode Power Supply) protective chip, which complements the microprocessor. The combustion process in a closed chamber takes place without harmful failures or stops, which has a positive effect on the service life of the equipment, excluding breakdowns.

2 Baxi MAIN 5 24 F

Best quality
Country: Italy
Average price: RUB 37,820.
Rating (2019): 4.5

The Baxi MAIN 5 24 F gas boiler is an example of a double-circuit unit in the line of biothermal heating devices. An engineering solution that combined the heating circuit with the preparation of water for hot water supply in a single water supply unit made it possible to significantly reduce the cost of a wall-mounted unit compared to heat generators equipped with separate heat exchangers. However, there was no significant decrease in performance indicators. The boiler's power is sufficient to heat an area of ​​240 sq.m and prepare 9.8 l/min of hot water at 35°C.

The heat generator is designed to operate on natural and liquefied gas with a wide range of pressure in fuel pipelines. When connected to centralized gasification lines, the coverage ranges from 13 to 20 mbar. A high pressure threshold of 37 mbar is allowed when powered from mobile and stationary gas tanks. This indicator indicates the high reliability of the boiler’s fuel equipment.

Customer reviews emphasize that popular options for a gas unit are the ability to connect external controls: room regulators, weekly programmers, and the provision for pairing with low-temperature heating circuits (warm floors).

Video review

Which heating boiler is better? Table of advantages and disadvantages of four types of boilers: gas convection, gas condensing, solid fuel and electric.

1 Vaillant turboTEC pro VUW 242/5-3

High efficiency with maximum reliability
Country: Germany
Average price: 53,700 rub.
Rating (2019): 4.5

The leading line in the rating is occupied by not the cheapest in the category, but the most reliable and efficient gas boiler Vaillant turboTEC pro VUW 242/5-3. The skill of German manufacturers knows no bounds: over more than ten years of production, this model has received mostly laudatory reviews regarding various aspects of its design and operation.

A double-circuit boiler can be used not only as a heater: when a source of cold water is connected to it, it copes with the functions of a boiler no less brilliantly. The maximum temperature of the DHW circuit is 65 degrees Celsius - for home use this is more than optimal. 24 kW of power is enough for heating residential areas up to 240 square meters. In this mode, Vaillant turboTEC pro VUW 242/5-3 shows the most high value Efficiency is about 91%. It is also worth noting the presence of six levels of protection, electronic control with the ability to modulate the flame, as well as a six-liter (generally standard) expansion tank.

The main disadvantages of the model affect the purely marketing side of the manufacturing company. Price service Vaillant boilers are very high, and the owner will bear the costs both for the purchase of a branded part and for its subsequent installation (approximately 50/50). Fortunately, serious breakdowns of units occur extremely rarely.

The best gas boilers with floor installation from the budget category

Floor-standing gas boilers are considered more reliable and durable. They cost more than wall-mounted models, but they are superior in power and can heat rooms from 200 square meters. m. To install floor-standing boilers, it is recommended to use a separate room (boiler room).

3 Protherm Wolf 16 KSO

The best automation. Developed service network
Country: Slovakia
Average price: 21,200 rub.
Rating (2019): 4.5

The non-volatile floor stand, presented by the Slovak company Proterm, is distinguished by its surprisingly miniature dimensions. Measuring just 39 cm wide, almost 75 cm high and 46 cm deep, it can easily be installed in any small space. The “Wolf” series includes 2 modifications, differing only in thermal power of 12.5 and 16 kW, sufficient for heating a private house with an area of ​​30 to 150 square meters. m.

The fact that the main production site Protherm is located in the world famous Vaillant plant German manufacturer gas boilers. Floor-standing units are made of 3 mm thick steel, equipped with temperature and emergency controllers, a draft stabilizer, as well as a SIT gas burner device (Italy). The design is easy to install and operate, and therefore does not cause any complaints from users. However, you need to take into account that the 2-year warranty on the unit applies subject to installation by a certified specialist.

2 ATON Atmo 30E

The most powerful gas boiler (30 kW)
Country Ukraine
Average price: 27,800 rub.
Rating (2019): 4.0

A powerful single-circuit boiler of Ukrainian origin, which has everything necessary to ensure stable heating of rooms up to 300 square meters. Actually, ATON Atmo 30E fulfills its main task beyond all praise - the absence of a second circuit for heating water allowed Ukrainian craftsmen to devote more attention and resources to improving and fine-tuning the heating function.

For normal operation, the boiler requires 3.3 cubic meters of gas per hour. This is quite a lot (especially for a budget model), but almost all the energy from the combustion of natural fuel (the efficiency of the unit is 90%) is converted into thermal energy, which, in combination with 30 kW of power, results in such a vast heated area.

In general, the presence of the principle of economy is felt in the model: the designer cut off almost all “civilized” functions, leaving the boiler with only the most necessary things - a thermometer, gas control and an overheating protection thermostat. This step led to a noticeable increase in the level of reliability, since a smaller number of components leads to a smaller number of possible (elementary) failures. Overall, ATON Atmo 30E is an ideal boiler for large country house, not burdened with additional functions and the need to work as a boiler.

1 Lemax Premium-25B

Largest heating area at an affordable price
Country Russia
Average price: RUB 27,360.
Rating (2019): 4.5

Lemax Premium-25B is an inexpensive floor-standing convection-type gas boiler. Produced in Taganrog. Capable of efficiently heating a house up to 250 square meters. m. with an efficiency of 90%. The low price of the device is due to the steel structure of the heat exchanger. This material is more susceptible to corrosion than copper and cast iron heat exchangers. However, the developer has provided a special thermal insulation coating with inhibitors, which should significantly reduce heat exchanger corrosion.

The boiler is equipped with everything necessary for safe operation of the system: heat exchanger overheating sensor, thermometer, gas control. There is an automatic ignition - ignition is carried out automatically. This indicates higher reliability and efficiency compared to devices with piezo ignition. The nominal pressure of natural gas is 13 mbar, that is, the boiler will operate at full power even at low pressure levels in the gas network (which is not uncommon in Russia). This best indicator in our review of budget floor-standing boilers.

It is worth noting that the Lemax boiler is intended for open system heating, therefore, when purchasing it, the house must have a chimney to remove combustion products.

Most user reviews speak of Lemax’s “indestructibility” and almost silent operation. This is an economical and trouble-free boiler at an affordable price, with a 3-year manufacturer's warranty. One of the best offers in the budget segment.

The best floor-standing gas boilers: price - quality

Here we present the most optimal price-quality ratio of floor-standing gas boilers. The most popular units among buyers.

3 Buderus Logano G124 WS-32

Increased efficiency. Large range of additional equipment
Country: Germany
Average price: 102,000 rub.
Rating (2019): 4.5

The Logano line includes 4 standard sizes (from 20 to 32 kW) of low-temperature boilers, which are considered more profitable and safer than high-temperature ones. In addition, low temperatures in the heating system create maximum comfortable conditions for a person, while strong temperature changes in an apartment or private cottage are excluded. The unit can be integrated into the heating system using heated floors, and if the heat loss in the house is too great, it is possible to supplement it with radiators.

Additional heat savings are facilitated by the special design of the cast iron heat exchanger and 80 mm thick thermal insulation. So that buyers can individually configure a heating device, the company offers a wide selection of additional parts and assemblies, which, it must be said, are very expensive. For example, they offer to buy the AW 50.2-Kombi flue gas monitoring system for almost 9.5 thousand rubles, and for the Logalux SU floor-mounted water heater tank you will have to pay at least 50 thousand rubles. Nevertheless, consumers are satisfied with the efficiency, ease of operation and durability of the model and recommend it for purchase.

2 Navien GA 23KN

Stability and safety of operation. 3 year warranty
Country: South Korea
Average price: 34,000 rub.
Rating (2019): 5.0

In June last year, Navien Rus LLC was awarded the “Company of the Year” award in the “Best Supplier of Engineering Equipment” category. A month later, the company celebrated the sale of its millionth mounted boiler in Russia with a 3-day conference. In addition, over the past 4 years, the brand has gained 46.6% of votes and has repeatedly confirmed the title of “Brand No. 1” in the “Heating Boilers” category. What is remarkable about his products that people vote for them not only with their words, but also with their wallets?

First of all, buyers are attracted by the quite reasonable price for the unit, the appearance of which speaks of the unsurpassed quality characteristic of South Korean technology. They are not disappointed even after getting acquainted with the technical characteristics, in particular, the presence of a 2nd circuit, closed chamber combustion and electronic control system with remote control included. Despite its “overseas” origin, the model is fully adapted to Russian operating conditions and is designed to operate at a minimum gas and water supply pressure of 4 mbar and 0.1 bar, respectively.

1 Baxi SLIM 2.300 Fi

Best functionality and quality
Country: Italy
Average price: RUB 131,838
Rating (2019): 5.0

If you are looking for a high-quality and modern gas boiler from a trusted manufacturer, then Baxi SLIM 2.300 Fi is one of the best options. This is the most expensive device in our review, with a price tag of about $2,000, which is quite acceptable for those who do not like to skimp on quality.

The double-circuit “Baxi” is capable of heating a cottage with an area of ​​up to 300 square meters. m. with an efficiency rate of 90%. Can operate in a closed heating system due to the built-in circulation pump. The built-in expansion tank will maintain optimal pressure in the heating system, accepting excess heating and replenishing losses when cooling the coolant. Baxi SLIM 2.300 Fi is one of the best boilers for underfloor heating.

The primary heat exchanger material here is the best - cast iron. As you know, cast iron is resistant to corrosion, durable and reliable. Additional features worth noting are an air vent, a safety valve and protection against pump blocking.

Baxi SLIM 2.300 Fi is one of the best-selling floor-standing gas boilers in the middle and high price segment.

The best wall-mounted gas boilers based on the condensing principle of operation

During operation of a gas boiler, condensate is formed, which can be used to generate thermal energy. This is what happens in boilers of the condensing operating principle, where additional energy from the condensate is generated using a special heat exchanger (economizer). This undoubtedly increases the efficiency of the device.

Installing a condensing boiler allows you to save up to 20% on gas costs. Thus, the efficiency of a conventional convection boiler is on average 92%, while a condensing boiler is capable of operating with an efficiency of 109%. True, purchasing a condensing model will be much more expensive than a convection model and, perhaps, such a decision will be justified when heating sufficient areas.

3 Baxi POWER HT 1.450

Optimal performance and safety
Country: Italy
Average price: 147,000 rub.
Rating (2019): 4.7

Distinctive characteristics of the model are high power levels of 45 kW, efficiency of 107.5% and the ability to maintain 100% power when the input pressure is reduced to 5 mbar. The device implements everything modern methods protection, including protection against freezing, overheating, as well as gas control and an autodiagnostic system. The built-in microprocessor constantly monitors the status of the sensors and in the event of emergency situations (for example, a drop in water pressure, overheating or gas supply shutdown) automatically turns off the boiler. It is also worth noting the presence of automatic ignition, an air vent and the ability to connect a heated floor.

Baxi POWER HT 1.450 is one of the most reliable premium floor-standing boilers. The only obvious disadvantage of the device is its high price.

2 Baxi Duo-tec Compact 1.24

Profitable price. Minimum liquefied gas consumption
Country: Italy
Average price: 52,500 rub.
Rating (2019): 4.7

Baxi Duo-tec Compact 1.24 is one of the most affordable condensing-type gas boilers. Despite low price, the device power is 24 kW with an efficiency of 105.7%. This is an excellent model for installation in a country cottage or country house, since the boiler can operate on liquefied gas with a minimum flow rate of 1.92 kg/h. If desired, Baxi Duo-tec Compact 1.24 can be connected to the heated floor system. The built-in expansion tank will compensate for the expansion of the coolant. The Duo-tec Compact series features easy installation, simple operation and the ability to adapt to gas quality. They operate with a power modulation ratio of 1:7.

It is a pity that the boiler is single-circuit and can only be used for the heating system.

1 Protherm Lynx condensation

Combination high power and compactness. Auto control
Country: Slovakia
Average price: 57,000 rub.
Rating (2019): 4.8

In Europe, traditional boilers are practically not used - they have been replaced by condensing units like the Protherm “Lynx”. Models of this line have been produced since 2002 and still remain in demand on the market. There are quite a few reasons for its popularity: affordability – wall-hung condensing boilers with similar characteristics from competitors are 1.5 times more expensive, rich equipment, and a design that is still relevant today.

The forced exhaust system of combustion products allows the device to be installed in rooms without a chimney. Fuel consumption is 3.2 cubic meters. m./hour and provides savings of about 20–30% compared to convection devices. Thanks to two preset modes and an automatic control system with an electronic display, setting the desired temperature in a private home is not difficult. Additionally, the developers have provided the ability to connect an external controller. Users do not complain about any breakdowns, which allows us to judge the high reliability of the Lynx.

The best double-circuit boilers

When choosing a double-circuit boiler, as well as a single-circuit boiler, you need to pay special attention to power. If the residents of the house plan to take a bath frequently, the minimum power of the equipment should be at least 18 kW; if a shower is a priority, then it is permissible to install a less powerful unit - from 10 kW. Even before purchasing, it is advisable to check whether the manufacturer has not skimped on the circulation pump, safety valve, membrane expansion tank and fittings included.

3 Bosch Gaz 6000 W WBN 6000-18 C

Patented heat exchanger design. Low noise level
A country: Germany (produced in Russia)
Average price: RUB 29,100.
Rating (2019): 4.5

Preparing hot water usually takes a long time. If you do not want to put up with such an inconvenience, take a closer look at the Bosch Gaz 6000 W WBN 6000-18 C boiler. Its plate heat exchanger is designed in such a way that water is heated in a matter of seconds. The presence of two separate heat exchangers makes the boiler more productive (30° - 8.6 l/min, 50° - 5.1 l/min) and not demanding on water quality.

Among other advantages of heating equipment, it should be noted that there is minimal noise - many users compare the sound of a working boiler to the noise of a computer or refrigerator. Economy is another Bosch feature. It is proposed to ensure this by turning on the “Eco” mode, which provides for heating water only when it is withdrawn. If the most flexible automatic adjustment is required, it is possible to connect external regulators to the built-in automation, allowing you to control the system remotely.

2 Ariston CARES X 15 FF NG

Fine temperature adjustment. Sophisticated security system
Country: Italy
Average price: 35,500 rub.
Rating (2019): 4.7

The Ariston CARES series is the most compact gas boilers in a traditional design and with a wall mounting method. The 15-kilowatt unit is intended for installation in heating systems of small private houses, cottages and apartments, in the limited space of which its dimensions - 400x700x319 mm - fit in quite well. And it’s very helpful that the unit’s settings allow you to set the temperature of the heating circuit with an accuracy of 1°, thereby ensuring an ideal microclimate in a small room.

The design is assembled according to a modular principle, due to which the quantity threaded connections– points of potential leaks – has become minimal. Built-in protective systems such as gas control, anti-freeze mode, and safety valve are responsible for uninterrupted operation and increased safety of the device. And at the same time, the manufacturer provides all the necessary options for comfortable operation - a large electronic display, auto-ignition, status indication and the ability to connect external control. Of course, this unit deserves a place in our rating!

1 Rinnai RB-207RMF

The best digital technologies. 18 Japanese patents
Country: Japan
Average price: 52,800 rub.
Rating (2019): 4.9

It’s not for nothing that the Japanese are known as techno-freaks – they even managed to stuff the Rinnai RB-207RMF gas boiler with the most modern electronics. What makes it unique, first of all, is the algorithm for automatically maintaining the optimal ratio of the gas-air mixture in the working chamber. The process is controlled by a “brain” with touch sensors. This achieves an unprecedentedly wide range of output power - from 17 to 100% and, as a result, a reduction in gas consumption and an increase in the service life of the primary heat exchanger.

The model can be controlled from the “Standard” modification remote control (supplied in basic set), Deluxe or Wi-Fi. With its help, you can program an individual heating and hot water supply mode, which will be maintained automatically depending on the indicators of sensors outside and inside the building. Changes in settings are duplicated by the voice navigator. Two microprocessors are responsible for safety, monitoring and correcting each other’s work. This is not a boiler, but a space rocket, no less!