What power are gas boilers. Gas boilers for heating a private house: how to choose a functional and powerful unit What are the types of gas boilers

Article last updated date: 01/11/2019

For heating private houses, it is most advantageous to use gas heating equipment. This is due to the fact that gas is still considered the cheapest type of fuel. Such equipment is safe, economical and efficient.

We present to your attention the rating of gas boilers, compiled on the basis of feedback from consumers and specialists. If you decide to install gas heating in your house, then the overview of the devices below will help you navigate the variety of gas-fired boilers.

Gas boilers are divided into two types.

convection

The most common among boilers. The principle of its operation is quite simple. Gas through the burner nozzles enters the combustion chamber, where the flame flares up. It heats the heat exchanger with water, which enters the radiators through pipes and heats the room. As soon as the water temperature has reached the required temperature, the heating stops. The products of combustion are removed through the chimney. The efficiency of such a boiler is 90%. The remaining ten literally fly out into the pipe.

If the outlet temperature is below 57 degrees, then condensation will form on the walls of the combustion chamber, heat exchanger and chimney, which can lead to breakdowns, soot formation, and also to a reduction in the life of the device.

To prevent this from happening, as well as for more efficient use of thermal energy, a new type of boiler was designed.

Condensing

The efficiency of this device reaches almost 100% due to the fact that the energy is fully used for heating and no longer “flies into the pipe”. This was achieved with the help of another heat exchanger - a water economizer. It is there that carbon monoxide vapors cool down until condensate forms, which accumulates in a separate tank. When the vapor is converted into a liquid, useful thermal energy is released, which is transferred to the coolant.

The condensing boiler is bulkier and is usually installed in a separate room. The cost of the device is twice as much as that of traditional boilers.

Popular brands

Demand creates supply, which is probably why the market for gas heating equipment is so large. The more manufacturers, the more new models appear in stores. For an inexperienced user, this is a difficult choice, especially since few people are familiar with well-known brands. Still, this is a piece goods, I bought it once and forgot for a long time.

Which manufacturer's products should be considered reliable and of high quality?

• wolf. The German company produces boilers with very high efficiency. It is not yet very well known in the CIS, but it deserves the closest attention. Even budget models are of good quality and have built-in automation to ensure the most efficient operation.
• Vaillant. Also a German manufacturer. The products of this brand occupy more than twenty-five percent among other companies in the European market, which indicates quality, reliability and popularity.
• Bosch. This brand does not need advertising, it has long been a recognized leader in the production of equipment.
• STS and Bentone. Swiss companies. They have expensive products, but very high quality.
• Ariston, Beretta, Lamborgini and Ferroli. The Italians have firmly occupied the middle price segment. Their products are good value for money.
• Dakon. The Czech manufacturer produces budget models. It uses German high-quality components, modern automation systems, as well as careful quality control.

Just do not think that Russian companies do not produce quality products. By purchasing equipment of domestic manufacturers, the user can count on low cost, reliability and durability, high performance, as well as the availability of components and good after-sales service.

• "Zhukovsky Machine-Building Plant". Produces heating equipment for over 40 years. In some boilers it uses imported automation. None of the models is independent of the mains. Efficiency - up to 92%. High degree of reliability and long service life.
• Borinsky. This plant has been dealing with boilers for more than two decades. Almost all models are equipped with high-quality foreign automation, are non-volatile, have a relatively modern design and affordable price.
• Lemax. The Taganrog plant offers gas boilers with a special coating of heat exchangers that protects against corrosion. Models are also produced with cast-iron heat exchangers, which are rightfully considered the most reliable. All equipment has high efficiency and is non-volatile.

Rating of gas boilers - an overview of the best appliances

To choose the best gas boiler for heating a private house, we recommend that you carefully read the most popular models among domestic consumers.

12th place. Oasis RT-20

It is used as the main heating device in apartments and houses with autonomous heating. Also responsible for hot water supply. Copper heat exchanger has good thermal conductivity, which increases work efficiency.

With the help of the electronic panel, convenient and understandable control is carried out. The user only needs to set the required temperature.

A well-thought-out pricing policy allows you to purchase a high-quality multifunctional unit at an affordable cost.

What are users saying?

Advantages:

• electronic control;
• good power;
• completely safe;
• build quality;
• compact size, does not interfere;
• modern design.

Flaws:

• few functions;
• there is no clear instruction for setting up hot water, you have to experiment by typing;
• too small expansion tank;
• turbine noise.

Gas boiler Oasis RT-20 20 kW double-circuit

11th place. Protherm Bear 30 PLO

Excellent floor gas boiler for private homes. It works to provide heating, and complete with a boiler - for hot water supply. It is ignited using a piezoelectric element.

Combustion products are discharged naturally, in the presence of a chimney, or forcedly using a turbo attachment.

You can adjust the power by switching steps on the control panel.

What are users saying?

Advantages:

• heats a 3-storey house without problems (radiators and underfloor heating);
• easy to manage;
• you can connect the boiler;
• power adjustment;
• cast iron heat exchanger.

Flaws:

• the turbocharger is very noisy;
• the boiler rots in 5-7 years. Replacement is too expensive.

10th place. Baxi NUVOLA-3 Comfort

This is a real mini-boiler room, which includes not only a boiler for heating the house, but also a boiler that constantly maintains the desired DHW temperature. Thanks to this, you will not have problems with adjusting the water from the tap.

Using a room thermostat, the boiler automatically regulates heating depending on the weather outside. The coaxial chimney is not subject to freezing.

This is an ideal solution for those who need comfortable hot water supply and stable high-quality space heating.

What are users saying?

Advantages:

• reliable and stable operation;
• there is always hot water in the shower;
• high level of quality;
• you can connect "warm floors".

Flaws:

• complex remote control. It took a long time to deal with the remote control;
• Would like more hot water
• expensive pleasure;
• weak pneumatic relay.

Gas boiler BAXI NUVOLA-3 Comfort 240 Fi 24.4 kW double-circuit

9th place. MORA-TOP Meteor Plus PK24KT

The reliable and safe copper works absolutely silently. Does not leak and does not break for years. Despite its small size, it perfectly copes with its task - heating the house and providing hot water.

Easy to connect, has a simple and clear control. Multi-layered protection provides security.

What are users saying?

Advantages:

• economical, low gas consumption;
• wall-mounted, does not take up much space;
• there is always hot water;
• power saving mode.

Flaws:

• not cheap;
• after turning off the gas, the boiler is turned on manually.

Gas boiler MORA-TOP Meteor Plus PK24KT 23 kW double-circuit

8th place. Oasis BM-18

The boiler has a bithermic heat exchanger, that is, one circuit is built into another. It is convenient, reliable and more economical than traditional models. But for efficient operation, it is necessary to monitor the quality of the water, as scale and lime deposits can lead to breakage.

Good performance and a copper heat exchanger allow you to quickly heat the house, as well as provide its inhabitants with hot water. Energy costs are minimal.

Warranty - 2 years.

What are users saying?

Advantages:

• nice appearance, does not look like a monster;
• convenient and clear control panel;
• heats up water quickly
• safe.

Flaws:

• no remote control;
• battery ignition.

Gas boiler Oasis BM-18 18 kW double-circuit

7th place. Lemax Premium-20

The body of the boiler is made of high-quality two-millimetric steel and meets all the necessary standards. The heat exchanger is cylindrical, which ensures stable operation at pressures up to three atmospheres.

The unit does not depend on electricity, is equipped with multi-level protection. The top panel is easily removed, the boiler is convenient to clean.

Product warranty - 3 years.

What are users saying?

Advantages:

• inexpensive for such power;
• simple;
• easy to clean;
• gas consumption is small;
• works silently;
• even in the most severe frosts the house is warm;
• Italian automation;
• safe to operate.

Flaws:

• strains the steel heat exchanger, let's see how long it lasts;
• heavy and bulky, he needs a separate room;
• makes noise;
• unfinished automation.

Gas boiler Lemax Premium-20 20 kW single-circuit

6th place. Baxi LUNA-3 COMFORT 310Fi

A modern double-circuit unit is designed to continuously supply the house with heating and hot water. It is equipped with a removable digital panel, which also functions as a temperature sensor.

The boiler pleases with high efficiency - over 93%, which indicates not only efficient operation, but also efficiency. A nice feature is the ability to work in a wide pressure range, which is especially important for our country, where all kinds of drops often occur.

What are users saying?

Advantages:

• good performance;
• Italian assembly;
• reliable model;
• spare parts are always in the store;
• instant heating of the coolant;
• powerful pump.

Flaws:

• the backlight of the display falls into "sleep mode", it is inconvenient;
• no hot water circulation;
• the pressure sensor is inconveniently located;
• weak point - fan and pneumatic relay;
• nozzles for liquefied gas must be purchased separately.

Gas boiler BAXI LUNA-3 COMFORT 310 Fi 31 kW double-circuit

5th place. Lemax Premium-12.5

The domestic manufacturer is literally ousting the famous brands from the market. Excellent quality and complete lack of flaws. With proper installation and operation, this floor-standing boiler works efficiently and significantly reduces gas costs.

What are users saying?

Advantages:

• does not depend on electricity;
• powerful enough;
• economical;
• high performance;
• easy to manage;
• easy to connect to the heating system;
• Italian automation.

Flaws:

• not found.

Gas boiler Lemax Premium-12.5 12.5 kW single-circuit

4th place. Oasis BM-20

The wall-mounted boiler has forced water circulation, which ensures uniform heating. Safe to work and easy to use. The boiler can be hung on the wall in any room - kitchen, attic, basement.

The positive aspects are that the chimney designed during construction is not required, so the unit can be used in apartments with autonomous heating.

The model is equipped with a bithermic copper heat exchanger with high performance, which simplifies the design and ensures greater reliability. Excess condensate is discharged into a special container.

The service life is at least 12 years.

What are users saying?

Advantages:

• decent inexpensive unit;
• the quality of work is excellent;
• good design and cost;
• works quietly.

Flaws:

• a water filter is required;
• boiling water flows immediately;
• the ignition is powered by batteries, you often have to change them;
• low-quality automation;
• disposable dubious product.

Gas boiler Oasis BM-20 20 kW double-circuit

3rd place. Bosch Gaz 6000W WBN 6000- 12C

A wall-mounted gas boiler is able to provide a high level of thermal comfort and the constant availability of hot water. It has a pleasant appearance, is hung on the wall and does not occupy a usable area. On the front panel there are control buttons and instructions for the user.

It is calculated on heating of the area not less than 120 square meters. Unpretentious to changes in pressure and voltage. The primary heat exchanger is made of copper, which improves thermal conductivity. Hot water is heated by a plate heat exchanger.

With low gas consumption, it has high performance.

What are users saying?

Advantages:

• compact;
• fit well into the interior;
• silent;
• economical;
• many precise settings;
• You can set it up yourself using the Internet.

Flaws:

• Chinese assembly, solid marriage, designed for a year of work;
• dependence on electricity;
• too much plastic;
• parts are hard to find.

Gas boiler Bosch Gaz 6000 W WBN 6000-12 C 12 kW double-circuit

2nd place. Baxi ECO Four 24 F

The Italian-assembled boiler is designed for heating and hot water supply, including in the summer. The range of features is beyond praise. Can be connected to the "warm floor" system.

The combustion chamber is turbocharged. There are seven levels of protection. Heating area - at least 180 square meters.

What are users saying?

Advantages:

• reliable and unpretentious;
• easily converted to liquefied gas by replacing the nozzle;
• average price category;
• fully adapted to Russian conditions;
• summer/winter mode.

Flaws:

• expensive;
• spare parts and components are not cheap;
• noisy;
• poor quality buttons on the control panel;
• sensitive to voltage drops;
• capricious electronics, a year later the control panel failed;
• volatile.

Gas boiler BAXI ECO Four 24 F 24 kW double-circuit

1st place. Vaillant turboTEC plus VU

Despite its size, the boiler practically does not take up space, as it hangs on the wall. It is designed for space heating, as well as for water heating.

A feature of this model is a "hot start" - when you open a hot water tap, you do not need to wait until the heating starts, warm water will run immediately.

What are users saying?

Advantages:

• German assembly;
• the boiler is powerful, but economical in terms of gas consumption;
• copper heat exchanger evenly distributes heat;
• quality materials inside and out;
• digital control with LCD screen;
• multi-speed pump.

Flaws:

• turns off during power surges, a stabilizer is required;
• high price;
• began to buzz when the water was heated;
• depends on electricity.

Gas boiler Vaillant turboTEC plus VU 242/5-5 24 kW single-circuit

What features to look out for

In order to correctly and competently choose a gas boiler, carefully consider the following criteria.

• Power. The most important parameter. It completely depends on the area of ​​the heated premises and the specific coefficient for the region of residence. For example, if you live in the middle lane, then the value of the coefficient for every 10 m² is 1-1.2 kW, in the south - 0.7-0.9 kW, in the north - 2 kV. To calculate the power of the boiler for a house of 300 m² in a temperate climate, you need to carry out the following calculations: 300 * 1/10 \u003d 30 kW.
• Mounting method. Boilers are wall and floor. The first ones are compact, do not take up much space, are silent and affordable. The second ones are more powerful, bulky, and often require a separate room for their installation.
• The number of contours. Single-circuit devices are designed only for heating, double-circuit devices also provide hot water supply.
• Safety. It is desirable that the boiler be able to automatically turn off in all abnormal and emergency situations.

Important factors when choosing a device are the consumption of gas and electricity, efficiency, the availability of programmable conditions for night and day heating, price.

• Be responsible for calculating power. If it is not enough, then the room will heat up for a long time and cool quickly. A powerful boiler, on the contrary, will lead to overheating - this is an unprofitable use of resources.
• If there is no separate, well-ventilated room and chimney, then a natural draft floor boiler will not suit you. It is better to opt for wall-mounted boilers with forced draft.
• Do you already have hot water? Then you should not spend money on a double-circuit boiler.
• A biometric heat exchanger requires high-quality water without impurities. So if you do not have a water filter built into the water supply, then you will not save on such a boiler, because scale in the heat exchanger is guaranteed to lead to a breakdown.

Conclusion

As you can see, the choice of a boiler should be treated responsibly and with knowledge of the nuances. It is better not to rely on chance, but to turn to professional gas workers. They will help to correctly calculate the power and advise which boilers are suitable for heating your premises.

Among all types of boilers, gas units are perhaps the most popular and reliable. And this is not surprising, because our country has vast gas reserves, and this type of fuel is widely distributed even in remote settlements. However, even these seemingly well-known devices have a large number of differences, functions, installation methods and operating modes. As part of this review, we will try to disassemble gas boilers for heating a private house. How to choose the best option and prioritize for ordinary users? Let's find out.

Variety of boiler equipment

Read in the article:

Gas boilers for heating and hot water supply of a private house: how models are classified

The modern heating market has an incredibly huge range of gas equipment. For a general understanding, let's consider the classification of gas boilers according to various criteria.

If we talk about a simple design, then household gas boilers are classified according to the following parameters:

Note! In order to choose a good gas boiler for a private house, it is necessary to determine for what purposes it will be used and what area to heat.

Advantageous features of high-quality gas boilers:

1. The equipment provides a built-in automatic mode, which allows you to monitor the gas pressure.
2. In the event of a malfunction, the sensor sends a signal about this to the electric ignition system, after which the device continues to function normally.
3. The efficiency is very high, and the price of fuel is low. At the same time, the heater gives off a lot of energy, but at the same time consumes much less.
4. With the help of a gas boiler, you can heat quite large rooms or entire objects.

How to choose gas boilers for heating a private house according to functional features

From the correct choice of equipment, first of all, the durability of the boiler and the efficiency of its work will depend.

There are several main criteria for choosing when buying:

1. Material.
2. Gas consumption.
3. Availability of automatic mode.
4. Price policy.

Before buying equipment, it is imperative to calculate the required power for heating your particular home (below is a handy illustrated calculator). Here is an example of a simplified calculation for a small house:

1. If the room has 100 m², you will need a boiler at the rate of 1 kW / 10m².
2. The power indicator of the gas boiler should be 10 kW.

This is a very simplified example that does not take into account the individual characteristics of each building. But in general, the order of numbers is like this.

Related article:

Note! In certain places, you will need to cut some pipes with a grinder. New equipment requires new components.

After all, the equipment is dismantled. If wall-mounted equipment is being dismantled, then you need to take care of stable support so that it does not fall. The work is best done by two people.

How to install a new boiler

Connecting gas equipment

The scheme for installing a gas boiler in a private house includes a connection to:

• water pipe;
• gas pipeline;
• heating system;
• heating and plumbing return.

Note! Installation can be done independently only if there is experience in performing this work.

The connection diagram of a double-circuit gas boiler must include all the necessary piping. When you find a place, you need to carefully consider how to remove combustion products. The boiler is supplied with special mounting brackets. Only after the boiler is securely fixed, you can proceed to the connection of gas and water supply.

The kit includes:

Component	Description
Filters for rough water treatment	These are special cleaning devices that are designed to clean debris from pipes so that it does not get inside the boiler.
Magnetic direction filter	Removes scale and rust.
Gas filter	Installation is required. Extends the operating period and prevents dust from entering the boiler.
Ball valves	Disconnect the boiler from the main for repair work.
Expansion tank for heating system	First of all, this is a guarantee of durability.

During installation, it is imperative to comply with fire safety requirements:

1. There should be a distance of about 0.5 m between the appliance and the wall.
2. The gas boiler must not be installed next to a window opening.

Note! If electricity is needed to operate a gas boiler, then it is better to place the equipment closer to the source.

How to choose a voltage stabilizer for gas boilers for a private house

Specifications:

1. Power 23.2 kW.
2. Fuel consumption 2.3 m3 per hour.
3. Atmospheric burner made of steel.
4. Weight 52 kg.
5. The price of a heating boiler for a private house is 23 thousand rubles.

Unit "AOGV-11.6-3 ECONOMY" and its characteristics

This type of equipment is volatile and is intended for heating for numerous small buildings.

The reservoir has a number of features:

1. Power up to 25 kW.
2. Fuel used: natural gas.
3. The plug with a diameter of 4 cm for connection is mounted in the rear part.
4. The chimney channel is located at the top.
5. Models meet, with one and two interruptions.
6. The cost of equipment is 15 thousand rubles.
7. Steel heat exchanger.

A small boiler with a power of 11 kW will give about 4-5 liters of liquid.

Features of the gas boiler "BUDERUS LOGANO G234 WS-38"

Model characteristics:

1. Power 38-60 kW.
2. Cast iron heater.
3. Atmospheric burner.
4. Automatic device.
5. Connection of the "warm floor" system.
6. Possible heater connection.

The equipment is made for heating various types of premises up to 380 sq.m. Thanks to the cast-iron heat exchanger, the service life is up to 15 years.

The equipment can be operated even at very low temperatures. To operate the boiler, you will need a connection to a 220 V network. The boiler provides for an open combustion chamber.

"BAXI SLIM 2300 Fi" - a great sample at an affordable price

The power range in this model range is from 16 to 63 kW. Modern design and small dimensions make it easy to install equipment in any interior.

Description and operation:

• The Baxi Slim 2300Fi gas boiler with a built-in boiler and in heating mode provides for electronic modulation of fire.
• Electric ignition turns on very smoothly.
• There is a mode of reconfiguring the system for burnt gas.
• Steel sample of the burner.

Hydraulic system characteristic:

• The heat exchanger is made of cast iron.
• Built-in high speed circulation pump.
• There is a pump for heating water.
• Pressure gauge.
• It is possible to connect an external storage heater.

How is the temperature controlled?

• There are two ranges for temperature control.
• Automatic mode, sensor connection system for outdoor temperature control.
• Built-in automation with maintaining the temperature regime in the heating circuit.

There is a temperature display.

Fourth generation equipment "VAILLANT ecoVIT VKK INT 366"

Due to its high performance and power, the equipment has become a leader among the gas industry in Germany. The model gained popularity due to the built-in diagnostic system. Therefore, the equipment works more efficiently, while saving the electrical system.

Advantage Features:

1. The efficiency is 98-109%.
2. Power modulation from 35 to 100%.
3. Additional heat is used due to the fact that vapor condensation occurs.
4. There is a forced outlet to the pipe.
5. There is a steel heat exchanger.
6. There is low temperature protection.
7. Electric ignition.

Along with the above indicators, 2 modes of fuel operation can be noted. Water is heated in layers, there is an electronic ignition system, there is control over gas pressure.

Rating of wall-mounted gas boilers: the best models

If we talk about the choice of boiler equipment, then the brand plays an important role for many users.

Below we consider the functional features of popular wall appliances.

Excellent sample "WOLF CGG-1K-24" and its characteristics

Functional features of the equipment:

1. The gas boiler works even with a significant mains voltage from 40 to 400 watts.
2. High efficiency of 90%.
3. Functioning occurs even with unstable gas pressure.
4. Water is heated even at a pressure of 0.4 bar.
5. Mounted gas boilers Wolf CGG-1K-24 simulate power up to 23 kW, this allows you to select the desired mode of operation and save gas.
6. A copper heater and a burner will allow you to create the necessary efficiency mode.
7. Automatic temperature control.

Specifications:

• Fuel: natural gas.
• Power 25 kW.
• Tank volume: 6 liters.
• Temperature range: 30-90 degrees.
• The temperature regime of a double-circuit turbocharged boiler is 30-60 degrees.
• Weight: 29 kg.
• Price: 55000-65000 rubles.

"BAXI LUNA 3 COMFORT 240 Fi" is one of the best boilers

• Suspended sample with 2 interruptions is made for buildings with an average quadrature.
• There is a built-in panel, which is a temperature sensor.
• Also the model is equipped with the high-speed circulating pump.
• The tank has a volume of 8 liters.

The operation of the system for heating a private house:

• In the heating system mode of the gas boiler, electronic flame control operates.
• The burner is made of stainless steel.
• There is a fuel switching mode.

Control and security system:

• There is a special reliable protective device against low temperature conditions.
• There is a safety valve.
• A draft sensor is provided for equipment with a closed chamber.
• The safety lock system is activated.
• There is control over the flame.
• There is a built-in system that remembers the last mistakes.

The price of a double-circuit gas boiler for a private house is 51,000 rubles.

Boiler "NAVIEN DELUXE 24K": comfort and reliability

Samples of the Korean company are in demand because of their low cost and excellent quality.

Characteristics:

1. This type of gas boiler has two heaters.
2. Another important point is that the manufacturer produces all the details of the boiler independently.
3. There is a special built-in chip that reliably protects the equipment from sudden power surges. This protection is present in the German manufacturers of Vailant, but the sample already belongs to a completely different price category.
4. And the most distinctive feature of the Navien Deluxe 24KCoaxial gas boiler is the control unit with a digital display. The display warns all faults and errors, the control mode is manual.
5. Another important point is a special built-in sensor for the temperature in the room.

Absolutely all components are included with the boiler. The price of the equipment is 25 thousand rubles.

Gas boiler "PROTHERM GEPARD 23 MOV" and its features

Equipment with two interruptions are created with a power of up to 25 kW.

Installation can be made absolutely in any room and has the following characteristic features:

1. The burner flame is modulated automatically.
2. There is a built-in circulation pump.
3. The tank has 5 liters.
4. The heat exchanger is made of steel.
5. The switching mode is automatic as soon as the hot water tap is opened.
6. There is a built-in operating display indicating errors, temperature and pressure.

The price of equipment is 35,000 rubles.

One of the best models "BOSCH GAZ 4000 W ZWA 24-2 A"

Functional features:

1. There are two heat exchangers for hot water preparation.
2. Steel burner.
3. 8 liter tank volume.
4. Circulating pump consisting of three layers.
5. There is a modulating gas valve.
6. The boiler works in dual mode with fuel.
7. There is a built-in power control modulation system.
8. The temperature is indexed.
9. Low noise level.
10. There is a built-in make-up tap.

"VAILLANT ecoTEC PLUS VUW INT IV 246" performance data

This type of equipment provides economical fuel consumption and the highest level of environmental performance.

Before choosing a gas boiler for heating a private house, consider its functional features:

1. There is a specially developed electronic system (gas-air).
2. Stainless steel heater.
3. Excellent pressure regime, both in the circuit and in the boiler.

Excellent multifunctional display with built-in backlight.

Conclusion

Summing up, we can conclude that the best boiler is the one that works without breakdowns, so you can follow some tips:

1. When choosing equipment, make sure that it does not exceed the rated capacity.
2. The best material for a burner is steel.
3. A secure system should have a minimum set.
4. All pipeline boilers are best selected from steel raw materials.
5. The problem with heating involves the use of a double-circuit boiler.

Double-circuit gas boilers are a convenient way to solve the issue of heating and supplying a private house with hot water. They are easy to use, have the highest efficiency and reliability, the main thing is to choose a boiler that is suitable for its characteristics.

The functionality of double-circuit boilers is due to the features of their design. They are equipped with two heat exchange circuits, one of which heats the closed heating system, the second - water for household needs.

The heat carrier in the primary circuit is heated in the gas combustion chamber. Water for the DHW system is heated by the hot coolant from the primary circuit only at the time when you open a tap with warm water. At the same time, the valve built into the boiler shuts off the supply of coolant to the heating system.

The longer the hot water tap is open, the more the heating system cools down. Therefore, if the need for hot water is high, buying a double-circuit boiler is impractical, in this case it is better to choose a single-circuit boiler, and to it

Selection by types and parameters

Double-circuit gas boilers are presented on the market with a huge variety of models, and it is sometimes difficult to understand which one is better to choose. Therefore, for the right choice, you must clearly understand the characteristics you need.

These include:

• power, that is, the ability to effectively heat the desired area and heat a sufficient amount of water;
• boiler installation method - mounted (wall-mounted) or floor-mounted;
• type of combustion chamber, it can be open or closed;
• principle of operation - convection, requiring, or condensation, allowing the use of a coaxial chimney;
• degree of automation, type of ignition and the presence of protective functions;
• manufacturer and the degree of trust in him.

Such parameters as power and principle of operation depend on the thermal characteristics of the building and its area. Otherwise, the choice of the buyer is usually determined by his stylistic preferences and taste, needs and price of equipment.

Power

It depends on this parameter whether the boiler is really capable of heating the house for a long time, efficiently and without overloads. A full-fledged heat engineering calculation, which is performed by service specialists, should take into account all the features of the structure:

• wall material and degree of thermal insulation;
• number and total area of ​​windows;
• ceiling height;
• the presence of complex elements - bay windows, glazed heated terraces, greenhouses.

It is quite difficult to perform such a calculation on your own, therefore, a simpler method is usually used. It is enough to calculate the total area of ​​​​heated premises, and then apply the formula:

P = S 100 / 1000.

where P is the required power, kW;

S - area in meters.

For a detached house with insufficient insulation, this figure is increased by 15% in temperate latitudes and by 30% in the northern regions.

So, for an apartment with an area of ​​​​120 square meters, the nominal power of the boiler is 12 kW, but for a private house built in the Moscow region, it is better to choose a power of at least 15 kW, and for a colder region - 20 kW. This will allow the boiler to work without overloads.

You should also pay attention to the performance of the DHW circuit. To calculate the consumption of hot water, you need to know the number of water points in a private house and the likelihood of their simultaneous operation. At the same time, a flow rate of 400 liters per hour (6.6 liters per minute) is taken for each point. If two or more points are turned on at the same time, this indicator must be increased by the calculated number of times.

The total capacity of the boiler, sufficient to heat a private house and provide it with hot water, is the sum of the capacity of the heating system and the capacity of the heat exchanger for hot water supply.

Wall or floor?

The installation method of the boiler depends on its power.: models designed for heating a private house up to 200-250 square meters are usually available in wall-mounted versions. They are compact and do not exceed in size, they can be placed in any convenient place, for example, in the kitchen or in the bathroom.

Such boilers are designed for a hot water capacity of not more than 14 liters per minute and can simultaneously provide two points of water intake. To reduce losses, it is recommended to install them close to hot water consumers.

Boilers with a total power of more than 20 kW are usually floor-mounted. Their dimensions and weight are superior to wall models, and it is better to place them in a boiler room with an equipped supply and exhaust ventilation system. The requirements for a particular model depend not only on the size, but also on the principle of operation and the type of combustion chamber.

Combustion chamber - which is better?

Gas boilers can be equipped with an open or closed combustion chamber. They differ in the way air is supplied to the combustion zone. In an open chamber, air is sucked in from the volume of the room in which the boiler is installed.

Therefore, they can only be installed in a boiler room equipped with a window or forced ventilation, otherwise the air in the room will become unbreathable. In addition, to ensure stable draft and complete removal of flue gases for such a boiler, it is required with a height of the vertical part not less than that indicated in the passport.

The combustion chamber of the closed type allows you to install the boiler in any room of the house. In this case, a coaxial chimney is used to supply air and remove exhaust gases, consisting of two corrosion-resistant pipes located one inside the other. Flue gases exit through the inner pipe, and fresh air taken from the street enters through the space between the pipes.

At the same time, fresh air is recuperated (heated), which has a positive effect on the combustion process. The coaxial chimney can be brought out horizontally through the wall. Thrust in this case is provided by a built-in fan. Wall models usually have a closed combustion chamber, so they can be used not only for heating a house, but also in apartments.

Principle of operation

According to the principle of heat removal, gas boilers can be convection and condensing. The difference lies in the fact that in convection, the coolant is heated in the combustion chamber, and in condensation, the heat obtained during the condensation of steam is additionally used.

The advantage of a condensing boiler is its high efficiency- up to 96%. But him minus - strict requirements for the design of the heating system: the temperature of the return water entering the heat exchanger must not exceed certain values, usually 60 ° C, which requires professional calculation and adjustment of the system and large expensive radiators.

The implementation of the convection principle of heating is possible in boilers with any combustion chamber. Condensing boilers always have a closed combustion chamber.

Energy dependence, degree of automation and type of ignition

The simplest models of gas boilers do not require an electrical connection. Their functionality, as a rule, is low - they have an open combustion chamber, require connection to a full-fledged vertical chimney, and their start-up is carried out only manually.

Modern models of gas boilers are connected to the mains, they are equipped with automation that allows them to work completely autonomously, without human intervention.

Two parameters important for usability:

• number of heating stages;
• ignition type.

Heating steps are the modes in which the boiler can operate in order to provide the specified heating parameters.

The cheapest models are single-stage. In them, the heating process alternates with the standby mode. Upon reaching the set temperature, the boiler stops the combustion mode, and heating will start again only after the coolant has cooled to the lower allowable value. This may result in uneven heating.

With two- and three-stage heating, the boiler automatically selects the combustion intensity depending on the set temperature, so that the coolant does not overheat and the room temperature remains stable. The price of such models is slightly higher.

Ignition type in gas boilers sometimes manual- using a piezoelectric element, or electronic- in models equipped with a control unit. Piezo ignition after shutdown requires manual start, the electronic one turns on itself after a break in the power supply or elimination of the emergency operation of the boiler.

Other convenient features built into the gas boiler help make its operation completely safe. Almost all modern models of boilers are equipped with them. Such functions include control of the flame, draft, gas flow and other modes of combustion and heating system.

You can find out by the codes that are reflected on the display of the electronic control unit, some models also allow you to connect a GSM notification system via SMS.

Famous brands and manufacturers

Focusing only on the equipment manufacturer is not entirely correct, since most companies have a wide range of models with a wide variety of functions. But buying gas equipment from an unknown manufacturer, even with high-quality assembly, carries a number of risks. That's why When choosing a manufacturer, you should pay attention to the following nuances:

• warranty period and period of use of equipment;
• the location of service centers where repairs or maintenance can be made;
• the ability to buy or order spare parts and consumables;

The risk of unjustified overpayment is primarily manifested at the time of purchase of equipment. It is better to buy a boiler with some margin from the required calculated values ​​​​of the parameters of the heating system. What are these parameters and which gas boiler to choose?

Deciding…

Device functionality

When choosing a, it is necessary to determine its functionality: it will be a single-circuit boiler or a double-circuit one.

A single-circuit gas boiler provides heating of the coolant transported to the heating system by a circulation pump. To provide hot water supply at the facility, such a boiler is paired with an indirect heating storage boiler, which stores a supply of water to ensure the “uninterrupted” hot water supply system.

A double-circuit boiler uses two independent circuits: one for the heating system, the second for heating sanitary water in flow mode, the performance of which is sufficient to provide one or two points of water intake (for example, kitchen and bathroom).

Mounting option

Gas boilers are either wall-mounted or floor-mounted. Each of them has a modern ergonomic design that allows you to organically fit into the interior of the kitchen or other premises.

The wall-mounted option is the best solution for an apartment or residential building. The ability of such units to take up a minimum of space on the wall, organically fitting into the kitchen set or "hidden" in the corner of the attic or basement, speaks only in their favor. After all, the performance parameters are impressive.

Mostly such devices are double-circuit: designed both for "supplying" heat to the heating system, and for providing hot water supply to the facility (DHW).

Floor construction - differs in "demanding" to the seat, they have, mainly, higher rates and are better able to heat large objects.

Outdoor units can be equipped (in addition to atmospheric) with a replaceable pressurized gas or liquid fuel burner, which simply expands the possibilities of using a heat generator.

The principle of operation and features of the device

According to the principle of gas combustion, you can choose:

• boilers with an open combustion chamber;
• boilers with a closed combustion chamber.

Combustion in open-type combustion chambers is provided by oxygen coming directly from the room in which the gas apparatus itself is located. Combustion products are thrown out through a special chimney outside the premises. The main requirement is that a chimney must be equipped, and the room must be constantly provided with an influx of fresh air, that is, ventilated, since gas heaters "eat" a lot of oxygen from the room where people can be.

In the absence of an equipped chimney or the ability to “organize” it, the best option is to use a gas boiler with a closed combustion chamber.

For its operation, a special coaxial chimney and a smoke exhauster-fan are used, which removes combustion products from the furnace in forced mode. For such devices located on the walls of apartments or private houses, a coaxial chimney is used that passes through the wall to the outside. And the arrangement of an expensive conventional stationary chimney will require significant funds and time.

Heat exchanger material

The cold coolant is heated while passing through heat exchangers, which can be made of various materials. There are heat exchangers:

• cast iron - you can say about them: durable, reliable, expensive. They are "long-livers", although they are "afraid" of a sharp temperature drop;
• steel - the prerogative of inexpensive models of boilers. Afraid of corrosion, although more ductile and lighter;
• copper - the leaders of heat exchange components. Corrosion resistant. With a small mass, they are ideal for wall-mounted boiler models.

The choice is determined by the type of heat generator and financial capabilities.

Power calculation

It is possible to determine the required heater power by means of relatively simple calculations. For this:

1. Perform an average calculation of the heat loss of the room. If the heated room does not border on other unheated rooms, then for 1m2 heat loss can be taken as 100 W. For corner rooms and in the presence of large-area glazing in the room, the “need for” heat is increased to 150 W / m2.

On average, for an area of ​​​​a cottage or apartment of 250 m2 with a ceiling height of up to 3 m, it will be enough to choose a gas heat generator with a power of up to 25 kW. More accurate calculations can be performed only with a detailed study of the object and its needs for heat and hot water.

2. In the case of using a double-circuit heating unit or a single-circuit heating unit with a storage boiler, the need for hot water supply of the facility should be taken into account. The math here is pretty simple. About 400 liters of water are poured out of a standard mixer tap per hour. Since the passports of gas and other boilers indicate its DHW capacity per 1 minute, then to provide hot water to one point of consumption, it is enough to divide 400 liters per hour by 60 minutes.

400l/h/60min = 6.6l/min.

By choosing a device with such a DHW capacity, you will satisfy your needs for hot water. With more water intake points, this performance value must be multiplied by the number of points. It should be understood that such performance is indicated with an increase in the temperature of the water leaving the heat exchanger by 25-35 degrees (see the passport).

Note! With insufficient DHW performance, it is better to work out such an option as installing an indirect heating storage boiler with a volume of 40 to several hundred liters. In it, due to the heat of the betrayed coolant, water is heated and “stored” at a certain temperature for a long time.

According to the method of power control, gas boilers are distinguished:

• single-stage - operate at the same power level, control is carried out by switching the burner on and off periodically;
• two-stage - have two modes of operation, and the output real power is determined by the frequency of switching on and off the burner;
• with the possibility of a smooth (modulated) power change - units that not only consume gas optimally economically, but also treat themselves “carefully”.

From the point of view of financial "policy", it may be beneficial to purchase a two-stage unit, which is able to economically provide the house with heat, both in the cool season and in severe frosts. Reducing the frequency of switching on / off the burner significantly increases its serviceable life.

The power of the device also affects the way it is installed, since for wall-mounted options the “ceiling” of power is 32 kW, when starting at 18 kW, and floor-mounted specimens can develop more than 100 kW of power.

Additional boiler options

Gas boilers are aimed at "independent" heating of the coolant for the heating system and sanitary water for the needs of consumers. These high-tech devices are controlled automatically.

What other advantages can modern gas boilers offer us:

• their ability to dynamically change the room temperature without human intervention (according to a predetermined program),
• independently control the performance of all heat generator systems;
• ensure the safety of its operation for the facility and people in the room (shutdown in the absence of gas supply, draft in the chimney or leakage of coolant from the system). The same automation will turn on the device on its own when restoring system parameters;
• maintaining efficiency with significant fluctuations in gas pressure in the main, which is relevant and better when used in the domestic gas supply system;

Attention! When buying equipment, pay attention to the nominal and minimum gas pressure values ​​stated in the passport documentation. Russian gas pipelines may not provide the necessary pressure for some models of foreign units.

• the presence in the circuit of the burner power control system, which allows you to get from 37 to 100% of the possible heat from it if needed. Power reduction avoids intensive scale formation in heat exchangers, which increases the “healthy longevity” of the device;
• the presence in the design of the device of the primary circuit temperature control module allows you to quickly (instantly) respond to a sharp increase in temperature in the heat exchanger, reducing the burner power;
• the presence in some models of a magnetic system designed to reduce the formation of scale in the system - passing through a constant magnetic field, salts in water line up so that they do not settle on the pipe walls when the heat exchanger is heated;
• the presence of an electronic ignition system allows you to better control the burner without using a constantly burning igniter, as with piezo ignition, which also significantly saves gas.

More expensive, but better...

In the last decade, more expensive, but also capable of saving a significant amount of gas, condensing boilers are confidently making their way on the domestic market.

Unlike traditional convection boilers, condensing-type units are able to produce 10-25% more heat with the same volume of burned gas. This is due to the use of heat from water vapor in the heat exchanger and their transition from a gaseous state to a liquid one.

The overpayment for such a unit at the time of installation of the heating system pays off quite quickly due to significant fuel savings.

You can also choose non-volatile boilers that can operate without consuming electricity, but since most heating systems today operate on the principle of forced circulation of the coolant, the circulation pump will still have to be powered. But such a boiler can be ideal for providing hot water.

Attention! Work with gas equipment should be trusted only to professionals with the appropriate work permit. This will allow you:

• choose the right heat generator;
• be in guaranteed safety during its operation;
• not have unpleasant contacts with such services as organizations controlling gas supply, which will certainly arise when unauthorized equipment is connected to the gas main.

After all, gas, escaping to freedom, can severely punish for the mistakes made.

We touched on the main points that should be touched upon and studied when choosing. It remains for you to decide on the parameters and still consult with professionals in your area regarding which gas boiler is better to use at your facility.

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.
	Everything is clear with the body - 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 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.

Gas boilers - the best solution if it is possible to install them

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 system for equipment diagnostics. 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 written to the leaders of 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 went 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