How to choose a gas heating boiler. Which boiler is best for a private house. How to calculate the optimal value of the heat output of a gas boiler

Gas boiler is a heating device that uses natural gas to generate heat. This type of fuel is cheaper than electricity, which is why gas-fueled devices are so popular. "Plumber Portal" will tell you about the features of the equipment so that you can choose an effective, reliable and safe one- or two-circuit gas boiler for heating a house from all the variety of these devices.

To understand which is the best unit for an apartment or house, you must first study the types of gas-fired heating boilers.

So, household gas heating boilers can be classified as follows:

1. By material: cast iron, steel, copper.
2. By location: wall and floor.
3. By the type of combustion chamber: open and closed.
4. By the number of contours: single-circuit and double-circuit.
5. By the presence of additional functions, automation, external characteristics.

Let's analyze the types of gas boilers in more detail.

Heat exchanger material

It is worth choosing an internal heat exchanger for heating equipment very carefully, since liquid circulates inside it, and a powerful flow of thermal energy moves outside. Therefore, the material for the manufacture of the heat exchanger must have good thermal conductivity, which determines the efficiency of the device, and at the same time a high margin of safety.

Manufacturers install gas heat exchange coils in the boiler, made of:

• cast iron;
• of stainless steel;
• copper.

At first glance, a boiler with a cast iron heat exchanger is the most reliable, since it is the least susceptible to corrosion. However, such units are very heavy, and very often, from non-observance of the rules for operating the device, a cast iron heat exchanger cracks in the zone of contact of a liquid with a very different temperature. Such a device requires more frequent flushing.

Because of this, many homeowners choose to connect a steel heat exchanger coil. Devices made of stainless steel are cheaper than copper and cast iron units. In addition, steel is very plastic, so the likelihood of cracks in areas with temperature changes is much lower. However, such heat exchangers, being in the heating circuit, quickly corrode.

Thus, the most reliable choice is a copper heat transfer device. Copper has the best heat transfer rate, is highly resistant to corrosive processes, has good ductility, and low weight. Copper heat exchanger coils are very compact, but the high price of such devices makes one choose less reliable, but cheaper units.

Heat exchangers are also distinguished by the type of internal design: conventional and bithermal... In the first case, it is meant to connect only one liquid circulation circuit, and in the second case, you can connect two water circulation circuits at the same time. Double-circuit boilers equipped with two conventional heat exchangers or one bithermal coil, which is much more economical.

Combustion chamber and burner type

Heating is impossible without maintaining gas combustion using room or street oxygen. In the first case, the heater package contains an atmospheric burner for natural circulation of air flows, and in the second case, the device is equipped with a closed burner with forced oxygen injection. In this regard, the consumer can choose a gas boiler for a home with one of two types of combustion chamber:

1. Open - to maintain the combustion process in the firebox, air comes directly from the boiler room or the room where the gas equipment is installed.
2. Closed - oxygen for the combustion of the flame is taken from the street using additional ventilation or a chimney designed according to the "pipe in pipe" principle.

If we choose between a closed combustion chamber with a turbo burner and an open chamber with an atmospheric burner, then it should be understood that an open combustion chamber will require the installation of a chimney of 5-7 meters in order to ensure natural draft, which is not always possible. Therefore, each individual case requires an individual approach.

Wall and floor models

Everything is very clear here - floor-standing gas boilers for heating a private house can only be installed on the floor, since their dimensions, weight and power are much larger than a wall-mounted gas boiler, which is used when space is limited. Wall-mounted gas heating boilers are usually installed in the kitchen of an apartment building.

At the same time, the installation of a gas boiler in an apartment requires compliance with certain installation standards, which are much stricter than when a gas boiler is mounted in a private house.

1. Wall-mounted appliances have a relatively low power, which averages 35 kW, since wall-mounted boilers are equipped with a copper heat exchange coil, which is not able to withstand too high temperatures.
2. Gas floor units are the best choice of heating device for a private house, since such equipment can easily heat a building with an area of \u200b\u200bup to 700 sq m. There are even outdoor models that can be installed outside a residential building.

Floor-standing double-circuit or single-circuit devices, depending on the batch configuration, can be equipped with a turbocharged or atmospheric burner. A distinctive feature of turbocharged models is a high efficiency and a high margin of safety, while a unit with an atmospheric burner is more durable and quieter, and their cost is less.

Single and double-circuit gas boiler

Considering the varieties of gas heating equipment, one cannot fail to note its differences in the number of circuits.

A single-circuit gas boiler for heating a private house in its standard configuration is used only for heating a building, and floor-standing or wall-mounted double-circuit devices, in addition to heating rooms, also supply hot water to the water intake points.

In order for a single-circuit gas boiler for heating private houses to also perform the functions of double-circuit devices, you can additionally connect a boiler. But it is still better to immediately use a double-circuit gas boiler for heating houses.

Connection diagram of a single-circuit unit with a boiler:

There are also significant differences in the design of these types of gas heating equipment.

A double-circuit wall-mounted one is much more compact than its single-circuit counterparts, so they are the best option for a small room with a lack of free space. Moreover, such models put forward higher requirements for operating conditions.

Since double-circuit devices heat the water in the system, then for automatic switching on of hot water supply, it is necessary that the incoming water flow has a good pressure and therefore the flow of hot liquid increases significantly.

In addition, the double-circuit floor version not very suitable for rooms with a large area if the water intake points are too far from the liquid heating device. This feature of double-circuit equipment is due to the fact that an additional circulation pump in this case cannot be connected.

Single-circuit devices also have design features that affect the operation and installation of gas equipment. First of all, it is worth noting the large dimensions of such units, as well as the laboriousness of the process of installing a gas boiler in a private house.

Moreover, if a boiler is included in a single-circuit system, then it can be equipped with an additional circulation pump that will supply hot water to several points of water intake - shower, kitchen, sink, but the efficiency of such a single-circuit heating equipment is limited by the volume of the boiler, and the cost of the system increases.

Which appliance is better for home?

The selection of a gas boiler for a private house largely depends on the area of \u200b\u200bthe room and other factors.

The technical documentation for the gas heater certainly includes information on the requirements and power ratings of the appliance. Often the manufacturer indicates the area of \u200b\u200bthe room that this boiler can heat, as well as instructions on how to install the unit.

When calculating, an experienced heating engineer should take into account:

• cubic capacity and area of \u200b\u200bthe room;
• the climate of the region of residence;
• quality of external wall insulation; the number and size of windows, as well as what type of glass units are installed in them;
• the presence of balconies and street doors;
• heating system data, etc.

In addition, it is necessary to take into account the quality of the fuel and the gas pressure in the line. A separate calculation must be made for the DHW system. And only after that, both figures are summed up, and then increase by 15-20% for the reserve, so that the boiler can cope with the peak and constant load.

There are a lot of characteristics for choosing a gas boiler, but the main ones are:

1. Equipment power output.
2. Layout device (number of circuits, material of which the heat exchanger is made, type of housing).
3. Place of installation.
4. Is there automation for the safe operation of the equipment?
5. Price. Not always a cheap, poor quality option.

All these points are interconnected. If there is no space for installing the unit large sizes or the desire to install a device in the kitchen, whose appearance will be in harmony with the interior of the room, forces you to opt for a wall-mounted model, whose power is much less than a floor-standing device. And if necessary, heat hot water is forced to buy double-circuit equipment.

The best models of gas boilers

Nowadays, the market offers a wide range of this equipment in various price categories - from fairly cheap Chinese-made products, which are of rather dubious quality, to boilers with turbocharged combustion chambers and other technical bells and whistles from branded manufacturers, but the price of such devices is quite high.

There are several types of gas boilers, so when choosing equipment for your home, you need to know exactly what you need.

1. Vaillant atmoVit INT 164-564 / 1-5 is the best device for a home with an area of \u200b\u200b50 to 150 m2. The cost is 81,000 - 100,000 rubles.
2. Bosch WBN6000-18C RN S5700 is the optimal double-circuit model for buildings ranging from 100 to 180 m2. The price is 36,000 - 43,000 rubles.
3. Viessmann Vitopend 100-W type A1JB 12 kW - the best ratio of price and quality in a double-circuit condensing version for structures up to 120 sq m. The cost of Viesman is 35,000 - 41,000 rubles.
4. Ferroli Divatech F24 D is the best option for heating and hot water supply of buildings ranging from 100 to 240 m2. Price 40,000 - 45,000 rubles.
5. BAXI SLIM 1.490 iN is the best single-circuit unit for heating a private house from 200 to 300 m2. The cost is 70,000 - 78,000 rubles.
6. Buderus Logano G334WS-73 is an ideal model for a home with an area of \u200b\u200bover 300 m2. The cost is 315,000 - 350,000 rubles.
7. Protherm Medved 30 KLOM is the best outdoor Protherm model with an open burner for buildings up to 260 m2. Price 49 000 - 55 000 rubles.
8. Irbis Khoper 25 SABK is the most budgetary unit with acceptable build quality for buildings up to 250 sq. M. The cost is 33,000 - 36,000 rubles.

These companies have been presenting their products on the market for a long time and their quality has been tested by a huge number of customers. Domestic equipment ("Irbis"), although it is inferior in ease of use and performance characteristics of devices manufactured by foreign firms, but perform their main task properly.

Temperature characteristics for all models are not very different. All boilers comply with all safety standards and norms, but more expensive models have a complex multi-stage self-diagnosis system, as well as a fairly effective automatic protection. The service life and reliability of the equipment are characterized by the quality of assembly and parts, well, naturally, compliance with all requirements and operating standards.

Installation rules and subtleties

The site consultants recommend that you strictly follow the rules for installing a gas boiler. To install such equipment in a house, you must obtain permission. This opportunity will appear only after a number of the following conditions are met:

• the room must be equipped with good ventilation and a source of natural light, which will be required to maintain the equipment;
• in the boiler room, the ceilings must be at least two and a half meters, the area of \u200b\u200bthe room must be at least 4 m2, the doorway is 80 cm wide;
• the power supply system must be equipped with current and thermal protection. The choice of a voltage stabilizer for gas boilers is a separate point that needs to be considered separately and enough attention must be paid to it;
• the width of the chimney directly depends on the power of the boiler. For example, the power is about 30 kW, then the chimney diameter must be at least 13 mm;
• the presence of pressure and temperature sensors;
• it is prohibited to install gas equipment in basements;
• the gas pipeline must not be laid in fire hazardous areas;
• regardless of the type of gas pipeline (closed or open), the pipes for it must be metal;
• the boiler room must have a gas level analyzer, as well as an electric valve, which, if necessary, will cut off the gas supply.

Useful advice! To install a gas boiler, as well as draw up all the necessary documentation, you need special tools and professional skills. If you have neither one nor the other, then the best solution would be to contact the organization that deals with this.

If you have made the decision to independently change the old heating equipment to the new one, then it would be best to do this in the following sequence:

• flush out the old heating system. If the pipes are clogged, this will significantly reduce the service life of a new boiler, even of very high quality, therefore it is recommended to use a special compressor to eliminate blockages and impurities. If it is impossible to clean the pipes, then simply replace them with new ones;
• dismantle old equipment;
• install new equipment, taking into account all the recommendations that are in the boiler operating instructions;
• connect the boiler to the flue gas system. If the house does not have its own chimney, then it is better to take care of purchasing a coaxial chimney. The equipment manual usually talks about the requirements for the characteristics of the chimney. This is a rather important point, since due to the insufficient width of the chimney or its low height, most of the combustion products will enter the room;
• the boiler must be connected to the gas pipeline. You can't do this with your own hands. This is done only by organizations that have the appropriate permission;
• the unit crashes into the heating system and the PVA system;
• commissioning works are in progress. They are quite an important point during installation, since the efficiency of the operation of both the boiler itself and the entire system depends on them in the future.

To install a new gas boiler, you will need to perform a number of the following steps:

• check the presence of all components - they must have a mounting template, a strip for connecting gas and water, the necessary pipelines and the boiler itself;
• select a level in order to fix the hinged bar, then attach it;
• install gaskets for gas and water pipelines by removing protective plugs;
• mount the boiler itself, then connect the water circuit and the gas supply system to it;
• connect the power supply and equipment to the chimney.

Pay particular attention to voltage drops. Which voltage stabilizer for a gas boiler is better suited depends on the power model of the equipment itself.

Thus, before choosing a gas boiler for a private house, it is necessary to determine the requirements for its functionality. For houses where there is a boiler or a water heater, the purchase of a double-circuit boiler will be an irrational solution, due to the waste of money, but if there is a need for the arrangement of hot water supply, a double-circuit gas boiler for heating the house will be the best solution.

The key element of the heating system of a private house is the boiler. In many respects, the air temperature in the room and the total costs associated with heating payments depend on the quality of the device itself, on the efficiency of its operation. Wall-hung boilers have the main advantage over other similar heating equipment: they take up a minimum amount of free space. There are a large number of different models of wall-mounted units on the market, which differ from each other in a number of parameters:

• Number of circuits: single-circuit are designed exclusively for heating, double-circuit will also provide the house with hot water;
• A type of combustion chamber - open (needs a natural chimney system) and closed (from it, the combustion products are forcibly sent to the coaxial chimney, which is the safest);
• The presence of electrical devices;
• Burner type: atmospheric or modulating, the power of which the boiler regulates independently.

When developing this rating of the best wall-mounted boilers of the year, we took into account all these features, we also took into account the opinion of buyers, the country where the equipment was created and released. We tried to compile the most understandable and informative rating so that after studying it, it would be easy and simple for the reader to choose the most suitable heating boiler for his home.

10. Oasis BM-16

This boiler is allowed to be used in rooms where the air temperature is not lower than +5 degrees, it is installed in strict accordance with the gasification project. It is perfect for houses or apartments, has a high performance and a good efficiency - about 92%. The design has a reliable circulation pump that allows you to easily raise the coolant to the level of the second floor.

Average service life is about 12 years from the date of the first launch. The heat exchanger is made of copper, the combustion chamber is closed, equipped with a fan for removing combustion products. The safety system of the device has several levels, the boiler can independently carry out diagnostics. If errors are found, their codes are displayed on the device, there is a built-in condensate drain. The device is economical, consumes a minimum amount of fuel. The weight of the unit is small - it can be lifted by one person.

The chimney is allowed to use coaxial or separate. The boiler runs on natural or liquefied gas, the temperature of the coolant is regulated from 30 to 80 degrees, hot water - from 36 to 60 degrees. When equipping a hot water supply system, it must be borne in mind that the minimum volume of passing water must be at least 3 liters per minute. Ignition is carried out by means of a built-in piezoelectric element.

Benefits:

• High reliability;
• Acceptable cost;
• Self-diagnosis with display of all errors;
• Built-in frost protection;
• The design has a 6-liter expansion tank;
• Several programmable timers.

Disadvantages:

• Large overall dimensions;
• Some sensors fail quickly.

9. Haier Falco L1P20-F21 (T)

A double-circuit design, equipped with a bithermal heat exchanger, the unit is allowed to be installed both in houses and in apartments. The device is characterized by the presence of several degrees of protection: it has a flame breakout protection system, the circulation pump is equipped with a jamming protection. The heat exchanger has a sensor that prevents overheating, excessive pressure, lack of draft.

The heat exchanger is made of copper, the burner is modulating, made of stainless steel, the hydraulic block is brass. The total power of the boiler is 20 kW, the temperature of the coolant is regulated in the range from 30 to 85 degrees, the heated area can reach 190 square meters, the volume of the expansion tank is 6 liters. The design has small dimensions - 700 * 400 * 320 mm. Combustion products from the closed chamber are removed by a metal fan through a coaxial chimney. The heating system pressure range is 0.3 to 6 bar.

Benefits:

• High quality bithermic heat exchanger;
• Small size;
• Acceptable cost;
• Large heated area;
• A whole set of protective systems;
• A powerful circulation pump that easily lifts the heat carrier to the level of the second floor.

Disadvantages:

• Not too convenient location of inlet and outlet pipes;
• The lack of Russian on the control display.

8. MORA-TOP Meteor

This boiler is distinguished by a fairly simple control system, equipped with a monochrome LCD screen and two knobs - one regulates the temperature of the coolant, the second is responsible for heating the water. During the production, all current safety requirements were taken into account: the device is equipped with a closed combustion chamber. The boiler can be installed in place by yourself - it has a low weight. The control unit is directly connected to all connected elements: signals from pressure sensors, temperature sensors, volume of passing water, conventional and emergency thermostats and many others come to it.

Depending on the information received, the control unit increases or decreases the supplied gas amount. The device is distinguished by excellent economy, as it consumes just as much fuel as is required at the moment. The boiler efficiency is about 91%. The water is heated quite quickly - in just a few seconds. The design includes a protective system that does not allow the burner to turn on and off too often.

Benefits:

• Easy to operate;
• Emits a minimum amount of noise during operation;
• The set includes a room thermostat;
• Heat exchanger overheating protection;
• Withstands voltage drops well;
• Convenient in service;
• It emits a minimum of harmful substances into the environment.

Disadvantages:

• When connecting to the mains, it is imperative to equip grounding;
• The capacity of the circulation pump may not be enough for the second floor.

7. Buderus Logamax U072-12K

This boiler is distinguished by a closed combustion chamber, is perfect for any heating system of a private house, and has very convenient control. It looks very attractive. The body is made of thin sheet stainless steel, the assembly is reliable, there are no backlashes at all. Initially, the device was designed exclusively for complex climatic conditions.

The control system is based on the Open Therm protocol: it is very reliable, it exactly meets all the user's requirements, the setting is fine, up to a degree, which cannot but affect the device's economy. Domestic needs are more than covered - one such boiler is enough to create a heating system in a house with an area of \u200b\u200babout 120 square meters. Double-circuit boiler, flow type, per minute produces about 12 liters of water - this is quite enough for a family of three to four people or three water distribution points.

Benefits:

• Small overall dimensions;
• Light weight;
• Perfectly withstands significant voltage drops: up to 30% up or down;
• Does not decay when the gas supply decreases;
• Has an anti-freeze system;
• Virtually no noise during operation;
• Piezo ignition;
• The size of the flame is regulated by an ionization electrode;
• Well suited to the Russian climate.

Disadvantages:

• The exhaust fan quickly fails;
• The pump power is often insufficient if there is a second floor;
• Flimsy feed faucet.

6. Viessman Vitopend 100

This design is chimney and turbocharged. The first is allowed to be connected to a central chimney, which creates a natural draft for the removal of combustion products. The turbocharged device is designed for indoor installation where there are no special exhaust systems. All waste is removed from the building by a special fan.

The boiler body is made of reliable stainless steel, the assembly is reliable, there is no backlash. Equipment power ranges from 10.7 to 23 kW. The heating system can generate a pressure of 3 bar. Inside the boiler there is an expansion tank with a volume of 6 liters. The coolant warms up to a temperature of 85 degrees, hot water - up to 57 degrees. DHW productivity is no more than 11 liters per minute, depending on the temperature.

On the front panel there is a liquid crystal display, a power button, a pressure gauge and two levers responsible for the temperature of the coolant and water. An optional room thermostat can be purchased to make the unit easier to operate.

Benefits:

• Made exclusively from high quality materials;
• Does not make noise during operation;
• Small overall dimensions;
• Only modern technologies are used in production.

Disadvantages:

• Great cost;
• High price for components and spare parts;
• Hydraulic tubing is made of composite materials, which can quickly fail.

5. Navien DELUXE 16A White

This is a fairly good wall-mounted boiler, which is characterized by high-quality assembly and a long period of operation. The device is of a double-circuit type, it withstands low temperatures well, largely due to the presence of an anti-freeze system. The circulation pump automatically turns on when the room temperature drops to 10 degrees and begins to intensively distill the coolant, preventing it from freezing. When the water temperature in the system drops to 6 degrees, the burner turns on, increasing this indicator to 21 degrees.

Gas is consumed quite economically, which has a positive effect on the service life of the heat exchanger and the boiler itself. The device is able to work even with a minimum gas pressure of 4 mbar. The unit can withstand serious voltage drops in the network, it works stably when the water pressure in the system drops. The set comes with a remote control, there is also a voice assistant. Under the front panel there is a control unit equipped with a digital monochrome display.

Benefits:

• Withstands drops in water, gas and voltage;
• Acceptable cost;
• Convenient control using a remote control or a block on the panel.

Disadvantages:

• In some cases, the automation fails;
• Weak pressure of hot water;
• Makes a lot of noise during operation;
• There is no automatic diagnostic system for the device.

4. Bosch Gaz 6000 W WBN 6000-24 C

Designed to heat a room with an area of \u200b\u200bup to 240 square meters, the boiler is equipped with a closed combustion chamber, a plate-type heat exchanger. It is capable of delivering about 11.5 liters of hot water per minute, combustion products are discharged outside the room using a coaxial chimney with a diameter of 60/100 mm.

The control unit has sensors that monitor the magnitude of the flame, which are responsible for automatic ignition, fan speed. The boiler is also equipped with a three-stage pump and a 6.5 liter expansion tank.

The case is rectangular, on the front side there is a control panel equipped with a liquid crystal display, a pressure gauge showing the pressure in the heating system, and several adjustment buttons. All pipes for connecting communications are located at the bottom, which ensures ease of installation.

Benefits:

• Warms up the room air quickly;
• Easy installation;
• High efficiency, low gas consumption;
• A large number of individual settings;
• There is a piezo ignition.

Disadvantages:

• Sometimes it gives atypical errors - to eliminate them, it is enough to disconnect the boiler from the network for a couple of minutes;
• The circulation pump vibrates strongly during operation;
• Condensation sometimes forms in the tubes of the differential relay.

3. NAVIEN Ace-24A Atmo

This is a wall-mounted boiler for a house or apartment, which is perfect for even the most severe climatic conditions. It has good efficiency indicators, is able to serve for quite a long time, easily withstands low pressure of water, gas, and ensures stable operation even with significant voltage drops.

Despite all these positive traits, the device is not too expensive. The assembly of the boiler is reliable, there is a heat exchanger with good speed, due to which the supply of hot water occurs literally a few minutes after the boiler is turned on.

The branch pipes are located on the sides of the body, so the piping can be done both on the left and on the right, due to which installation is carried out even in rather tight conditions. The new generation gas burner ensures quiet boiler operation.

Benefits:

• Good level of security;
• Small overall dimensions;
• Easy to use
• Acceptable price.

Disadvantages:

• The circulation pump makes a little noise, otherwise the boiler is perfect.

2. Baxi MAIN 5 24 F

High quality Italian equipment, which rightfully ranks third in our ranking of the best wall-mounted gas boilers. It is a double-circuit mounted type boiler, equipped with a closed combustion chamber, turbocharged. The equipment is designed to be connected either to a coaxial chimney or to a two-pipe flue system. The device consists of a gas burner, the nozzles of which are made of stainless steel, a bithermal heat exchanger.

Grundfos circulating pump, equipped with an automatic air vent, electronic automation is concentrated on a special board. The volume of the expansion tank is 6 liters. In addition, the boiler is equipped with several sensors: heating, hot water, draft, flame level. The maximum power of the unit at the highest loads is 24 kW, it is designed for reliable heating of a house with an area of \u200b\u200bup to 220 square meters. It has small dimensions - 700 * 400 * 280 mm.

For ease of control, the boiler is equipped with a liquid crystal monochrome display and several buttons responsible for adjusting the temperature of the coolant and hot water, an automatic equipment diagnostic system is provided, when errors are detected, their codes are displayed.

Benefits:

• All the necessary functions are provided;
• Small size;
• Acceptable cost;
• A large number of service centers.

Date of the last update of the article: 11.01.2019

For heating private houses, it is most profitable 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 experts. If you decide to install in the house gas heating, then an overview of the devices presented below will help you navigate the variety of gas boilers.

Gas boilers are divided into two types.

Convection

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

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, the formation of soot, as well as shorten the life of the device.

To prevent this from happening, as well as for a 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 the vapors of carbon monoxide cool down to the formation of condensate, 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 more bulky and is usually installed in a separate room. The cost of the device is two times more than 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 there are, 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. After all, this is a piece goods, bought once and forgotten for a long time.

Which manufacturers' 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 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 of the rest of the companies in the European market, which speaks of quality, reliability and popularity.
• Bosch. This brand does not need advertising, it has long been a recognized leader in the production of technology.
• STS and Bentone. Swiss companies. They have expensive products, but very high quality.
• Ariston, Beretta, Lamborgini and Ferroli. Italians have firmly occupied the middle price segment. Their products are good value for money.
• Dakon. The Czech manufacturer produces budget models. German high-quality components, modern automation systems, as well as careful quality control are used here.

Just don't think that Russian companies do not produce quality products. By purchasing equipment from domestic manufacturers, the user can count on low cost, reliability and durability, high productivity, as well as the availability of components and good service.

• Zhukovsky Machine-Building Plant. Manufacturing heating equipment for over 40 years. Some boilers use imported automation. None of the models are mains-independent. Efficiency - up to 92%. High degree of reliability and long service life.
• Borinskoe. This plant has been dealing with boilers for more than two decades. Almost all models are equipped with high-quality foreign automation, non-volatile, have a relatively modern design and affordable cost.
• Lemax. The Taganrog plant offers gas boilers with a special coating of heat exchangers that protects against corrosion. Models are also available 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 devices

To choose the best gas boiler for heating a private house, we recommend that you carefully familiarize yourself with 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. The copper heat exchanger has good thermal conductivity, which increases the working efficiency.

Convenient and understandable control is carried out using the electronic panel. The user only has 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.

Disadvantages:

• few functions;
• there are no clear instructions for setting up hot water, you have to experiment with the poke method;
• too small expansion tank;
• the turbine is making noise.

Gas boiler Oasis RT-20 20 kW double-circuit

11th place. Protherm Bear 30 PLO

Excellent floor standing gas boiler for private houses. It works to provide heating, and together with a boiler - also for hot water supply. Ignited with a piezoelectric element.

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

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

What are users saying?

Advantages:

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

Disadvantages:

• the turbo nozzle is very noisy;
• the boiler decays 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 a given DHW temperature. Thanks to this, you will not have problems with adjusting the tap water.

With the help of a room thermostat, the boiler automatically regulates heating depending on the weather outside. The coaxial chimney is not subject to frost.

it perfect solution for those who need comfortable hot water supply and stable high-quality heating of the premises.

What are users saying?

Advantages:

• reliable and stable work;
• there is always hot water in the shower;
• high quality level;
• it is possible to connect "warm floors".

Disadvantages:

• sophisticated remote control. I had to deal with the remote control for a long time;
• i would like more hot water;
• expensive pleasure;
• weak pneumorel.

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

9th place. MORA-TOP Meteor Plus PK24KT

The reliable and safe boiler runs completely silent. 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 simple and intuitive controls. Layered protection provides security.

What are users saying?

Advantages:

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

Disadvantages:

• not cheap;
• after switching off the gas, the boiler is switched on manually.

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

8th place. Oasis BM-18

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

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.

The warranty is 2 years.

What are users saying?

Advantages:

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

Disadvantages:

• no remote control;
• ignition from batteries.

Gas boiler Oasis BM-18 18 kW double-circuit

7th place. Lemax Premium-20

The boiler body is made of high quality 2mm steel and meets all the required standards. The heat exchanger is cylindrical, which ensures stable operation at pressures up to three atmospheres.

The unit does not depend on electricity and is equipped with multi-level protection. The top panel is easy to remove, the boiler is easy to clean.

Product warranty - 3 years.

What are users saying?

Advantages:

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

Disadvantages:

• strains the steel heat exchanger, let's see how long it will last;
• heavy and cumbersome, it needs a separate room;
• makes noise;
• the automation is incomplete.

Gas boiler Lemax Premium-20 20 kW single-circuit

6th place. Baxi LUNA-3 COMFORT 310 Fi

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

The boiler pleases with its high efficiency - over 93%, which speaks not only of efficient operation, but also of efficiency. A pleasant feature is the ability to work in a wide range of pressure, 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.

Disadvantages:

• display backlight goes into "sleep mode", inconvenient;
• no hot water circulation;
• the pressure sensor is inconveniently located;
• weak point - fan and pneumorel;
• lPG injectors 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 pushing out famous brands from the market. Excellent quality and no flaws. When correct 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;
• easily connects to the heating system;
• italian automation.

Disadvantages:

• 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 operate and easy to use. The boiler can be hung on the wall in any room - kitchen, attic, basement.

On the positive side, a chimney designed during construction is not required, so the unit can be used in apartments with autonomous heating.

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

The service life is at least 12 years.

What are users saying?

Advantages:

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

Disadvantages:

• you definitely need a water filter;
• boiling water flows immediately;
• the ignition is powered by batteries, they often have to be changed;
• low-quality automation;
• a one-time questionable item.

Gas boiler Oasis BM-20 20 kW double-circuit

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

The wall-hung gas boiler is able to provide a high level of thermal comfort and constant hot water availability. It has a pleasant appearance, is hung on the wall and does not take up useful space. The front panel contains control buttons and instructions for the user.

Designed for heating an area of \u200b\u200bat least 120 square meters. Unpretentious to pressure and voltage drops. 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 a high performance.

What are users saying?

Advantages:

• compact;
• fit well into the interior;
• silent;
• economical;
• many precise settings;
• you can configure yourself using the Internet.

Disadvantages:

• chinese assembly, continuous 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 set of features is beyond praise. Can be connected to the "warm floor" system.

The combustion chamber is turbocharged. There are seven degrees 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;
• medium price category;
• fully adapted to Russian conditions;
• summer / winter mode.

Disadvantages:

• 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 water heating.

A feature of this model is a "hot start" - when you open a tap with hot water, you do not need to wait until 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.

Disadvantages:

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

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

What characteristics should you pay attention to

In order to correctly and competently select a gas boiler, pay attention to the following criteria.

• Power.The most important parameter. It completely depends on the area of \u200b\u200bthe 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 equal to 1-1.2 kW, in the south - 0.7-0.9 kW, in the north - 2 kW. To calculate the power of the boiler for a house with an area of \u200b\u200b300 m² in a temperate climate, you need to carry out the following calculations: 300 * 1/10 \u003d 30 kW.
• Installation method. There are wall and floor boilers. The first ones are compact, do not take up much space, are quiet and affordable. The latter are more powerful, cumbersome, and often require a separate room for their installation.
• The number of contours.Single-circuit devices are intended only for heating, double-circuit devices also provide hot water supply.
• Safety.It is desirable that the boiler can automatically shut down in all abnormal and emergency situations.

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

• Be responsible for calculating the power. If it is not enough, then the room will heat up for a long time and quickly cool down. 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 floor standing boiler with natural draft will not work for you. Better opt for wall-mounted forced draft boilers.
• Do you already have hot water? Then you should not spend money on a double-circuit boiler.
• A biometric heat exchanger needs 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 the 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 you correctly calculate the power and advise which boilers are suitable for heating your room.

Master of Architecture, graduated from the Samara State University of Architecture and Civil Engineering. 11 years of experience in design and construction.

To understand the operation of gas boilers, it is necessary first of all to study the structure of these devices. They usually consist of the following parts:

• Burner. With its help, the heat exchanger is heated.
• Heat exchanger. Designed to transfer heat to the coolant circulating through the home heating system.
• Control system. Required for power regulation and process control.
• Combustion product removal device.

The operation of a gas boiler resembles the operation of a conventional gas stove, when the combustion of natural or liquefied fuel heats a container with water. In a heating boiler, water is heated through a heat exchanger. Hot water circulates through pipes, entering the heating radiators and giving off heat energy to the rooms, as a result of which the house is heated.

The control system allows you to adjust the required power to create a comfortable microclimate by reducing or increasing the gas combustion flame.

What to look for when choosing

It is best to select a device for home use with a professional who has experience in installing these units. When choosing on your own, you should pay attention to the following main characteristics.

Location type

If it is possible to allocate a separate area for boiler room equipment, it is best to choose a floor-standing boiler. These machines are affordable and easy to use. Floor standing boilers are often equipped with reliable cast iron heat exchangers, since weight in this case does not really matter.

The limited space makes it necessary to purchase wall mounted boilers. Modern models of such boilers are made in the form of rectangular or square devices with small dimensions.

Parapet boilers, which also belong to wall-mounted products, are more expensive, but they are non-volatile and smokeless, which is important to ensure a normal microclimate in the house.

Number of contours

If the device is purchased exclusively for organizing heating in the house or only for hot water supply, it will be enough to purchase a single-circuit model. If you want to combine both functions in one device, it is recommended to use two-circuit type devices.

Single-circuit devices can be supplied with boilers in which water is heated for hot water supply, but in such a situation the load on the device increases significantly, which leads to rapid wear of the main elements.

Heat exchanger type

The service life and quality of the heat exchanger depends on the material from which it is made. Cast iron are considered the most reliable - they are durable and perfectly cope with temperature loads.

Copper heat exchangers are also highly resistant to high temperatures and are easy to repair if leaks are found. Steel products serve much less than cast-iron heat exchangers - they quickly become slagged, as a result of which they are subject to frequent replacement.

In dual-circuit devices, double or separate heat exchangers are used. The best solution would be to choose a device with separate elements, which, due to this, will last much longer.

Combustion chamber and type of ignition

The type of combustion chamber depends on the type of oxygen supply to the apparatus. In open-type chambers, oxygen is supplied from the room in which the apparatus is located, and an artificial flow of oxygen is organized into the closed chambers.

To organize heating of a city apartment, it is better to purchase boilers with closed turbo-type burners, since such devices are easy to install, equipped with a coaxial chimney and have high efficiency.

Boilers with an open combustion chamber are installed in separate boiler rooms with the obligatory organization of a chimney, which will provide the necessary draft.

To ignite the gas in the burner, use piezo or electric ignition. With frequent problems with the supply of electricity, a system based on piezoelectric elements will be more reliable, and in the absence of such problems, electric ignition is used.

Adjustability

Additional control functions allow more efficient use of fuel, increase boiler efficiency and maintain the required level of safety during the operation of the device.

In one-stage regulation, there is only one option for turning on and off the boiler, and when the device is equipped with a modulator, it becomes possible to smoothly adjust the intensity of gas combustion. Automatic adjustment takes place according to the specified parameters and can function without master control in an autonomous mode.

The safety of the boiler operation is ensured by pressure and combustion sensors, which send a signal to the control panel of the device, as a result of which the operation of the boiler is corrected or completely shut down in emergency situations.

Power

This characteristic allows you to determine the capabilities of the boiler to ensure sufficient heating of water in the heating system of a house or garage and the organization of hot water supply. Manufacturers indicate the power in kW in the instructions, and often recommend the size of the area that this device can heat.

In devices made for heating the coolant at home, power values \u200b\u200bcan vary from 8 to 40 kW.

How to determine the required power

An accurate calculation of the required boiler power for a particular room can only be made by a specialist, but there are approximate consumption rates for one square meter living space.

For areas of central Russia, it is 1 kW per 10 m 2, for areas with long winters and low temperatures, it is recommended to take into account 1.5 kW for the same area, and for warm climatic zones, 0.8 kW is enough.

A coefficient of 10-20% should be added to the value obtained by calculation, which will compensate for the need for heat in case of abnormal changes in the weather in a given area.

Popular manufacturers, models and prices

In the rating of gas boilers for heating a private house, mainly foreign brands have established themselves. The most reliable products are manufactured by the German concerns Wolf, Vaillant, Bosch and Buderus, the Italian plant BAXI, the Slovenian company Protherm and the manufacturer from South Korea Navien. Cheaper, but also high-quality devices are produced by Zhukovsky MZ and the Concord enterprise.

The best floor standing boilers

The highest quality brands of single-circuit floor-standing devices include:

It is considered the most economical device. Power 30 kW, open combustion chamber. The heat exchanger is made of cast iron, the unit is equipped with an automatic system for adjusting to weather conditions. Intermittent ignition. Pros: compact size, attractive design, durability. Cons: high price (from 120 thousand rubles).

Power 25 kW, open combustion chamber. To ensure hot water supply, an additional boiler is required. Open-type atmospheric burner, electric ignition, automation allows you to smoothly change the power.

Display showing basic operating parameters, cooling circuit. Easy assembly, as this model is delivered from production ready for use. Pros: compactness, easy installation, reliability. Cons: No remote control included. Cost from 52 thousand rubles.

The best models of floor standing capacitor units include:

Power 34 kW, the ability to combine with external equipment for the organization of hot water supply. Modeling burner, multi-touch control panel, digital analytics of parameters, electronic ignition, built-in flame control.

Pros: economical gas consumption, attractive design, durability. Cons: high cost from 170 thousand rubles, the need to purchase a device to eliminate the consequences of power surges.

The best domestic models of floor standing boilers:

AOGV-23.2-3 Comfort N. This floor-standing device is equipped with piezoelectric ignition and automatic control, capable of functioning in forced and natural circulation systems of the heat carrier.

A relatively cheap boiler - the cost is from 25 thousand rubles. This model belongs to environmentally friendly devices. Pros: low cost, reliability, unpretentiousness, maintainability, energy independence.

The best wall-hung boilers

The best models of wall-mounted convection-type apparatus include:

A two-circuit unit with a closed-type combustion chamber and forced smoke extraction. Power from 10 to 25 kW, two heat exchangers, weight about 40 kg, the ability to generate hot water up to 12 l / min.

The device is capable of operating on both natural fuel and liquefied fuel. Pros: durability, easy installation. Cons: rather high cost (from 60 thousand rubles), but the quality of this gas heating boiler compensates for its cost.

The device is specially prepared for operation in the networks of the Russian Federation - this model is capable of functioning with pressure surges in the gas network. Digital control, the ability to consume different types of gas.

Pros: full adaptation to domestic conditions, uninterrupted operation during power surges, copper-bonded heat exchanger coating, the ability to connect equipment for organizing hot water supply, a unit protection system, an established system of warranty and post-warranty service. Cons: the cost is from 55,000 rubles, for the stable functioning of digital equipment you will need a stabilizer

The best models of wall-mounted condensing-type apparatus include:

Power 19 kW (there is a special function that allows you to increase the output up to 25 kW), low gas consumption, digital control, electronic ignition, the heat exchanger is made of stainless steel. Pros: modern design, reliability, compactness. Cons: tangible cost from 95 thousand rubles, the need to purchase a stabilizer.

The device is equipped with two heat exchangers, the material is stainless steel. This brand provides the ability to adapt to various operating conditions (variable pressure, fuel type). Pros: compactness, low cost from 52 thousand rubles, economy with good efficiency, durability. Cons: need to buy a stabilizer.

This review will allow you to determine which gas boiler is best for a particular situation, and will facilitate the selection of the appropriate model from the list of the most popular devices.

It is advisable to entrust the installation of a gas boiler for heating a private house to experienced installers. Independent work with sophisticated technology lead to unpredictable results and serious accidents.

The main task of the owner of a summer house or apartment is to prepare the premises for the installation of the unit. For a floor-standing boiler, a boiler room is required, the wall-mounted appliance is placed in a suitable place inside the house.

For installation of a floor-standing appliance, it is necessary to prepare a base with a height of 150 mm, ensuring free access to the boiler from all sides. For volatile devices, ground is provided.

Related Videos

A heating gas boiler is a device that uses the combustion of fuel (natural or liquefied gas) to heat the coolant.

The device (design) of a gas boiler: burner, heat exchanger, heat-insulated housing, hydraulic block, as well as safety and control devices. Such gas boilers require a chimney to be connected to remove the combustion products. The chimney can be either a conventional vertical or coaxial ("pipe in pipe") for boilers with a closed combustion chamber. Many modern boilers are equipped with built-in pumps for forced water circulation.

The principle of operation of a gas boiler - the coolant, passing through the heat exchanger, heats up and then circulates through the heating system, giving off the received thermal energy through radiators, heated floors, heated towel rails, as well as providing water heating in an indirect heating boiler (if it is connected to a gas boiler).

A heat exchanger is a metal container in which a coolant (water or antifreeze) is heated - it can be made of steel, cast iron, copper, etc. The reliability and durability of a gas boiler depend on the quality of the heat exchanger in the first place. Cast iron heat exchangers are corrosion resistant and have a long service life, but are sensitive to sudden temperature changes and are heavy. Steel containers can suffer from rust, therefore their inner surfaces are protected with various anti-corrosion coatings, which ensure the prolongation of the "life" of the device. Steel heat exchangers are the most common in boiler manufacturing. Corrosion is not terrible for copper heat exchangers, and due to their high heat transfer coefficient, low weight and dimensions, such heat exchangers are often used in wall-mounted boilers, but of the minuses, it should be noted that they are more expensive than steel ones.
In addition to the heat exchanger, an important part of gas boilers is the burner, which can be different types: atmospheric or ventilated, single-stage or two-stage, smooth modulation, double.

To control the gas boiler, automation is used with various settings and functions (for example, a weather-dependent control system), as well as devices for programming the operation and remote control of the boiler.

The main technical characteristics of gas heating boilers are: power, number of heating circuits, type of fuel., Type of combustion chamber, type of burner, installation method, presence of a pump and expansion tank, boiler control automation.

To determine required power gas heating boiler for private country house or an apartment, a simple formula is used - 1 kW of boiler power to heat 10 m 2 of a well-insulated room with a ceiling height of up to 3 m. If heating of a basement, a glazed winter garden, rooms with non-standard ceilings, etc. is required. the capacity of the gas boiler must be increased. It is also necessary to increase the power (about 20-50%) when providing a gas boiler and hot water supply (especially if it is necessary to heat the water in the pool).

The peculiarity of calculating the power for gas boilers: the nominal gas pressure at which the boiler operates at 100% of the capacity declared by the manufacturer, for most boilers is from 13 to 20 mbar, and the actual pressure in gas networks in Russia can be 10 mbar, and sometimes even lower ... Accordingly, a gas boiler often works only at 2/3 of its capabilities and this must be taken into account when calculating. In more detail, with the table for calculating the power of the heating boiler, you can

Most gas boilers can be transfer from work from natural gas to liquefied gas (bottled propane). Many models switch to liquefied gas by the factory (when purchasing, specify these model characteristics), or nozzles (nozzles) are additionally supplied to the gas boiler to switch to bottled gas.

Pros and cons of gas boilers:

Boiler piping - these are devices for the full operation of the heating and water supply system. It includes: pumps, expansion tanks, filters (if necessary), manifolds, check and safety valves, air valves, valves, etc. You will also need to purchase radiators, connecting pipes and valves, thermostats, a boiler, etc. The question of choosing a boiler is quite serious, so it is better to entrust the selection of equipment and its complete set to professionals.

What is the best boiler? The Russian market for gas boiler equipment has its own leaders in quality and reliability. The best manufacturers and brands of gas boilers are presented in the range:

"Premium class" or "Lux" - the most reliable and durable, easy to operate, the kit is assembled as a "constructor", more expensive than others. These manufacturers include German companies