Which gas boiler is better to use - an overview of the types and models of equipment. Which gas boiler is better for heating the house The best boilers for the house

Evgeny Sedov

When hands grow from the right place, life is more fun :)

Content

Today, there are many options for heating equipment for residential premises. Economical gas boilers for heating a private house have become very popular. Thanks to the large selection of such devices, each buyer can find a model for himself in accordance with personal preferences and a certain budget. The installation of such equipment will save on fuel costs, because natural gas is relatively cheap. Additionally, a gas boiler does not require frequent maintenance, like an oil or wood boiler.

What is a gas boiler

This is a device used to obtain thermal energy, for the purpose of heating premises for various purposes and heating water for household and other purposes by means of gas combustion. Such boilers are widely used for domestic purposes, for example, for heating a private house. You can order a heating boiler for a private house in a specialized online store with delivery by mail to Moscow, St. Petersburg or another city in the country. Remember that gas is a fire and explosive fuel, so it is important to follow safety precautions.

The principle of operation of a gas boiler is that when fuel is supplied to the device, piezoelectric ignition is turned on. The spark ignites the igniter later. Fuel supply to the burner when the igniter is not lit is unacceptable, because the gas may explode. The igniter ignites the main heating pad, which heats the coolant in the boiler to the temperature set by the thermostat. When the desired parameter is reached, the automatic equipment turns off the burner. When the temperature in the device drops, the temperature sensor gives a command to the valve to supply fuel, and the burner ignites again. Classification:

• by location: floor and wall;
• by functionality: single and double-circuit;
• by type of traction: natural and forced;
• by type of ignition: with piezo ignition and with electronic ignition;
• by the completeness of the use of fuel energy: convection (traditional) and condensation.

How to choose a gas boiler for heating a private house

To buy the best gas boiler for heating a private house, you need to consider several important criteria. The choice of a suitable device depends on the total area of ​​the heated room, the need for heating hot water and the number of its consumers, the presence of a chimney and the pressure in the gas pipeline. Additionally, you need to take into account the presence of insulation on the walls. Browse online catalogs with photos, take into account the following tips:

• Wall mounted or floor standing gas boiler. The choice of equipment for heating a private house must begin with the selection of a place for its installation. If you have space for a separate boiler room, then you can choose a floor device, otherwise limit yourself to a wall modification. A floor-standing boiler is often made on the basis of a reliable cast-iron heat exchanger - such a model has a solid safety margin, it is unpretentious and does not cause problems in operation. The outdoor equipment for private houses has a high power. The wall-mounted analogue is compact - it is ideal for heating a small object.
• Single-circuit or double-circuit equipment. For heating a private house, equipment with a single circuit is widely used. It has a very simple device - it has a heating pad and one heat exchanger. The two-circuit modification combines a boiler and a gas flowing water heater. Its device is more complex, but at the same time it is more functional and easier to install.
• With natural ventilation or forced. In the first case, the hood passes through the chimneys available in the house, in the second, the unit has built-in fans that remove exhaust gases from the boiler and bring them out.
• With an open or closed combustion chamber. In order for the choice of a gas boiler for a private house to be optimal, pay attention to the type of combustion chamber. The open chamber model is often referred to as "atmospheric" because air flows to the burners by gravity directly from the room. The combustion products are removed through the chimney with natural draft. This option has a simple design and low noise level. The turbocharged gas boiler for heating private houses has a closed combustion chamber and fans for fume extraction and air intake. It requires electricity to operate. It is distinguished by its complex structure and high noise level.
• Heat exchanger material. This element can be cast iron or steel. The first option is more durable, because not subject to corrosion, but more fragile. The newer models use gray cast iron, which makes them stronger and less brittle. A steel heat exchanger is lighter, but corrosive.
• Pressurized or atmospheric burner. The first unit is characterized by high efficiency, good power, but expensive. The second option is more affordable in terms of cost, but low-power. The forced draft burner must be purchased separately, and the atmospheric burner is included in the package of the gas boiler.
• Convection or condensation model. Gas boilers for heating a private house are often built according to a convection scheme. In this case, the burner generates heat energy, and the heat exchanger takes the received heat, which is sent to the system - its remains go outside. The efficiency of such devices is 90-93%. For condensing units, it is slightly higher. The scheme of their work is as follows: almost all the generated heat is taken into the heating system, as a result of which condensate appears, which is sent to the drainage.
• Piezo ignition or electrical ignition of the burner. In the first case, the ignition process is manual, in the second - automatic.
• Assess the safety of operation. Many modern gas heating boilers are equipped with sensors that monitor the operation of the unit at all stages - from the supply of water and gas to the output of exhaust gases to the outside. They are capable of blocking the heating system if the electricity is suddenly cut off or blocking the boiler if the temperature has exceeded the set norm. For such sensors, the constant availability of electricity is important. There are floor-standing installations, the sensors of which operate in a mechanical mode, regardless of the power supply.
• Calculate the power. To heat 10 m2 of living space in the domestic climate, you need about 1 kW of thermal energy. In the Far Eastern and northern regions, this figure increases to 1.2-1.5 kW, in the southern - it ranges from 0.8 kW. Do not forget about the reserve, which is necessary in case of excessively cold winters and the presence of heat losses. It is usually 10-20%.

Types of gas heating boilers for a private house

Manufacturers of heating equipment offer a choice of a wide range of single and double-circuit gas boilers with both open and closed combustion chambers. At the same time, there are also non-volatile devices on sale. In the absence of a gas pipeline, you can give preference to autonomous heating of the house on liquefied gas. Many models are equipped with a circulation pump to increase efficiency (especially with low gas pressure in the system). Models of brands often fall into the rating of heating boilers for a private house:

• Bosch;
• Protherm;
• ATON;
• Leberg;
• Buderus.

Bosch

The Bosch Gaz 6000 W WBN 6000-24 С boiler for heating a private house operates from both natural and liquefied gas. The device is equipped with several connection nozzles, self-diagnostics, overheating protection, air vent and pump blocking protection. Additionally, there is a frost prevention mode and a small display on which basic information is displayed. More about parameters:

• model name: Bosch Gaz 6000 W WBN 6000-24 С;
• price: 27280 rubles;
• characteristics: circuits - 2, installation - wall-mounted, control - electronic, combustion chamber - closed, power - 7.2-24 kW, mains voltage - single-phase, expansion tank - 8 l, medium temperature - 40-82 ° С, natural consumption gas - 2.8 m3 / h, liquefied - 2 kg / h, functions - pressure gauge, thermometer, auto-ignition, flame modulation, power indicator, dimensions - 40x70x29.9 cm, weight - 32 kg;
• pluses: build quality, versatility;
• cons: inconvenient control.

Floor-standing version of a gas boiler from Bosch - Gaz 2500 F 30. The model has power modulation, LCD display, as well as the functions of thermal disinfection and frost protection:

• model name: Bosch Gaz 2500 F 30;
• price: 55,000 rubles;
• characteristics: installation type - floor-standing, power - 30 kW, circuits - 1, combustion chamber - open, water volume in the boiler - 107 l, efficiency - 92%, heat exchanger material - steel, protection (degree) - IPX4D, heating system t 55-90 ° С, dimensions - 109.2x58.9x87.7 cm, weight - 137 kg;
• pluses: functional, powerful, adapted to Russian operating conditions;
• cons: overpriced.

Protherm

Floor-standing steel gas boiler Protherm Wolf 12 KSO is only suitable for heating. The model is intended for a system with natural circulation of the heat carrier. The device is electrically independent. Suitable for installation in a residential building, country house and industrial premises. There is an atmospheric burner made of steel (stainless), flame control, overheating protection, chimney draft control and indication of the temperature and pressure of the coolant pressure:

• model name: Protherm Wolf 12 KSO;
• price: 16968 rubles;
• characteristics: type - atmospheric, installation - floor-standing, power - 12.5 kW, combustion chamber - open, circuits - 1, efficiency - 92.5%, fuel - main gas, type of ignition - piezo ignition, dimensions - 74.5x46x39 cm, weight - 46.5 kg;
• pluses: low cost, electronic dependence, there are necessary functions;
• cons: low power.

The floor-standing modification of the gas boiler Protherm Medved 20 PLO is an excellent solution for both heating a private house and heating hot water. There is protection against overheating, control of draft in the chimney and the presence of a flame:

• model name: Protherm Bear 20 PLO;
• price: 44645 rubles;
• characteristics: type - atmospheric, installation - floor-standing, power - 17 kW, combustion chamber - open, circuits - 1, operating mode - "Winter-Summer", heat exchanger material - cast iron, ignition type - piezo ignition, dimensions - 88x33.5x60 cm, weight - 90 kg;
• pluses: ease of installation, maintenance, build quality;
• cons: low power for such a price.

ATON

The modern Aton Atmo 8E economy class unit is suitable for the conditions of natural circulation of the coolant, so that it does not have to be connected to the power supply. Built-in automation regulates the water temperature. The pilot burner is started by piezo ignition. The equipment is equipped with a draft sensor and a gas valve. Exhaust occurs naturally. Options:

• model name: ATON Atmo 8E;
• price: 13882 rubles;
• characteristics: installation - floor-standing, circuits - 1, combustion chamber - open, power - 8 kW, efficiency - 90%, temperature control range - 50-90 ° С, dimensions - 75.4x26.4x56.6 cm, weight - 39 kg ;
• pluses: low cost, simple and reliable design;
• cons: low-power.

ATON Atmo 20E will be an alternative acquisition. The equipment is equipped with a thermometer, gas control and overheating protection:

• model name: ATON Atmo 20E;
• price: 24,300 rubles;
• characteristics: type - convection, installation - floor-standing, circuits - 1, power - up to 20 kW, combustion chamber - open, efficiency - 90%, control - mechanical, heat exchanger - steel, heat carrier t - 50-90 ° С, dimensions - 40x96x70 cm, weight - 81 kg;
• pluses: good build, optimal functionality;
• cons: no.

The Leberg Flamme 20 ASF double-circuit gas boiler with a bithermal heat exchanger is perfect for heating a private house. The efficiency of the device reaches 91.6%. Temperature information is shown on the display. There is a possibility of connecting a warm floor. The equipment is equipped with a pressure gauge, thermometer, auto-ignition, flame modulation and overheating protection. Additionally, there is a self-diagnosis and an anti-freeze mode:

• model name: Leberg Flamme 20 ASF;
• price: 33,200 rubles;
• characteristics: type - convection, installation - wall-mounted, control - electronic, combustion chamber - closed, power - up to 20 kW, circuits - 2, coolant temperature - 30-80 ° С, there is a circulation pump and expansion tank, dimensions - 41x74x31.5 cm, weight - 37.8 kg;
• pluses: excellent set of functions, complete set, good performance;
• cons: not the most affordable price.

Flamme 24 ASD from Leberg is a double-circuit gas equipment with an integrated expansion tank and a circulation pump. It has protection against pump blocking, overheating, auto-ignition and a set of other equally important functions:

• model name: Flamme 24 ASD from Leberg;
• price: 35,700 rubles;
• characteristics: type - convection, installation - wall-mounted, control - electronic, combustion chamber - closed, power - up to 20 kW, efficiency - 96.1%, circuits - 2, coolant temperature - 30-85 ° С, dimensions - 41x74x26.5 cm, weight - 37.8 kg;
• pluses: high-performance, multifunctional;
• cons: expensive.

Buderus

Wall mounted gas equipment Logamax U052-24K from Buderus is a reliable modern boiler that is suitable for heating large rooms up to 240 m2. The device has a bithermal copper heat exchanger, electronic ignition and a weather-dependent mode. The control system is capable of supplying boiler water to 4 heating circuits (independent). Maintenance and installation will not cause problems, more details about the parameters:

• model name: Buderus Logamax U052-24K;
• price: 55858 rubles;
• characteristics: type - convection, installation - wall-mounted, supply phases - 1, circuits - 2, fuel - liquefied and natural gas, combustion chamber - closed, expansion tank (volume) - 8 l, power - up to 26.2 kW, efficiency - 90-92%, weight (gross) - 42.3 kg;
• pluses: powerful, easy to maintain, large expansion tank;
• cons: it is expensive, efficiency is lower than that of analogs.

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

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

In our rating you will find 15 of the best and highest quality gas boilers, the purchase of which will provide you with warmth and hot water for many years. Before that, we advise you to study some of the nuances of choosing a gas boiler for a house or apartment.

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

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

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

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

Heated power

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

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

There is one more important detail when choosing the boiler power. If you take a device that is too powerful for a small room (for example, a 24 kW boiler for a one-room apartment of 40 sq. M.), Then the boiler will quickly heat up the coolant and turn off. As soon as the water cools down, the boiler will start up again. Constant switching on and off will occur very often, which will lead to accelerated wear and increased gas consumption. In turn, a boiler with a lower power will provide a smooth combustion, and on-off will occur much less frequently.

Which company to give preference to?

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

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

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

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

After purchasing a gas boiler, it is advisable to install a voltage stabilizer. Especially if your network suffers from frequent power surges. The fact is that in the event of a boiler failure due to a power surge, it will not work to exchange the device under warranty. The requirement for the quality of the network is spelled out in each warranty agreement. Therefore, it is better to spend an extra 3-5 thousand rubles for a device with a capacity of up to 1 kW (and a powerful stabilizer for the boiler is not needed) than to end up losing tens of thousands of rubles.

Best inexpensive wall mounted gas boilers

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

3 Navien DELUXE 24K

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

Gas boiler Navien DELUXE 24K is maximum comfort at minimum cost. A double-circuit heat energy generator is used for sequential heating of premises with a total area of ​​up to 240 sq. M and for meeting domestic and household needs in hot water with a capacity of up to 13.8 l / min at t 35 ° C. A distinctive feature of the heater in the material of the primary heat exchanger is stainless steel. This fact slightly reduces the efficiency of the unit to 90.5%, but prolongs its durability due to the reliability of high-alloy steel.

Comfortable use of the hot water installation is ensured by a convenient display and clarity of instrumentation, an adapted room regulator with a remote control panel. The ease with which operative intervention is carried out in the cyclicity of the boiler operation can significantly reduce the consumption of blue fuel during operation.

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

2 Baxi MAIN 5 24 F

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

The gas boiler Baxi MAIN 5 24 F is an example of a double-circuit unit in the line of biothermal heating devices. An engineering solution that combined the heating circuit with the preparation of hot water for hot water supply in a single hydroelectric power plant made it possible to significantly reduce the cost of a wall-mounted unit in comparison with heat generators equipped with separate heat exchangers. At the same time, there was no significant decrease in performance indicators. The boiler has enough capacity to heat an area of ​​240 square meters and prepare 9.8 l / min hot water at t 35 ° C.

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

Customer reviews emphasize that the most popular options for a gas unit are the ability to connect external control: room regulators, weekly programmers and the provided interface with low-temperature heating circuits (underfloor heating).

Video review

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

1 Vaillant turboTEC pro VUW 242 / 5-3

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

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

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

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

The best floor-standing gas boilers from the budget category

Floor standing gas boilers are considered more reliable and durable. They cost more than wall-mounted models, but they gain in power and can heat rooms from 200 sq. m. For the installation of floor-standing boilers, it is recommended to use a separate room (boiler room).

3 Protherm Wolf 16 KSO

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

The non-volatile "floor stand" presented by the Slovak company "Proterm" is surprisingly small in size. At only 39 cm wide, almost 75 cm high and 46 cm deep, it can be easily installed in any small room. In the "Wolf" series, 2 modifications are presented, differing only in thermal power of 12.5 and 16 kW, sufficient for heating a private house with an area of ​​30 to 150 sq. m.

The fact that the main production site of Protherm is located at the Vaillant plant, the world-famous German manufacturer of gas boilers, will tell a lot about the quality of workmanship. Floor-standing units are made of steel 3 mm thick, equipped with temperature and emergency controllers, a draft stabilizer, and a SIT gas burner device (Italy). The design is easy to install and operate, and therefore does not cause complaints from users. However, it must be taken into account that the 2-year warranty for the unit applies if installed by a certified specialist.

2 ATON Atmo 30E

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

A powerful single-circuit boiler of Ukrainian origin, which has everything you need to ensure stable heating of premises up to 300 square meters. Actually, ATON Atmo 30E fulfills its main task beyond praise - the absence of a second circuit for heating water allowed Ukrainian craftsmen to pay more attention and funds to improve and fine-tune the heating function.

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

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

1 Lemax Premium-25B

The largest heating area at an affordable price
Country Russia
Average price: 27 360 rubles.
Rating (2019): 4.5

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

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

It is worth noting that the Lemax boiler is designed for an open heating system, therefore, when buying it, a chimney must be provided in the house for the removal of combustion products.

Most of the user reviews speak of Lemax's "indestructibility" and almost silent operation. It is an economical and hassle-free boiler at an affordable price, with a 3-year manufacturer's warranty. One of the best deals in the budget segment.

The best floor-standing gas boilers: price - quality

Here are the most optimal in terms of price and quality floor standing gas boilers. The most popular units among buyers.

3 Buderus Logano G124 WS-32

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

The "Logano" line includes 4 standard sizes (from 20 to 32 kW) of low-temperature boilers, which are considered more profitable and safer in comparison with high-temperature boilers. In addition, low temperatures in the heating system create the most comfortable conditions for a person, while excluding strong temperature drops in an apartment or a private cottage. The unit can be built into the heating system using underfloor heating, and if the heat loss at home is too high, it is possible to supplement it with radiators.

Additional heat savings are facilitated by the special design of the cast-iron heat exchanger and thermal insulation 80 mm thick. In order for buyers to individually assemble the heating device, the company offers an extensive selection of additional parts and assemblies, which, I must say, are very expensive. For example, the AW 50.2-Kombi flue gas control system is offered to be bought for almost 9.5 thousand rubles, and at least 50 thousand rubles will have to be paid for the Logalux SU floor-standing water heater. Nevertheless, consumers are satisfied with the economy, ease of operation and durability of the model and recommend it for purchase.

2 Navien GA 23KN

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

Last June, Navien Rus LLC was awarded the Company of the Year award in the Best Supplier of Engineering Equipment category. A month later, the company celebrated with a 3-day conference the sale in Russia of the millionth hinged boiler. In addition, over the past 4 years, the brand has gained 46.6% of the votes and has repeatedly confirmed the title of "Brand No. 1" in the category "Boilers for heating". What is remarkable about his products, that they vote for it not only by word, but also by wallet?

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

1 Baxi SLIM 2.300 Fi

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

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

Double-circuit "Baxi" is able to heat a cottage up to 300 sq. m. with an efficiency factor of 90%. It can work in a closed heating system due to the built-in circulation pump. The built-in expansion tank will maintain the optimal pressure in the heating system, accepting the excess during heating and replenishing the losses during cooling of the heat carrier. Baxi SLIM 2.300 Fi is one of the best boilers for underfloor heating.

The material of the primary heat exchanger is the best here - cast iron. As you know, cast iron is resistant to corrosion, durable and reliable. Additional functions include an air vent, safety valve and pump blockage protection.

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

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

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

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

3 Baxi POWER HT 1.450

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

Distinctive characteristics of the model are high power indicators of 45 kW, efficiency of 107.5% and the ability to maintain 100% power when the inlet pressure drops to 5 mbar. The device implements all modern protection methods, including protection against freezing, overheating, as well as gas control and a self-diagnosis system. The built-in microprocessor constantly monitors the status of the sensors and in the event of abnormal situations (for example, a drop in water pressure, overheating or cut off the gas supply) automatically turns off the boiler. It is also worth noting the presence of an auto-ignition, an air vent and the ability to connect a warm floor.

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

2 Baxi Duo-tec Compact 1.24

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

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

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

1 Protherm Lynx condensing

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

In Europe, traditional boilers are practically not used - they were replaced by condensing units like Protherm "Lynx". Models of this line have been produced since 2002 and are still in demand on the market. There are a lot of reasons for the popularity: here is also the affordability - mounted condensing boilers with similar characteristics from competitors are 1.5 times more expensive, and rich equipment, and still relevant design.

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

The best double-circuit boilers

When choosing a double-circuit boiler, as well as a single-circuit boiler, you need to pay special attention to power. If the residents of the house plan to take a bath often, the minimum power of the equipment should be at least 18 kW, if the shower is a priority, then it is allowed to install a less powerful unit - from 10 kW. Even before buying, it is advisable to check whether the manufacturer has skimped on the circulation pump, safety valve, diaphragm expansion tank and fittings in the kit.

3 Bosch Gaz 6000 W WBN 6000-18 С

Patented heat exchanger design. Low noise level
Country: Germany (produced in Russia)
Average price: 29 100 rubles.
Rating (2019): 4.5

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

Among other advantages of heating equipment, one should note the minimum noise level - the sound of a working boiler is compared by many users to the noise of a computer or refrigerator. Efficiency is another Bosch feature. It is proposed to provide it by switching on the "Eco" mode, which provides for heating water only when it is taken away. If the most flexible automatic regulation is required, it is possible to connect external regulators to the built-in automatics, allowing the system to be controlled remotely.

2 Ariston CARES X 15 FF NG

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

The Ariston CARES series are the most compact traditional and wall-mounted gas boilers. The 15-kilowatt tube is intended for installation in heating systems of small private houses, summer cottages and apartments, in the limited space of which its dimensions - 400x700x319 mm - take root very successfully. And it is very handy that the unit setting allows you to set the temperature of the heating circuit with an accuracy of 1 °, thereby providing an ideal microclimate in a small room.

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

1 Rinnai RB-207RMF

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

The Japanese are not in vain known as techno-freaks - they even managed to fill the Rinnai RB-207RMF gas boiler with the most modern electronics. What makes it unique is, first of all, the algorithm for automatically maintaining the optimal ratio of the gas-air mixture in the working chamber. The process is controlled by a “brain” with sensory sensors. This achieves an unprecedentedly wide range of output power - from 17 to 100% and, as a result, a decrease in gas consumption and an increase in the life of the primary heat exchanger.

The model can be controlled from the "Standard" modification panel (supplied in the basic kit), "Deluxe" or Wi-Fi. With its help, you can program an individual heating and hot water supply mode, which will be automatically maintained depending on the indicators of the sensors outside and inside the building. Changes in the settings are duplicated by the voice navigator. Two microprocessors are responsible for safety at once, controlling and correcting each other's work. This is not a boiler, but a space rocket, not otherwise!

Heating a room is one of the first questions that arises when building a house or production area. And also for those who do not want to depend on centralized heating. To achieve these goals, you should select a suitable boiler. Before giving preference to any model, you need to take into account the size of the heated areas, the need for hot water or connecting underfloor heating.

We have selected the top 10 best boilers based on customer feedback. This rating presents not expensive and advanced models that correspond to the price-quality ratio and are the most popular among users in 2018 - 2019.

10 Navien DELUXE 24K

Its small size (695x440x295 mm) and weight (28 kg) allow it to be placed even in a small apartment kitchen. A closed combustion chamber makes it possible to work without a special hood, and electric ignition will allow you to forget about matches.

The unit is protected from interruptions in voltage and pressure in the system with a special chip, which is triggered when there are deviations of 30% from the norm. Navien DELUXE 24K is designed to heat water at a rate of 13 l / min. Switching between the column and the boiler can be automatic or manual.

The remote control is fully Russified and facilitates control and configuration. An economical mode is provided, which can be turned on during the absence of the owners of the house to maintain heat. If necessary, all components are readily available in specialty stores.

Pros:

• Remote control.
• Operational reliability.
• Economical gas consumption.
• Rapid heating of the room.

Minuses:

• Manual regulation of the pressure in the system.
• A bit noisy.

9 Buderus Logamax U072-12K

The boiler is suitable for any premises due to its closed combustion chamber and compact dimensions. In it, you can set the type of smoke exhaust depending on the room (3 options are possible).

A set of safety devices will ensure reliability and safety. It is not sensitive to pressure and voltage drops in the network. Thanks to the built-in temperature sensor, the boiler is protected against frost. Stable combustion is ensured by the impulse tube.

Despite the low gas consumption, Buderus Logamax U072-12K provides high performance. The control unit with electronic display makes the setting more convenient and easier. It is not only easy to install and configure, but also easy to operate.

Pros:

• Easy installation and setup.
• Protective functions at a high level.
• Ease of maintenance.
• Quiet work.

Minuses:

• There is no weather-dependent automation.
• There is no possibility of connecting underfloor heating.

8 Baxi MAIN 5 24 F

Small size and classic white color allow you to hang the boiler even in the kitchen, without getting out of the general style. It quickly and quietly heats water and the room. The desired temperature can be set in the settings. But to turn on the heating, you need a sufficient water pressure. It has the ability to connect underfloor heating.

Baxi MAIN 5 24 F is very easy to operate thanks to its intuitive operation. It contains a display and buttons that will help you adjust and configure the desired mode.

The safety of the boiler is at a high level. Overheating, frost protection and pump blocking functions ensure trouble-free operation. And self-diagnosis will indicate an error in operation.

Pros:

• Multifunctional control.
• Economical fuel consumption.
• Doesn't take up much space.
• Self-diagnosis function.

Minuses:

• Doesn't work without light.
• With a low pressure, it does not turn on water heating.

7 Protherm Panther 25 KOO

Single-circuit gas boiler designed to be mounted on the wall. The boiler has the ability to connect a stationary boiler or underfloor heating. Thanks to the room thermostat, an economical fuel consumption is achieved. And the boiler control system Protherm Panther 25 KOO facilitates operation.

Automated operation control, temperature control and equipment self-diagnostics will be provided by a special microprocessor. The safety system will prevent overheating, freezing and short circuits due to voltage surges. The quality materials of the boiler parts make it possible to work in rooms with high humidity.

Pros:

• Ease of operation.
• Easy installation.
• Process automation.
• Working in high humidity conditions.

Minuses:

• Does not start on its own after a power outage.
• Requires annual preventive maintenance.

6 Bosch Gaz 4000 W ZWA 24-2 A

The boiler is designed for heating and water heating systems. Thanks to the ability to adjust its power, you can adjust the desired water and heating temperature. A built-in three-speed pump will ensure constant water circulation in the system. Automatic setting of work facilitates operation. It is possible to connect external programming units, a thermostat and a weather-dependent regulator.

Thanks to the closed chamber, it works almost silently. Bosch Gaz 4000 W ZWA 24-2 A is designed for heating residential and industrial areas up to 240 m2. After a little readjustment, it can run on liquefied gas.

Pros:

• Unpretentious in everyday life.
• Acceptable price.
• Possibility of water heating.
• Simple and convenient control.

Minuses:

• Powered by electricity.
• No stabilizer included.

5 Protherm Bear 20 KLOM

Stationary gas boiler, which is designed to be installed on the floor. The modulating burner can be used to regulate the power of its operation (max 17 kW). Despite the economical fuel consumption, they achieve high heat transfer (efficiency up to 92%). In the Protherm Medved 20 KLOM boiler, it is possible to adjust both natural and forced removal of combustion products. A stationary boiler can be connected to provide hot water.

A built-in sensor monitors electric ignition and the presence of a flame. The control system with an electronic display will not only help to set the comfort mode, but will also indicate an error code during self-diagnosis. Overheating protection and anti-freeze protection prevents the normal functioning of the boiler from being disturbed.

Pros:

• Flame control.
• Convenient management.
• Easy connection.

Minuses:

• There is no DHW circuit.
• The water circulation pump is not included.

4 Baxi SLIM 1.300 i

Floor standing boiler has established itself as unpretentious and reliable. It is designed for space heating and underfloor heating. Due to the open combustion chamber, the installation of a stationary chimney will be required. The possibility of connecting an external control will facilitate operation.

Due to the built-in protection functions (error indication, self-diagnostics) Baxi SLIM 1.300 i will work reliably for a long time. It is possible to use a remote control with a climatic regulator, which is purchased separately. To provide hot water, a stationary boiler is provided. If desired, it can be reconfigured to use liquefied gas.

Pros:

• Reliable in work.
• Compact size.
• Easy management.
• Possibility of connecting a boiler and underfloor heating.

Minuses:

• The ignition unit is weak.
• Slightly overpriced.

3 Ariston CLAS B 24 FF

The compact dimensions of this boiler and the possibility of being placed on the wall make it possible to install it even in a small room. It is designed for heating and heating water. The heating rate of running water is approximately 20 l / min. A built-in 40 liter stainless steel boiler will provide a constant supply of hot water. The conveniently located digital display makes it easy to control the operation of the boiler.

Ariston CLAS B 24 FF has a closed combustion chamber and an internal fan that takes air for ignition not from the room, but from the street. As a result, it uses less fuel and provides good traction. Such a boiler does not require additional ventilation, so it can be installed in multi-storey buildings.

Pros:

• Built-in boiler.
• Simple controls.
• Economical gas consumption.
• Not noisy.
• Low emission of waste into the atmosphere.

Minuses:

• No operating programming mode.
• No filter at the cold water inlet.

2 Vaillant atmoVIT VK INT 324 1-5

The floor-standing boiler is designed to operate on natural or liquefied (re-equipment is required) gas. High power allows you to heat not only living quarters, but also production areas up to 320 m2. For hot water supply, it is possible to connect a boiler.

A cast iron heat exchanger in 5 sections will provide reliability and increase the service life (due to the fact that cast iron is 2 times less susceptible to corrosion than steel). For stable operation from the network, the installation of a voltage stabilizer is required.

Since the Vaillant atmoVIT VK INT 324 1-5 boiler has an open combustion chamber, it is necessary to install a vertical chimney for the natural removal of combustion products. The control system with display makes it easy to set up and monitor the operation of the boiler.

Pros:

• Possibility of connecting a boiler.
• Gas control system.
• Automatic diagnostics.
• Reliable operation.

Minuses:

• Expansion tank not included.
• Heavy weight (99.9 kg).

1 Viessmann Vitogas 100-F GS1D871

Single-circuit powerful boiler designed for heating housing and industrial premises up to 330 m2 in size. It belongs to the category of high performance floor standing boilers. Despite the atmospheric combustion chamber, it is very quiet in operation. The premix burner reduces emissions and makes it environmentally friendly.

The reliability of the components and the protection programs mean a long service life of the boiler. Thanks to the cast iron surfaces, it can work at low temperatures and is not afraid of condensation. Viessmann Vitogas 100-F GS1D871 easy to operate, thanks to the automation of all processes. Operation is carried out using the digital Vitotronic 100 controller. On its basis, high-performance multi-boiler systems can be created.

Pros:

• Full automation of processes.
• Low temperature operation.
• Large heating area.
• Quiet operation.

Minuses:

• No display.
• Operation with a remote thermostat is not provided.

Natural gas is the cheapest energy source in Russia, so most people opt for gas heating. Heat and hot water can be obtained with a gas boiler. On sale you can find a huge number of all kinds of modifications of such equipment. Some of them are suitable for heating an apartment, while others are ideal for heating a large private house. Let's try to figure out which gas boiler is better for heating different types of premises.

Which gas boiler is better to choose depends on many factors: the weather conditions of the region, the heated area, the type of housing (apartment or private house), etc. The main criteria by which the best boiler is determined are:

• power;
• number of contours;
• type of attachment;
• the nature of the circulation of the coolant;
• combustion chamber type;
• type of heat sources.

Let's consider what criteria the best gas unit should meet.

What should be the capacity of a gas boiler?

To heat rooms of different sizes, units of a certain capacity are required. The required performance is calculated on the basis of the rule - 1 kW is needed to heat 10 m². If you want to receive hot water, then the power reserve is increased by 20-30%. Also, the indicator of optimal performance may vary depending on weather conditions, the thermal insulation of the house and the availability of additional systems.

The performance of a gas boiler depends on the operation of the gas burner. They may be:

• one-stage;
• two-stage;
• modulating.

Single-stage are capable of supporting fire in only one mode. Gas boilers equipped with such burners are not economical, but they are inexpensive. To save fuel and pay less for it, you should opt for a unit with a two-stage or even better - with a modulating burner. The first option has two levels of work power, and the second has several performance steps (from 5 to 10). Modulating or multi-stage burners increase the boiler efficiency and significantly save gas.

Which is better - a single-circuit or double-circuit boiler?

Single-circuit gas boilers are intended for heating only. Double-circuit units are capable of generating heat and hot water. However, the volume of heated liquid produced by boilers with two circuits is often not enough. If you need a lot of water for showering and bathing, you will have to buy an indirect heating boiler. It can be connected to both a double-circuit and a single-circuit unit. The second option is cheaper than the first. In addition, the boiler system with a single-circuit unit is more reliable and durable.

It is impossible to say unequivocally which gas boiler is better for heating - single-circuit or double-circuit. It all depends on the need for hot water and the personal preferences of the consumer.

Mount type

By the type of attachment, gas boilers are divided into:

• wall-mounted;
• floor.

Wall-mounted gas units are compact in size, but their power rarely exceeds 35 kW. Thus, the most powerful wall-mounted boilers are capable of heating only a room with an area of ​​up to 320 m². But they easily fit into any interior and can be hung even in a small kitchen or bathroom.

Floor-standing gas boilers are large, so you will have to look for a suitable place for them, and for models with an open combustion chamber - a separate room. Stationary units are more expensive, but they can also heat larger areas than wall-mounted counterparts.

Which is better - a floor-standing gas heating boiler or a wall-mounted one, is determined depending on the type of living space. To heat an apartment, especially a small area, a compact wall-mounted unit will be enough. To heat a large private house or industrial premises, the best option is a floor-standing gas boiler.

Natural or forced circulation of the coolant

Gas boilers differ in the type of coolant circulation. It can be natural or forced. In the first case, the coolant moves in the heating system due to the pressure that forms in it at a certain location of the boiler, radiators and expansion tank. This option is non-volatile and ideal for regions with frequent power outages. Such units are equipped with an atmospheric burner, so they can only be placed in a separate room with good ventilation.

In gas boilers with forced circulation, the coolant moves due to a pump that runs on electricity. In such units, turbocharged gas burners are often used, which do not require a furnace device. Their efficiency is much higher than that of non-volatile systems. The disadvantage of boilers with forced circulation of the coolant is that if the electricity is turned off, they will not be able to heat the room.

If in the settlement where you live, the electricity is rarely turned off, then it is better to purchase a device with forced circulation of the coolant. If the electricity is turned off often, then the best option is a system with the natural movement of the coolant.

Features of open and closed combustion chambers

Gas boilers can be equipped with open or closed combustion chambers. Units of the first group are called atmospheric - a separate room is required for their installation, since with this type of combustion chamber, the burner uses air from the environment and flue gases also enter the room in which the unit is located. Open chamber boilers require the installation of a traditional vertical chimney to allow the smoke to escape outside. The efficiency of atmospheric devices is low and amounts to 76-85%.

Gas boilers with a closed combustion chamber are also called turbocharged. They do not require a separate boiler room and a classic chimney device. To remove the combustion products, it is sufficient to install a coaxial type pipe with an outlet through the wall. The turbocharged models can be placed in the hallway, closet, kitchen or bathroom. They take air for combustion not from the room, but from the street through a coaxial chimney and have a high efficiency = 88-95%.

Many are lost in choosing which gas boiler is better for heating a house - atmospheric or turbocharged. If you are purchasing such a unit for the first time, then it is better to opt for a device with a closed combustion chamber, since it consumes fuel more economically and you do not need to spend money on a boiler room and a full-fledged smoke exhaust system.

If the boiler is bought to replace the old atmospheric unit in an already equipped furnace, equipped with a chimney, then it will be more profitable to purchase a similar model.

Note! There are two options in which it is possible to use only one type of combustion chamber. First, in the case of installing a non-volatile system, only a device with an open camera is suitable. Second, only a turbocharged gas boiler can be used to heat the apartment.

What is the difference between convection boilers and condensing boilers?

By the type of heat sources, gas boilers are either convection (conventional) or condensing. The former use only the energy obtained from the combustion of the gas. The latter, in addition to the traditional source, receive heat from condensate, which is collected on a heat exchanger.

Convection gas boilers are cheaper, more versatile and easier to operate. Condensing units are distinguished by high efficiency = 96-99%, significantly save fuel, but also cost an order of magnitude more expensive.

Note! Condensing units are capable of operating with maximum economy only at a heating medium temperature of 50-60ºC.

Which manufacturer of gas boilers is the best?

In the process of choosing, the consumer has the question of which manufacturer produces the best gas boilers for heating. Reviews and ratings show that the most reliable and durable units are those produced by the German companies Vaillant, Viessmann, Buderus. They are also leaders in the production of gas condensing boilers. Vaillant and Viessmann produce a record number of condensing units and are constantly improving their technology. However, the cost of German heating devices is quite high, as is the cost of repairing them. Therefore, the bulk of consumers prefer gas heating boilers from Italian or Czech companies. For example, devices of the brands Baxi, Ariston, Protherm, Thermona are cheaper than their German counterparts, and in terms of quality they are almost not inferior to them.

Also popular are gas boilers of domestic manufacturers Neva Lux, Lemax, Borinsky, KONORD. Of course, they are somewhat inferior to foreign models in terms of build quality and the number of additional functions, but Russian-made units are affordable, unpretentious to the quality of fuel and water, and are also resistant to voltage drops. In addition, it is easier to find components for domestic products and their repair will be cheaper.

The best batteries for a gas heating system

The gas heating system has features that give rise to certain requirements for radiators:

• low working pressure of the coolant;
• the presence of a closed loop, due to which pressure drops and water shocks are excluded in the system;
• use of high-quality coolant.

What heating batteries are better for a gas boiler? Bimetallic and cast iron must be excluded immediately. They are good for a centralized system, but not for a gas system - cast iron heats up for too long and this significantly reduces the efficiency of the boiler, and the use of bimetallic radiators in this case is not economically feasible. Thus, only aluminum batteries remain. They are considered the best for a gas heating system, but when choosing and installing, one should take into account the operational subtleties.

The disadvantages of aluminum radiators include:

• fear of water hammer;
• susceptibility to corrosion.

But in the gas system, both of these problems are easily solved: the presence of the first is simply excluded, and the second is solved by installing a filter at the inlet of tap water to the boiler.

The advantages of aluminum batteries perfectly combine them with a gas unit:

• able to quickly heat up and cool down;
• do not require a large volume of coolant;
• weigh little;
• easy to install.

It is important to correctly calculate the required number of radiators. To do this, you should pay attention to the heat transfer of one section. It is considered that 100 watts of energy is required to heat 1 m². To compensate for certain heat losses, another 10-15% of the obtained indicator is added.

To exclude corrosive processes, it is necessary to connect the boiler and radiators using plastic pipes. When installing a heating system, it should be borne in mind that aluminum is capable of releasing hydrogen gas - this occurs when the metal reacts with oxygen-saturated water. Therefore, do not forget about the installation of a Mayevsky crane to remove excess gas.

As for the choice of the manufacturer of aluminum radiators, the quality of the products of Russian companies is in no way inferior to foreign ones, but they are much cheaper.

Let's understand the variety of gas boilers. What to ask the seller first? And what will he try to "sniff"? What is it better for the owners of private houses to refuse, and what should they strive for?

Let's start the choice of a boiler for a house by considering the insulation of the building. What is available already significantly influences the choice or must be changed.

What sellers sell and buyers shouldn't take

Having bought a "slightly different" gas boiler, home owners then speak out as follows.

• Most of all complaints are subsequently caused by savings on brand reliability. Although breakdowns of gas boilers are not common, nevertheless, before buying, it is worth figuring out which manufacturers have been on the market for a long time, and what they are. What can you buy at a particular store? In terms of reliability, the products of the concerns of Germany, Italy, Slovenia, Japan and Korea are in the lead.
• The most significant criticism is the savings when creating a hot water supply on the basis of a gas boiler. After all, you will have to use hot water all the time. “I had to pay a little extra and take this…. with this…." It turned out not as convenient as we would like, and it cannot be redone.

• There are misunderstandings about power savings when buying. It does not happen often, but the complaints are the most important ...
• Recently, the owners of gas boilers have been complaining about overpayments for "super-new" technologies that turned out to be unprofitable. Although this is not too important ...
• Mistakes also occur in the fundamental choice - the best would not be a gas boiler, nevertheless, for some reason….

When the gas boiler is not the best

Does the house have a basis for economical heating?

Gas rises in price and will rise in price, like all other energy sources. Its waste will directly depend on the insulation of the house, which is also not cheap.

The better the insulation, the more expensive it is. The worse the insulation, the more expensive the heating will cost. Where is the “golden mean? - what degree of insulation is required, and how much heating power should be in order to keep the house warm?
The balance of this is determined by the design of the building, in which the insulation measures are prescribed, and hence the power of the gas boiler.

How to conduct an independent calculation of capacities

In a rough approximation, it is believed that the energy loss of a residential private house should not be more than 100 watts per square meter of heated area in the coldest month. This means that the building should be "well" insulated, and there are no frank drafts in it, i.e. ventilation under control.

And it also means that a gas boiler with a capacity of 1 kW / 10 sq. must heat the house so that it is warm, and if this does not happen, then you need to look for and eliminate heat leaks, which in the end will be cheaper than buying additional boilers and radiators, and then burning a lot of gas.

Before going to the store for a gas boiler, it is advisable to bring the building into proper shape.

What power to pick up

Gas boilers should not be much higher than the heat loss. Otherwise, a powerful burner will overheat the coolant too quickly and the boiler will constantly turn off - it will work in the mode of frequent ignition. And the overpayment for powerful equipment is useless. It is accepted that the power of the equipment should be backed up by 15% of the heat loss. But as a rule, hot water is also prepared from a gas boiler. Then the power reserve needs to be increased to 25%. Then, with a house area of ​​250 square meters. and a possible heat loss of 25 kW, the house must heat a 32 kW boiler, which must be used.

By the way, self-calculation of heat loss is a waste of time. It is unlikely that the real moisture content of the plaster, the real damage to the insulation in the attic by rodents (for example) and the actual area of ​​shading of the front window by the tree, with an ordinary wind rose, will hardly be taken into account ... so it is not recommended to engage in inventions in this regard.

What they look for when choosing a boiler

In addition to the brand and power, there are a couple of important nuances when choosing a gas boiler for your home. Firstly, already at the design stage, it is decided whether a boiler with an open or a closed burner will be. This is fundamentally important, since for units with different burners, completely different requirements are imposed on the places of installation and operation.

Secondly, it is decided how many heating circuits should be in the boiler. Domestic water is heated in the second circuit. And you need to decide exactly how it will be prepared, how much it will be needed, and where the equipment will be located. More details ...

Is an open burner useful?

A closed type burner (forced ventilation) operates under the influence of a fan. Air is sucked in from outside the room through the same pipe through which gases are removed. At the same time, it is heated. Such a system is equipped with wall-mounted compact units that can be installed in any utility room, not humid, and the pipe can be brought out through the wall. This is the cheapest and most common option. But floor-standing boilers with more advanced functionality are also supplied with such a burner ...

The open-type (atmospheric) burner is supplied to more powerful floor-standing boilers. They should be installed only in a separate combustion room, made according to the rules, equipped with an air intake for supplying air to the boiler. The smoke is removed through a high atmospheric chimney. Such boilers do not have power limitations and are recommended for large houses. Extremely reliable, supplied with a cast iron heat exchanger, etc ...

Do I need a second heating circuit

There is always one circuit for the movement of liquid through the heat exchanger in a gas boiler - the coolant for heating is heated in it.
But there may be a second circuit - it will heat water for hot water supply at home (DHW). In practice, it turns out that the second circuit reduces the final price of the DHW equipment. But it also reduces comfort.

From the second circuit, water can flow directly to the tap. This is inconvenient, since at each opening the boiler will turn on, you need to wait until it heats up and hot water comes out ... Also, water can flow into the intermediate electric boiler, where it gradually cools down, and is heated by electricity - as a result, water is a little and more expensive ...

Features of single-circuit

A single-circuit boiler is designed to work with an indirect heating boiler, in which energy from the heating medium is used for constant heating of domestic water. With this option, there is always a lot of cheap water, since it can be constantly heated by the boiler, and the capacity of the boiler is not small. The recirculation system makes it possible to get hot water from the tap immediately upon opening it. It is possible to fill the bath very quickly (draining the boiler), even if the boiler itself is not very powerful. There is a possibility to get hotter water ...
But the price for the equipment is higher.

With one or two circuits to choose

A practical recommendation is reduced to a single-circuit boiler.
The price of an indirect heating boiler with a capacity of 150-200 liters is not small. It contains a spiral pipe for heating from heating and this tank has a special coating. An additional pump is also installed, an expansion tank of the recirculation pipe .... But the subsequent comfort is more important.

With a double-circuit boiler, you can immediately get hot water in the tap without any equipment, it is enough to connect the pipe from the tap to the outlet of the second circuit. It will be possible to dial more or less comfortably even a bath, if, of course, the boiler power is from 20 kW. By paying a little extra for an electric boiler up to 50 liters, you can get an order of magnitude more comfort. And yet - is it worth saving so much and always abandoning an avalanche of hot water?

As a rule, a double-circuit boiler is an economical option, which entails certain inconveniences in the future.

How a condensing gas boiler works

The hot gases that form during the combustion of fuel contain a lot of water vapor. This water can be seen dripping from the chimney. In condensing boilers, steam is transferred to water in a secondary cold heat exchanger, which is then discharged into the sewer. For the system to work, it is necessary that the heating return be as cold as possible, literally 30 degrees.

Condensing boilers are designed primarily for low-temperature heating, for work with warm floors and with radiators (floor convectors) up to 55 degrees. Then they develop their "monstrous" efficiency of 110 (!) Percent.
But they can also work in the usual high-temperature mode, when the coolant heats up to 70 - 80 degrees.

Will a condensing boiler come in handy

In Europe, laws have been adopted obliging the installation of condensing boilers - heat generators using the energy of the phase transition of water. This increases energy savings up to 15% and significantly improves the environment.

But our ordinary houses, in most cases, are not ready for such a turn of events. Firstly, the house must be heat-saving - not only insulated, but also equipped with modern ventilation, waste water heat recuperators and a ventilation jet. Then low-temperature heating will not badly cope with our cold weather.

Also, the heating system itself should consist of a warm floor (preferably), and the area of ​​the radiators should be more than 20 - 30 percent.

It turns out that all this together, given the current gas prices, is not economically profitable. An expensive condensing boiler, together with its heating system, will not pay for itself. In Europe, where the climate is much milder and the gas price is higher, this is extremely beneficial.
Therefore, such boilers are not very popular with us.

What to choose for home

In terms of the degree of automation, in terms of the presence of protections, the lines of boilers for a private house of the same power from different leading manufacturers are similar in price. Therefore, "picking the bells and whistles" comes down rather to a choice in favor of a particular brand or design.