The best double-circuit gas boilers: 2022 rating

The advantages of installing a gas boiler for heating in Russia are obvious: gas supplies are more stable, it will not be turned off unexpectedly, and gas is cheaper than electricity. What do we need from a good gas boiler? So that the house is warm, so that the device is safe and lasts a long time.

Temperature readings for all models are approximately the same. All heating boilers comply with safety standards, but more expensive models have a complex multi-stage self-diagnosis system and effective automatic protection. Reliability and service life are determined by the quality of parts and assembly (and, of course, you must follow the rules of use!). We studied the opinions of experts and customer reviews and selected the best models of gas boilers that combine reliability, safety and efficiency.

First, let's figure out which manufacturers of gas boilers deserve our attention first.

Advantages and disadvantages of double-circuit gas boilers

Double-circuit gas boilers are used to heat small and medium-sized houses, as well as to provide households with hot water supply. This is the most budget-friendly and easiest-to-implement way to establish communications.

The main advantages of double-circuit gas boilers:

• High coefficient of efficiency (efficiency). With the correct selection, installation and operation of gas equipment, the average efficiency reaches 90% or higher. Regardless of the outside temperature, type of equipment and type of fuel. The main thing before purchasing equipment is to calculate its required power, based on the square footage of the house.
• Autonomous heating and hot water supply.
• Cost of fuel - gas. This natural resource has the most reasonable price when compared with electricity, coal, etc. In this case, there is no need to additionally purchase a boiler to provide hot water supply.
• Long service life of high-quality equipment (subject to its proper operation and maintenance). Many manufacturers provide a warranty of several years.
• Economical consumption of energy resources.
• Almost silent operation of the equipment. The design of gas boilers has been brought to near perfection, making operation stable and quiet.
• Even the most budget models of double-circuit gas boilers are equipped with a built-in software unit.
• The ability to hang some models on the wall, which will significantly free up space.
• To install it, you do not need to allocate a separate room for it.
• Almost all parts are interchangeable, so repairs are not very costly and simple.
• Gas tanks containing natural gas are considered absolutely safe for human life and health.
• Ease of use. There are only a few buttons on the dashboard, which are enough to operate gas equipment.

Despite the large number of advantageous features, double-circuit gas boilers, unfortunately, are not without drawbacks.

Among the main disadvantages are:

• The hardness of the water in the pipeline greatly affects the service life of the heat exchanger.
• Double-circuit gas boilers are capable of providing the room with hot water only at one water intake point.
• The equipment depends on the stability of the electrical network, which is used to turn on the burner.
• It takes up to 1 minute to warm up the water. Cold water will flow from the tap for 60 seconds.
• Stable operation of hot water supply depends on the pressure in the pipeline. The water can suddenly become scalding hot, then cool, or vice versa. It will not be possible to control this process.

Otherwise, all models of double-circuit boilers have remained market leaders for several years.

Operating principles

There are convection and condensation gas boilers.

In convection chambers, the coolant is heated in the fuel combustion chamber. In condensation chambers, in addition, the heat obtained as a result of the accumulation of steam is used.

Which double-circuit gas boiler is better to choose?

To get the maximum benefit from a working double-circuit gas boiler in a private home, it is necessary to select, install, operate and maintain it correctly. When choosing the optimal device model, you should not focus only on price; there are many other important criteria.

When choosing double-circuit gas boilers, you need to pay attention to the following criteria:

• Floor or wall model .
  The dimensions of the equipment depend on this. Floor-standing models of gas boilers weigh on average 100 kg. They are placed in separate rooms – boiler rooms. Floor-standing gas boilers have an open combustion chamber, which is why a high-quality ventilation system must be designed in the room and all the necessary documentation must be pre-filled. Wall-mounted models are lightweight and compact in size. Most of these models do not “require” a separate room and are installed in the bathroom or kitchen. The small size also affects the power; it is low.
• Heat exchanger material. For high-quality and long-term operation of the equipment, the heat exchanger must be durable and conduct heat well. Today it is made from copper, cast iron and stainless steel.
  Copper heat exchangers are the most expensive. Advantages: resistant to temperature and corrosion, lightweight material. Disadvantage: when water leaks, copper quickly burns out.

  Cast iron is not as expensive as copper, but it is also not low in cost. Advantages - long service life (about 50 years), not afraid of corrosion. Disadvantage - the material is sensitive to temperature changes.

  The most budget models are equipped with a steel heat exchanger. But nevertheless, steel has important qualities necessary for high efficiency of floor-standing gas equipment. Advantages: plasticity, not afraid of water and heat shocks. Disadvantages: prone to corrosion.

• Condensation or convection?
  Convection boilers have a reasonable price due to the simplicity of the device. To heat the room, only fuel combustion energy is used. Convection boilers are characterized by an efficiency factor of 90%. The remaining 10% “fly” down the drain. Gas combustion products that leave the house have a temperature of about 200 degrees.

  The condensing boiler has significant structural differences in comparison with its counterpart. The price for such models is higher. Advantage - boilers emit more heat than is released during fuel combustion. The efficiency of high-quality models can reach 100-110%.

• Open or closed combustion chamber . Models equipped with an open combustion chamber require a constant flow of air for combustion of natural gas for smooth operation. Gas boilers with a closed combustion chamber force air through the pipe using a fan. Condensing boilers always have a closed combustion chamber, so they are always more efficient and have higher efficiency.

There is a large selection of double-circuit gas boilers on the market with different prices, power, additional functionality, etc. To simplify your search, it would be a good idea to familiarize yourself with the rating of the best gas double-circuit boilers in 2022.

Criterias of choice

When purchasing a gas boiler, you must take into account the following technical indicators:

• Installation methods
• Power
• Type of combustion chambers
• Type of heat exchanger and raw materials
• Availability of service functioning.

These parameters are key indicators that you should pay attention to when purchasing equipment.

TOP 15: The best double-circuit gas boilers in 2022

The best floor-standing double-circuit gas boilers

The best wall-mounted double-circuit gas boilers

The best budget double-circuit gas boilers up to 35,000 rubles

TOP best double-circuit gas boilers

The best floor-standing double-circuit gas boilers

Double-circuit gas boilers are 100% automated units, the main purpose of which is to heat rooms. Roughly speaking, this is a mini-boiler room, which includes two heat exchangers for hot water supply and heating, a burner, a pump and a remote control for adjusting the indoor climate. There is no need to additionally purchase a water heating tank, since the boiler also provides residents with hot water. The range of double-circuit boilers is very large, so it may be difficult to choose the most preferable model. Today in the article we will look at the rating of the best floor-standing double-circuit boilers.

Siberia 29K, 29 kW

A good double-circuit floor-mounted gas boiler.

Floor-standing gas boiler Siberia 29K, 29 kW

The rating of the best floor-standing double-circuit gas boilers opens with the Siberia 29K . The maximum thermal power reaches 29 kW, and the room area should not exceed 300 sq. m. The design features of the boiler allow it to be installed on the floor. The model is equipped with an open combustion chamber.

Siberia 29K is based on the following operating principles: energy dependence, convection. Mechanical control. Efficiency reaches 90%. The primary material of the heat exchanger is steel. The coolant can reach a maximum of 90 degrees. Chimney diameter 138 mm.

Main characteristics

• Max. thermal power: 29 kW
• Combustion chamber: open
• Heated area: 300 sq.m
• Efficiency: 90%
• Fuel: natural gas
• Natural gas consumption: 2.94 cubic meters m/hour
• Max. coolant temperature: 90 °C
• Chimney diameter: 138 mm
• Weight: 76 kg

Advantages:

• The optimum ratio of price and quality.
• High performance and efficiency.
• Small size and relative ease of installation.
• High quality build and consumables used.

Flaws:

• No.

Design principles

In a double-circuit boiler system, two heat exchange circuits are installed. The first serves to heat a closed heating system, while the second heats water for household needs.

The coolant of the primary circuit is heated in a special box for burning fuel.

The water for the hot water supply hydraulic system is heated thanks to the coolant installed in the primary circuit; this only happens when the hot water supply tap is opened.

The best wall-mounted double-circuit gas boilers

Double-circuit gas boilers are fully automated equipment designed for space heating and water heating. This is a mini-boiler room with two heat exchangers for hot water and heating, a burner, a pump and a remote control for adjusting the indoor climate. There is no need to additionally purchase a water heating tank, since the boiler provides hot water. The range of double-circuit boilers is very large, so it may be difficult to choose the most preferable model. In the article we will get acquainted with the technical characteristics of the best wall-mounted double-circuit boilers.

Buderus Logamax U072-35K, 35 kW

A good double-circuit wall-mounted gas boiler.

Wall-mounted gas boiler Buderus Logamax U072-35K

The last line in the ranking of the best wall-mounted double-circuit gas boilers is occupied by Buderus Logamax U072-35K . This is a very popular model that has many positive reviews on various forums. The maximum thermal power of the unit is 35 kW, capable of heating an area of ​​up to 350 sq.m. Wall installation. The combustion chamber is closed type. Electronic control. The primary heat exchanger is made of copper.

Main characteristics

• Thermal power: 12.20 - 35 kW
• Expansion tank volume: 10 l
• Natural gas consumption: 3.9 cubic meters m/hour
• Liquefied gas consumption: 2.7 kg/hour
• Coolant temperature: 40 - 82 °C
• Temperature in the DHW circuit: 35 - 60 °C
• Max. water pressure in the DHW circuit: 10 bar
• Max. water pressure in the heating circuit: 3 bar
• Weight: 39 kg

Advantages:

• Available functionality: autodiagnostics, pressure gauge, frost protection, thermometer, flame modulation, overheating protection, pump blocking protection, auto-ignition, power indicator.
• Built-in protection systems: air vent, gas control, safety valve.
• Easy to manage and configure.
• The optimum ratio of price and quality.

Flaws:

• Energy dependence. Operates from a single-phase electrical network.

Bosch Gaz 6000 W WBN 6000-18 C, 18 kW

High-quality double-circuit gas boiler.

Wall-mounted gas boiler Bosch Gaz 6000 W WBN 6000-18 C

The next line in the rating is occupied by the reliable and efficient boiler Bosch Gaz 6000 W WBN 6000-18 C. The maximum thermal power of the unit is 18 kW. Wall mounting. Operates from a single-phase electrical network. This model is equipped with a closed combustion chamber. The control is electronic, but does not cause difficulties in settings. The primary heat exchanger is made of copper.

Main characteristics

• Thermal power: 5.40 – 18 kW
• Thermal load: 6 - 20 kW
• Heated area: 180 sq.m
• Expansion tank volume: 8 l
• Natural gas consumption: 2.1 cubic meters m/hour
• Liquefied gas consumption: 1.5 kg/hour
• Coolant temperature: 40 - 82 °C
• Temperature in the DHW circuit: 35 - 60 °C
• Max. water pressure in the DHW circuit: 10 bar
• Max. water pressure in the heating circuit: 3 bar
• Weight: 29 kg

Advantages:

• Operates on natural and liquefied gas.
• Available functionality: pressure gauge, automatic diagnostics, thermometer, frost protection, overheating protection, flame modulation, automatic ignition, pump blocking protection, power-on indication.
• Provided protection systems: air vent, gas control, safety valve.
• The optimum ratio of price and quality.
• Quiet and stable operation.

Flaws:

• It is better to entrust the first startup of the boiler to a specialist, because the manufacturer makes the initial setup difficult.

The best budget double-circuit boilers up to 35,000 rubles

Double-circuit gas boilers are fully automated equipment designed for heating rooms and heating water. This equipment is quite in demand, so in stores you can see a large assortment of gas boilers with different pricing policies and a built-in set of functions. Today we will take a look at the rating of the best budget double-circuit boilers up to 35,000 rubles.

Arideya KS-GV-12.5, 12.5 kW

A good budget double-circuit floor-mounted gas boiler.

Budget gas boiler Arideya KS-GV-12.5

the Arideya KS-GV-12.5 double-circuit gas boiler worth 32,000 rubles. The maximum thermal power of the unit is 12.5 kW, which will be enough to heat a room up to 150 sq.m. The design is intended for floor installation and operation.

Arideya KS-GV-12.5 is equipped with an open combustion chamber. Mechanical control. Chimney diameter 100 mm.

Main characteristics

• Max. thermal power: 12.50 kW
• Efficiency: 92%
• Natural gas consumption: 1.62 cubic meters m/hour
• Nominal natural gas pressure: 13 mbar
• Coolant temperature: 40 - 90 °C
• Weight: 53 kg

Advantages:

• High performance and efficiency (92%).
• Functionality: thermometer, overheat protection. Gas control is also provided.
• The optimum ratio of price and quality.
• High quality Italian assembly and spare parts used.
• Quiet and stable operation.

Flaws:

• There is no summer operating mode.

Ferroli Tantaqua NF 30, 31 kW

The best double-circuit gas boiler under $100.

Budget gas boiler Ferroli Tantaqua NF 30

The next line was taken by the Ferroli Tantaqua NF 30 , costing only 6,500 rubles. This is the most budget option and is worth every penny spent on it. The maximum thermal power of the unit is 31 kW, designed for heating areas of no more than 300-350 sq.m. Operates from a single-phase electrical network. It has a closed combustion chamber. Mechanical control. The design includes a built-in circulation pump and a built-in expansion tank.

Main characteristics

• Heating area: 236 m²
• Boiler (tank) volume: 100 l
• Net power: 29.5 kW
• Capacity: 22 l/min
• Efficiency: 90.3%
• Max. gas consumption: 3.47 m³/h
• Expansion tank capacity: 10 l
• Expansion tank pressure: 1 bar
• Weight: 209 kg

Advantages:

• Liquefied or natural gas can be used for operation.
• Functionality: pressure gauge, on/off indication, overheat protection, automatic ignition.
• Built-in protection system: air vent, gas control, safety valve.
• Simply perfect value for money.

Flaws:

• In the event of a breakdown, it is not easy to find the necessary spare parts.

Which manufacturer is better?

The use of outdated technologies and low-quality materials in the production of a gas boiler can significantly affect not only the service life of the equipment, but also safety.

Therefore, experts recommend purchasing them only from trusted manufacturers.

The best of them are:

• Baxi . An Italian brand whose devices are distinguished by reliability, silent operation, and a large selection of power. There are models equipped with boilers with a capacity of 60 liters, the water in which heats up in half an hour.
• Wolf . German manufacturer producing a wide range of gas boilers. Brand models have increased reliability, extended warranty, economical gas consumption, and expanded functionality.
• Vaillant . Also a German manufacturer producing high quality gas boilers. The devices are characterized by accelerated heat transfer, efficiency, and increased safety.
• Buderus . Another brand from Germany that produces compact units with high power and excellent performance.
• Protherm . A Czech manufacturer that produces gas boilers together with the French company Hepworth Saunitr Duval. The brand's products are distinguished by attractive design, ease of operation and high safety.

One of the main requirements for gas equipment, including heating boilers, is safety..

All well-known manufacturers place special emphasis on this. In addition, due to the use of only high-quality materials in devices, the products of the above brands have a very long service life.