Top 35 best double-circuit gas boilers for a private home - rating

To create comfortable living conditions in a private house or apartment, recently consumers have been choosing double-circuit gas boilers. The equipment has a high efficiency rate. They are easy to use and significantly save energy. Our rating of the best double-circuit gas boilers will help you choose the model that suits your requirements.

Overall dimensions and width for installation

Additional functions

• Show in full ▼
• Advantages of double-circuit gas boilers
• The main advantages of gas boilers with two circuits compared to single-circuit ones:
• Thanks to two circuits, the consumer receives two systems at once - for heating the room and obtaining hot water.

Compact dimensions, without the need to install additional equipment - a boiler.

Continuous heating of water, without the need to accumulate it in a separate boiler.

Affordable price compared to a single-circuit boiler, for which you will need to buy an additional boiler to obtain hot water.

Some models can be connected to the "smart floor" system.

5 good inexpensive double-circuit gas boilers

The prefix "budget" does not mean that the equipment is of poor quality. Most models from the "economy class" segment, from domestic and foreign manufacturers, have a long service life and a high degree of maintainability, excellent technical characteristics.Siberia 29K

Protherm Panther 30 KOV 2015

5 best condensing double-circuit gas³Protherm Lynx condensation 25/30 MKV³Navien NCB 700 24KW

Vaillant ecoTEC pro VUW INT IV 236/5-3

Rinnai BR-C36

Ariston ALTEAS ONE NET 30

15 popular manufacturers of double-circuit gas boilers

Baxi

Navien

Protherm³Ariston

Buderus

Bosch

Vaillant

Viessman

Lemax

Ferroli

Immergas

Federica Bugatti

Beretta

Mizudo

Siberia

What to look for when buying a double-circuit gas boiler

Combustion chamber type^{The principle of operation of a gas boiler}Structural design and material of the heat exchanger

Accommodation

Control

Power

Energy independence

Availability of a boiler

Dimensions and installation width

Additional functions

Show in full ▼

Advantages of double-circuit gas boilers

The main advantages of gas boilers with two circuits compared to single-circuit ones:

Thanks to two circuits, the consumer receives two systems at once - for heating the room and obtaining hot water.

Compact dimensions, without the need to install additional equipment - a boiler.

Constant heating of water, without the need for its accumulation in a separate boiler.

Affordable price compared to a single-circuit boiler, which will require an additional boiler to obtain hot water.

Some models can be connected to the smart floor system.

5 good inexpensive double-circuit gas boilers

The prefix “budget” does not mean at all that the equipment is of low quality. Most models from the “economy class” segment, from domestic and foreign manufacturers, have a long service life, a high degree of maintainability, and excellent technical characteristics.

Navien DELUXE PLUS 13K

The Korean double-circuit boiler is designed to heat a room up to 104 sq. m. Equipped with two stainless steel heat exchangers and a built-in control panel. Net weight of the equipment is 28 kg. Power 8.0-13.0 kW. Turbocharged combustion chamber.

Protection against low temperatures, so it is suitable for installation in rooms without insulation.

Protection against voltage fluctuations in the SMPS type electrical network with fluctuations of up to 30%.

Stable operation is guaranteed at a gas pressure of 4 mbar.

Allowed for use in housing, with low water pressure up to 0.1 bar.

Russified built-in control panel on the front panel.

Thanks to the ability to connect a coaxial chimney with a fan, the process of removing combustion products is accelerated.

Kentatsu Nobby Balance Plus 12-2CS

This is a compact double-circuit boiler with a closed combustion chamber. It is possible to connect a thermostat to adapt the equipment to the room temperature. Efficiency – 92%. Weight (net) – 30 kg. Gas consumption – 2.37 m

/hour, when working on liquefied gas – 2.09 m

/hour. Electrical protection rating – IPXD4D. Designed to heat a room up to 120 sq. m.

Productivity up to 13 l/min.

Circulation pump with automatic air vent.

Digital fault indication.

Built-in copper heat exchanger with a special coating that guarantees flawless operation and durability of the equipment.

Ionization flame control.

Arideya KS-GV-12.5

This is a universal energy-independent double-circuit boiler with a gas consumption of up to 1.6 m

/hour, floor type. Equipped with heat exchangers made of high-quality 2 mm steel. Designed for a heating area of ​​up to 125 sq. m. Efficiency – 92%.

Thanks to rectangular pipes, the heating time of the coolant is reduced, and, accordingly, gas consumption is reduced.

IMIT thermometer.

Micro-flare injection burner.

Quiet operation of the boiler.

Gas control function

Daesung A 16²Designed for a heating area of ​​up to 150 square meters. m. Maximum thermal power 15.1 kW. Wall mounting. Efficiency – 91%. Permitted gas pressure (liquefied) – 35 mbar. Natural gas consumption – 1.77 cubic meters. m/hour, liquefied – 1.32 kg/hour. Productivity when supplying hot water – 12 l/min. The manufacturer has provided the option of installing a separate chimney. Closed combustion chamber. Weight – 22 kg.³The basic kit includes a remote control.

Copper primary heat exchanger and hydrogroup connection pipes with thermal conductivity of 99.9%.

Can be used with a regular 80/80 or coaxial 60/100 chimney, without purchasing additional adapters.

Ferroli Divaproject F24

For installation in rooms up to 200 sq. m. Efficiency - 93%. Weight – 30 kg. Operates on liquefied and natural gas. Energy-dependent double-circuit boiler with modulating burner. Hot water supply capacity 13.7 l/min with a temperature of 30

O

C. It is possible to connect additional equipment - a control panel, a programmer, which will save up to 20% of gas and electricity.

Works in regions where water has increased hardness.

Turbocharged, that is, with a forced exhaust gas removal system.

Steel combustion chamber.

The heat exchanger for the IUD is high-speed plate, the second is copper.

5 best double-circuit gas boilers 24 kW ^{The name double-circuit boilers already contains many advantages.And if there is a prefix - 24 kW, then this means that the heating area is 240 square meters. m.}Lemax PRIME-V24

A double-circuit boiler operates on the principle of forced circulation of coolant. Combustion products can exit through a coaxial or separate chimney. Suitable for installation in houses where there is no organized chimney. Efficiency – 92.5%. Net weight – 22 kg. Heating area – up to 240 sq. m. Works great in networks where there is high or low voltage (185-245 V). You can connect additional peripheral devices.

Continuous sound, noise and heat insulation.

Enlarged combustion chamber.

The lining is easily removable, which provides access for repair work and access to the gas valve.

Double level of protection against high pressure in the heating circuit.

Bosch Gaz 6000 W WBN 6000-24 C

Bosch turbocharged wall-mounted model with two built-in copper heat exchangers. The boiler is designed for heating housing up to 240 sq. m. Thanks to a multi-row burner with flame modulation, gas or electrical energy consumption is significantly reduced. The combustion chamber is closed type. Electronic control system. Efficiency – 93%. Weight 31 kg.

Low noise level, about 38 dBA.

Modulated power from 30 to 100%.

The “ECO” mode allows you to set a certain water temperature, which will be heated to this value only when it is withdrawn.

Built-in automation for regulating room temperature.

It is possible to set a schedule for turning the heating on and off.

Ferroli Vitabel F24

The wall-mounted double-circuit boiler is equipped with 2 heat exchangers - made of copper and stainless steel.You can connect the CONNECT chronothermostat (control via smartphone), but only if the model was manufactured in 2020 or later. Efficiency – 93.1%, closed combustion chamber. Weight – 30 kg, maximum heating temperature – 85 degrees.^{The three-speed pump ensures virtually silent operation.}Self-diagnosis and 20 levels of protection.^{Thanks to the Comfort function, the heating time for hot water is reduced as much as possible.}It is possible to switch to a separate smoke removal system.

De Dietrich ZENA MS 24 MI FF

Low-temperature double-circuit wall-mounted boiler with a closed combustion chamber. Can run on propane, but subject to additional conversion. Stainless steel burner with ionized flame control. Digital display of control panel. Net weight – 33 kg. Built-in expansion tank.

The hydraulic group is made of composite materials.

Compact dimensions: 73x40x30.

Gas block with 2 safety valves.

Installation in a closed cabinet is allowed.

Possibility of additional installation of almost any thermostat.

Arderia B24

The double-circuit boiler is designed to heat homes up to 250 sq. m. Powerful bithermic copper heat exchanger. The equipment is wall-mounted, with a closed combustion chamber. Efficiency – 90.1%. Expansion tank volume – 7 l. Closed combustion chamber. Coaxial chimney. Net weight – 29 kg. Electronic self-diagnosis system.

It is possible to control via Wi-Fi (optional).

Possibility of modulating the DHW and heating flames.

Stable operation at low inlet gas pressure - up to 4 mbar.

Simple conversion to operation on liquefied gas.

Protection against pump blocking and low pressure.

5 best wall-mounted double-circuit gas boilers

This line of boilers is compact and light in weight. They are easy to install and absolutely safe.

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Navien DELUXE COMFORT 35K

This model of the Navien double-circuit boiler retains all the advantages of the previous generation of equipment - differential pressure sensor, protection with an SMPS chip, remote control. DELUXE COMFORT is designed to heat a room up to 350 m

. Efficiency 91.5%. Weight – 29 kg. Expansion tank 8 liters. Works on natural gas (flow rate up to 3.77 m

/h) and liquefied (up to 3.14 kg/h) gas.

Ideal for hard water with a high content of magnesium and calcium salts.

The flow sensor in the heating circuit has been replaced with a coolant pressure sensor.

Navien coaxial is not required, since the diameter of the chimney is changed to universal sizes.

Immergas Nike Mythos 24 3 R

Double-circuit boiler with compact dimensions (440 mm X 756 mm X 240 mm) and a forced smoke removal system. Equipped with LCD control panel. Heating is designed for 240 sq. m. Two separate heat exchangers. Efficiency – 89.8%. Weight – 24.6 kg. Power – 23.6 kW.

Antifreeze.

You can connect a room thermostat and an external temperature sensor.

Electric ignition.

Built-in diagnostic system.

FEDERICA BUGATTI 24 VARME³Designed for heating housing up to 240 sq. m. runs on liquefied and natural gas, equipped with a circulation pump. Weight – 28.5 kg, with maximum water heating temperature – 80

O

C. Efficiency – 92%. Closed turbo combustion chamber. Expansion tank 8 liters.

All parts of the hydraulic group are connected to each other by copper pipes.

Invisible protective film on the case, which can be removed after contamination.

It is possible to connect to the “warm floor” system.

LCD control panel with 6 control buttons.

BAXI NUVOLA-3 Comfort 280 i

Designed to heat a room up to 280 sq. m. A double-circuit boiler operates at a reduced gas pressure of up to 5 bar. Weight – 70 kg. The kit includes an energy-saving circulation pump. Flame spreaders made of stainless steel.

Suitable for families with high water consumption, it heats up to 490 liters in 30 minutes.

Removable digital control panel (can work via wireless protocol).

Built-in 60-liter stainless steel boiler with magnesium anode.

After reconfiguration, it can operate on liquefied gas.

2 operating modes - normal (30-85 degrees) and low temperature (30-45 degrees).

Viessmann Vitopend 100-W A1JB011

A double-circuit boiler is capable of heating a room up to 290 square meters. m. Maximum electricity consumption – 140 W. Gas consumption when using liquefied gas is minimal - up to 2.55 kg/hour. Operation is allowed at temperatures from - 20

O

From to +50

O

C. Weight – 39 kg.

Turbocharged.

Illuminated information display.

Variable smoke exhaust installation system: vertical, horizontal, separate.

Built-in timer for programming work - by day, week.

5 best floor-standing double-circuit gas boilers

Floor-standing gas double-circuit boilers are recommended for installation in large premises. They are large and should mainly be installed in separate technological rooms. They operate almost silently and are easy to use.

Lemax Premium-40B^{The floor-standing double-circuit boiler is designed to heat 400 sq. m. Operation on natural gas with a reduced operating pressure of up to 3 atm is allowed.Equipped with a micro-torch injection burner. Open combustion chamber - atmosphere. Efficiency – 90%. Runs on liquefied gas. Without expansion tank. Net weight – 92 kg.}Does not require connection to an electrical outlet.

Polidoro pilot burner with piezoelectric ignition.

You can connect a remote monitoring and control device.

Italian automatic 820 NOVA.

Siberia 23K

Designed to heat an area of ​​up to 230 sq. m., with an open combustion chamber. Weight – 70 kg. Suitable for use in industrial facilities. Weight – 70 kg. Efficiency – 90%. Equipped with a capillary thermometer. Open combustion chamber. Control is mechanical.

Non-volatile.

High maintainability due to ease of access to equipment components.

EUROSIT automation system.

Basalt thermal insulation.

Navien GA 23KN

Double-circuit convection boiler, designed to heat a room up to 230 square meters. m. Closed combustion chamber. Efficiency – 91.5%. Electronic control system. Economical gas consumption: natural – up to 2.24 cubic meters. m/hour, liquefied – 1.96 kg/hour. Weight – 74 kg. Floor installation. Equipped with SMPS chip.

Russified remote control panel as standard.

Steel heat exchanger.

The pipes are located on both sides, which simplifies the installation process.

AKGV focus - 29 EM

Double-circuit boiler for heating an area of ​​up to 260 sq. m., with the ability to work in closed and open heating systems. Efficiency – 92%. Weight – 70 kg. Runs on liquefied gas. Equipped with a thermomanometer and pressure indicator.

Automation gas block 710 MINISIT.

Removable turbulators, gas pipe connections on both sides, which simplifies the repair and maintenance process.

Non-volatile.

Atem Zhytomyr-10 KS-G-010SN

Double-circuit floor boiler for heating a room up to 100 sq. m. Net weight - 56 kg. It is possible to additionally install a heating element for connecting a backup electric heating. Protection against overheating, lack of draft in the chimney and gas shutdown. ^{Economical fuel consumption - up to 1.07 m} /hour.

Does not require connection to the power grid.

Gas automation 630 EUROSIT.

High performance of the 2nd circuit - up to 10 liters per minute.

Independent gas water heater unit.

5 best double-circuit gas boilers with a closed chamber

The main thing of predominantly turbocharged double-circuit boilers is a high efficiency rate compared to atmospheric ones. They do not require additional ventilation equipment, since air intake from the room is not provided.

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Viessmann Vitopend 100-W A1JB012

A double-circuit turbocharged wall-mounted boiler, designed to heat 200-300 sq. m. (depending on the selected model with a capacity of 24 or 34 kW). Efficiency - 90%. Weight - 40 kg. Runs on liquefied and natural fuel. Removable body for maximum ease of access to boiler components during repairs. Designed for closed heating systems.

Built-in expansion tank that does not require any settings before starting operation.

It is possible to control via Wi-Fi.

Built-in pump to prevent stagnant zones.

Built-in plate copper heat exchanger for hot water supply with protection against limescale accumulation.

NAVIEN TURBO DELUXE C 24K coaxial

A double-circuit wall-mounted boiler is suitable for heating a room up to 240 sq. m. Equipped with freeze protection. Modulated turbocharging system.Weight without water – 26 kg. Efficiency – 91.3%. Protection against voltage surges in the network based on the SMPS chip. Built-in APS air pressure sensor to change the rotation speed of the turbocharger fan.

Equipped with a remote control with a thermostat function (radius up to 50 meters), with the ability to save gas up to 23%.

Montermic heat exchangers made of stainless steel and copper.

Fast heating of water, 13 liters in 1 minute.

The boiler can be used even with very low inlet water pressure - up to 0.1 bar.

De Dietrich ZENA Plus MSL 31 MI FF

Wall-mounted model with a closed combustion chamber designed to heat an area of ​​up to 310 sq. m. To switch to propane, conversion will be required. The boiler is equipped with a mechanical pressure gauge and draft sensor. Expansion tank with a capacity of 8 liters. Efficiency – 93.1%. It is possible to connect to a vertical or horizontal chimney. Weight – 40 kg.

Supplied assembled, the boiler is completely ready for installation.

Compact size (780mm x 45mm x 35mm).

There are steel filters at the inlet.

Protection from moisture and electrical surges.

Heating area – up to 30 sq. m. Efficiency – 93.6%. Russified control panel, with matrix display and backlight. Operates at inlet pressure up to 5 mbar. This Ariston double-circuit boiler is capable of operating at temperatures down to -52

O

C. When connecting an indoor or outdoor air temperature sensor, it regulates gas consumption, reducing or increasing the boiler power. Weight – 31 kg.

Thanks to the built-in Wi-Fi module, you can control the operation of the boiler from your mobile phone.

Modulating pump that allows you to save up to 30% on electricity.

Enlarged secondary heat exchanger, thanks to which you can speed up the supply of hot water.

Low electrical energy consumption - 50 W.

• Vaillant turboTEC plus VUW INT 202/5-5
• Double-circuit wall-mounted boiler Vailant with a closed combustion chamber. Two separate heat exchangers, turbocharged chimney. Hot water output per minute is 9.5 liters. Efficiency – 93%. The volume of the expansion tank is 10 liters. Weight – 35 kg. Allowed for installation in residential areas.
• “WINTER/SUMMER” mode.
• You can set partial heating power.

Built-in eBus interface module.

Forced removal of combustion products.

Can be combined with heat pumps and solar systems.

Bronze hydraulic components.

Heat exchangers made of stainless steel and copper.

5 best double-circuit gas boilers with an open chamber

The advantages of atmospheric boilers are their low cost, ease of maintenance and quiet operation. These models are time-tested and rarely break down, regardless of the manufacturer.

Navien ATMO 13AN

Double-circuit convection wall-mounted boiler for heating a room up to 130 square meters. m. Weight – 26 kg. It is possible to operate on liquefied gas after conversion. Efficiency – 86%. The boiler can be used with an inlet water pressure of up to 0.1 bar.₂.

Remote remote control with LCD display (included).

Built-in harness.

Protection against voltage fluctuations in the network.

Frost protection when water temperature drops to 10

O

C, the circulation pump turns on automatically.

Ariston CARES X 24 CF NG

Designed for heating rooms up to 240 sq. m., with an open combustion chamber. Electronic control, control panel - LCD screen. Automatic ignition.You can connect a remote control with a temperature sensor (purchased additionally). Efficiency – 91.9%. Boiler weight – 26 kg. Expansion tank 8 liters.

There are coarse filters inside, which allows the boiler to be used at high water hardness levels.

Hot water productivity is 14.3 liters per minute.

Emergency pump blocking function.

BAXI ECO-4s 24

Compact wall-mounted model with an open combustion chamber. Efficiency – 91.4%. Weather-compensated automation. Push-button control panel. Adapted for low gas pressure - up to 5 mbar. Liquefied gas consumption - 2.04, natural gas - 2.73. Condensation protection and self-diagnosis. The expansion tank is designed for 6 liters. Weight – 29 kg.

Minimum electricity consumption – 130 W.

Dynamic stabilization of hot water temperature.

Can be connected to solar systems and water heated floors.

“WINTER/SUMMER” mode.

Includes a pump with automatic air bleed.

Siberia 29K

Allowable area for heating is 290 square meters. m. Floor-standing model with an open combustion chamber. Weight – 76 kg. Efficiency – 90%.

Thermal insulation – basalt fiber.

Atmospheric burner made of heat-resistant Polidoro steel.

Built-in capillary thermometer with increased capillary volume, pressure gauge.

Automation unit SIT.

Protherm Panther 30 KOV 2015

The double-circuit boiler is designed to heat up to 300 sq. m. Suitable for using hard water. The combustion chamber is open. The kit includes a Grundfos circulation pump. Separate heat exchangers and weather-compensated automation. Efficiency – 92%. Expansion tank 10 l. Net weight – 34 kg. Built-in draft control in the chimney.

Quiet operation - noise level 32 dB.

Electrical power consumption – 93 W.

Thanks to the Aguafast function, water is heated in 2 seconds.

5 best condensing double-circuit gas

The advantage of such boilers is their increased efficiency. In comparison with others, we can safely talk about 15-20%. Their modulation coefficient is also high, from 30 to 100%.

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Protherm Lynx condensation 25/30 MKV

The Proterm Rus double-circuit boiler is equipped with separate heat exchangers and is designed to heat 200 sq. m. and hot water supply. The basic configuration includes a circulation pump. Efficiency – 104%. Electronic control unit. Works great on gas and poor quality water. Expansion tank 8 liters. Backlit control panel. Autodiagnostics. Weight without water – 32 kg.

Aluminum-silicon primary heat exchanger that guarantees boiler operation even with poor water quality.

Full eBus communication, allowing the equipment to be integrated even into complex heating systems.

Hot start – 2 seconds to heat the water.

Navien NCB 700 24KW

Wall-mounted double-circuit model. Efficiency – 107.8%. Can be converted to run on liquefied gas. Backlit controller. Weight – 36 kg. Volatile.

It is possible to regulate the water heating temperature.

Possibility of programming for a day, a week.

You can include a “smart floor” in the system.

Coaxial chimney “pipe in pipe”.

Vaillant ecoTEC pro VUW INT IV 236/5-3

Wall-mounted double-circuit gas boiler with modulating burner. Efficiency – 109%. It is allowed to include low-temperature radiator and panel heating into the system. Combustion air intake can be carried out outside or inside the room. 10 liter expansion tank. Designed for 230 sq. m.Equipment weight – 33.4 kg.

Digital information and analytical system DIA-System.

The heat of condensation is used to remove water using the Aqua-Kondens system.

Economical electricity consumption - up to 90 W.

Rinnai BR-C36

• Wall-mounted double-circuit model with a closed combustion chamber of 355 sq. m. Modulated power. A low-temperature panel-radiant or radiator heating system can be turned on. Efficiency from 98% to 105%. To operate on liquefied gas, a burner change is required. Can be installed in a residential area. Weather dependent. Weight – 37.5 kg.
• Ecological. Minimal emissions of CO and NO
• Can be equipped with a digital remote control with voice control.

Gradually adjustable water temperature.

Acid condensate neutralizer.

Fan with adjustable speed.

Ariston ALTEAS ONE NET 30

Double-circuit boiler with a closed combustion chamber. Quiet operation (39 dB). Designed to heat an area of ​​up to 300 square meters. m. Built-in Wi-Fi module. The set includes outdoor and indoor sensors. Modulating pump (built-in) and fan. Weather-compensated control. Efficiency – 109.8%. Built-in 8-liter expansion tank. Net weight – 35.3 kg.

You can connect a Sensys remote control panel.

• Deep modulation - 11% -100%.
• Accelerated supply of hot water.

Increased cross-section of heat exchanger pipes.

Switch to liquefied gas without additional settings and equipment.

The heating equipment market is quite large. Today there are 15 leading manufacturers.

• Baxi
• The Italian brand Baxi appeared in 1924, created by Austrians who began their activity with the production of enamelware. From 1978 to 1984, the company was part of the Zanussi group, after which until 1998 it was part of the El Fi group under the name Ocean Indroclima. It was during this period that the company began to focus on export. Since 1999, it was renamed BAXI GROUP. In 2009, it became part of BDR Thermea.
• Today, the company is a leading Italian manufacturer of hot water supply and heating systems. It produces wall-mounted, floor-standing, condensing gas boilers, electric water heaters. The total volume of gas systems produced is about 500,000 units per year.

Navien

The company began its work in 1978 in Korea. Since 1988, it has been producing condensing gas boilers. In 2006, it entered the international market for the first time. Now it is a recognized leader not only in the Asian market, but also around the world.

Protherm

The Slovak company began its activities in 1992. In 1994, the production of wall-mounted gas boilers was established. In Russia, it first presented its products in 1997. Now the company's range includes more than 95 units of various heating equipment, from gas to diesel boilers. Since 2009, it has been recognized as a leading manufacturer in Eastern Europe.

Ariston

The Italian Merloni family founded a company for the production of scales in 1930. Already in 1945, the production of gas cylinders and electric water heaters was established. In 2005, after a series of mergers, the Indesit company appeared, with the brands: Ariston, Hotpoint, Indesit, Scholtes and others.

Buderus

Back in 1731, in a small town in Germany, Johann Buderus opened a production facility for the production of cast iron and components for fireplaces and stoves. Already in the 19th century, the company produced cast-iron sectional boilers. After which the rapid expansion of the model range begins. In 2003, the company merged with Robert Bosh GmbH.

Bosch

Today the Boch company is one of the most popular in the world. Founded in 1886 by Robert Bosch (Germany). Now the company's assortment includes practically any large and small household appliances, climate control systems. It has many brands, including Siemens, Gaggenau, Buderus and others. Production facilities are located almost all over the world.

Vaillant

The German company was founded in 1874. This is one of the first productions of gas boilers in Europe. Today it is a recognized world leader in the field of gas equipment and water heating systems.

Viessman

• Wismann was founded in 1917 as a family company in Germany. Today it has 11 production workshops in different parts of the world. The brand is represented in 74 countries. It appeared on the territory of the Russian Federation in 1994. In addition to high-quality equipment, the company offers service and training.
• Lemax
• The Russian company Lemax has been active since 1992. Today it has 2 large industrial sites. The range includes a huge amount of equipment for autonomous heating and water heating.

Ferroli

This Italian company does not require any special introduction. It was created in 1995 and today is a leading manufacturer of air conditioning systems, heating systems, and radiators. Every year, 8 enterprises across Europe produce more than 400 thousand units of gas boilers.

Immergas

The production of household appliances by this Italian brand started in 1964. Currently, about 240 thousand gas boilers are produced per year. The company has only 10 production sites (Italy and Slovakia). In 1990, the company entered the world market, and in 2000 it began to introduce condensation technologies into its products. In 2010, hybrid systems were successfully introduced with the ability to not only heat the room, but also cool it.

• Federica Bugatti
• The Ferrloi Buggati company was founded only in 2016 in Italy. In a very short period of time, it was able to become a leading manufacturer of heating equipment in Europe. The company now has 10 factories throughout Europe.
• Beretta

An Italian company that has been part of the Riello concern since 1996. This brand produces household heating equipment, including floor-mounted and wall-mounted gas boilers.

Mizudo

Russian manufacturer Mizudo from the Tula region. Production facilities are located in China. The main advantage of the products of this brand is ergonomics, ease of installation, safety and long service life.

Siberia

Rostovgazapparat produces gas boilers under the Siberia brand. This is the first Russian company to launch the production of gas boilers in the country. Today it is the flagship of this industry. In addition to the Siberia brand, Rostovgazapparat is the owner of the AOGV and RGA brands.

What to look for when buying a double-circuit gas boiler

• Gas boilers are installed not only in private houses, but also in apartments. This is a real opportunity to make the heating of your home autonomous.Even if you have not yet turned on the centralized heat supply, you can always turn on “your own” and set the optimal temperature for a comfortable stay in your home. But there are many subtleties that you need to know in order to choose the boiler that suits your conditions and requirements.
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• Combustion chamber type
• Open combustion chamber - air intake comes from the room where the boiler is located. The exhaust comes out through the chimney. This option is more suitable for private houses. Boilers with an open combustion chamber are not recommended to be installed in living rooms, since with insufficient ventilation, a lack of oxygen may be felt. They should be installed in separate rooms.

The operating principle of a closed chamber is completely different - air intake comes through a coaxial chimney from the street. Exhaust gas is released through the chimney. The method is also called "pipe in pipe". The closed chamber has more advantages: