TOP 35 best wall-mounted gas boilers - 2024 rating

If there is gas in the house, the best way to organize heating and hot water supply is a wall-mounted gas boiler. The costs of purchase and installation pay off quickly when compared with electric heating.

Advantages of wall-mounted gas boilers

The main advantage of wall-mounted boilers is their compactness and attractive appearance. Wall mounting also saves space. A pump group or other boiler room equipment can be installed under the boiler. As a result, on an area of ​​several square meters it is possible to place everything necessary for the boiler room. In an apartment, the issue of free space is even more acute. A wall-mounted boiler in this situation is the best option.

5 good inexpensive wall-mounted gas boilers

Budget boilers have a simple but reliable design. They have no additional options or bells and whistles, everything is minimal. But they serve their main purpose well. If your budget is limited, you can purchase a heater with a power of up to 24 kW. It is not worth buying more powerful boilers from inexpensive ones.

Ferroli Domiproject F 24

This is the cheapest boiler in the rating. Despite this, the device has an excellent set of options: autodiagnostics with indication of test results, automatic ignition, flame modulation, a full range of protective measures (from freezing, pump blocking, overheating). It is dual circuit. The device has a reliable bithermic heat exchanger with a good service life.The primary heat exchanger here is copper. Thermal power of the heater is in the range of 7-24 kW.

This is a closed camera. Bottom fittings connection. The dimensions of the device are compact, taking up space no more than a wall cabinet 40 by 70 cm, 23 cm deep. The boiler controls are electronic, a panel with indicators and regulators is located at the bottom of the front panel. The controls are intuitive. The device consumes 145 W for the electrical component.

Inexpensive.

Electronic control, self-diagnosis and other reliability and safety options.

Service life (up to 15 years).

Arderia D24

The manufacturers of the Arderia D24 boiler have applied flexibility in the configuration of the device. The boiler can operate from the mains, but after adjustment it will easily switch to liquefied gas. You can also organize the flow of oxygen and the removal of smoke in different ways: with a coaxial pipe or two separate ones. Output power is 4.6-24 kW. The heating efficiency of the boiler is about 90%. The coolant heats up to a temperature of 30-80 degrees. The device is controlled electronically. There is a programmer, protective options, auto-ignition, flame modulation is possible in all modes. Electricity consumption is 145 W.

The hot water supply is equipped with a stainless steel plate heat exchanger. The pump here has a “wet rotor”. After installing the additional unit, it will be possible to install a heated floor system with integration into a “smart home” and control using a smartphone via wi-fi.

Electronic control with programmable operating parameters.

Work on different types of gas.

All necessary security options.

Arderia B18

An 18 kW model is suitable for a smaller house. It is designed to heat an area of ​​up to 150-180 sq.m. This boiler is compact (42*65*23 cm) and economical.The consumption is 0.6-1.4 cubic meters per hour of main gas (0.8-1.7 liquefied) and 125 W goes to electrical components. This device is not only manufactured in the Russian Federation, but also adapted to work in the country, with differences in the gas and electrical networks, and with hard, low-quality water. For this purpose, there are sensors that monitor operating parameters and adapt the operation of the boiler to them in real time.

Arderia B18 has a bithermal copper heat exchanger. Power adjustment for both domestic hot water and heating. For a seasonal structure, there is much-needed frost protection. This model is also compatible with a smart home and smartphone when purchasing a special module.

Remote control.

Can operate at reduced gas pressure during network fluctuations.

Navien DELUXE COMFORT 24K

Double-circuit boilers of the Deluxe Comfort series differ from the previous generation by an improved hydraulic group. The heater has 2 separate heat exchangers that are resistant to corrosion. The primary one is made of stainless steel. There is also a new, improved secondary heat exchanger and three-way valve. The coolant in the circuit is controlled by a pressure sensor. The connecting diameter of the combustion chamber allows the boiler to be connected to a universal chimney without adapters.

The advanced burner is quiet but efficient. Measures to improve the operation of the boiler increased the efficiency to 91.4%. Electronic control, from the panel on the device or from the remote control.

Compact and quiet.

High efficiency.

SMPS chip that protects the control board from power surges.

Navien Deluxe S COAXIAL-24k

This compact and stylish boiler is capable of heating a house with an area of ​​up to 250 sq.m. The size of the device is 40 by 65 cm, 25 cm in depth.There is only a branded panel on the body; control is carried out from a remote panel. There is also an LED screen on which service information is displayed. Thermal power is adjustable in the range of 8-24 kW.
The model is characterized by high productivity (up to 13.8 l/min) and heating speed. There are separate heat exchangers here, which increases the service life of the device. The inflatable burner provides high efficiency and operates quietly. Due to the fact that the device’s operating parameters are automatically controlled by sensors, it operates uninterruptedly in a wide range of external factors.

Reliable, long service life.

Convenient remote control panel.

Quiet.

5 best convection wall-mounted gas boilers

Convection boilers are cheaper than condensing boilers. Their range is so large that everyone will find a device with the desired range of operating parameters and a set of options. At the same time, proper operation and timely maintenance guarantee a good service life. The biggest problem is lower efficiency. If it is well insulated, the difference in consumption will not cover the advantage in price. Therefore, in some cases, the purchase of this type of boiler is justified.

Mizudo M11TH

A single-circuit atmospheric boiler produces a thermal power of 11 kW. The operating range of output power is 4-11 kW, the combustion intensity changes automatically. At maximum heating, gas consumption (main) is 1.06 cubic meters per hour. If necessary, the device can be converted to liquefied gas.

Expansion tank in Mizudo M11TH 6 liters. The hydraulic group is made of brass, and the underwater pipes are made of copper. The heat exchanger is made of high quality copper and has an anti-corrosion coating.

The design of the boiler is pleasant, so you can’t hide it from view.The control panel is clear, the screen and indicators are bright. The operation of the device is controlled by a program, and it is compiled by the user. There is flame modulation. You can install a heated floor circuit onto the boiler. Among the functions that increase the quality and reliability of operation: self-diagnosis, protection against pump blocking, freezing and overheating.

High-quality materials and thick metal were used in production.

Quiet in operation.

BAXI ECO-4s 18F

The Baxi boiler from the ECO series is “tailored” to green technologies. It is economical, has adaptive automatic control, depending on a large number of external factors. As a result, under any circumstances (weather, water and gas pressure, stability of the electrical network, water consumption in DHW mode), it produces the output parameters with minimal consumption of resources. Efficiency is ensured by a patented system for supplying oxygen to the burner, continuous electronic flame modulation, and heat exchangers with anti-corrosion treatment. Thermal power of the boiler is 9-18 kW. The system efficiency is 93%. Water is supplied to the hot water system at a rate of 13 liters per minute, and the temperature is regulated within 35-60 degrees.

Comfort during operation, precise automatic adjustment of performance characteristics.

Economical.

BAXI ECO Four 1.14 F

In addition to efficiency, this model takes into account user convenience, safety and stability. The boiler has draft sensors, protection against blocking of the pump and three-way valve (the drive is turned on once every 24 hours), automatic bypass, auto-diagnosis for a wide range of indicators, protection against low and high coolant pressure and others. If necessary, indications of emergency situations are displayed on the console in the control room.

The boiler can be included in a “smart home”. It is equipped with a weather sensor, room thermostat and timer and program control, “eco” mode. The device is well adapted to work in the harsh Russian reality. It operates stably at a line pressure of 5 mbar.

Life time.

Stable operation under unstable external conditions.

Reliable.

Vaillant turboTEC pro VUW 242/3-3

The boiler is one of those options that was installed, turned on (in this case, programmed for certain parameters) and forgotten about its existence for 10-15 or more years. It's frankly expensive, but it's worth it! This is a turbocharged boiler that can remove combustion products through a supply/discharge system in the wall, without connecting to a chimney. Such equipment can be installed in a residential area. Everything necessary for connection, including a module for working with a smartphone, is included in the package.

Thermal power 8-24 kW. If the choice of mode is “winter” or “summer”, which allows rational use of resources. The primary heat exchanger is made of copper and is not afraid of corrosion. The chromium-nickel steel burner will last a long time. All possible comfort options and protection (self-diagnosis, frost protection operating in constant mode, protection against low pressure, overheating and others) are there. Operation control is carried out automatically.

Appearance, flexibility in terms of connection.

Simple management.

Quality of materials and workmanship.

Navien DELUXE PLUS 13K

It is not recommended to install an overly powerful boiler in a small house. So, to provide heat and hot water up to 130 sq.m. A Navien boiler with a thermal power of 13 kW is best suited. This model uses patented turbocharging technology.There is a fan under the burner, the operation of which is synchronized with the gas supply through sensors. This ensures complete combustion of the gas, resulting in high efficiency. The manufacturer took the liberty of installing a stainless steel heat exchanger that is insensitive to corrosion, without losing any efficiency.

The control panel and indicators are located on the front surface of the boiler. The controls are simple and intuitive. The frost protection system is two-stage. This allows you to maintain the temperature in the system above 6-10 degrees with lower energy costs. For a seasonal home this is a big plus.

Economical gas consumption.

Reliability, according to reviews, the boiler will last more than 10 years without problems.

5 best wall-mounted gas boilers in terms of price/quality ratio

A good price/quality ratio for the consumer means a fair price for a certain set of characteristics, options and service life without overpaying for the name, advertising and other unnecessary things in the household. Expensive equipment that meets this criterion must operate without problems for 10-15 years or more, and have maximum comfort and safety options. The budget option will most likely have manual settings of operating parameters and a minimum of additional functions, but will serve faithfully for 10 years.

Navien DELUXE COMFORT 35K

This boiler can provide heat and hot water to a house with an area of ​​up to 300-350 sq.m. its thermal power is 35 kW. To protect electronic components from power surges, an SMPS chip is installed. A fan with variable rotation speed ensures complete combustion of the gas in the chamber, which significantly increases efficiency.

Thanks to the simplified installation (and dismantling) of hydraulic components, boiler maintenance and repair is simplified.Also, unlike the previous generation of boilers of this brand, it is possible to connect to a universal chimney without adapters and a special Navien coaxial.

The boiler control is clear, flexible, and adapts well to operating conditions.

The control panel is organized in the form of a remote control.

 

Vaillant turboTEC plus VU 282/5-5

The premium class single-circuit boiler has a thermal power of 28.9 kW. Flame modulation allows you to adjust the power of the device to the needs of the consumer, making fuel consumption rational. The presence of different seasonal operating modes “winter/summer” also helps to save money. All operating parameters, including flame modulation, are controlled automatically. The boiler provides the ability to connect a capacitive heater to DHW and synchronize with it.

This is a turbocharged boiler. It can be connected directly through the wall, organizing the removal of combustion products without a chimney. It can be installed in a living area, the minimum side gap is only 1 cm. The “insides” can be reached through the front panel. Everything necessary for installation is included in the kit.

High quality.

Non-stop frost protection, pump and valve jamming protection, self-diagnosis.

Electronic control and monitoring, user intervention during operation is not required.

Protherm Lynx HK24

This boiler was developed in Germany and assembled at factories in China and Turkey. Thermal power 24 kW. The boiler has separate heat exchangers, the heating circuit is copper. The operating parameters in the heating and hot water system are controlled differentially by a microprocessor. In DHW mode, productivity reaches 11 l/min.

The boiler is “tailored” to work in Russian conditions: it is not sensitive to water quality and network parameters (gas and electric). Sensors monitor the pressure of gas, water and coolant in the system, the presence of a flame in the chamber, and drafts in the air duct. There are feed valves on the heating circuit, which are switched on if necessary. Electronic control is carried out from a panel on the front surface of the boiler. Information, including auto diagnostic indicators, is shown on the LCD display.

Economical gas consumption.

Works quietly.

Baxi 100022347 ECO Nova 31F

The Baxi double-circuit boiler has a high efficiency rate of 93%. With a thermal power of up to 31 kW, it consumes 3.5 cubic meters/hour. The expansion tank here is 10 liters. High efficiency indicators are achieved through intelligent control. The processor continuously interrogates sensors (room temperature sensor, draft, gas pressure, coolant temperature and others) and, based on their readings, adjusts the operation of the boiler and modulates the flame. As a result, the user just needs to set the indicators that he wants to get from the equipment, and the boiler will do everything itself.

There are 2 heat exchangers, and the hydraulic fittings are made of brass. The primary heat exchanger is copper, the secondary is stainless steel. This choice of materials significantly extends the service life of the boiler as a whole. The device produces a stable flame when the pressure in the line drops to 5 bar. It is possible to switch to working on liquefied gas.

Efficiency 93%, low gas consumption with high output from the heating system and hot water supply.

Using high-quality, most suitable materials.

Mizudo M20T

In terms of technical characteristics, this model can easily compete with boilers of top brands.At the same time, the price of Mizudo M20T is low, affordable for many. The boiler control is electronic, fully automated. There is a daily programmer with the Hot Restart function, i.e. launch with previous settings from memory. The processor itself analyzes and optimizes the operating parameters of the device to reduce energy consumption for heating.

The primary heat exchanger is made of oxygen-free copper, and the secondary one is made of stainless steel. The pipes are also made of copper, and the hydraulic components are made of brass. The boiler is not afraid of corrosion. Thanks to the coordinated operation of a whole system of sensors, it is also not afraid of low gas pressure, overheating, pump and valve jamming, overheating and overpressure.

Quiet, noise level up to 32 dB.

3 years warranty.

Multi-stage security system.

5 best single-circuit wall-mounted gas boilers

Experts believe that the best scheme for providing a private home with heating and hot water is a system consisting of a single-circuit boiler and a boiler for heating water. This allows for efficient use of resources thanks to a flexible approach. Wear and damage due to corrosion of both the boiler and boiler are reduced, and as a result, the entire system lasts longer. The main disadvantage of this solution: this pleasure will cost much more than a double-circuit boiler.

Bosch Gaz 6000 W WBN 6000-24 N

This German was created specifically for work in the CIS countries. Reliable and unpretentious, yet functional, made in a pleasant style. The boiler operates stably under gas pressure differences, maintaining heating performance at a given level. There is protection against freezing, which is important for a house with seasonal residence. The body of the device is covered with additional thermal insulation, so the walls will not be hot even when operating at maximum power.The boiler is compact, 70 by 40 cm, 30 cm deep. Large side clearances are not required.

Bosch Gaz 6000 is equipped with a room regulator with which you can control the power remotely. This model provides the ability to work together with a water heater.

Programmable control, on timer.

Maintainability, good service network.

Compact and quiet.

Viessmann Vitopend 100-W A1HB003

Viessmann Vitopend is a smart device. Work can be programmed by hours, days and even a week in advance. The Open Therm system is compatible with external sensors (room thermostat) and an alert system in case of detection (autodiagnostics) of malfunctions.

The thermal power of the boiler is 34 kW, the coolant temperature is adjustable in the range of 40-80 degrees. For such indicators (the expansion tank, pump and other fittings are built-in), the boiler is compact, its dimensions are 45 by 72 cm and 36 cm in depth. The control panel is located on the lower bar under the boiler, on the front surface. In addition to the keys and LCD display, there is an analog pressure gauge that allows you to monitor pressure in real time.

Intelligent control, programmable operation, ability to integrate into a “smart home” system.

Compact, quiet.

Viessmann quality.

Mizudo M15TH

A boiler for a small house, its thermal power is 15 kW. In the basic configuration, this is just a budget but reliable boiler. If desired, the device can be equipped with remote and intelligent control units and a boiler can be connected. Mizudo M15TH was designed to work both independently and in a smart home. There is a programmer and a timer for heating the coolant.

The primary heat exchanger is mounted on quick-release connectors. This simplifies the maintenance and service of the boiler. The heat exchanger and pipes are copper, the hydraulic unit is brass. Among the protective options there are sensors for flame separation, overheating, and draft. Overheating, boiling, increase or critical decrease in coolant pressure lead to automatic shutdown of the boiler.

Low price in the basic configuration.

Protection sensors monitor operating parameters.

Vaillant turboTEC plus VU 202/5-5

This is a convection single-circuit boiler with a power of 20 kW. Everything about it is simple and reliable. Therefore, you need to understand that half the price of this device is for the confidence in stable and safe operation for many years, that is, for the Vaillant name. Control is carried out from the remote control; there are no keys or controls on the device body. The boiler can be connected in cascade with a water heater; the necessary controls for this are already integrated into it.

Primary heat exchanger made of copper. It has high efficiency and is resistant to corrosion. The chromium-nickel steel burner has an extended service life. Electronic ignition, flame modulation and control over all operating parameters make the user’s life easier, since everything happens without his participation. The bypass and safety valves also operate automatically.

Long lasting.

The operation of the boiler and tinctures are fully automated.

Navien Deluxe One 30k

There is also the possibility of connecting an indirect heating water heater. The thermal power of the boiler varies in the range of 12-30 kW. At maximum, gas consumption is 3.2 cubic meters/h, which indicates the efficiency of the device. Considering its power, this is the most compact boiler, its dimensions are only 66*44*25 cm. The design is recognizable, in the corporate style. The control panel is touch sensitive.The chimney here can be connected coaxial or universal. The waterworks are of a European type.

The boiler is compatible with weather sensors. The control is intelligent, many parameters are programmable. If desired, the remote control will be a smartphone connected through a special unit. Periodically, the boiler performs self-diagnosis and reports the results on the LED display.

Reliable. According to reviews, the brand’s boilers are very durable.

Compact.

5 best double-circuit wall-mounted gas boilers

A double-circuit boiler costs more than a single-circuit boiler by an average of 20-30%. At the same time, it plays the role of two devices: a heating boiler and a water heater. If the heating in this scheme does not suffer, but the quality of work on the hot water supply leaves much to be desired. It does not provide good performance for really hot water. But this applies to a large number of water intake points in a large house. If there are few taps consuming hot water, then a double-circuit boiler is the best option.

Beretta CIAO 24 CSI

The CIAO series, with the CSI index, is a boiler with a closed chamber, designed for operation in northern regions where temperatures are below -25 degrees. This is achieved by a heat-insulated air intake chamber and a smoke removal pressure switch located outside it (this is CIAO NORD technology). The heat exchanger here is bithermal. When the DHW is turned on, it will have priority. Air intake and exhaust occurs through different pipes.

Protection against freezing and blocking of the pump operates continuously. The flame is modulated constantly, under electronic control. There are sensors that monitor its presence. This model provides a remote control connection. There is a self-diagnosis mode; information can also be output to external media.

Using good materials.

Build quality.

BAXI ECO-4s 10F

The economical and environmentally friendly BAXI ECO boiler can even be connected to a solar collector if desired. An energy-saving circulation pump, automatic control focused on optimizing operating parameters, a high-efficiency heat exchanger, all this allows you to reduce energy consumption. Boiler power 10 kW.

The boiler is already equipped with automatic equipment for working with weather sensors. Full set of protective options: against pump and valve blocking, freezing, low water pressure, overheating. The control can be connected to a remote control in the control room. The set heating and hot water parameters are maintained automatically by the system.

OpenTherm bus for connecting external control.

“Filling” (hydraulic group, heat exchangers) from high-quality materials.

Suitable for organizing apartment heating and hot water supply.

Navien DELUXE PLUS 16K

There are motor-thermal heat exchangers here, both made of stainless steel. The boiler is suitable for installation in rooms with low inlet water pressure (up to 0.1 bar). It prepares the hot water supply and produces normal water pressure for use. DHW capacity up to 13 l/min. Modulated power and a turbocharging system ensure complete combustion of gas in the chamber.

The electronics are protected from power surges by a special unit. The control panel is on the case, it is possible to connect to external control. In self-diagnosis mode, the boiler checks its performance using a large number of indicators.

The emphasis in work is on high-quality preparation of hot water supply.

Long service life.

Viessmann Vitopend 100-W A1JB012

An efficient plate heat exchanger allows you to instantly and efficiently prepare water for domestic hot water needs.The hot water supply speed reaches 16 l/min. Boiler power 34 kW. Gas consumption is almost 4 cubic meters/hour. The device operates stably when the gas drops to 13 mbar. Self-diagnosis electronics, gas control, and a combustion product exhaust system are responsible for safety. There is also protection against pump blocking and system freezing.

The control panel and pressure gauge are located on the boiler body. All service information and temperature readings are displayed on the LCD display with white backlight.

Programmable control, operating mode can be set by time.

Good quality hot water supply.

Full set: everything necessary for installation and operation is included in the delivery set.

Vaillant turboTEC pro VUW 242/5-3

Vaillant engineers solved the problem with the quality of hot water supply not by increasing power or increasing the secondary heat exchanger, but in an organizational way. When you turn on the water tap, the sensor records the flow rate above 1.5 l/min, the boiler switches to preparing water specifically for domestic hot water.

This is a turbocharged boiler; combustion products are removed forcibly. The secondary heat exchanger is flow-through, plate type, with good efficiency indicators. All safety and comfort devices (valves, flaps and sensors) are electrically driven and operate automatically, controlled by a processor. The boiler periodically performs self-diagnosis. The unit for connecting the eBus standard interface is already built-in, there is no need to purchase anything additional.

According to reviews, the service life is excellent; there are those who have been using the boiler for 10-12 years, and it is still in working order.

Quickly prepares water for domestic hot water.

Large selection of settings.

5 best wall-mounted gas boilers with an open combustion chamber

In boilers with an open combustion chamber, combustion air flows to the burner naturally. Therefore, there is no fan or pipe for air supply. The design is simpler and lighter, which means it is more durable and reliable. True, efficiency suffers. And the controllability of the combustion process is somewhat reduced. Most often, such devices are produced in a floor-standing version, but there are also wall-mounted options.

Ferroli Divatech D C 24

In this model, a whole range of measures is responsible for high combustion efficiency and safety: a weather sensor and remote control for flexible adjustment of work to environmental parameters, an ECS combustion control system for ionization, constant flame modulation and exhaust smoke control. When adjusting power, not only the gas pressure at the moment is taken into account, but also its calorie content.

Separate heat exchangers, copper primary and steel plate secondary, also provide good efficiency. The secondary heat exchanger is constantly heated, so hot water comes out immediately when the tap is opened. The boiler contains 20 different sensors and safety units. There is self-diagnosis.

Compact.

Works quietly.

Economical consumption of gas and electricity.

BAXI ECO Four 1.24

The boiler operates reliably when the pressure in the gas line drops to 5 bar. The primary heat exchanger is made of copper with a protective coating and is corrosion resistant. Secondary stainless steel. A reliable mechanical pressure gauge is installed. The water is filtered before heating. To control the quality of combustion products removal there is a thermostat. Chimney 120 mm.

The control panel is intuitive.You can set the temperature of the water and coolant, the boiler will independently adjust all operating parameters and provide the specified indicators. Ignition occurs automatically. Blocks for connecting external control and underfloor heating systems are built-in. There are protections against overheating and pump blocking.

High quality build.

Ionization control of burner operation.

Frost protection with sensors on the heating and hot water circuits.

BAXI ECO Four 24

This is a basic model that has been tested over time and has proven itself to be reliable and functional. Thermal power of the model is 24 kW. The manufacturer considers itself to be in the “economy” segment, but in terms of price it is close to the average. But the functional set, build quality and choice of materials can also be safely attributed to at least the average sector. The primary heat exchanger is made of high quality copper. Secondary stainless steel. Hydraulic fittings are brass.

The boiler is easy to maintain. Access to containers and heat exchangers for preventive maintenance is easy. The device itself has protection against low and high water pressure, pump and valve jamming. Ignition, control and performance monitoring are automatic.

Reliable.

Use of expensive, high-quality materials.

Vaillant atmoTEC pro VUW 240/5-3

The boiler power is adjustable in the range of 9-24 kW. The water temperature for DHW can also be controlled. When you open a hot water tap, the device instantly automatically switches to water preparation. Since there is a DHW circuit, the boiler is not intended to be connected to a cascade circuit. To install the device, no lateral clearance is required; 10 mm is sufficient.

Control is carried out by a programmer, the parameters for which are set by the user.The bypass valve, the DHW priority valve, the air vent and all other comfort and safety components are electrically driven and operate automatically under the control of the processor. For economical gas consumption, 2 operating modes are provided: “winter” and “summer”.

European assembly.

Fast preparation of hot water.

Vaillant atmoTEC plus VUW 280/5-5

This is the most powerful boiler in the atmoTEC plus line, it produces 28 kW and is suitable for heating a house up to 280-300 sq.m. It works absolutely quietly, because... air in this model is supplied naturally. The operation of the device is controlled by a large number of sensors, information from which is collected and analyzed by the processor. He, in turn, regulates the burner power, makes corrections for gas pressure, water pressure, etc. As a result, the boiler produces maximum efficiency with minimal energy consumption.

The user can independently set operating parameters, water temperature, and set the season. The boiler has a built-in module for an external control panel.

Quiet.

Good performance indicators.

Comfortable and safe operation.

5 best wall-mounted gas boilers with a closed combustion chamber

Boilers with a closed combustion chamber are quite noisy. On average they produce 40 dB, which doesn’t seem like much, but when you turn it on you can hear it well. If the heater is installed in a separate room, this will not be a problem. But the efficiency here is high, since the combustion process is completely controlled and automated.

Lemax PRIME-V24

The Lemax boiler is simply an ideal option for an apartment or house that does not have a separate equipped boiler room. The device body is completely heat and sound insulated. Therefore, it can be safely installed in a residential area.The length of the coaxial chimney can be up to 4.5 m, and the separate one up to 20 m. An OpenTherm module is built in for connecting remote control. The boiler operates calmly in difficult conditions: power surges, decreased gas pressure, and high hydraulic resistance in the system are not a problem for it.

The efficiency is 92.5%. The enlarged combustion chamber ensures complete combustion of gas. The water circuit has multi-stage protection against overpressure and overheating. Access to the device is simple, through an easily removable panel. Most of the elements are unified for the entire line of Lemax boilers, so they are always on sale and are inexpensive.

Soundproofing of the housing.

High efficiency.

High quality build.

BAXI LUNA-3 240 Fi

The 3rd generation Baxi boiler is equipped with an improved safety system: combustion is controlled by ionization, sensors and safety valves for monitoring excess and low pressure and overheating, draft sensors, automatic jamming protection, which is triggered once a day. The boiler control is electronic, an interface for outputting control to the dispatch panel or remote control. Thermal power of Luna-3 is 25 kW.

The design of the boiler has also changed. The large LED display is framed by a frame with a control panel. Most operating parameters are determined and controlled automatically. The user only sets the operating mode or comfortable water and heating temperatures.

Quality.

Heats rooms quickly and efficiently and copes well with hot water supply.

BAXI ECO-4s 1.24F

The boiler from the ECO-4s line with a closed combustion chamber has an adjustable thermal power of 9-24 kW. The heat exchangers here are monothermal: primary copper with anti-corrosion, secondary made of stainless steel. The hydrogroup in this model is made of composite materials.There is a filter at the cold water inlet. The pressure is controlled by a mechanical pressure gauge. There is an automatic bypass and a three-way valve with actuator. The boiler is equipped with an energy-saving pump with post-circulation.

Device efficiency is 93%. This is a lot, few boilers can boast of this. DHW capacity up to 13 l/min. The temperature is regulated within 35-60 degrees.

The controls are intuitive. This is the feature of the series. Service information is available to the user, self-diagnosis is carried out using a large number of indicators. The boiler operates stably even with power failures up to 130 V.

European level quality, assembled in Italy.

High efficiency, low gas consumption.

Vaillant turboTEC plus VU 322/5-5

This is a 32 kW single-circuit turbocharged boiler. Removal of combustion products is forced through a chimney of a patented design. It can be installed in dusty rooms, the side mounting gap is 10 mm. It is possible to organize smoke removal through the wall. The boiler is suitable for operation in tandem with VIN type water heaters. Everything necessary for installation, as well as a block for the eBus standard interface, are included in the kit.

Control and security systems operate automatically under the control of the processor. The user selects the “winter/summer” mode and sets the temperature. You don't have to worry about anything anymore. Process synchronization, safety monitoring, electronic health diagnostics.

Quality of materials and workmanship.

Everything you need to put it into operation, connect a capacitive water heater and external control. Due to this, the complete set is relatively inexpensive.

Bosch Gaz 6000 W WBN 6000- 12 C

The boiler is suitable for heating and providing hot water for a small house or apartment with an area of ​​up to 120 sq.m.The inexpensive basic model is distinguished by the optimal choice of materials, quality of components and assembly, and simple functionality. The primary heat exchanger is copper, the secondary is steel. Most elements of the hydrogroup are metallic.

The boiler is designed to operate in difficult conditions: with unstable pressure in the gas and water supply networks, and during power surges. For every situation there is a thoughtful response in the form of safety valves, security chips, etc. If protected from freezing, the device can be installed in a seasonal home. The controls are simple and intuitive. The panel has a “friendly” design, you can figure it out even without instructions (but it’s better to study it anyway). A mechanical pressure gauge is located on the front panel.

Low gas consumption, eco mode.

A large number of user settings, the boiler can be finely adjusted to suit your own needs.

Quality.

10 popular manufacturers of gas boilers

The boiler runs on gas, electricity and water. For a calm, safe life, you need to choose not just a device that will more or less cope with the task. We need a reliable and safe option. Therefore, it is better to look towards proven manufacturers, market leaders who value their reputation.

Bosch

Those who do not use Bosch equipment at least know about it. This name is associated with quality and exceptional reliability. Over its more than 100-year history, the company has tackled everything: from household appliances to auto components and professional medical technologies. A separate division of Bosch Thermotechnology (in the Russian Federation registered as Bosch Thermotechnology LLC) is responsible for thermal equipment in the company.The brand's boilers belong to the middle price segment and meet the strictest German quality standards. Bosch engineers are constantly looking for new solutions; the company patents new technologies for heating equipment every year.

BAXI

The Italian company started with the production of enamel-coated cookware. 50 years ago, Baxi switched to the production of heating equipment and was successful in this business. Now the company is part of the BDR THERMEA GROUP, one of the largest participants in this market sector. Thanks to the scientific and production base, much attention is paid to research work and the search for new solutions. In addition, since 2001, the production of equipment at the company's enterprises has been environmentally friendly and this is confirmed by an international certificate. The brand has been on the Russian market since 2002. Our users have already seen the high quality and durability of Baxi equipment.

Beretta

The company was founded 50 years ago and almost immediately decided on its specialization and began producing heating equipment. At first, these were kerosene, then diesel boilers. Then Bereta switched to manufacturing gas equipment.

The company has several series of wall-mounted gas boilers, each of which has its advantages:

• Kompakt, as the name suggests, compact devices.
• CIAO boilers have a new heat exchanger with increased wall thickness. The best option for our water.
• Mynute DGT provides smooth power control.

Regardless of the series, the devices can be classified as those whose price is fully justified. These are reliable, functional boilers at an affordable price.

Vaillant

One of the most experienced market participants, whose history goes back 150 years, is the German company Vaillant.The company focuses on the research and implementation of “green” technologies. Vaillant boilers stand out among competitors due to their high efficiency, careful consumption of resources, and convenient, intuitive controls. They are the quietest. The price segment of the equipment is above average. Despite this, the brand has enough fans. The design of Vaillant boilers is also worth noting. They look stylish, even sophisticated. You won’t want to hide such equipment from view. The control panel is clear (in some models it is hidden or remote), all information is displayed on a large, bright display.

Ferroli

Ferroli boilers are available to a wide range of buyers. They cost even less than domestic models. At the same time, the functionality here is excellent. Wall-mounted boilers of the brand, if necessary, can be reconfigured to operate on liquefied gas. There are all safety options: pressure, overheating, traction, frost protection and blocking of hydraulic components are controlled. The only drawback of these devices is that they are too delicate for our conditions. A significant number of failures occur due to unstable voltage in the network, too hard water and other factors. If the operating conditions of the boiler comply with European standards, then there is no point in overpaying for more durable options; the Ferroli boiler is perfect.

Navien

Some experts argue that the best boilers are made not by Europeans, but by Koreans. A striking example of excellent quality at an adequate price is Navien thermal equipment. The brand’s boilers seemed to be created to work in Russian conditions. They operate stably, without interruptions or breakdowns, when gas and water pressure decreases, and withstand power surges.Heat exchangers and all components operating in direct contact with water are resistant to corrosion. The safety of equipment operation is a priority for the manufacturer. Patented turbocharging and forced combustion product removal systems ensure economical gas consumption. The corporate style is visible in the appearance of the boilers.

Mizudo

This is a Russian brand with production in China. Most technologies and technical solutions are copied from Japanese models. The materials used are of high quality, for example, heat exchangers are made of copper, and not from alloys containing this metal, but good, high-quality copper, resistant to corrosion. As a result, the price of Mizudo boilers is affordable, and the equipment and quality are very decent. The service life of the equipment is 10 years or more. Wall-mounted boilers of the brand are presented in a wide range. Whether in a small country house or in a large industrial workshop, there is a suitable option for every consumer. The company is focused not only on private consumers, but also on corporate buyers. This is one of the most popular brands of heating equipment in the Russian Federation and the CIS.

Daesung

The Korean company develops and produces comprehensive solutions for the energy sector, gas supply, municipal and industrial heating. But Daesung does not forget about the private consumer, for whom it produces a wide range of convection wall-mounted boilers with a thermal power of 10-50 kW, several options of condensation type.

In its activities, Daesung focuses on user feedback. Satisfying the request, ensuring maximum comfort and safety when operating boilers are the company’s priorities.The company's dealer and service network is well developed in all those territories where they sell their equipment.

Protherm

This is the “daughter” of Vaillant. It is based in Slovakia and is responsible for the production of budget line boilers. At the same time, the product quality is very high, the functionality is interesting, and operation is absolutely worry-free. This brand runs in the family. Thermal equipment meets all domestic and international quality standards.

Proterm offers all types of gas boilers: single and double-circuit, with the possibility of switching to liquefied gas, convection and condensation, with a thermal power of 11-45 kW. The devices are equipped with flow sensors, pressure sensors, temperature sensors, and most models have self-diagnosis. As a result, the boilers operate stably and have a good service life in different external conditions. The manufacturer claims that the hydraulic group and heat exchangers are ready to work in conditions of hard, poor-quality water for a long time.

Lemax

The company began its activities in the Russian Federation, Taganrog in 1992. Already in 2003, Lemax launched its own production. Industrial robots and technologies for the company were ordered from world industry leaders. In 2007, the company occupied a leading position in the Russian market in terms of sales of household heating equipment.

Lemax boilers intended for domestic use are presented in an assortment. They are connected to the main gas and output 10-32 kW of thermal power. All models are convection type. All modern technologies, such as flame modulation, programmable monitoring of performance indicators, and protective options, are available here. Visually, the boilers look great, no worse than their European counterparts.

What to look for when choosing a wall-mounted gas boiler

Choosing a boiler is a responsible matter. You can't just go to the store and buy the cutest one. It is necessary to take into account a large number of parameters. The boiler must cope with the task and have a small margin of power, performance and durability. At the same time, it must be safe and reliable. It’s good if it’s also problem-free and doesn’t require attention. To get all this from the purchased boiler, you need to understand some characteristics before purchasing.

Heat exchanger design

This item determines what the boiler is intended for: heating only or completely providing the house with heat and hot water.

Single-circuit

A single-circuit boiler has, accordingly, one circuit for the passage of water through the combustion chamber. It only works for heating. To prepare hot water, you will need a separate water heater.

In addition to the burner and heat exchanger, the “composition” of a single-circuit boiler includes:

• a circulation pump that drives the coolant (prepared water or special liquid) in a circle (hot to the heating radiators, cool back to the heater);
• an expansion tank that protects the system from excessive pressure that occurs during thermal expansion of the liquid.

Most boilers in the middle and higher price categories are equipped with everything necessary (hardware and software) to work with an indirect heating boiler.

Dual-circuit

In these boilers, the second circuit is responsible for heating water for DHW needs. This is implemented in two ways:

• The bithermic heat exchanger is made on the principle of a coaxial pipe. The external circuit heats water for heating. Inside this circuit, there is a second circuit isolated - for DHW.This option is compact and lightweight. But there are a number of serious shortcomings. First, such a heat exchanger cannot be cleaned of scale. And a lot of it is formed. The second is the relative low productivity of hot water supply.
• Monothermic heat exchangers (separate) are 2 independent circuits. The heat exchanger, which is responsible for DHW (secondary), is heated not by the burner, but by the primary one. When the boiler needs to heat water for domestic hot water, the heating circuit is partially or completely closed and all the thermal energy (minus losses) from the primary heating element is transferred to the secondary one. This increases the speed of water preparation and heating temperature. The three-way valve is entirely responsible for the ability not to shut off the heating.

The primary heat exchanger in budget models is made of stainless steel, in expensive ones it is made of copper. Secondary heaters are produced only in steel versions. They need regular descaling. This is the weak point of boilers. True, replacement (in case of final failure) of this element is inexpensive compared to the cost of the boiler.

Burner design

Theoretically, there are 3 types of burners: single-stage, two-stage and modulating.

In single-stage ones, the valve opens and the burner operates at full power until it reaches a certain temperature. Then it turns off until it cools down to the lower cutoff. After which it turns on again.

In two-stage systems, the valve opens fully and the burner operates at maximum power, heating the system to a predetermined value. Afterwards, the gas valve partially closes, and the gas supply is within 40-50% of the maximum. The burner works to maintain heat.

The modulating burner is equipped with an automatic valve that can supply gas between 10-100%. The boiler power changes smoothly. This approach increases efficiency, reduces gas consumption, and increases the service life of the boiler.

Principle of operation

Engineers have developed 2 types of boilers: convection (traditional) and condensing. The former are simpler and cheaper, but they lose some of the heat from gas combustion. The efficiency of the latter exceeds 100%. But they are technically complex, more demanding to maintain and cost on average 30-50% more.

Convection

The burner is at the bottom. Above it there is a heat exchanger, which is heated by an open flame of the burner. Part of the thermal energy leaves the chimney, along with combustion products. The temperature of the exhaust gases reaches 120 degrees. The efficiency of such equipment is 91-94%.

On the plus side: in technical terms, implementing this operating principle is simple. And everything simple is reliable.

Condensation

Another additional heat exchanger has been added here. The energy from the exhaust gases is used to heat it. Condensate collects in it, the heat of which is reused. The burner is on top here. It turns out that the main heat exchanger is surrounded on top by a burner, and on the bottom by an additional heat aggregator. The efficiency of this type of boiler reaches 110%.

Since the additional heat exchanger works with condensate, it must be made of high-quality, corrosion-resistant materials. This increases the boiler in size and price. Carrying out preventive care in this case is more difficult, since access to the main nodes is complicated.

Such boilers are rarely produced in wall-mounted versions. They are bulky and heavy.

Dimensions and installation width

Overall dimensions depend on the power (burner size), the volume of the built-in expansion tank and the rationality of the layout of the components inside the housing. For domestic boilers with a power of 15-30 kW, the dimensions on average are in the range of 40-45 cm by 70-80 cm and a depth of 23-35 cm.

The boiler body, if it does not have additional thermal insulation, gets quite hot. Therefore, when installing it, it is necessary to provide some clearance. In some models, access to consumables and components is provided through the side panel. In this case, the gap is needed even more. The installation width is usually indicated in the instructions for the device. It is this value that must be taken into account when planning the location for installing the boiler.

Type of connection to the electrical network

All wall-mounted gas boilers are energy-dependent. In addition to connecting to the gas mains, they constantly need electricity to operate. The circulation pump, draft fan, electric valve actuators and all electronics operate from electricity. Boilers consume on average 120-150 W/h. To connect, they only need a single-phase 220 V network. The abundance of electronics requires protection from extreme surges in the network. Therefore, it is advisable to connect the equipment through a surge protector.

Control type

Options available: mechanical and electronic. Mechanical control is rarely installed in gas boilers, since there are too many control parameters; electronics cope with this task better.

Mechanical

More often, mechanical control means a control panel with mechanical rotary switches, with which you can regulate the temperature of the hot water supply and in the heating circuit. Then all processes occur in the same way as in devices of the second type.Therefore, choosing the type of switches is purely a matter of taste and personal preference.

Electronic

This is a more popular option. A panel with an LED display, neat buttons or touch keys looks more modern and stylish. The user also sets the boiler operating parameters, but here it becomes possible to make more subtle and precise adjustments and even programming.

Power

The power determines how much area the boiler can heat. It is calculated at the rate of 1 kW per 10 sq.m., plus a margin of 10-15%. That is, to heat an apartment of 120 sq.m. a 13-14 kW boiler is required. In double-circuit boilers, you can add another 10% for better quality (higher speed and temperature) of hot water. It’s not worth purchasing a boiler “for growth”. It is more expensive, consumes more energy, and can overheat, even stopping due to protective signals.

The combustion chamber

Combustion requires not only gas, but also air, and in sufficient quantities. Combustion products fill the space around the flame, but are already useless, “empty”. They must be withdrawn so that the fire does not go out. The design of the burner determines how the air flow to the flame is organized and combustion products are removed.

Atmospheric

Atmospheric boilers, also known as “with an open combustion chamber,” consume air directly from the room. Technological holes are provided in the housing for this purpose. Combustion products escape through a standard vertical chimney.

Boilers of this type are simpler in terms of design; they do not have forced draft or pressurization mechanisms. Therefore, they are lighter, more compact and cheaper. In addition, the simpler the device, the lower the likelihood of failure of some components and the system as a whole.

Disadvantages of atmospheric boilers: the burner becomes very dirty and needs regular cleaning, high requirements for ventilation in the room in which the boiler is installed.

Turbocharged

In this case, the combustion chamber is hermetically sealed. Combustion air enters through a coaxial or separate pipe, forced inside by a fan. Smoke is also removed forcibly through an internal pipe of a coaxial structure or through a separate chimney. It's convenient and safe. The location requirements for installing such a boiler are minimal. There are no harmful emissions into the room.

Such boilers are more expensive than open boilers, all other characteristics being equal. But they are more economical. Automatic synchronization of air and gas supply leads to complete combustion of the latter. The maximum is squeezed out of the gas. Under certain conditions (heated area, hot water consumption, seasonality of operation), purchasing a closed boiler turns out to be profitable in the long term.

Additional functions

A boiler is a serious device in terms of safety issues. Even the simplest models have a full range of equipment for safe operation. Therefore, additional functions are more likely to be responsible for operating comfort.

Settings and the ability to program allow you to organize heating and water supply with minimal resource consumption and maximum quality. So, in some models it will be possible to adjust the boiler by hour and even day of the week. You can turn down the heating while everyone is at work, and turn up the heat when the weather forecast predicts colder temperatures.

Modules - elements of a “smart home”, such as a weather sensor, a room thermostat, a switching unit for connecting a remote control or control from the control room, cost money, but also improve the quality of life.

It often happens that users of gas boilers have not even thought about which one to choose and buy. This decision is delegated to representatives of the company that organizes heating and hot water supply, repairmen and other competent persons. However, there are no difficult questions in choosing a boiler. Some parameters, such as power, type of chamber, chimney, are determined based on conditions. The remaining parameters are more related to comfort.