Wall-mounted gas boilers combine the main advantages: compactness, efficiency and ease of operation. Practice shows that in modern conditions this is the best technical solution for heating a house and heating water. And all thanks to the successful consumer characteristics, especially in comparison with solid fuel and electric ones. The rating from our editors will help you choose the best wall-mounted gas boiler for private use. It will also tell you what parameters a good gas boiler has, what advantages are important and what disadvantages may be hidden.
Rating of wall-mounted gas boilers
Heating equipment is produced by young companies and well-known enterprises that have been operating on the market for more than half a century. The VyborExperta.ru team selected models that are in high demand for testing. Boilers of different price categories were studied, empirical data were compared with the characteristics stated in the technical documentation. When compiling the review, reviews of wall-mounted gas boilers, the opinion of gas service specialists and heating engineers were taken into account.
During the analysis, attention was paid to the following parameters:
- Type of equipment – models with one and two heating circuits are available;
- Power – is directly dependent on the heated area;
- Combustion chamber type - an open design consumes air from the room, a closed one is forced into it;
- Functionality - the ability to adjust power, multi-stage safety systems make work more efficient;
- Efficiency – determines the efficiency of the heating system;
- Dimensions and weight affect the complexity of installation.
Not all models have been tested. Low efficiency indicators, shortage of spare parts, mechanical defects of the housing, rapid failure of controllers - boilers with such shortcomings were excluded from our rating.
The best heat accumulators
Varieties based on operating principle
Based on the efficiency of using thermal energy obtained by burning gas, boilers are divided into traditional and condensing.
Traditional
In traditional units, the residual heat of the exhaust gases is not used in any way, but is simply released into the atmosphere. Similar units include boilers with open and closed fuel chambers, the designs of which were discussed earlier.
Partially the residual heat is utilized in turbocharged devices, where the supply air is heated in a coaxial pipe.
Condensation
Condensing boilers, like turbocharged ones, are equipped with a closed combustion chamber and a coaxial chimney. But to extract heat from burnt gases, its design provides for the installation of another heat exchanger.
In this device, energy is exchanged between the burned gases and the coolant of the heating system. The combustion products enter the heat exchanger using a blower fan, and then the cooled air is exhausted outside through the chimney. The condensed liquid is discharged into the sewer. The coolant enters the primary circuit for further heating.
Condensing boilers have higher efficiency than traditional ones, but the complexity of the design leads to a significant increase in cost.
The best double-circuit wall-mounted gas boilers
Installing a wall-mounted gas double-circuit boiler for a private home is an opportunity to solve the problem of heating and hot water supply. The equipment is more complex, so reliability is one of the basic selection criteria. Based on the work done, VyborExperta.ru recommends 6 boilers that are distinguished by high efficiency, functionality and reliability.
Baxi Eco-4s 24F
Created by Italian engineers, adapted to Russian winters and the characteristics of main gas pipelines. A small-sized gas double-circuit wall-mounted boiler 24 kW operates effectively under pressure drops. Flame modulation is carried out using a microcontroller, which has a positive effect on fuel consumption. For this series, engineers chose a combustion chamber of a closed design and installed air supply regulation. These solutions ensured high equipment efficiency. If necessary, the burner can be reconfigured to operate on liquefied gas.
The primary heat exchanger is made of pure copper, additionally protected from corrosion. The secondary heat exchanger is made of stainless steel and has a plate design, which ensures high efficiency. The installed circulation pump has a built-in automatic air vent. A filter is installed at the inlet to protect the equipment from mechanical impurities.
Advantages:
- Stainless steel flame divider;
- Hydraulic group made of composites;
- Automatic bypass;
- Informative display;
- Effective protection systems;
- Self-diagnosis system.
Flaws:
- Not detected.
Engineers have provided two-level temperature control. This gives users the opportunity to connect two circuits - the main heating and heated floors - and set the optimal mode for each system. The connection of weather-compensating automation makes it easier to adjust the temperature.
Buderus Logamax U072-12K
The products of the German company are manufactured at a plant in Russia, the design is adapted to domestic conditions. The equipment does not lose its efficiency at low pressure in the gas pipeline, and the automation is trouble-free at mains voltages from 165 to 240 V. Resistance to voltage surges ensures uninterrupted operation. It has a plate heat exchanger that will heat water for a family of 3-4 people. The maximum flow rate of heated water can reach 8 liters per minute.
An informative display, with the help of which the main operating parameters are set, helps to exercise control. The multi-level safety system will work in case of freezing, pump blockage, elevated temperature or lack of flame. Modulation makes it possible to adjust the heating over a wide range.
Advantages:
- Closed combustion chamber design;
- Easy installation and startup;
- Convenient service;
- Built-in membrane tank;
- Low noise level;
- Holds the set temperature well.
Flaws:
- Overcharge.
Viessmann Vitopend 100-W A1JB009
Features a high level of automation. An instantaneous water heater makes the supply of hot water as efficient as possible. Equipping the combustion chamber with a turbine helped increase efficiency and make the work as economical as possible. The coolant temperature is constant and remains stably at a given level.
The German wall-mounted gas boiler with a closed combustion chamber has a built-in controller, which forms a single module with self-diagnosis equipment. The time relay allows you to set the optimal operating mode for one day or a week. The equipment is reliably protected from voltage fluctuations and pressure drops in the main gas pipeline. Information about the main technical parameters is displayed on the backlit display.
Advantages:
- Built-in 6 l membrane tank;
- Multi-level protection;
- Automatic ignition;
- It is possible to connect external control;
- Reliable circulation pump;
- High performance of the DHW system.
Flaws:
- High price.
Bosch Gaz 6000 W WBN 6000-18 C
The model from the German manufacturer is equipped with a stainless steel gas burner and a modulated fan. The volume of forced air is regulated automatically. The heat exchanger is made of pure copper and has a service life of at least 15 years. The system is protected from overheating by a temperature limiter. Flame control is carried out using an ionization electrode, and automatic ignition makes starting as simple as possible.
Reliable protection against temperature changes, gas pressure surges and voltage drops is installed. The design includes a membrane bank and a three-stage circulation pump. The housing has reliable thermal insulation, which increases efficiency and protects against overheating.
Advantages:
- Informative display;
- Small sizes;
- Low noise level;
- External temperature controllers can be connected;
- Low price.
Flaws:
- It is better to entrust the first launch to professionals.
Navien Deluxe S COAXIAL-16k
The South Korean brand Navien offers good wall-mounted gas boilers for the home at low prices. The equipment is supplied to the United States, European countries, and Russia. This series is distinguished by the high performance of the domestic hot water system, the efficiency of the new smoke removal system and an improved hydraulic group. The variable speed fan ensures economical fuel consumption.
It has effective protection of the microcontroller from power surges, and the remote control panel makes setting operating parameters as convenient as possible for the user. The boiler has a built-in pump and a reliable membrane expansion tank. All main components are easily removable, making repairs as simple as possible.
Advantages:
- Low noise level;
- Available spare parts;
- Easily converted to liquefied gas;
- Convenient service menu;
- There are no delays when switching from heating to DHW.
Flaws:
- Not detected.
Ferroli Divabel F24
The Italian boiler has one of the highest efficiency in its category. Equipped with an atmospheric burner with a reliable gas valve, a brass hydraulic unit and a 10-level safety system. Heating the heat exchanger reduces heating time and provides high speed hot water supply to the consumer. When connecting a proprietary room thermostat, the controller maintains the user-specified room temperature.
Equipped with a three-speed pump from Wilo, which is characterized by low noise levels and increased reliability. The control is electronic; a pressure gauge and thermometer are installed to control the main parameters. The manufacturer has provided a self-diagnosis function and a water filter. This increases service life.
Advantages:
- Easy installation;
- High profitability of application;
- Resistance to pressure changes;
- Simple settings.
Flaws:
- Laconic design.
Advantages and disadvantages
The advantages of floor-standing boilers include:
- no restrictions on the power of the unit;
- strength, reliability of all components and parts;
- ease of installation;
- stability of operation, the ability to maintain a given mode regardless of external conditions;
- no unnecessary additions;
- powerful models can be connected in a cascade of up to 4 units, forming high-performance thermal units.
The disadvantages of floor structures are:
- large weight, size;
- the need for a separate room;
- for atmospheric models it is necessary to connect to a common house chimney
IMPORTANT! In addition to a separate room, for floor-standing boilers it is necessary to ensure the possibility of connecting to a vertical chimney or leading a horizontal pipe through the wall.
The best single-circuit wall-mounted gas boilers
If you have a hot water boiler in your home, you can purchase a wall-mounted gas heating boiler with a simpler design. The equipment requires less maintenance and has a low price. Leading manufacturers equip their models with automatic control and self-diagnosis systems, which simplifies operation for the average user.
Baxi Eco-4s 1.24F
The convection boiler attracts with its design and high efficiency. the presence of a built-in pump and a membrane expansion tank allows you to reduce the cost of heating installations. Works equally effectively on natural and liquefied gas. Electronic control, all main parameters are displayed.
Multi-level protection ensures a high degree of safety, and automatic diagnostics will help identify faults before the technician arrives. The primary heat exchanger is made of pure copper, and the flame divider is made of stainless steel.
Advantages:
- The hydraulic group is made of composite materials;
- Low noise level;
- Easy installation;
- Stable temperature;
- Works during power surges.
Flaws:
- Not detected.
Protherm Panther 25 KTO
It has a closed chamber and a coaxial gas exhaust system, which eliminates the need for a chimney. The built-in expansion membrane tank and pump reduce the cost of purchasing components, which makes it a good choice for a private home or organizing hot water supply in a large apartment not connected to a centralized system. Automatic control allows you to quickly set operating parameters and inform you about water temperature and malfunctions.
Works well at low gas pressure and power surges. Multi-level protection makes operation safe and comfortable. The model has one of the best efficiency in its class, which reduces fuel consumption and utility costs. The self-diagnosis system helps to find problems in the operation of equipment.
Advantages:
- High power;
- Design;
- Easy installation and connection;
- Convenient settings;
- Separate mode for heated floors.
Flaws:
- Not detected.
Vaillant turboTEC plus VU 242/5-5
Designed for private houses with an area of 200-240 sq.m. The closed modulating burner smoothly regulates power over a wide range of values. Forced removal of gases ensures a high level of safety. The housing contains a membrane tank and a pump with automatic switching of stages. The pressure is controlled automatically, the software allows you to configure all the main operating parameters taking into account personal preferences and climatic conditions.
The boiler is made of pure copper, and the burner is made of heat-resistant chromium-nickel alloy. Electronic ignition makes starting heating equipment simple, and a built-in remote control module allows operation to be monitored remotely.
Advantages:
- Two operating modes;
- Efficiency 91%;
- Informative display;
- Pump jam protection;
- Self-diagnosis;
- Good equipment.
Flaws:
- High price.
Ariston Clas X System 24 FF NG
Convection model with closed burner. Operates on natural and liquefied gas. Owners do not have to purchase an additional membrane tank and pump - the equipment is built into a common housing. Electronic control, all basic parameters and operating modes are set using the display. There is a self-diagnosis function that helps identify faults.
Has built-in frost protection, air vent and safety valve. Connection of external control is provided. Auto-ignition makes starting easy, and the modulating burner allows for economical fuel consumption. Good thermal insulation of the housing helped increase the efficiency to 93.7%.
Advantages:
- Design;
- Low noise level;
- 8 liter tank;
- Programmer;
- Inlet water filter.
Flaws:
- Overcharge.
Conclusion
Gas heaters with a power of 3 to 5 kW are distinguished by the absence of electronics, which allows the equipment to be used in village houses. The owner can use a standard boiler with a single or double circuit, but to reduce fuel consumption it is necessary to reduce the heating performance. The units are equipped with electronic flame modulation units and control panels with a display; to ensure operation, they require a connection to the electrical network and a chimney to remove combustion products.
How to choose a wall-mounted gas boiler
The rating of wall-mounted gas boilers includes equipment that is worthy of installation in a private home or commercial property. It is not enough to choose a model from the TOP 10 that is suitable for the price. To keep the house warm and have enough hot water for all users, it is necessary to take into account parameters such as power and type of combustion chamber. The functionality offered by the manufacturer must meet the user's requirements.
Single-circuit or double-circuit
The user must make a choice between a single-circuit and double-circuit boiler. For a heating system, a single-circuit model is sufficient. This equipment is characterized by a simple, reliable design and low maintenance costs. If you plan to organize a hot water system in the future, you can choose a single-circuit boiler with the ability to connect an indirect heating boiler.
If there is a shortage of free space and the desire to solve problems with hot water supply by installing one boiler, it is necessary to choose double-circuit models. Among this equipment, equipment with plate heat exchangers has higher productivity.
Heated area
The second most important criterion for choosing heating equipment is the area of the room that is planned to be heated. What wall-mounted gas boiler is needed for a house with an area of 200 sq.m.? With a ceiling height of 2.7-3 m, a model with a power of 20 kW is sufficient. Unheated rooms can be subtracted from the total area of the house. When the ceiling height increases, it is recommended to increase the power characteristics proportionally. In houses with ceilings of 2.5-2.6 m, the indicators can be reduced. Thermal engineers will make accurate calculations.
Power
The power depends on the design of the burner and the volume of air consumed. The best performance is for closed, turbocharged models. Air is pumped into the combustion zone, which increases the power of the equipment. The downside of this design is the high noise level. The housing must have good sound insulation or the boiler must be installed in a separate room.
The ability to regulate power will help reduce fuel consumption and make the temperature comfortable. Modulating burners can change their operating characteristics. You can adjust the characteristics manually or automatically.
Combustion chamber type
An open combustion chamber consumes air from the surrounding space. Models of this type are characterized by low power, but have a low price. This technique is suitable for a country house or for organizing hot water supply in a small apartment. Closed combustion chambers have a more complex design; combustion air is forced in. This allows you to increase power and be able to adjust this parameter.
Functional
Manufacturers offer equipment with different sets of functions. Simple models have electromechanical control and a minimum list of security systems. More advanced equipment is equipped with microcontrollers and a multi-level security system. This equipment is reliable, economical, and easy to operate. Basic parameters are set using the monitor. A number of manufacturers offer programmed modes for using heating equipment.
An important function is self-diagnosis. The microcontroller will automatically detect faults and issue error codes. This will help you invite a repairman in a timely manner and avoid critical situations.
Types by number of circuits
Wall-mounted units are divided into single- and double-circuit. The former are intended only for heating rooms, while the latter additionally heat water.
Single-circuit
A single-circuit boiler has one heat exchanger in which the liquid is heated using heat from the burned gas. It is located above the burner in the combustion chamber and consists of a coil pipe on which a ribbed box is placed.
The materials for the manufacture of such devices are:
- cast iron;
- copper;
- steel.
The most resistant to corrosion are copper heat exchangers, but they are the most expensive. Cast iron stands are wear-resistant, but due to their fragility and heavy weight, they are usually used in floor-standing models. Wall-mounted boilers mainly use stainless steel heat exchangers.
Single-circuit units operate exclusively as heating units. To prepare hot water, it is necessary to connect additional equipment.
Dual-circuit
This heating unit has an additional DHW (hot water supply) circuit built into it. Heat exchange in it is realized in a different way - by heating one liquid from another.
The burner does not turn off. The three-way valve disconnects the primary circuit from the heating system. The coolant begins to circulate through the secondary heat exchanger, where water is heated for domestic needs.
In this case, the heating system does not function. However, a significant drop in temperature in the room is not observed, since this requires many hours of operation of the boiler to prepare hot water. In reality this never happens.
Which wall-mounted gas boiler is better?
Which boiler should you have in your home? There is no universal model, since real estate properties have different sizes and layouts. In some houses, an indirect heating boiler or an electric water heater is already installed, in others the project involves the installation of a double-circuit boiler. The VyborExperta.ru team recommends the following models, taking into account the characteristics of the objects:
- Baxi Eco-4s 24F – for heating and hot water supply of a house of 240 sq.m.;
- Navien Deluxe S Coaxial-16k – for a budget country cottage of 140-160 sq.m.;
- Viessmann Vitopend 100-W A1JB009 – for those who value quality and functionality;
- Baxi Eco-4s 1.24F – for a cottage of 200-240 sq.m., in which the problem with hot water supply has been solved;
- Vaillant turboTEC plus VU 242/5-5 – for mansion owners who are passionate about technical progress;
- Ariston Clas X System 24 FF NG is a model with a good balance between price and quality.
All boilers in the review are reliable and economical, but only models with an automated control system are worthy of the title of the best.
