The rating of double-circuit wall-mounted gas boilers will allow you to determine the optimal model that matches your budget and the interior of your home. The temperature parameters for all modifications are practically the same. More expensive variations have a multifunctional self-diagnosis system. The working life and reliability of the device is determined by the quality of the assembly and the safety of the mounted elements. devices are intended for heating rooms of various types with the possibility of simultaneous supply of hot water. Consider several brands that are recognized as leaders in the relevant market.
System Wolf GGG-1R-24 (Wolfe)
In the rating of double-circuit wall - mounted gas boilers, this device occupies a leading position. The device is equipped with a forced smoke removal function, has a closed working compartment. The built-in fan allows you to adjust the number of revolutions depending on the length of the outlet pipe used.
The advantages of the modification include the following aspects:
- High efficiency.
- Mounted on a wall without lateral access.
- It is possible to connect to the pipeline with natural and liquefied gas.
- Instant start-up of hot water supply is provided.
- Soft start, compact dimensions and relatively low weight of 40 kg.
- Automatic equipment of type Wolf CGG-1K-24 is provided.
- Thermal value - 9.4-24 kW.
- The presence of a pair of heat exchangers made of copper and stainless steel.
- The expansion tank has a volume of 8 liters.
- High build quality, ease of installation, design reliability complement the advantages of the unit.
Bosch-6000 W (Bosch)
In the ranking of double-circuit wall-mounted gas boilers for heating a private house, this German brand occupies a leading position. The unit is specially designed taking into account the climate and energy supply in various regions of the Russian Federation. The device has wide functionality.
Its advantages:
- Ergonomic and original design.
- Compact dimensions do not interfere with the installation of equipment in small-sized residential and utility rooms.
- Stable operation is ensured even with intermittent voltage and pressure in the working pipeline.
- Fuel is saved thanks to the presence of high-tech elements and connections.
- Perhaps the functioning of the main and balloon gas.
- Improved smoke removal and fire safety.
- Power - 24 kW.
- Type of a working chamber - a closed compartment.
- Productivity - up to 11.5 liters of hot water per minute.
- High-quality assembly and focus on work in difficult conditions of some regions of the Russian Federation.
Baxi Luna-3 Comfort 240 Fi (Baxi Moon)
The rating of double-circuit wall-mounted gas boilers will be continued by a representative of Baxi. The model is fully oriented to work in the Russian water and gas supply system. The unit is able to fully function even when the input pressure drops to 5 mbar. The removable panel is equipped with a digital screen, acts as an indicator of the outside air temperature, aggregates with liquefied gas, and is equipped with a filter element for water.
By cons, users include high cost and a sensitive electronic control system. The advantages in this device are incomparably greater:
- The unit is adapted to domestic operating features.
- A removable panel and a closed combustion chamber increase the efficiency to a maximum level.
- The design is not in vain one of the best wall-mounted double-circuit gas heating boilers, the rating of which is presented in the article. This is due to the presence of a liquid crystal control screen and indicator, as well as the possibility of self-diagnosis.
Navien Deluxe 24K (Navien Deluxe)
This brand also got into the best rating of double-circuit wall-mounted gas boilers. The device is equipped with a closed combustion chamber, which is adapted to work in domestic conditions. A functional menu and original design complement the quality features along with an affordable price.
Advantages of the unit:
- A frost protection block is provided, which works in automatic mode, maintaining an operating temperature of 6 degrees.
- The stability of functioning is noted in the case of a reduced supply of water pressure and gas pressure.
- A complete remote control system is included.
Rating of wall-mounted gas boilers of double-circuit Protherm brand ("Proterm") "Cheetah 23 MOV"
These units are designed for homes in the private sector and apartments that have a need for hot water and heating. The efficiency of the unit is more than 93 percent, they produce at least 11 liters of hot liquid per minute.
Benefits:
- Convenience and simplicity in management and service.
- The presence of a liquid crystal informative screen.
- Heating elements and burners are able to function independently of each other.
- There is a possibility of self-diagnosis of equipment.
- There is a switch of work depending on the season of the year.
- An efficient circulation pump complements the package.
- Protection against overheating, freezing and excessive pressure is provided.
- There are indicators of the presence of flame and draft in the chimney.
To the negative aspects, users attribute the need to install a filter at the inlet when water is supplied, as well as designing the structure exclusively in rooms with a chimney.
Valliant ecoTec plus VUW INT IV 246 ("Valliant")
From this manufacturer, wall-mounted gas dual-circuit boilers rating have more than 9.5 points on a ten-point scale. The German unit is capable of generating thermal power in the region of 20 kW, which is enough to heat an area of up to 200 square meters. The device in question belongs to the class of condensation heaters. This design allows you to use less gas while providing the desired temperature.
Modification Features:
- The Aqua-Power-Plus option, giving the chance to increase power to 24 kW.
- Digital module type eBus and analytical system DIA.
- Application in places with low temperature heating.
- The function of air intake from the inner and outer shell is provided.
Buderus Logano G234 WS-38 ("Buderus Logano")
In the rating of wall-mounted double-circuit gas boilers of a closed type, this brand was rated 9.8 on a ten-point scale. The unit belongs to a powerful category, focused on heating large areas. The thermal power of the device is 38 kW. This allows heating space of 380 square meters.
A gas double-circuit wall-mounted boiler, the reliability rating of which is one of the best, is adapted to work in domestic conditions. The device can provide not only heating, but also water heating, thanks to the large volume and automatic type of control.
Model Baxi Duo-tec Compact 24 ("Baxi Duo")
The rating of the best wall-mounted double-circuit gas heating boilers is continued by the Italian brand. The device is equipped with a closed working chamber, two heat exchangers made of stainless steel. The boiler is easy to maintain and install, adapted to work in domestic electric and gas supply. The power for the minimum indicators is up to 5 mbar at the input.
Features:
- Compact dimensions and light weight.
- High efficiency is up to 35 percent for the heating period.
- There is a deep modulation mode.
- The unit is characterized by low noise and vibration.
- Saves money on equipping the chimney (an analog version with a reduced diameter and exhaust gas outlet through the wall is available).
Power calculation options
Gas wall-mounted double-circuit heating boilers, the rating of which is given above, require the correct calculation of power during operation. Consider these options in several available versions.
- Roughly take 1 kilowatt per square meter of heated space. In this case, the maximum power of the equipment is taken into account from the average external temperatures and structural features of the room.
- The second method also does not require the use of special formulas and calculations. The operating values are multiplied by a correction factor, which is 1.5 for Moscow and 2.0 for the northern regions. For buildings of the summer type that do not have good insulation, this indicator increases to 4.0, taking into account the characteristics of the building in this way, you can quite accurately select the required value.
- The third option is considered the most difficult. It is based on the calculation of all heat losses of the serviced compartments. The scheme takes into account the maximum and minimum ambient temperatures, as well as the features of the building.
Features
It is worth noting that the rating of double-circuit wall-mounted gas boilers with a closed combustion chamber shows their variety according to the type of heat exchanger and the possibility of preparing hot water. It is worth noting that the heat exchange unit is performed in a bimetric or separate design.
The first option serves as a unit with a pair of circuits that are equipped with coaxially arranged pipelines (pipes are placed one inside the other, larger in diameter). Such designs have fewer elements, but require careful maintenance, to avoid the formation of scale and deposits.
Separate heat exchangers are heated from the primary power source, their price is much more expensive than paired options. They are less sensitive to salts and other implants in the composition of the water, but require the inclusion of additional taps and control devices. This variation allows you to get a larger volume of hot water for a certain unit of time.
Burners
These elements are divided into atmospheric types and supercharged samples. Wall mounted burner models are predominantly built-in. They are selected based on the required parameters and power.
Atmospheric instances receive a working mixture of air and gas by exposure to excessive pressure. This option belongs to the simplest and most common method in the category of boilers of small and medium volume. The pressurized burner receives the gas-air mixture using the built-in fan. Using the ability to adjust this device, you can adjust the operating modes and power of the device. This allows you to get rid of power surges and pressure, but it requires high costs while increasing noise during operation of the unit.
Air intake
This parameter is one of the most important in the rating of wall-mounted gas double-circuit boilers for reliability. There are modifications with an open or closed working combustion chamber. The first variations function by taking air directly from the premises served. This method is simple, but requires additional replenishment of the external cold flow. To do this, you need a powerful ventilation system, part of the energy of which is spent on heating the incoming air.
Models with a closed combustion chamber receive flow through a separate pipeline from the street. To do this, using the fan creates additional traction. This design has its advantages in terms of cost effectiveness and less dependence on the arrangement of the chimney. At the same time, it is more noisy, expensive and volatile.
Condensation or convection?
This indicator for double-circuit boilers is in the first place. Convection standard models lose some of their energy with the exhaust gases. Their efficiency is about 90 percent. This aspect increases in proportion to the temperature of the gases (the lower it is, the higher the productivity of the equipment). However, there is one feature: when the operating temperature is above 56 degrees, the effect of condensation is observed. This phenomenon is very aggressive on the elements of the device, capable of bringing them to a non-working state in a couple of seasons. As a result, the maximum temperature is not more than 100 degrees, giving the rest of the heat without any benefit.
Condensing wall-mounted double-circuit gas boilers, the rating of which we have considered, are more economical, but they require several mandatory measures. The efficiency of such models is 10-12% higher than traditional models. Condensation is carried out directly in equipment that uses not only the internal temperature, but also the indicators released during condensation. The result is the so-called highest combustion value.