- Oasis BM-16
The choice of design for heating depends on the analysis of technical characteristics and parameters. The buyer selects a model based on the number of thermal circuits, quality of workmanship, power indicator, method of increasing the temperature in the room, type of combustion chamber, level of electricity consumption, number of control modes, features of burners and ignition, method of removing combustion products and additional functions. We suggest that you familiarize yourself with the rating of wall-mounted gas double-circuit boilers - which company’s heater is better?
Main varieties
In the process of choosing a unit, it is necessary to understand the shape of a particular model, which determines its ability to heat the air. The following types are divided depending on the fuel consumed:
- Electrical – dependent on voltage drops.
- Diesel.
- Solid fuel is a classic option.
- Pellet.
- Combined - you use different types of materials to generate heat.
- Gas.
Number of thermal circuits
There are two varieties on the market - with one and two elements. Main differences:
- A single-circuit system is used only for heating a living space - if you want it to heat water, it is recommended to purchase an indirect incandescent boiler.
- The dual-circuit version increases the temperature of the air and liquid. They are characterized by compactness and the ability to direct the movement of the coolant. It costs less, despite the improved functionality.
The second group has an obvious advantage - low cost.
Type of execution
Separate wall-mounted and floor-standing devices. The first group is the most popular due to the possibility of saving free space and compactness, as well as a large selection of power.
The device of the second group is used for houses or apartments with a total area of no more than 200 m2.
They are installed on a horizontal surface. Equipped with special devices that ensure safe operation:
- flame presence indicator;
- thermostat with locking function;
- remote control for turning off the boiler in case of interruptions in gas, water supply, etc.
This type of product is the most popular.
Power indicator
Heating intensity is one of the most important parameters that is taken into account when selecting a specific model. The basic calculation formula is as follows: for 10 m2 of area with a ceiling height of up to 3 meters, 1 kW is needed. For a more accurate determination, check with a professional.
Specialists will make electrical calculations. When ordering this service, the thickness of the walls, ceilings, the number and dimensions of windows, the location of the fireplace, stove and rooms, the presence of other heating elements and other factors are taken into account.
Heating method
There are two types of systems - convection and condensation. In the second case, heat is obtained by burning gas. When using the first form of design, efficiency increases by 30% due to the use of steam energy from the falling condensate.
Combustion chamber view
The devices are available in open and closed types. The first option consumes oxygen from the room in which the boiler is installed and requires the installation of high-quality ventilation to remove waste combustion products into the pipe.
The second type does not require a ventilation outlet.
The advantage of the second system is the forced air supply through the operation of a fan. It takes oxygen from a room or street. The technology makes it possible to use equipment compactly, without allocating a separate room to it.
Features of dependence on the source of electricity
Gas wall-mounted double-circuit boilers - which one is better to choose? It is important to pay attention to the equipment and the presence of additional elements. The efficiency of the device depends on the specific heating and built-in circuits that ensure safe operation. Dependence on the power source should be minimal - in the event of a power outage, the heat exchanger stops functioning.
Autonomy can be achieved by simplifying the control system over functions and introducing automation. You can use a thermal generator that converts energy into electrical current.
Number of control modes
Double-circuit designs have two main types of control - heating and water heating. Modern models have the ability to change the speed of water heating and space heating. In some variations, you can program settings: maximum/minimum power, pump operating features.
Types of burner
The process occurs through the influx of oxygen. The air flow is distributed over the area, ensuring uniform combustion. This task is carried out using a combustion device - gas evaporates on the surface and heating occurs. This component of the unit comes in two categories:
- Atmospheric - installed inside an open combustion chamber.
- Forced - used in a closed type design.
The first device works like an ordinary stove - fuel is mixed with air and set on fire. A feature of this option is ease of operation and silent operation. The main disadvantage is the low level of efficiency. The forced system is a universal and more modern alternative.
Type of ignition
For most wall-mounted gas boilers, there are two methods: piezo and electric. The first category operates in semi-automatic mode. It consists of the main and pilot parts. Started by pressing a button. This type of ignition is characterized by ease of operation and reliability. Designs with piezo-type mechanisms are characterized by low cost and ease of control.
Electric ignition is used for automatic speakers. When the mechanism is triggered, a spark appears, initiating a flame. The fire does not burn if heating of the air or coolant is not required. If you experience frequent power outages, it is recommended to purchase a model with batteries.
Method for removing combustion products
A chimney is used to remove combustion products. It is important to choose the right basis for a particular type of structure. Aluminum, ceramic and stainless steel pipes are used for gas boilers. Aluminum pipes meet all requirements, are affordable and quite durable to use. Ceramic is a good choice if you are willing to invest a sufficient amount and spend time and money on installation.
An excellent alternative is a chimney made of stainless steel sandwich panels. They are the absolute leaders in the number of advantages, including long service life, corrosion protection, ease of maintenance and competitive prices.
Among other things, a forced turbocharged system is popular.
Material for making a boiler
To create it, they stop at steel or cast iron. For floor-standing models, copper and aluminum are used - these metals are well suited for a wall-mounted boiler. Professionals do not have a clear opinion about the best alternative. The cast iron base for the heat exchange device is considered heavy, but is valued for its high strength and durability. It all depends on the quality of the alloy and production features.
It is important to purchase designs from trusted companies that use high-quality components during the assembly process. It is worth comparing wall-mounted gas double-circuit heating boilers before purchasing.
Feature Set
If the device is used to heat water, then for both types of units choose an indirect incandescent boiler. In areas with a harsh climate, organize protection for the outer part of the chimney from freezing - most manufacturers install it in advance.
Modern models are equipped with numerous sensors and relays for a “smart home” in order to achieve maximum comfort.
How to choose - selection criteria
To heat individual housing, modern industry produces many models of double-circuit gas boilers. Which device is better to choose depends on the parameters and purpose of the structure. A successful purchase depends on suitable characteristics.
Power
This is the main parameter that influences obtaining the required comfort in a building. It is measured in kW and calculated taking into account the design features of the building.
For a full calculation, it is necessary to take into account: floor height, total area, the presence of windows, external walls and internal partitions, the material from which the load-bearing structures are made, insulation of partitions, walls, ceilings and interfloor ceilings. In everyday life, a simpler formula is used.
How to calculate sufficient power
A rough calculation is made by multiplying the area by a factor of 0.1, respectively, for a house with an area of 450 m2, equipment with a power of 45 kW will be required.
This is a simplified method of calculation and it is valid for central Russia. For the southern regions, a coefficient of 0.8 should be applied, and for the northern territories - 1.5. In addition, it is recommended to add an insurance reserve to the calculated power in case of abnormal temperature changes; for this you need to increase the value by 10%.
Formula for calculating boiler power.
Pros and cons of boilers
A distinctive feature is the low cost and the ability to save on the use of hot water. Advantages:
- High efficiency and small housing dimensions.
- It operates automatically, which increases the level of comfort during operation.
- The units are capable of operating without electricity for some time.
- Wide range of devices.
Among the disadvantages, one can note the high noise level in the case of using a turbocharged system. For a large room, installation of a floor structure or a special room is required.
Operating principle of an atmospheric boiler
Typically, atmospheric gas boilers are used for heating a private house or for individual heating of an apartment. The average power of the units is in the range of 15-40 kW. This figure is considered sufficient to heat a room up to 400 sq.m.
The atmospheric burner is the main heating device; it consists of the following parts:
- Nozzle;
- Burner head;
- Ejection tube with burner holes;
- Burner;
- Flame control sensor.
Atmospheric burners come in the following types:
- Single-stage - operate in “on” and “off” modes.
- Two-stage – capable of operating in reduced or full power mode;
- With flame modulation function - provide optimal gas supply.
To make it easier to understand the principle of operation of an atmospheric boiler, imagine that a heat exchanger is installed above a lit gas stove, and a ventilation duct is located above it.
A boiler into which air enters works in a similar way; combustion products are removed under the influence of natural draft. The presence of a chimney is the main condition for the possibility of installing and operating an “aspirated” one.
The main purpose of an open gas burner is to pre-mix gas with air and then supply the resulting mixture directly to the combustion zone.
An atmospheric gas burner ensures mixing of gas with air and subsequent supply of the mixture to the combustion zone
The efficiency of operation is due to the intensification of the flame due to the supply of oxygen and reduced fuel consumption.
Features of choosing boilers
Selection is carried out according to the following criteria:
- The size and specificity of the contour material all depend on the number of people living in the cottage or apartment.
- Dependence on the energy source - advanced models will consume more, but the comfort level of using such a device is much higher.
- If additional room is allocated for the boiler, you can consider purchasing a model with an open section for burning fuel.
- Some imported devices are not able to withstand constant temperature changes in areas with cold climates.
- Evaluate the possibilities of additional functions - protecting the chimney from ice formation and take into account other features of the operation of the smoke exhaust system.
- The device must be protected against gas leaks - safety comes first.
Take into account the criteria described above in the article.
Single-circuit and double-circuit devices - what is the difference?
A single-circuit heating device differs from a double-circuit heating device only in that it is responsible only for heating the room. At the same time, a double-circuit boiler, in addition to heating, is also designed to solve issues of providing hot water supply.
Owners of single-circuit boilers solve DHW problems by installing additional equipment. Most often this is an indirect water heating boiler connected to the boiler. What is more efficient: a single-circuit boiler or a double-circuit boiler? We'll figure this out now.
The main advantage of a single-circuit boiler in conjunction with a storage heater is that water is heated to a comfortable temperature without cooling the home. Whereas, with significant water consumption in a double-circuit boiler, the circuit responsible for heating is automatically switched off, and the unit only works to heat the water.
A single-circuit gas boiler with an indirect heating boiler completely solves the issue of hot water supply without disrupting the operation of the heating system
The following factors should be considered before selecting a heater configuration:
- Heated housing area;
- Number of water intake points;
- Distance from water intake points to the boiler;
- Number of residents.
In a house with a small heated area, with economical consumption of hot water and close placement of water intake points, the optimal solution would be to install a double-circuit boiler.
If hot water is simultaneously consumed from several water intake points, the water temperature may be lower than required. In addition, with a large housing area, additional inconveniences arise. In double-circuit boilers, the priority is DHW; when hot water is consumed, the circuit responsible for heating is turned off.
But these issues are also resolved at the level of the unit design. There are double-circuit boilers that heat water in flow mode and are equipped with a built-in boiler.
The latter provide a supply of hot water of 30-60 liters, but at the same time gas consumption increases slightly. In addition, the weight of the boiler and its overall dimensions increase significantly.
A floor-standing gas boiler with a built-in indirect heating boiler provides an adequate supply of hot water
We can conclude that if the needs are met, the optimal solution would be to install a double-circuit flow-type boiler. If you want to have a sufficient supply of hot water at a comfortable temperature at any time without cooling your home, then it would be preferable to install a combination of a single-circuit boiler with an indirect heater.
In addition, if it is necessary to increase the need for hot water, the boiler can always be replaced with a larger capacity boiler. As a result, the price of such a combination will be higher than the cost of a double-circuit boiler, but the issue of hot water supply and heating will be reliably resolved.
Which company has a better wall-mounted gas double-circuit boiler - rating
The top models are based on owner reviews. Let's look at ten great alternatives for a private home.
Oasis BM-16
It is used only indoors where the temperature is maintained above +5 degrees. Ideal for a small house in the village. It quickly heats the air and has sufficient efficiency. Equipped with a special water pumping system, which allows heating the second level of the building.
Capable of serving for 10 years, subject to proper installation and operation. Characterized by high reliability and affordable price.
Performs quick assessments with analysis results displayed on the screen. There are programmable timers. Before purchasing, pay attention to the dimensions - they are impressive.
Haier Falco L1P20-F21(T)
A double-circuit gas boiler with a bithermal heat exchanger is suitable for any type of residential building. Equipped with advanced electronics that protect against combustion and operation failure. A special board prevents overheating or decreased draft.
Power is 20 kW. The coolant heats up to 85 degrees. Among the advantages are the compact size of the case, low cost, the ability to maintain normal temperature in the room and a large number of security features.
MORA-TOP Meteor
Suitable for those who like simple controls - settings are done via an LCD display and knobs to change the main performance indicators.
Meteor operates due to a closed fuel combustion section. A special control unit is responsible for temperature regulation - most operations are carried out autonomously.
Buderus Logamax U072-12K
A good alternative for a cottage or apartment. Characterized by easy operation and attractive design. The body is made of durable stainless steel. Assembly takes place at the factory of a company with a good reputation. The model is designed for areas with variable climates.
The U072-12K features Open Therm technology, which is known for its reliability and accurate signal processing. It is possible to adjust the temperature with an accuracy of one degree. Excellent resistance to voltage surges.
Viessmann Vitopend 100
This unit appears very often in ratings of the best double-circuit wall-mounted gas heating boilers. Available with a conventional chimney and a turbocharged smoke removal mechanism.
The design quickly realizes the thermal activity of the carrier, reaching 80 degrees, which can heat 11 liters of water per minute. Control is carried out via an LCD screen. During operation, the device does not make noise, which customers really like.
Navien DELUXE 16F White
A long service life, the presence of dual-circuit technology and the ability to withstand temperature changes have made Navien products in demand. If the room becomes too cold, the unit starts working without a “reminder” from the owner.
16F White uses resources sparingly, which increases its shelf life. Able to withstand fluctuations in power supply - heats well even when the pressure decreases.
Gaz 6000 W WBN 6000-24 C from Bosch
Purchased for premises with a total area of up to 230 m2. Powered by a closed combustion chamber and a plate heat exchanger. Warms up more than 10 liters of liquid per minute. Several sensors ensure safe operation. Control is carried out through a monitor that displays pressure.
After switching on, heating occurs very quickly. Masters are appreciated
Bosch Gaz 6000 W WBN 6000-24 C due to ease of installation. Excellent efficiency indicator and a large selection of parameter changes.
Navien Ace-24A Atmo
An excellent alternative for the client, capable of working under constant temperature changes. Economical, strong and durable. Withstands sudden changes in pressure. Low cost, reliable assembly and fast heating of the coolant.
Due to the special arrangement of the pipes, installation is very quick. The gas burner operates silently. The boiler is easy to use and safe. Buyers like the affordable price.
Baxi MAIN 5 24 F
A unit from Italy of excellent quality with a two-pipe exhaust system. Uses smoke removal technology and electronic automation. There are heating, draft and combustion level alarms. The high power rating makes it possible to heat the air in a room up to 200 square meters.
Changing parameters is carried out through the screen and levers responsible for regulating the temperature. There are all the necessary functions. There are many repair shops around the country to fix problems.
Proterm Gepard 23 MTV
One of the most popular variations that can be used inside any type of building. The manufacturer provides a long warranty and sets an affordable price tag. The device can be installed in an apartment or in a country house, even if there is no chimney from the inside. Coaxial technology is responsible for removing smoke.
The assembly is made with high quality, which ensures the strength of the case and internal components. There is an automatic air valve.
Wall or floor
Determining the type of placement of the device depends on the volume of the heated space and the possibility of allocating a special room for installation. For cottages with small living space (200-250 m2), it is better to use wall-mounted devices, and for solid structures it is recommended to install floor-mounted devices with increased power.
Double-circuit wall-mounted gas boiler.
Combustion chamber type
Devices equipped with an open chamber require placement on a separate area equipped with inflow and exhaust devices.
Devices with closed-type chambers are suitable for use inside residential premises; they are equipped with a coaxial combustion waste disposal system, and are installed in places where people constantly reside.
The best floor-standing condensing gas boilers for a private home
The peculiarity of condensing gas boilers is that energy is released not only during fuel processing. Energy accumulates at the moments when it turns into a liquid state, so the savings are obvious. Such boilers can be placed not only on the walls, but also on the floor. But do floor-mounted ones have special characteristics?
BAXI POWER HT 1.450 45 kW
The BAXI POWER HT 1.450 45 kW condensing gas boiler copes with heating private homes much better than the previously described models. What's the secret? This expensive single-circuit model has an efficiency of 107.5% with a maximum gas consumption of 4.91 cubic meters per hour of operation. The heating area reaches 338 square meters, so this gas boiler can be used for both a small country house and a huge cottage. It has a closed combustion chamber, so the risk of fire is minimal. I’m glad that the manufacturer paid a lot of attention to safety: the model turns off when water circulation is disrupted, overheating, pressure surges and other risky factors.
PROS:
- summer operating hours;
- “Warm floors” function;
- powerful circulation pump;
- Powered by a standard 220 W outlet.
MINUSES:
- the price is significantly higher than the market average;
- The weight of 60 kilograms somewhat complicates the installation process of the model.
Vaillant ecoCOMPACT VSC 306/4-5 150 30 kW
The main advantage of this heating equipment for private housing is its compactness. The gas boiler Vaillant ecoCOMPACT VSC 306/4-5 150 30 kW heats areas of up to 240 square meters, raises the temperature next to it to 80 degrees, while its height does not exceed 160 centimeters. This is not enough for a device with such power. The Vaillant brand also took care of safety: the device turns off when gas pressure drops, there is no draft, the flame intensifies or when the water overheats. It has a closed-type turbine, so the risks of fire or other problems with the equipment are minimal. But even this is not where the advantages of this gas boiler end...
PROS:
- there is a built-in boiler for 150 liters;
- circulation pump;
- summer mode, which ensures automatic selection of optimal indicators;
- power supply at a power of 220 W or more.
MINUSES:
- the price on the Internet is at least 200,000 rubles, which is at least a lot;
- The mass of the gas boiler is 129 kilograms.
The best floor-standing convection gas boilers for a private home
For a private home, especially powerful boilers are needed, so most often the choice of buyers falls on floor-mounted convection models. They quickly transform the microclimate in the house. Moreover, the devices are quite reliable and non-explosive. However, even among such successful models, leaders stand out.
Lemax Premium-20 20 kW
Convection gas boilers from Lemax have good power ratings. But even among representatives of the same brand, leaders stand out. Among them is the Premium-20 20 kW model. Yes, the thermal power of 20 kW is not as high as that of other models. But the advantages of this device lie elsewhere. It’s worth starting with the fact that it heats up to 128 square meters, and the quality of heating does not change with distance from the boiler. The maximum temperature is 90 degrees, while the gas consumption of 1.2 cubic meters per hour significantly saves money on meter payments. So the device successfully copes with its main tasks - reducing utility costs and successfully heating spaces in the house.
PROS:
- automatic shutdown in case of overheating, pressure loss, flame extinguishing and lack of draft;
- heats up to 128 square meters;
- approximate efficiency - 90%;
- The highest heating temperature during autonomous operation is 90 degrees Celsius.
MINUSES:
- there is no circulation pump;
- the chimney diameter is 130 millimeters, which is slightly less than the standard.
BAXI SLIM 1.230 iN 22.1 kW
The BAXI SLIM 1.230 iN 22.1 kW single-circuit gas boiler copes well with heating rooms up to 166 square meters. That is why it is suitable for installation in private homes or country houses. I am glad that the boiler has low fuel consumption - only 2.59 cubic meters for 60 minutes of continuous operation. It also has a relatively low power consumption, which does not exceed 15 W, so it can be connected to a standard home outlet, for example, 220 W. The model has successful consumer characteristics - an outside temperature sensor, a “Warm floors” mode and a circulation pump. We can’t keep silent about the fire protection system: the device turns itself off when the flame goes out, power outages, gas pressure drops, or the liquid inside freezes.
PROS:
- nominal gas pressure 20 mbar;
- approximate efficiency is 90.2%;
- the model has a small width, so it can be installed even when there is a shortage of space;
- detailed instructions to facilitate the process of using and setting parameters.
MINUSES:
- weight of 103 kilograms makes installation time-consuming and difficult;
- the price is higher than that of the previously described model.
Protherm Wolf 16 KSO 16 kW
The gas boiler model Protherm Wolf 16 KSO 16 kW can heat areas of up to 120 square meters, so it is often installed in miniature country houses. At the same time, the efficiency of the device is 92.5%, so fuel is not wasted just like that. The gas boiler has an open chamber, but all risks are covered by a high-quality fire protection system. The device automatically turns off when the gas pressure drops, when the flame goes out, when there is no draft, or when the water overheats. Therefore, this gas boiler can be installed in both residential and non-residential premises. The main thing is to have a professional do this.
PROS:
- nominal gas pressure is 13 bar;
- sleek design and durable white body;
- boiler power 16 kW;
- heated area is approximately 120 square meters.
MINUSES:
- there is no circulation pump;
- the chimney diameter of 130 millimeters is slightly less than the standard.
Which manufacturer should you choose?
Autonomous heating is not a one-day project. Your comfort not only today, but also in subsequent years, depends on the choice of boiler model and other elements of the system, so you should not save on equipment in this case. The only way out of this situation is to carefully study the existing offers on the market and take into account the reputation of the manufacturers.
Well-known companies and firms in the world that produce heating equipment try to maintain their brand and value their reputation. Boiler models from leading manufacturers are reliable, practical and easy to use. The slight difference in cost is compensated by the absence of problems with the equipment during operation.
However, you should not blindly believe in the reliability of models from foreign manufacturers. There are often cases when imported equipment turns out to be completely unadapted to our realities. The efficiency of a gas boiler can be affected by the quality of the coolant. It is also important to have a repair and maintenance base in your region. Buying a unit for which it is difficult to get components and spare parts, and which will also have to be repaired in a makeshift way, is the most ridiculous mistake. Take your choice responsibly in all aspects! The ideal choice is to purchase equipment adapted by the manufacturer to Russian conditions.
