Are you going to buy an effective gas boiler capable of providing warmth in the most severe frosts? When choosing equipment for the house, you have to take into account the set of factors. What is the best option? What criteria are the most important? Over the solution of this task, it is necessary to conceive owners and private houses, and apartments.
Agree, it is insulting to pay half and eventually to get a not enough functional boiler that is not able to warm the country house with the onset of cold weather. Therefore, before choosing a gas boiler in the store, you have to weigh all the "pros and cons". Otherwise, you can take a far from a suitable model.
We will help you to determine the basic criteria that radically affect the choice. Useful recommendations and important nuances are set forth in our article. To help the homeowner shows photographic materials and a selection of videos with tips experienced experts in the field of heat supply.
The absence or permanent interruption of centralized heating and hot water supply forced the owners of cottages and urban apartments to create.
Their main element is the boiler, which, by burning fuel, heats the coolant for the heating system and water for household needs.
The choice in favor of gas equipment is due to the efficiency of use as a fuel of gas. All other options for combustible fuel are more expensive or give fewer heat.
Plus, modern heaters of this species do not require constant supervision. I connected the installation to the trunk tube or cylinder, and it is uninterrupted, while there is something to burn.
The use of natural gas is optimal on fuel costs and maintenance costs for maintenance of a private home heating
However, that the gas boiler function properly and in optimal mode, it is necessary to correctly select it when you purchase and regularly maintain after the connection.
There is a mass of differing in functionality and special modules inside models of this equipment. It should be approached to the acquisition of the heating unit on gas.
Choice criteria gas boiler A lot, but the main ones are:
All these questions are closely related to each other. Lack of space for a large aggregate or desire to mount in the kitchen The device with aesthetic appearance is forced to choose a wall model of less power than rather than outdoor option. And the need to heat the hot water for the washbasin and the soul makes you look for a boiler with two contours.
When choosing a heater, it should be remembered about the need to repair if the workshop for service There is no choice of the model nearby, it is worth searching for another option.
Modern thermal equipment has stylish appearance, filled with all sorts of sensors and can work in several modes.
Each gas boiler has an inside the body burner and a combustion chamber with a heat exchanger, but there are models with a circulating pump and other modules
First, gas in the burner is burned with an electronic system or piezoelectric element. Then, as a result of its combustion in the furnace through a heat exchanger, water is heated, which is sent to the contour of the heating system.
So work classic single-mounted models. To prepare hot sanitary water, you need to choose either connect the boiler.
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Hot water supply and high air temperature indoors are a deposit for a comfortable stay in it. Provide such amenities at the expense of urban services for a long time is not profitable, and it is inconvenient - the temperature is low, then high, perhaps even complete shutdown in the cold. In this case, it will be relevant to buy the best gas boiler for the house, which is capable of replacing a solid fuel boiler, and a boiler in one "face". Choose a suitable option for a large and small room will help our rating of the most efficient equipment.
From the proven companies allocated French de Dietric and a number of German - Wolf, Vaillant, Buderus, Viessman. In the lower price category work Italian companies (BAXI, FERROLI, FONDITAL, ARISTON). Increases revolutions not so long ago, the brand from South Korea - Navien. Eastern European manufacturers from Slovakia and the Czech Republic are leading in the budget segment - Protherm, Dakon, Atmos, Viadrus. Note best manufacturers In each niche:
The rating was compiled on the basis of a multifactoric analysis of the gas heating equipment presented in the market. The technique was compared in the volume of heated premises. This is what was taken into account when selecting candidates:
Such equipment is two types - single and two-door. The first is created to increase the air temperature in the room, and the second - for the same, plus additional heating water water. By type of installation, they are accepted to divide into outdoor and wall mounted, the latter are relevant in small rooms where the space is required to save. They are made of cast iron or steel. There are models with a built-in boiler. The minimum permissible power is 10 kW, and the maximum is 45 kW.
- A double-circuit gas convection boiler is designed taking into account operation in Russian conditions. Consumers quickly appreciated the advantages of the model: small dimensions, high performance, ease of installation and control. The useful quality of this boiler is that it easily transfers the voltage drops on the network and gas pressure. His working qualities will remain unchanged with indicators from 165 to 240 V and from 10.5 to 16 bar. The same concerns weather conditions. With strong wind Bosch Gaz. 6000 W WBN 6000-12 will work in powerful mode. In calm windless weather will automatically go to economical regime. The wall-mounted way of location and compactness make it possible to use the boiler in homes and small apartments. 
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Buyers also noted a well-thought-out security system. Bosch and here turned out to be at the height.
- boiler for heating in systems with forced or natural water circulation. A non-volatile gas boiler is advantageously allocated among the analogues of the service life. This was achieved thanks to high-quality steel, from which the combustion chamber was made. Another technological find of manufacturers is a heat exchanger coating. For it, heat-insulating enamel treated with inhibitory composition is used. 
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Despite the reliability of Lemax Premium-12.5, the buyers considered the insufficient configuration of the model by spare parts.
- This is a heater with two contours made in South Korea. In it is embedded expansion tank, Includes a pump for water circulation. Due to the thermal power of 9-24 kW, the work area is up to 240 square meters. m. Functions on the gases of two types - both on natural, and on liquefied. Remote control from the remote control is offered. Safety provides a closed combustion chamber. The heater is equipped with two nozzles to connect the pipe / removal of recycled products and air loading.
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Wolf CCG-1K-24 - two-circuit heater of convection type of German quality. His burning chamber is isolated, and the removal of smoke occurs automatically. Works at power from 9.4 to 24 kW, with standard ceilings heated area up to 240 kV. m. Allows the use of the remote control. Accessories are provided by leading manufacturers. The set includes a circulation pump - Grundfos, valve regulator - SIT, improved system electronic control Depending on weather conditions. Monitor the temperature in the room and the appropriate sensors are allowed on the street.
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Wolf CCG-1K-24 is most often chosen for rooms with limited space.
BAXI SLIM 2300 FI - Convection two-rounded heater with a built-in boiler for 60 liters of outdoor execution from the Italian manufacturer of thermal equipment. The combustion chamber is closed, and the power is 17-33 kW. The area of \u200b\u200bheated premises under standard ceilings does not exceed 300 square meters. m. There is a heat exchanger from cast iron and electronic system self-diagnosis. To connect a "warm" water floor with an independent temperature regulator, a separate circuit is provided.
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BAXI SLIM 2300 Fi is a universal model that allows you to save on the purchase of a boiler or a gas column.
Protherm Bear 20 Klom - model of a condensation single-unit type of Slovak production with open system burning. Limit capacity - 17 kW. It is capable of heating no more than 160 square meters. m, power is adjustable by burner. For convenience, there is an electronic system of protection, settings and self-diagnostics. Water heats through a connected boiler. Available automatic burning products and forced ventilation.
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Gas boiler must be purchased for specific tasks and conditions for its use. For simple support for the air temperature in the room there will be enough single-circuit models. If it is also required to heat the water, then either two-circuit modifications are needed, or with the possibility of connecting a boiler. For premises of large and medium sizes, floor variations are best suited, and wall-mounted equipment will fit into small rooms.
It will be logical to bring the feature, taking into account the heated area:
About the criteria for choosing a gas boiler in detail the specialist in their repair in this video:
Advantages of staffing country house A gas boiler is obvious: "Blue fuel" is cheaper than electricity, and its stable deliveries instill confidence in the security of the heat without heat. Therefore, today in our article, we will see a rating of wall-mounted two-circuit gas boilers in terms of reliability. This type of boilers is the most popular and in demand.
Dual-circuit gas boilers solve two main tasks:
Stopping the choice on one or another unit, it is necessary to rely on the structural elements:
Dual-circuit gas boiler diagram Wall double-circuit gas equipment has compact dimensions, minor weight and relatively low cost. It fits perfectly into a small space, easily equipped with chimney, and is also suitable for heating space of up to 300 sq.m.
The line of these boilers of German origin is equipped with closed and open-type fuel chambers:
The ratio of durability, frost resistance, adaptation to electricity drops, increased noise insulation (≤36 DBA) put an aggregate to one of the high stages of reliability and quality.
Buderus Logamax U042 24K, having a modulated burner and a double heat exchanger, has a sufficient amplitude of power - from 8 to 24 kilowatt, which allows the equipment to function with minimal pressure in the system, in which other units work with errors.
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The German company Bosch has expanded its activities by expanding the production of gas boilers in Portugal, Turkey and Russia (Igels). Wall varieties of aggregates quickly gained popularity due to brand fame. A low price proposal also played a significant role in consumer demand.
Bosch GAZ 6000 W WBN 6000-24 C has a closed combustion chamber (turbocharged boiler) and some benefits to other rules of famous brands:
Possessing a standard set of functional features and equipment, this model It is quite competitive in the consumer market of the Russian Federation.
Gas boiler from the company Bosch - acceptable a budget option For a user who prefers famous trademark For low cost.
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Gas baxi equipment From the Italian manufacturer has proven itself to russian market Full competitor. Main 5 24 F model from Baxi represents the fifth generation of hot water units wall type. Compact dimensions of the boiler allow you to find a convenient place for it in the conditions of minimal space.
The main advantages of the presented model are:
The safety and management devices for the safety of the equipment are accompanying indicators of the reliability of the units.
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European quality, endurance and ease of management have been connected in the Protherm Gepard gas boiler from Czech manufacturers. With technical perfection, ease of operation, acceptability in price and maintenance, this instance with confidence is gaining rates of popularity among the Russian population.
Qualitative advantages of the Protherm Gepard wall boiler are characterized by:
With the right approach to installing the boiler, the equipment is able to serve not one dozen years.
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The turbated gas water heating equipment Navien Deluxe Production of Korea has proven itself with decent functionality, convenience of use, and, most importantly, high quality characteristics:
Important! When cooling the smoke, condensate is formed. When its volume in the boiler becomes high, the moisture is thrown out by a special outlet. It is necessary to connect the sewer pipe.
Using the remote control, which is included in the equipment package, you can program a comfortable room temperature.
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Standing before choosing an acquisition of a gas equipment, the consumer relies on a financial opportunity, the technical equipment of the unit, its high-quality and functional abilities, as well as cost savings and environmental characteristics. The German breeders of the company VIESSMANN managed to connect the listed parameters in the Vitopend water heater. Characteristic features Wall boilers of this brand are:
In the absence of provision of central gas supply and interruptions with electricity, you can choose a boiler on manual control. This will allow you to organize a heating system using a mechanical thermostat that does not depend on the drops of energy resources.
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Budget gas boiler wall-type Chinese production OASIS BM-16 is designed to be heated with an area of \u200b\u200bnot more than 160 sq. M and providing hot water supply. It is capable of functioning on a natural, liquefied and cylinder gas. The term of the guaranteed service is two years - not the only stated advantage of the device:
Boiler Oasis BM-16, like his European competitors, it has the possibility of installing one of the types of smoke removal to choose from: coaxial or separate.
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The effectiveness of the work of Czech gas aggregates of Mora Tor has once again proved high competence and competitiveness, releaseing a model range of METEOR boilers. From among many, they stand out:
The improved series of Mora-Top Meteor Plus boilers is equipped with automatics freely tuned by the consumer's desire. Automated management gives the technique of reliability.
Multi-level protection, providing Chinese gas equipment Haier Falco L1P20-F21 (T) uninterrupted operation, the duration of operation and high efficiency efficiency, allows the device to compete in the manufacturers of water heaters. Features to pay attention to:
Important! It is worth paying attention to the possibility of high-quality service of the unit in the geographic location where the gas boiler goes.
Wall-mounted or outdoor, single or double-circuit, with one or two heat exchangers, automatic or manual control - selection criteria gas technology Enough. The main thing is that the savings did not stand on the road safety.
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Modern gas wall double-circuit boiler - optimal choice For the heating of a private house. This device is small, reliable and perfectly copied with the performance of two tasks at the same time: heating at home and heated water for household needs. Diverse automatic systems Minimize care for the current service maintenance. Most wall models have compact sizes and attractive modern design.
Externally, such a boiler looks like a neat locker, so in the interior will fit perfectly. Inside are placed everything necessary elementsThe device you just need to connect to heating and DHW systems. Among other advantages of wall gas boilers, usually mention:
In size and performance, wall gas boilers differ significantly from each other. It is necessary to take into account a number of characteristics to select a model that will provide the house with heat and hot water without claiming unnecessary expenses.
Wall-mounted gas boilers usually have an attractive modern design and compact sizes, they are easy to put even in a small kitchen
Dual circuit walls gas models Usually stand markedly cheaper than one-connecting bundled with a boiler. Wall variant Such equipment is the most common and practical. Outdoor models - These are usually high power devices, or boilers with cast iron heat exchange, too heavy to accommodate on the wall.
A double-circuit gas boiler is a compact device, which is essentially a mini-boiler version. For water heating in such an aggregate provided flowing water heater, there is an expansion tank, one or two circulating pump, safety valve, temperature sensors and safety systems, pressure gauge, etc. For such a device, there is no need to allocate a separate room. It is usually placed on the wall in the kitchen.
The power of wall gas boilers is relatively small, usually about 30 kW. They are used to maintain premises with an area of \u200b\u200bno more than 200-300 square meters. m. It is recommended to install such a boiler as close as possible to the points of water-based, which should also be nearby, that is, the shower should be arranged next to the kitchen. Usually hot water is enough for servicing only one water fence point. If someone takes a shower, wash the dishes of hot water will be problematic. With too much distance between the points of water fence in the house heating will be extremely ineffective.
The figure shows a diagram of a wall-mounted two-circuit gas boiler with forced ventilation and two heat exchangers, which will help understand the principle of operation of the device.
In some models, natural traction is used, in others - forced ventilation. In the second case, it is not traditional, but a special. This is a compact chimney pipe, the installation of which is much simpler than the construction of a conventional chimney for the boiler on natural thrust.
Note! If you need to use multiple water intake points, it is recommended to pay attention to models that allow you to create a reserve of hot water of at least 60 liters. They are equipped with a built-in boiler and a special mixer, which makes it possible to maintain the temperature of the water unchanged at any level of water flow or pressure in the system.
Useful information about the choice of gas is presented in the video material:
When choosing an attached gas boiler, you should decide on the moments as:
Then it remains only to compare the characteristics of a particular model with these data and make a choice.
It is believed that one kilowatt heat is required to heat ten square meters of residential premises, i.e., for the house of about 200 square meters. m. You will need a model with a capacity of at least 20 kW. The data on the power of a particular model is in its technical support, and this information is usually specified directly on the packaging of the instrument. It should be remembered that the amount of heat required for heating a private house or apartment is essentially depends on the degree of heat insulation. Work should be carried out on the insulation of the room even before the acquisition of heating equipment. Approximately calculated the required level you need with the help of our calculator:
Since the outdoor temperature varies depending on the weather, it becomes necessary to regulate the operation of the gas boiler. The consumer today can choose the model C:
Single-stage adjustment involves the operation of the boiler in only one specific mode. To adjust too high temperature The coolant, the device will have to turn off. In models with two-stage power adjustment, you can choose one of the two modes of the device: for a colder and warmer outdoor temperature. This option is much more convenient in operation than a single-stage model. In addition, the ability to switch the operating mode of the burner increases the deadlines for the operation of the device. Models with three degrees of adjustment are also very convenient and serve longer. However, the cost of such devices is quite high, so consumers often choose the second option. It is necessary to take into account that there are many models of wall gas boilers can only work in one of two necessary modes, i.e., when the hot water is turned on, the unit stops heating at home and renews it only after the CRAND is closed. If such an equipment use does not suit the home owners, you need to pay attention to the models with a combined heat exchanger. The cost of such boilers is much larger than that of models with a conventional heat exchanger, but also the level of comfort they are provided significantly higher.
Almost all models of gas boilers leading Western firms are equipped with an electronic control unit. This element takes the use of heating equipment to a qualitatively new level. Automation allows you to set the optimal modes of operation of the equipment and timely indicates the need current service or repair.
The control panel of a modern wall-mounted double gas boiler is usually equipped with a liquid crystal monitor, which reflect specifications Device operations, as well as signals about possible faults
However, such a convenient solution has a number of shortcomings:
Elimination of these shortcomings will require additional costs, such as the acquisition of an electric generator and / or good source model. uninterrupted power. If it is decided to use the budget version of the equipment, it is better to find a reliable model with mechanical control.
Gas boilers on natural thrust are cheaper, however, models with a combustion chamber of a closed type are much more popular, although more expensive. Fan installed in such models to remove combustion products in such models. In the wall of the house make a small hole in which the pipe is derived. Installation of a boiler with a closed combustion chamber is much simpler because there is no need to mount a cumbersome box of the traditional chimney.
For two-circuit gas boilers with a combustion chamber of a closed type, a compact coaxial chimney is necessary, which will be removed on outdoor wall at home
If the house already has a ready chimney in suitable placeFor the sake of savings it makes sense to think about the acquisition of a model on natural thrust. To restore the old chimney channel or improve its characteristics, use special liners.
Excellent reputation and high quality equipment - not the only moments that should be paid to when choosing a wall gas boiler. Not all imported models are adapted to the realities of work in Russian conditions. Often such boilers are very sensitive to the quality of the coolant. Electronics fails with voltage jumps in the power grid.
Installation of the gas double-circuit wall boiler better instruct specialists, because it is necessary to correctly connect to the heating circuit and the circuit of the DHW, set the chimney and establish the operation of the equipment
An important point is the availability of service. In frosts, delay can become fatal for the whole heating system. The situation is also unacceptable when spare parts for repair have to be purchased in the neighboring region or even in a neighboring country.
One of the leaders in the gas equipment market is the German company Vaillant. Double-circuit models VUW ruler may have a closed or open Camera combustion (modifications of black turbotec and atmotec). Equipped with freezing protection, pumping pump and switching valve, provided mode using partial power, electronic ignition, control of the technical condition, convenient LCD display, etc. Especially for the Russian consumer on boilers vaillant. The sensor system is installed, isolated from the frame, as well as the built-in analog pressure gauge. The price of such an aggregate can be about $ 1100-1600.
No less popular gas boilers Viessmann. (Germany), having an efficiency of about 93%. The boiler can be connected to the PDA and configure depending on the temperature change in the room. Another advantage of these boilers - quick disconnect connections that significantly simplify installation. A number of models adapted to work in russian systems Heating. The price can be $ 650-1200.
Well-reliable and German gas boilers Bosch.which can work in parallel with sollar collector. If necessary, you can modify the design to work on liquefied fuel. The ionization control of the flame that does not allow the burner to fond, as well as a number of protective and controlling devices protect the device from breakdowns. Prices fluctuate within $ 650-1000.
The models of gas boilers "Chao-Nord" produced by the Italian Beretta company are equipped with a closed combustion chamber and are considered an optimal option for the northern regions. For these boilers are characteristic original design Control panels, an improved heat exchanger model and a three-speed "GRANDFOS" pump. The price of the aggregate can be $ 400-650.
Reliability and high efficiency made popular Protherm Gas boilers produced in the Czech Republic. Models of the Tiger series have modern panel Management, but those who are looking for a gas boiler with a simple push-button interface, you should pay attention to the Panther line. Increased protection against moisture allows you to install these units even in bathrooms. Price range is $ 600-2000.
A wide selection of gas dual-circuit boilers provides Italian ferroli Company. In addition to protection systems, self-diagnosis and electronic control, these devices are equipped with a special bimetallic heat exchanger, resistant to possible damage. Prices vary in the range of $ 350-1500.
Double-circuit gas boilers - convenient way Solve the issue of heating and supplying a private house with hot water. They are convenient to operate, have the highest efficiency and reliability, the main thing is to choose a boiler suitable in its characteristics.
The functionality of the two-circuit boilers is due to the characteristics of their design. They are equipped with two heat exchange contours, one of which warms closed system Heating, second - water for household needs.
Heating of the coolant in the first circuit is carried out in the combustion chamber of the gas. Water for gVS systems Heats at the expense of a hot heat carrier from the first circuit only at a time when you open a faucet with warm water. At the same time, the valve embedded in the boiler overlaps the flow of the coolant into the heating system.
Double-circuit gas boilers are presented on the market with a huge variety of models, and understand which they are better to choose them, sometimes it is difficult. Therefore for right choice It is necessary to clearly represent the characteristics you need.
These include:
This parameter depends on whether the boiler really is capable of long, efficiently and without overloads to carry out heating at home. Full heat engineering calculation, which services are performed by the service specialists, must take into account all the features of the structure:
It is quite difficult to perform this calculation yourself, therefore usually use a simpler method. It is enough to calculate the total area of \u200b\u200bheated premises, after which apply the formula:
P \u003d S 100/1000.
where P is the required power, kW;
S - Square in meters.
For separate standing at home With insufficient insulation, this indicator increases by 15% in moderate latitudes and by 30% in the northern regions.
Thus, for an apartment with an area of \u200b\u200b120 square meters, the rated power of the boiler - 12 kW, but for a private house built in the Moscow region, it is better to choose the power of at least 15 kW, and for a colder region - 20 kW. This will allow the boiler to work without overload.
It should also be paid to the performance of the DHW circuit. To calculate the consumption of hot water, you need to know the number of points of water intake in the private house and the likelihood of their simultaneous work. At the same time, the consumption of 400 liters per hour (6.6 liters per minute) is accepted for each point. If two or more points are turned on at the same time, this indicator needs to be increased in the calculated number of times.
The total boiler capacity sufficient for the heating of a private house and ensures it with hot water, it makes up the power of the heating system and the heat exchanger power for the DHW.
The method of installing the boiler depends on its power: Models designed for heating a private house with an area of \u200b\u200bup to 200-250 square meters, are usually available in the wall design. They are compact and not exceed in size, they can be placed in any convenient location, for example, in the kitchen or in the bathroom.
Such boilers are designed for hot water performance not more than 14 liters per minute and can simultaneously provide two points of water intake. To reduce losses, it is recommended to establish them near the consumers of hot water.
Boilers with a total capacity of more than 20 kW usually have an outdoor performance. Their sizes and weight are superior to wall models, and place them better in the boiler room with an equipped system of supply and exhaust ventilation. Requirements for a specific model depend not only on the size, but also on the principle of operation and the type of combustion chamber.
Gas boilers can be equipped with an open or closed combustion chamber. They differ in the way of supplying air into the burning zone. In the open chamber, the air suction occurs from the size of the room in which the boiler is installed.
Therefore, they can only be installed in the boiler room equipped with a window or supply ventilationOtherwise, the air indoors will become unsuitable for breathing. In addition, to ensure sustainable thrust and full removal of flue gases for such a boiler, it is required with a height of the vertical part of not less than specified in the passport.
Closed-type combustion chamber allows you to install a boiler in any room at home. For air supply and removal of exhaust gases, in this case, a coaxial chimney is used, consisting of two corrosion-resistant pipes located one to another. By inner trumpet Floom gases are out, and in space between the pipes, fresh air comes from the street.
In this case, the recovery (heating) of fresh air occurs, which has a positive effect on the combustion process. Coaxial chimney It can be removed horizontally through the wall. The thrust in this case is provided by the built-in fan. Wall-mounted models usually have a closed combustion chamber, so they can be used not only for home heating, but also in apartments. 
According to the principle of heat supply, gas boilers can be convection and condensation. The difference lies in the fact that in the convection heat carrier heats up in the combustion chamber, and the heat in the condensation is additionally used, obtained during steam condensation.
Plus a condensation boiler in its high efficiency - up to 96%. But him minus - Strict Requirements for the Heating System Device: temperature reverse waterentering the heat exchanger should not exceed certain values, usually 60 ° C, for which professional calculation and system setting and large expensive radiators are required. 
Self simple models Gas boilers do not require connecting to electrical network. Their functional is usually low - they have an open combustion chamber, require connecting to a vertical full chimney, and their starts are carried out only manually.
Modern models of gas boilers are connected to the power grid, they are equipped with automation, allowing you to make their work completely autonomous, without human intervention.
Two parameters important for convenience of use:
The cheapest models are single-stage. In them, the process of heating alternates with the wait mode. Upon reaching the specified temperature, the boiler stops the combustion mode, the heating will begin only after cooling the coolant to the lower permissible value. This can lead to uneven heating.
With a two-and three-step heating, the boiler automatically selects the burning intensity depending on the specified temperature, so that the coolant does not overheat, and the room temperature remains stable. The price of such models is slightly higher.
Type of ignition in gas bolery it happens hand - with a piezoelectric element, or electronic - In models equipped with a control unit. Piezorozigg after shutdown requires manual start, the electronic is turned on after a break in power supply or eliminate the emergency mode of operation of the boiler.
Other comfortable functions built into the gas boiler helps to make it work completely safe. They are equipped with almost everything modern models boilers. Such functions include control of the flame, traction, gas receipts and other combustion and heating systems.
You can find out the codes that are reflected on the display panel of the electronic control unit, some models also allow you to connect the GSM alert system by SMS.
Oriented only on the manufacturer of the equipment - not quite right, since most companies have a wide range of models with the most different functions. But the purchase of gas equipment from an unknown manufacturer even with a high-quality assembly carries a number of risks. therefore when choosing a manufacturer's firm should pay attention to such nuances:
