Gas boilers for heating private houses, country houses and cottages. How to choose, select, which one to buy in St. Petersburg, St. Petersburg

In small households and country houses there is often a need to arrange a special room for gas equipment. As a rule, heating units in such buildings are located not in separate boiler rooms, but inside the house.

In this situation, it is best to use a wall-mounted gas boiler as a heat source. Such units are small in size, you can simply hang them on the wall in the kitchen, they will not interfere and will not worsen the appearance of the room.

Features of wall-mounted boilers

In terms of design features, gas boilers have much in common with heating devices operating on other types of fuel, but they also have differences.

Design

Wall heaters are a complex of sensors, instruments and devices assembled in one housing.

Units of this type have the following design:

Gas-burner. It consists of several tubes with slot-shaped nozzles, assembled into a rectangular contour. This arrangement of nozzles promotes uniform and efficient combustion of gas.
Combustion (combustion) chamber. Designed for gas combustion. It contains the burner and heat exchangers. It can be open or closed.
Heat exchanger. It heats the liquid due to the heat generated by the combustion of gas. In the heat exchanger, water begins to move through the heat supply pipes.
Circulation pump. Helps the coolant move in the heating system.
Expansion tank. Carries out the selection of excess coolant when it is heated.
Device for removing combustion products. In boilers with natural circulation, it is a pipe that connects the combustion chamber to the chimney. For turbocharged boilers, a coaxial pipe with a fan is installed, which removes exhaust gases.
Electronic module. Using a set of devices and sensors, it controls the operation of the boiler according to the selected program. The built-in self-diagnosis system detects problems with the operation of the boiler and displays information about them on the display in the form of a code.

Advantages

A wall-mounted gas heating boiler has a number of advantages - this explains the increased demand for such models.

Pros:

Compact and modern design. The unit does not require a separate boiler room.
The use of a modulating burner and circulation pump provides higher efficiency compared to floor-standing models.
High level of equipment autonomy. There is no need for constant supervision of its work.

Flaws

When operating wall-mounted units, there are some difficulties that must be taken into account.

Flaws:

The need to obtain permits for the use of gas equipment.
The devices do not work during a power outage.
Relatively low power.
Increased demands on the quality of the coolant compared to floor-standing models.
High sensitivity to voltage surges.
The need for a mandatory protective grounding device.

Who is it suitable for?

Gas heaters are used in places where there is access to a natural gas pipeline. The operation of gas equipment is much more comfortable and economical than the use of heating units using other types of fuel.

Currently, the power of wall-mounted models produced ranges from 12 to 42 kW, which is enough to heat private houses and apartments with an area of 30 to 500 m². If there is only a need for heating, you can choose a single-circuit unit.

In order to provide housing with hot water for domestic needs, many models of wall-mounted boilers with two heat exchangers are produced. The devices are compact and do not require a separate room for installation; their use is optimal for small private houses and apartments.

Boiler malfunctions

Depreciation of equipment.
Emergency (extreme) situations.

In any case, the check must be entrusted to specialists who know the procedure from A to Z. First, diagnostics are carried out to understand the cause of the problem, and then the error is corrected. This will allow you to save money and end up with a device that works properly and has passed maintenance.

Of course, like any other equipment, double-circuit boilers have a number of standard faults.

Failure (breakdown) of the control module (automation). To avoid this, it is necessary to install a boiler voltage stabilizer, grounding and an insulating coupling for gas and water.

Starting problem - basically the combustion chamber needs to be cleaned.

AOGV malfunctions

Problems with this heating equipment can be either in the heating system or in the hot water supply. One thing is for sure: only a specialist can understand and repair the unit.

To prevent breakdown of a double-circuit boiler, you need to know the list of factors that lead to problems:

surges in gas or water pressure in the hot water supply and heating systems;
scale formation in heat exchangers;
lack of draft in the chimney, which leads to sooting of the passage in the coaxial pipe;
burner contamination;
overvoltage in the electrical network.

The service center employee must conduct a comprehensive diagnostic, which will help to understand the problem and prevent subsequent ones, since failure of one unit can lead to other problems.

Types by camera type

Depending on the design of the combustion chambers, there are 2 types of boilers: open and closed.

Open

In this case, air intake to ensure the combustion process occurs from the room where the boiler is located. Such devices are also called atmospheric. Exhaust gases are discharged through the chimney.

To take in the required amount of air and ensure trouble-free operation of the boiler, a ventilation pipe is usually installed, located in the same casing as the chimney. The height of the structure must be higher than the cut level of the roof of the house. If ventilation is poor, there may be a lack of air in the room, so the pipes need to be cleaned regularly.

Closed

Gas boilers with a closed combustion chamber are also called turbocharged. The air required for combustion is taken from the street. Exhaust gases are discharged through a coaxial pipe.

This type of chimney is a structure of two pipes inserted into one another. Exhaust gases flow out through a pipe of smaller diameter, and fresh air flows through the gap between them.

Both processes occur using a fan, which is why such a system is called a supply system. Outside air enters the chamber where the gas is burned, already heated, which contributes to a higher efficiency of the boiler. The coaxial pipe simply comes out of the wall to the outside.

The use of boilers with a closed firebox significantly reduces the requirements for ventilation of the room where gas equipment is installed. One of the disadvantages of such units is the noise that the supply fan makes during operation.

The equipment is also more expensive compared to open models. But this disadvantage is compensated by the absence of the need to install chimney and ventilation pipes.

Manufacturers of units

Today there is a fairly large list of manufacturers producing double-circuit gas boilers. Making a choice is quite difficult, since often in terms of characteristics there can be completely identical models, but at the same time very different in price. This is due to the quality of the components used and the assembly technology, which affects not only the efficiency of the entire system, but also the service life of the product.

It is also worth noting that when buying a product manufactured by a well-known company, you can be sure that the actual characteristics correspond to the declared ones. At the same time, such companies provide full and fast warranty and post-warranty service.

Conventionally, it is customary to divide the entire gas boiler market into three groups: Italian, German and others. The most well-established companies include the following heaters:

Vaillant (Vailant). A German company that has developed its own burner design, which has improved the reliability and performance of its products. Their boilers have excellent protection and are most often made of cast iron.
Protherm. It has been on the boiler sales market for more than twenty years. They produce inexpensive products of excellent quality with interesting designs.
Ferroli (Ferroli). This company from Italy constantly monitors new technologies, which it then implements into its products. The models they produce are reliable and easy to use, and their affordable price makes them the most popular manufacturers in the world.
Bosch (Bosch). This corporation has an entire division specifically dealing with heat and power issues. Although their products are not the cheapest, in terms of reliability they are the best company in Germany.
Rinnai (Rinnai). The models of the Japanese representative stand out for their functionality and high efficiency indicators. The engineers of this company developed a unique fan burner that regulates gas flow depending on the pressure in the system.
Buderus (Buderus). Combines well-known German quality with an affordable price. Economical fuel consumption, small size, unpretentiousness to the quality of the coolant attract buyers from all over the world.
Olympia (Olympia). The South Korean company pays special attention to equipment protection. Its designers have developed a unique double overheating protection system.

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.

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.

Recommendations for selection

Before you buy a wall-mounted gas boiler, you need to determine the required power for heating your home. This parameter is determined at the rate of 1 kW per 10 m² of heated area, with a ceiling height of no more than 3 meters.

Double-circuit units cope well with heating rooms and preparing hot water in households with an area of up to 250 m². In large cottages, the load on the heating system is much greater, so you should use a device with one circuit, and connect special equipment to heat the water.

When installing gas units with natural ventilation, it becomes necessary to connect chimney pipes. Turbocharged and condensing boilers can be installed in any room, subject to compliance with safety standards. They have higher efficiency, but are much more expensive.

Watch a video that talks about the design features of wall-mounted gas boilers.

Characteristics of gas boilers for heating private homes

Gas boilers for heating a country house today, unlike what it was 20 years ago, are reliable equipment that does not require constant supervision and is completely fireproof. It is available in a wide variety of options. We list a number of parameters by which devices differ from each other, although this is not a complete list. Knowing the characteristics will help you choose the best option.

The power produced by the equipment is measured in kilowatts. It determines what area and how many rooms the device can warm, how quickly the air heats up, and how stable the heat will be maintained. However, it is not worth taking equipment in excess, with a reserve in terms of characteristics - why overpay? You just need to carefully consider whether the equipment suits your needs before purchasing. Take into account what the housing is built from and how it is insulated. This is the task of a specialist engineer, whom you will definitely find in any serious company that sells boilers for heating country houses.
Type of fuel . It can be a different gas - methane, butane, propane. Cheaper models run only on methane, while more expensive models run on methane, butane and propane. There is equipment that uses the energy of liquid fuels - gasoline, kerosene. For places where there is no gas, an alternative to building a stove or an unsafe potbelly stove will be equipment that runs on solid fuel. This means coal or wood - and this is a very economical option, you just have to go to the forest to harvest it. So even in the wilderness, where there are no communications, you can install equipment and enjoy heating and hot water from the tap. Yes, yes, there are devices that heat not only the air in the pipes, but also water for washing and household needs, without a boiler. Or you can use a boiler, but it’s not so convenient. More on this below.
Number of circuits . Gas boilers for heating a cottage, and not only gas, but also solid fuel and liquid fuel, can be single-circuit or double-circuit. In practice, this means that single-circuit ones heat only the air in the rooms, or, to put it even more simply, they serve only for heating, while double-circuit ones, in parallel, constantly supply the building with hot water in the kitchen, in the bathroom, or in two or three baths - that’s how many you decide build. Most often, they buy double-circuit boilers for heating a country house, both gas, solid fuel, and liquid fuel, because it is very convenient. And single-circuit ones also require a boiler in addition. Well, the boiler is not suitable for heating water for a long time: so, wash it once quickly, and that’s it.
Possibility to connect a boiler . There is equipment with the ability to connect a boiler. That is, such a device will also heat water, but not for too long. So, if you have a large family, and they need to wash a lot, and you don’t want to wash dishes in cold water, then it’s better to take a double-circuit boiler for heating a private house and not have to worry about fussing with the garden. Yes, single-circuit devices are cheaper, sometimes even with a boiler in addition, but you are not building suburban housing for 10-20 years. Surely it will be passed on to children and grandchildren, so it makes more sense, if with an eye to the future, to pay more, but take dual-circuit equipment. Of course, if you don't have hot water. If it is available, then a boiler as a temporary measure in case of temporary shutdown of hot water is quite suitable.
Alternative equipment . There are electric devices - they are useful when gas is more expensive than electricity. For example, the village does not have a connection to the pipe or there is no opportunity to purchase cylinders with the same methane nearby. Then buyers consider equipment that runs on electricity. In addition, in villages without a gas connection, there are most often discounts on electricity, because it is used for cooking, heating, and heating water.
Thermostat . This device is necessarily present in good gas and electric boilers for heating a private country house. It is needed not only for convenience. For fire safety too.
Waste raw material disposal system . This refers to the removal of waste - burnt fuel. Every gas-powered model has this system.
Floor and wall gas boilers for heating a country house. However, there are electric, solid fuel, and liquid fuel systems. What is their difference? In terms of operating principle, there is no difference. And, in terms of placement... Of course, equipment that is designed to be hung on the wall is much more convenient to use. The space of the boiler room, the basement - the room where the equipment is located - is saved. Typically, such premises are located on the ground floor or basement.

The devices with the most variety in additional functions are double-circuit wall-mounted boilers for home heating, because they are more in demand on the market. Consequently, it is more profitable for the manufacturer to develop them, to hang them with all sorts of fashionable things - the story is exactly the same as with gadgets. Floor-standing models for housing are less popular, which is why they are less rich in additional functions. True, their price is more pleasant. The cost of floor-mounted ones is lower than that of wall-mounted ones.

Review of popular manufacturers and prices

There are many boilers on the market, both foreign and domestic. The most expensive are models from German manufacturers: Wolf, Vaillant, Bosch and Buderus. The products of these companies are famous for their quality. A wide selection of models is offered, which allows you to choose a boiler that meets any needs.

Products from Italian companies - BAXI, Ariston and Beretta - also have excellent characteristics, but are sold at lower prices. Domestic and ZhMZ gas boilers, as well as South Korean Navien, are in high demand. In terms of price-quality ratio, Navien brand equipment is gaining increasing popularity among consumers.

"Ariston"

The products are famous for their high quality workmanship; translated from Greek, “ariston” means “best”.

The company produces four lines of wall-mounted appliances of different modifications:

ALTEAS X. Premium line, the latest development of the company. Gas units have a built-in WI-FI module that is compatible with the Ariston Net application. The line has three modifications: ALTEAS 24 FF, 30 FF and 35 FF. The numbers in the names of the boilers indicate the rated power for which the devices are designed. The cost of the units is in the price segment from 50,000 to 70,000 rubles.
Ariston Genus. Premium-class equipment, considered second in functionality after ALTEAS X. The equipment has a liquid crystal display and can be controlled remotely from the control panel. The line is represented by models: Evo - a traditional double-circuit gas appliance with an open or closed combustion chamber and Genus Premium - a more expensive condensing boiler. The power range of all models is from 24 kW to 35 kW. The cost of Ariston Genus boilers ranges from 54,000–72,000 rubles, the price of Premium models can reach 85 thousand rubles.
Ariston Clas. Units with a large display and AUTO and COMFORT functions. Boilers are the optimal equipment for those who want to save money. Available with a power of 24–28 kW. The average cost is in the range of 25,000–30,000 rubles.
Ariston Egis. The most common model in Russia. Can operate at temperatures of -50 ºС. Has an electronic control unit. The price of models is from 27,000 to 34,000 rubles.

Prices for wall-mounted gas boilers Ariston

Ariston wall-mounted gas boilers

Watch the video where the Ariston Egis boiler is presented - the most popular model in Russia.

"Baksi"

One of the largest European manufacturers. Produces equipment for heating and domestic hot water supply (hot water supply). The company has representative offices in seven countries: Italy, Great Britain, Spain, France, Germany, Russia, Turkey, as well as in Eastern Europe and the Middle East.

Buyers often prefer the following models of Baksi wall-mounted boilers:

Baxi Main 4 and Main 5. Only these models have the heating and heating circuits combined in one heat exchanger. Therefore, these boilers are smaller in size compared to other models. Baxi Main 5 is available only with a closed combustion chamber. The power range ranges from 14 to 24 kW. The cost of Main 4 is 20-28,000 rubles, and Main 5 is 25-32,000 rubles.
Baxi Eco 4 and Baxi Eco Compact. A distinctive feature of these models is the use of an additional stainless steel heat exchanger. Range of powers from 14 to 24 kW. Baxi Eco Compact has small dimensions. Baxi Eco 4 costs from 21,000 to 27,000, and Baxi Eco Compact – from 35,000 to 44,000 rubles
Baxi 4 Tech and Baxi Eco 4S. Analogues of Baxi Eco 4 and Baxi Eco Compact, but more budget devices. Instead of copper ones, they are equipped with plastic supply tubes, which somewhat reduces the cost of the products.

Ferroli

The well-known Italian company produces a wide range of heating equipment, including wall-mounted units at very reasonable prices.

Ferroli line of gas appliances:

Diva;
Domina-N;
Arena;
Divatop Micro;
Divatop-H;
Divatop Micro-LN;
Divatop 60;
Domiproject-D.

The power of each of the models in the list increases by 4 kW: 24, 28, 32 kW. The cost varies from 24,000 to 42,000 rubles.

Prices for wall-mounted gas boilers Ferroli

Ferroli wall-mounted gas boilers

Bosch

A very popular German company whose products are famous for their high quality and functionality.

Produces the following series of wall-mounted gas units:

BOSCH GAZ 7000 W. Premium wall-mounted gas boilers. The main components of all models in this series are made of brass, without the use of composites. Single-circuit devices: ZSC 24-3 MFK, ZSC 24-3 MFA, ZSC 35-3 MFA with a power of 24 kW and 33.3 kW and costing from 50,000 rubles and 66,000 rubles, respectively. Double-circuit models: ZWC 24-3 MFK, ZWC 28-3 MFK, ZWC 24-3 MFA, ZWC 28-3 MFA, ZWC 35-3 MFA with a power of 24, 28 and 35 kW. Price range - from 55,000 to 68,000 rubles.
BOSCH GAZ 6000 W. Heating devices in this series are designed and adapted for Russian operating conditions. Single-circuit models: WBN 6000-18 H RN S5700, WBN 6000-24 H RN S5700, WBN 6000-35 H RN S5700 costing from 33,000 to 44,000 rubles. Double-circuit models: WBN 6000-18 WITH RN S5700, WBN 6000-24 WITH RN S5700, WBN 6000-12 WITH RN S5700, WBN 6000-35 WITH RN S5700, sold at prices ranging from 42 to 45 thousand rubles.
BOSCH GAZ 4000 W. The two-circuit unit ZWA 24-2 K will cost 31,500 rubles. The price of a single-circuit device ZSA 24-2 A is from 35,000 rubles.
Condens 5000W. High-power wall-mounted condensing units. Models BOSCH ZBR100-3 and BOSCH70-3 with a power of 99.5 kW and 69.5 kW, respectively, cost 244,000 and 219,000 rubles.

Watch the video for a description of the BOSCH GAZ 6000 W gas boiler.

Prices for wall-mounted gas boilers Bosch

Bosch wall-mounted gas boilers

Wolf

The German company has been on the market since 1963 and began with the production of devices for drying hops. Currently, it produces many types of climate control equipment, including a large number of gas heating heat generators of various modifications.

Models of gas units from Wolf:

GGU-2(K). Traditional boilers. Expensive materials are used in their production, which explains the high cost of the products. Depending on the power of the device and the configuration with various functions, the price ranges from 107,000 to 122,000 rubles.
GGG-1K. The units are of the classic type, but more budget-friendly. The cost varies from 57 to 65 thousand rubles.
FGG-K. Traditional appliances, the most budget option. The latest model FGG-K-24 costs from 39,000 rubles.
GGB-2K, GGB-2, FGB (-K). Condensing boilers. The most economical option in terms of gas consumption. They cost from 116,000 to 300,000 rubles.

Protherm

Gas equipment of the Proterm brand has been produced since 1991, the main production is located in the city of Slavice (Slovakia).

Proterm produces the following brands of wall-mounted boilers:

"Gepard" - two-circuit devices with a power of 12 and 23 kW. Hot water is heated in a steel plate heat exchanger. Prices are set depending on the region - from 35 to 40 thousand rubles.
"Jaguar" - two-circuit units in the basic version with a power of 11 and 24 kW. Equipped with a coaxial system. Cost - 30,000-35,000 rubles.
"Panther" - single-circuit and double-circuit boilers with a capacity of 12, 25, 30 and 35 kW. Price - from 35 to 55 thousand rubles.
"Tiger" is a coaxial two-circuit device with a power of 12 kW. Hot water is prepared from a built-in 45 liter boiler. It is installed in apartment buildings, country houses, and private properties. The price starts from 56,000 rubles.
“Lynx” - condensing units with a capacity of 18, 25 and 30 kW, developed by Vaillant Group engineers based on extensive experience in operating boilers operating with hard water and poor quality gas. Price - from 33 thousand to 45 thousand rubles.

"Neva Lux"

The domestic company BaltGaz produces various gas appliances, as well as spare parts and components for them.

Currently BaltGaz produces wall-mounted gas heat generators Neva Lux of the following categories:

BaltGaz NEVA Turbo - double-circuit convection units with a capacity of 11, 14, 18 and 24 kW. The price, depending on the region, ranges from 28 thousand to 32 thousand rubles.
BaltGaz SL 11/14/17 series are single-circuit units with the ability to connect them to an indirect heating boiler with a capacity of 11, 14 and 17 kW. Starting price - 17,000-18,000 rubles.
BaltGaz Turbo S - two-circuit devices with a closed chamber for gas combustion, power - 10, 11, 14, 18, 21 and 24 kW. The price of the units is 30,000-32,000 rubles.

Watch the video showing the new generation Neva Lux boilers.

ZhMZ

OJSC Zhukovsky Machine-Building Plant produces a wide range of gas floor-standing boilers; the production of wall-mounted appliances is not yet included in its program.

Vailant

Vaillant Group is one of the leaders in the production of heating equipment, which is supplied to 60 countries.

Vailant produces 7 model ranges of wall-mounted boilers:

VAILLANT TURBOFIT VUW - consists of only one double-circuit heating unit Vaillant turboFIT VUW 242/5-2, with a power of 24.7 kW. One of the features of the model is a copper primary heat exchanger. Costs 44,700 rubles.
VAILANT TURBOTEC PRO VUW. There is only one dual-circuit model Vailant turboTEC pro VUW 242/5-3 with a power of 24 kW. The price of the product is 62,000 rubles.
VAILANT TURBOTEC PLUS VUW. The series is represented by 5 dual-circuit models. The power of the units increases by 4 kW, starting from 20 kW and ending with 36 kW. Prices - from 69,000 to 100,000 rubles.
VAILANT TURBOTEC PLUS VU is a series of six single-circuit models. The power line starts from 12 kW and ends at 36 kW. Prices are lower than those of dual-circuit devices, from 56 to 89 thousand rubles.
VAILLANT ATMOTEC PRO VUW. The series is represented by one dual-circuit model with an open chamber for gas combustion. The power of the unit is 24 kW. You will have to pay 58,000 rubles for the product.
VAILLANT ATMOTEC PLUS VU - single-circuit units with an open combustion chamber. Presented in three models with 20, 24 and 28 kW of power. Prices range from 47 to 68 thousand rubles.
VAILLANT ATMOTEC PLUS VUW. Double-circuit boilers with an open combustion chamber. Three models for 20, 24 and 28 kW. They cost from 65,000 to 86,000 rubles.

Buderus

Another German company in the heating industry market. Like all “Germans”, they are distinguished by the high quality of their products. It has its own production in Russia.

Line of wall-mounted boilers from:

Condensing single- and double-circuit units Logamax plus GB172i. They are distinguished by innovative design, expanded functionality, power range: 20/28, 24, 30, 35, 42 kW. For such a device the buyer will need to pay from 84,000 to 117,000 rubles.
Single-circuit condensing devices Logamax plus GB162. They provide the possibility of creating a cascade of boilers, have high efficiency, power range: 70, 85, 100 kW. Cost - 200,000-260,000 rubles.
Condensing devices Logamax plus GB062. Single- and double-circuit devices with a power of 14, 20 and 24 kW. They cost 72,600, 74,700 and 76,000 rubles respectively.
Gas appliance Buderus Logamax U072. Used for heating and hot water supply, designed for Russian conditions. Power range: 12-18-24-35 kW. Very low-budget models, cost from 34,000 to 50,000 rubles.
Logamax U052/054. Single- and double-circuit gas heating heat generators Logamax U052 are closed type, and Logamax U054 are with an open chamber for gas combustion. Power range - 24-28 kW. The purchase will cost from 48,000 to 60,000 rubles.
Logamax U042/044. Logamax U042 double-circuit heating units are equipped with a closed gas combustion chamber and a bithermal heat exchanger. Logamax U044 is an open type boiler with a power of 24 kW. The price is 40,000 and 37,000 rubles, respectively. Read about a wood-burning stove for your home on our website.

Calculation of the power of a double-circuit gas boiler

The “heating equipment” of this model range has 2 types of heat exchanger in its design and is ready to cope with the assigned tasks 100%.

These devices generally have a power of 12–35 kW, which will perfectly heat a room whose total area is about 350–400 m². The capacity of the DHW system is about 8–12 l/min. When choosing a double-circuit boiler, you should first pay attention to the power, because it is this indicator that plays the main role. By choosing the best option, you can save a lot on heating your apartment/house and supplying hot water.

Power calculation formula

(1)Q = (2)k> • (3) • (4)T

1 - heat loss kcal/h.

2 - heat transfer coefficient of the building (walls, floor, ceiling).

3 - volume of the entire room (height x length x width). 4 - the difference between the air temperature in the building and outside. Measured for accuracy in winter.

Values of k depending on the type of building.

Tree - k = 3–4.
A well-insulated building, both outside and inside - k = 0.6–1.
Brick 1 layer - k = 2–3.
Brick 2nd layer k =1–2.

After you calculate the Q value, you must divide it by 860, only then will it be possible to determine the minimum boiler power that suits you to create comfort and coziness in your apartment or house. For these purposes, it is best to invite a specialist who can more accurately and correctly determine your “minimum”, since he will take into account such points as:

ventilation;
total glazing area of the house;
open windows and doors.

Only a correct calculation will help you choose the best option in terms of price and power, so that you don’t have to overpay for the boiler, and subsequently for heating and hot water.