The boiler is cast-iron solid propellant double-circuit. Economical solid fuel double-circuit long-burning boiler

At present, double-circuit solid fuel boilers for heating a private house. Such popularity is due to the simplicity and reliability in operation, efficiency and affordable cost. Briquettes, coal, firewood can be used as fuel, which is especially important in the absence of the possibility of connecting other heating equipment (electric, gas, etc.).

Design features

Unlike single-circuit models, a double-circuit solid fuel boiler heats the coolant not only for heating system but also provides hot water. The equipment is equipped with two tanks and a heat exchanger that passes through both tanks. The heat carrier for the heating circuit is heated in one boiler, the water is heated in the second.

In addition to tanks, the following main components can be distinguished in the structure of the boiler:

• The combustion chamber.
• Zone of aeration and combustion.
• telescopic tube.
• Air distributor.
• Switch flap.
• Auto
• Air heating chamber.

Some dual circuits provide the user with the opportunity to make a supply of fuel. A certain amount of briquettes are placed in the chamber, their supply to the furnace will be carried out automatically with a specified time interval. Equipment long burning can operate in this mode up to 8 hours.

Water can be used as the heat carrier in the heating circuit. This is the safest, and most importantly, inexpensive option for private households in which a double-circuit solid fuel boiler will be heated daily.

If in cold period year, a long absence of the owners is planned, it is advisable to give preference to antifreeze. Since at negative temperatures, the water in the pipelines will freeze, which will provoke an accident.

Advantages

disadvantages

• For stock placement solid fuel additional space is required.
• Significant weight and dimensions require a separate room or a specially equipped place with good ventilation.
• Solid fuel double-circuit boilers for the home require regular Maintenance ash pan, combustion chamber, etc.).
• To remove the products of combustion, a chimney with good draft is required.
• Irrational use in summer period fuel (when only hot water is required).
• In the hot water circuit, it is impossible to maintain and regulate stable heating.
• It is impossible to switch to automatic control mode (control of the unit operation, manual fuel loading).

Principle of operation

When fuel is burned in the boiler unit, the coolant is heated for both circuits. In the first, water moves and passes through heating appliances followed by its return to the boiler. The second circuit is designed to heat water for household needs, which passes through storage capacity in the form of a coil for hot water supply.

As a rule, a double-circuit solid fuel boiler is additionally connected to a boiler, which will provide the ability to heat water from electrical network during periods when the equipment is not used for heating.

More efficient are double-circuit solid fuel pyrolysis or long-burning units. In the latter case high efficiency It is achieved by means of bottom combustion, that is, lateral and lower air is supplied to the combustion chamber (furnace), which ensures a long-term, smooth and efficient combustion process.

In the most advanced pyrolysis-type equipment, the fuel combustion process occurs more efficiently due to the afterburning of pyrolysis gases (volatile combustion products), resulting in the formation of additional heat for heating water.

When choosing a double-circuit solid fuel boiler (reviews below), it is important to correctly calculate the power, that is, the need for additional heat output to heat domestic water.

To ensure a year-round supply of water for hot water supply, it is necessary to additionally install a boiler equipped with a heating element for heating in the summer.

Popular models and consumer reviews

Equipment range of this type quite wide, manufacturers offer solid fuel double-circuit boilers for a private house (the price is indicated below) of various capacities, capacities and sizes. The choice depends on many parameters, including the required functionality, the area of ​​\u200b\u200bthe house, as well as the allocated budget. It is necessary to analyze all the main characteristics in the aggregate.

Consider the most popular models of these devices.

Buderus, Logano S110-2

This steel equipment is designed for floor installation. It is quite compact and can be easily mounted even in a small room. The boiler has good power and does not cause problems during operation. To manage its operation, it is enough to read the instructions.

Numerous additional functions simplify the maintenance process and the degree of safety of the unit. The manufacturer's warranty is 24 months, however, according to consumer reviews, boilers last much longer, but subject to correct installation and timely service.

Main characteristics:

• Country of manufacture - Germany.
• Unit power - 7-13.5 kW.
• Equipment weight - 154.9 kg.
• Types of fuel - wood, stone and brown coal.
• Chimney size - 145 mm.
• Efficiency - 78%.
• The cost is approximately 35,000 rubles.

Atmos D.C.22S

This is a pyrolysis type steel equipment that can handle home heating large area. Despite the high power, this boiler is quite compact, which is why consumers choose it most often. Models from other manufacturers with similar characteristics take up much more space. The unit is designed for wall mounting, which makes operation more convenient. It can be heated ordinary firewood, the volume of the combustion chamber allows you to lay large pieces.

Main characteristics:

• Country of manufacture - Czech Republic.
• Boiler power - 15-22 kW.
• Thrust - 23 Pa.
• Unit weight - 319 kg.
• Efficiency - up to 88%.
• The cost is about 110,000 rubles.

Dakon DOR12

This equipment has the following characteristics:

• Production - Czech Republic.
• Fuel - wood, coal.
• Chimney size - 145 mm.
• Equipment power - 12 kW.
• Boiler weight - 158 kg.
• Efficiency - 24%.
• The cost is about 34,000 rubles.

It is important to remember that in order to develop a project for a two-circuit heating system, it is required professional approach. Before construction begins, all thermotechnical calculations, which are needed to determine the power of the boiler unit.

Traditional heating equipment is gradually becoming history. The concept of a large capacious unit with high thermal efficiency, with all its advantages, cannot be used even in country houses. Such designs are being replaced by compact, functional and at the same time productive plants with program management. One of the most popular representatives of the new generation in this segment is a double-circuit solid fuel boiler that can serve both a summer house and a large cottage.

Unit design

The basis of the design is the combustion chamber. It receives fuel, after which it acts as a source of distributed heat. The circulation of heat flows is divided into two circuits, one of which is aimed at servicing water, and the second - exclusively for the function of heating the premises. But the features of the two-circuit system as such will be considered later. In addition to the circuits and the combustion chamber, a double-circuit solid fuel boiler provides for the presence of an ash pan, switching dampers, a draft regulator, telescopic pipe and air heaters. Depending on the modification, the design can be improved due to optional inclusions - for example, a fuel supply module, hob etc.

Principle of operation

In general, the operation of such furnaces is based on general principle conversion of combustion energy into heat. In traditional solid fuel boilers, fuel is supplied to the combustion chamber, after which heating of the walls adjacent to the structure is achieved. In this case, we can talk about several improvements that have increased the efficiency of the unit. First of all, this is the circulation of flows that are distributed throughout the house by a double-circuit solid fuel boiler for long burning. The price of such a design can be about 15-20 thousand, but the high performance of the boiler justifies this investment. can circulate air currents, and water - it depends on the infrastructure that was organized in the house and connected to the equipment. In addition, it is important not to forget about the introduction automatic systems controls that allow almost without user intervention to configure the control system for daily, weekly and even monthly intervals of independent work.

Main characteristics

Medium thermal power is 30-50 kW. This applies to medium category boilers, but there is also an industrial segment in which the power potential exceeds 100 kW. The volume of the chamber is approximately 50 cm 3 . But it is important to understand that this is only the main chamber - the secondary combustion chamber is about 20-30% smaller. In terms of manufacturing materials, the situation is generally unambiguous. Either steel alloys with heat-resistant coatings or cast iron are used. For example, double-circuit solid fuel boilers for heating a private house are quite justified to buy with a cast-iron body. At home, it is difficult to deform this metal, and if we are talking about steel, then there is a risk that it will burst from improper operation of the boiler. This can occur against the background of the interaction of the structure with increased thermal loads. In industry, on the contrary, the use of steel is more practical. In case of deformation, the enterprise will be able to repair the hull in normal mode, but the cast iron boiler in case of serious damage will have to be disposed of.

Features of a two-circuit system

Double-circuit units work on the principle of the same combined heat exchangers in radiator systems. In them, the air heating chamber is interfaced with the circuits in which the water is heated. That is, if in conventional single-loop models, first of all, thermal energy, then a double-circuit solid fuel boiler provides, in fact, the simultaneous heating of both air and water. Further, the water circulates through the heating channels or is used for DHW needs.

In a sense, such equipment is similar to boiler plants. But boilers are designed to work with gas fuel or with electricity. It is double-circuit solid fuel heating boilers that are rare, but their use justifies itself due to the availability of firewood, coal or other raw materials of the same type.

Features of models of long burning

The concept of long burning is implemented according to two principles. It has already been said in the description of the design that such boilers have an adjusting unit for blowing. Thanks to this mechanism, the user can increase or decrease the volume of oxygen entering the combustion chamber with high accuracy. Accordingly, minimizing the open space in the blower will provide less intense combustion. A small amount of firewood or the same coal will smolder longer. Also, double-circuit solid fuel boilers of long burning can contain two chambers. The first is the main combustion chamber, and the second is for the secondary processing of gas mixtures. That is, double combustion is carried out, which allows to produce more heat with less emissions. harmful products combustion.

Fuel raw material

The main sources of fuel are wood and coal. This is a traditional raw material, which is available both in terms of finance and availability in the markets. As before, these are the most popular types of fuel, on which double-circuit solid fuel boilers continue to operate even today. Houses that are located in regions without gas supply are quite justifiably heated with solid fuel. This is more profitable than the operation of electrical installations, although there may also be problems with transportation.

At the same time, homeowners are increasingly switching to more optimized combi boiler models that also allow the use of biofuels. For example, a double-circuit solid fuel boiler of this type can operate on pellets, wood chips and fuel pellets. It is not only advantageous in terms of price and transportation of raw materials, but also environmentally friendly.

Positive reviews

The main disadvantage of a classic wood-burning boiler is the problematic maintenance of it. Modern models of long-burning equipment provide for the complete combustion of secondary products, minimizing labor costs for cleaning. At the same time, the efficiency of units increases, which squeeze the maximum out of fuel raw materials through recycling. There are many advantages to the combined heat exchanger, which is supplied with a double-circuit solid fuel boiler. The price of such models at 20 thousand, of course, confuses a large part of interested consumers, but it is compensated by an optimized circulation system. In one heating station, both the DHW service point and the heating circuit are concentrated. In addition, many point to the isolation of the system, which increases the safety of equipment operation.

Negative Feedback

Along with the advantages of combined heat exchangers, the double-circuit boiler also adopted their disadvantages. The most significant is the intensive appearance of condensate during the maintenance of two heating lines. If the equipment is not properly maintained, according to many users, this leads to the need for serious repairs with replacement internal parts. In addition, double-circuit solid fuel boilers of long burning sin with a number of operational restrictions. Among them, the owners note the impossibility of loading loose fuel raw materials, problems in igniting an incomplete firebox, etc.

Conclusion

The choice in favor of double-circuit units with a long-burning system is more than understandable in modern conditions. Such a solution for a private house is justified both in terms of performance characteristics and cash costs. Another question is to what extent the use of solid fuel can justify itself under specific conditions. Since gas is the cheapest, and electricity, of course, is the most expensive in terms of costs, but it allows you to design very convenient and reliable units. Due to what, in this case, it is the double-circuit solid fuel boiler of long burning that will win, the price of which is not so different from alternative equipment and averages 15-20 thousand? First of all, such models are reliable. They do not require the introduction of special protection against fire and explosion, as is the case with gas boilers. As for the advantages over electrical counterparts, this is mainly minimum expenses during operation, but there is also a serious plus, which refers to high performance with fast heating.

Dual circuit household boilers long-term burning on solid fuels are used for heating rooms in residential buildings, public institutions and even in industrial workshops. This equipment is universal, it does not depend on engineering communications, and also quite economically: the flame in the combustion chamber is maintained for days. But the technique also has disadvantages, which sometimes make it difficult to use the heating system.

Design features

Double-circuit boilers provide both the operation of the heating system and water heating. Such models have two inlets and two outlets, one for each pipeline circuit. Single-circuit ones do not have such an opportunity and are intended only for heating rooms, they have one pipe inlet and one outlet.

At the same time, double-circuit solid fuel boilers are more expensive than single-circuit ones, although they are less economical, and also cannot provide a constant water temperature.

However, if you buy a single-circuit boiler together with a boiler, then the price of such a kit will be higher than when buying only one double-circuit boiler.

Another disadvantage of a double-circuit boiler is the inability to use circulation hot water. If the distance between the tap and the heater is significant, then the appearance of hot water will have to wait a few seconds. When the second tap is opened, the temperature of the jet may decrease, or cold water will begin to flow altogether.

A double-circuit boiler that runs on solid fuel is equipped with a cast-iron or steel heat exchanger. The first is quite massive, but durable.

Cast iron is not subject to corrosion, but temperature changes are harmful to it. In turn, the steel heat exchanger is not susceptible to temperature changes, and at the same time weighs little. Main disadvantage steel - frequent burnout, therefore, when buying a boiler for heating, it is better to take a model made of steel sheets of maximum thickness.

The steel heat exchanger is susceptible to condensate, so the temperature in the chamber during combustion should not fall below 65°C. Fuel is loaded into boilers manually or with automation. The last option involves the use of a screw or piston. There are no fully automated solid fuel boilers, so the combustion of raw materials must be constantly monitored.

Fuel types

Long-burning boilers differ from conventional ones in that they can work on one wood load for more than a day.

For some models, one load of coal is enough to provide heat to the premises of a private house continuously for 5 days.

Depending on the type of fuel used, boilers are divided into several categories.

Working on wood and coal

Wood-burning types are marked with the letter S, have an efficiency of 70-80%. Once every 3 days, the chamber of wood-burning boilers must be cleaned of accumulated ash. Any wood of coniferous or hardwood. How more density and caloric content of raw materials, the longer it will burn. The moisture content of the firewood must not exceed 20%, otherwise the fire cannot be maintained.

Coal - marked with the letter U, the efficiency level reaches 90%. Such high rate is achieved due to the fact that the combustion chamber is equipped with heat-resistant elements to avoid heat leakage. Coal of any classes and fractions is suitable for use, except when the boiler is automated. Then you need to follow the manufacturer's recommendations.

Pyrolysis and pellet

Pyrolysis units have a special structure that allows you to achieve the best combustion of fuel when high temperatures. They work on carefully dried wood. Pellet units are designed to burn fuel pellets. The advantage of pellets is low ash content with high calorie content.

Finally, there are universal models - all types of raw materials are suitable for their firebox. The combustion chamber can be loaded manually or automatically.

Comparison with electric and gas

Solid fuel boilers have such an undoubted advantage as independence from utilities. This equipment has proven itself in areas where there are interruptions in the supply of gas and electricity.

According to this criterion, only heaters operating on liquefied bottled gas or diesel fuel can compete with it.

disadvantages

The main disadvantage of a long-burning solid fuel boiler is the need for storage space for firewood, coal, peat or pellets. It is recommended to allocate a dry room for this, where the raw materials will be guaranteed to be protected from moisture. Outdoor storage is permitted only if the fuel will be under a canopy. Additional fuel can be covered with a tarp.

With this in mind, solid fuel boilers are best suited for heating the premises of a private house, and in apartments multi-storey buildings this equipment becomes uncomfortable and unsafe. Boilers running on gas and electricity are excellent for use in multi-apartment residential buildings.

The disadvantages of solid fuel heaters also include the need to constantly support the combustion of fuel, regularly laying new portions of raw materials. For long-term heating of water, again, it is better to use gas, diesel and electric boilers.

A question of price

If we compare the cost different types heating equipment, then the cheapest and most affordable will be a solid fuel boiler. Its operating cost is low, especially considering the relatively high prices for gas and diesel fuel.

The pellet solid fuel boiler is the most economical, since wood pellets are getting cheaper every year. The manufacture of this raw material is carried out from production waste and costs the manufacturer a few pennies.

Solid fuel boilers is a highly efficient equipment used for heating cottages, administrative buildings and industrial facilities. They can run on wood, sawdust, coal, briquettes and pellets and are indispensable in places where there is no centralized gas supply and there are power outages.

Types of solid fuel equipment

The classification of boilers is carried out on the basis of their functionality, the materials used and the principles of combustion.

Depending on the material of manufacture, two types of solid fuel boilers are distinguished.

• Steel units are lightweight and affordable.
• Cast iron models are heavier and overall, but their service life is much longer. They are practically not subject to corrosion, durable and withstand high temperatures.

According to its purpose, a solid fuel boiler can be single-circuit and double-circuit. The first is designed exclusively for space heating, the second, in addition to the heating function, also performs the function of heating water.

Water solid fuel boiler operates on classical scheme— Combustion of fuel occurs from the bottom up. Loading is carried out through the top door, and is ignited at the bottom through the firebox window, which is also used to clean the unit.

The safest and most durable are pyrolysis boilers. They are characterized by long burning technology. In this regard, boilers have certain advantages: efficiency, high performance, long work on one loading, environmental friendliness.

Sale and professional connection of boilers

Do not install solid fuel boilers yourself. Without knowing technical features, you may damage the equipment. We recommend entrusting the connection and installation of the boiler to our specialists.

The choice of a heating boiler in the house is a serious task. And if you have already decided on the type of fuel, then task number 2 that you face is the choice of the number of circuits for the equipment. And here it is already necessary to understand more carefully and in detail. Surely you have a whole bunch of questions: from the advantages of each type to the ease of installation and their capabilities. We will try to make a detailed comparison of these species on several points. Ready? Go!

Difference between single-circuit and double-circuit boiler

The name itself already partially gives the consumer an answer to the question: what is the difference between such boilers? Obviously - in the number of circuits.

Single-circuit heating boilers can only heat the rooms of an apartment / house. They are connected to a battery system (radiators) and heat water only for them. Such a boiler does not heat water for domestic needs: the consumer will have to take care of this separately.

Double-circuit boilers are capable of both heating the house and heating water for washing dishes, taking a shower and other household needs. Their design provides an additional heat exchanger for heating water. It comes in 2 types:

• heat exchanger flow type - in such boilers there is a "DHW priority" mode. If you need to take a shower or wash the dishes, then you need to set this mode: then the boiler will switch to the 2nd DHW circuit. Such models are suitable for small houses and apartments (up to 70-80 sq.m.), as low-power heat exchangers are built into such models.
• Boilers with integrated storage boiler - The volume of the tank on average varies from 150 to 180 liters. They can heat water both in storage mode and in flow mode. However, it is worth considering that in the latter case (with the flow method), the water will be slightly colder than with the storage method.

The principle of operation and the device of a double-circuit boiler

This model is initially equipped with an additional heat exchanger for domestic hot water: it contains water from cold water systems(cold water supply) is heated by the hot coolant of the primary circuit (heating). To organize the work, the manufacturer provided a special valve, which controls the direction of movement of the coolant.

In all double-circuit boilers principle of priority DHW systems . Now let's explain what it is. When the valve is in a certain position, the heated coolant moves into the heating system, and the house begins to warm up. However, if someone from the household opens a hot water tap, the boiler will immediately stop heating water for heating the house and start heating it for the DHW system.

It turns out that during use hot water the heating circuit of the house is inactive. At the moment when the hot water tap closes, the boiler instantly sends the coolant to the radiators.

Thus 2 circuits cannot work at the same time.

Double-circuit boilers can work on 1 or 2 points of water intake. If there are 2 points, then it is better to place the boiler approximately in the middle between them. If there is one, then as close to it as possible.

The fact is that it takes time to heat water: if you open a hot water tap, it will first flow cold liquid, and only then - warm. The further the boiler is located from the tap, the longer you will wait for hot water to arrive.

The principle of operation and the device of a single-circuit boiler

Their design has only one heat exchanger, which heats water for the heating system. If you want it to supply you with hot water, then you will need to buy and install a boiler separately. indirect heating.

The main elements are the combustion chamber, in which are located burner and coil. On top of the latter is the heat exchanger. Fluid can circulate natural way or with a circulation pump.

By the way, all models are designed in such a way that in the future you can connect this boiler to them.

In this case, the system will work in the same way as a double-circuit boiler system: based on the DHW priority principle using a valve that controls the movement of the coolant from one circuit to another.

Pros and cons of a single-circuit boiler

The most important thing that influences our choice is the advantages and disadvantages of a particular model.

pros

• More low cost compared to the dual model. The cost of buying, installing and maintaining such a boiler will come out significantly less than for its counterpart with two circuits.
• High power and efficiency. Many single-circuit models have a floor-mounted installation method, which, in turn, allows manufacturers to use a cast-iron heat exchanger instead of a steel one. And cast iron, as you know, has a higher heat capacity, which means faster and more efficient heating of the coolant, which means that such boilers can even cope with heating large areas(more than 100 sq.m.). In addition, boilers cast iron heat exchanger can be used for old-type heating systems, which is also important.
• Less consumption gas- it is quite logical, since such boilers have only 1 circuit. However, when connecting the boiler, the flow rate will be significantly exceeded.

Minuses

• Only home heating possible- as we said above, if you buy a "naked" single-circuit model, you will be provided only with heat. To be able to heat water for hot water supply, you will have to take care of installing an BKN (indirect heating boiler). To do this, you will need to select it, buy it, the appropriate parts for its installation, etc.
• Separate room required- it is better to install the boiler and the boiler in a separate room, since the pipe decoupling system will not look very aesthetically pleasing, and it will take up a lot of space.

Pros and cons of a double-circuit boiler

We need similar information about double-circuit boilers.

pros

• Small dimensions- since the design of boilers with 2 circuits was originally designed for heating and hot water, it does not need to be supplemented with anything. And this means that the model of what size you bought initially, how much space it will take from you.
• Possibility of accommodation in a utility room- unlike a single-circuit boiler, you do not need to look for a place for a boiler room to place the boiler there. All piping and connections look very neat and take up little space. Suitable for houses and apartments with a lack of free space.
• Easy operation - as mentioned earlier, the second circuit is responsible for heating the water. So you do not have to suffer with the selection and connection of the BKN, as well as the necessary fittings for this component.

Minuses

• Unstable water pressure and coolant temperature- this is especially noticeable if the boiler operates at 2 points of water intake. Due to the not very high power of the equipment, tap water may not always flow with strong pressure and not as hot as you ordered. By the way, single-circuit with a boiler does not have such a problem.
• High maintenance requirements– the second heat exchanger of the boiler (for DHW) is very sensitive to elevated content salts in the coolant and very quickly becomes overgrown with scale and plaque. Therefore, you need to regularly clean the equipment or monitor the content of impurities in the coolant.
• More high price – compared to a single-circuit boiler WITHOUT an indirect heating boiler. Of course, if we take into account the purchase and installation of the BKN, then the double-circuit boiler comes out cheaper.

Power and dimensions

These are the first two parameters by which we will compare our “competitors”.

Power

So, first let's take a look single-circuit heating boiler.

It is quite easy to calculate the power of the device: for 10 sq.m. area requires 1 kW of power. Plus, don't forget the 20% margin. Everything is simple here. However, special attention should be paid volume of indirect heating boiler, which you plan to install on a single-circuit unit. It is in it that all the "salt" of choice is enclosed. If you choose a boiler with a boiler included in the package, then on average its volume will be 100-120 liters. With economical consumption, this amount of water is enough for 2-3 people. However, you can forget about frequent bathing in the bathroom.

If you choose BKN separately, then you should already proceed from the preferences of your household. Yes, for large bath you will need a boiler with a volume of more than 300 liters.

Double-circuit boiler: its power is the most important parameter when choosing, because it depends on it what temperature and what pressure water will flow from the tap. If you have 1 water intake point and you plan to use only a shower, then on average a 10 kW boiler will be enough for you. For those who like to periodically take a steam bath in the bathroom, equipment of 18 kW will be required. But for a stable supply of water to both points of water intake at the same time, we recommend buying a 24 kW boiler. With less power

Dimensions and compactness

As we have said before, a double-circuit heating boiler is much more practical in this regard than single-circuit, since it is already ready product without the need to connect anything extra. It can be installed in any room convenient for you.

For a single-circuit, you need to leave a lot of free space, since most likely in the future you will need to connect expansion tank, safety valve, the boiler itself, etc.

Equipment

This parameter is directly related to the dimensions of the device.

Double-circuit boiler- a finished product, a mini-boiler room, in the design of which there is already everything necessary for heating and hot water supply equipment (valve, circulation pump, fittings, etc.) You do not need to purchase any additional devices - only pipes for supplying and discharging water, as well as for organizing a gas removal system.

Single-circuit boiler- This is the basic package. Separately, you will need to buy an indirect heating tank, a pump, membrane tank and other equipment for the full provision of the house with heat and hot water. Wall-mounted single-circuit boilers, which are equipped with some of the necessary nodes, have a larger package.

Features of the operation of single-circuit and double-circuit boilers

Finally, we will give you a few useful tips which will ultimately help you make your choice.

• If you have opted for double-circuit boiler, then you need to know one of its features: after opening a hot water tap, you will have to wait for some time (several minutes) until the cold water becomes warm. This is a serious drawback, since, firstly, it is inconvenient to stand and wait for it to merge. And, secondly, at this time the water meter will be actively spinning. That is, every time you will simply drain money into the sewer.

In order to somehow compensate for this drawback, experts recommend placing the boiler no further than 5-7 meters from the water intake point. Greater distance significantly reduces the efficiency of work.

• In single-circuit devices, this drawback is not present, but there is another one. If you do not immediately consume the heated water in the BKN, then it will cool down and heat up again. As a result, energy will be constantly spent on its heating.

Conclusion

So which boiler is better: single-circuit or double-circuit? There is no definite answer to this question - each family chooses a device according to their needs and conditions.

If you are for saving fuel and space- then you should definitely opt for a double-circuit boiler. It starts to heat water only when there is a need for it. For comparison: a single-circuit will turn on every few hours - when the water in the boiler cools down.

Also, double-circuit ones are preferred by residents of apartments in which there is not as much free space as the owners of their cottages.

If you're up for convenience and more high reliability - then single-circuit - your choice. None contrast shower if the second tap is open, and weak pressure water.

The choice between single-circuit and dual-circuit: video

Be sure to watch this video, it will help you make your choice:

We hope that our article has given you a rough idea of ​​​​these two types of boilers, and you have already made your choice. Good luck!