One-pipe or two-pipe heating system: we evaluate which one is better to choose for a private house. What determines the efficiency of heating a house? Which heating system is better: one-pipe or two-pipe Which system is better one-pipe or two-pipe

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All heating systems today are divided into two main types: one-pipe and two-pipe heating systems. Each type has its own characteristics and features, but two-pipe heating systems have become the most popular. Sometimes people wonder, one-pipe or two-pipe heating system - what to choose?

Single pipe heating system

Such a heating system is a closed circuit, which is interrupted by the boiler. The installation of such a system involves the installation of a pipeline in all rooms located in the house. Radiators are connected to the pipes, and a coolant is launched into the system (its role is most often played by distilled water), which provides heat transfer to each room. The principle of operation of such a heating system is based on the difference in water temperatures at the beginning of the cycle and during the reverse movement, that is, the water that has passed through the entire circuit returns to the boiler cooled down.

Most often, this design uses the natural circulation of the coolant. To do this, the heated water first rises to the maximum possible height, after which it gradually descends through the pipes, cooling in the process of movement.

The following can be connected to a single-pipe heating system:

• thermostatic valves;
• radiator regulators;
• balancing valves;
• Ball Valves.

These mechanisms allow you to fine-tune the heating system for high-quality and uniform heating of the entire building.

Characteristic features of a single-pipe heating system

The most important advantage of a single-pipe heating system with natural circulation is the absence of the need for electricity. Instead, there is a significant drawback, which is expressed in a rather large diameter of the pipes and the need to create a constant slope of the pipeline.

Advantages of single-pipe heating over two-pipe:

1. Pipes can be connected to "warm floors" or heating radiators.
2. Such a system can be installed in any room, regardless of the layout.
3. A closed circuit allows you to heat the entire building as a single piece.
4. Such a system is much cheaper, since it requires a much smaller amount of materials.

When using a one-pipe system, the problem of "stagnation" of liquid in the pipeline very often arises. This problem is solved with the help of a pump that crashes into the system directly in front of the boiler, at the very end of the return.

In multi-storey buildings, a vertical one-pipe heating system is most often used, while a horizontal one is better suited for compact one-story houses. In this case, all heating elements are located at the same height, which gives rise to the following problem: the water that has cooled down in one radiator comes to the next already cold one. Such a system is much cheaper, but also has significant drawbacks.

Radiators in such a system are not controlled: a horizontal heating system does not imply free adjustment of each heater. If necessary, bypasses can be built into such a system, which make it possible to let the coolant bypass a separate radiator, but such a device will make the system more expensive. Turning off the radiator leads to the fact that the room begins to be heated due to the heat coming from the pipes or riser.

In addition, for the efficient use of this system, it is recommended to use heating elements of different sizes. To equalize heat dissipation, the radiator installed first should be quite small, and the last radiator should be much larger.

Two-pipe heating system

Despite the presence of a number of modifications, a two-pipe heating system works on the same principle. The heated liquid rises through the riser, from where it enters the radiators. But if one pipeline circuit goes to the radiators, then the cooled liquid is removed using the second circuit. This is what makes sense. Water in such a system comes directly from the water supply. For the normal functioning of the system, it needs an expansion tank, which can be simple or complicated.

In a simple one, there is a container to which two pipes are connected. One of them is a riser designed to supply water, and the second pipe allows you to eliminate excess fluid (read: ""). In a complex design, four pipes are installed, two of which are responsible for the circulation of the liquid, and the other two monitor the water level in the system and the tank itself.

Two-pipe heating systems work great in conjunction with a pump. Circulation can be carried out both with a passing flow and a dead-end method. In the latter case, the heated and cooled liquid move in the opposite direction. Both circulation circuits are of the same length, so all radiators provide equal heat dissipation.

A two-pipe heating system bypasses a single-pipe heating system in a number of ways:

1. Ability to precisely control the uniformity of heat supply in different rooms.
2. The system is well suited for heating one-story buildings.
3. Locking riser systems can be located in the basement, thus saving on the usable area of ​​the building.
4. There are practically no heat losses in this system.

Among the disadvantages of a two-pipe system is its high cost: the number of pipes will double compared to a single-pipe counterpart. In addition, air will periodically appear in the supply line, and to eliminate it, it is necessary to install taps.

Horizontal closed two-pipe circuit can be equipped with top and bottom wiring. The use of lower wiring allows you to add new heaters to the system gradually, as new floors are built (more: ""). The vertical system is well suited for houses with variable number of floors. In any case, a two-pipe heating system will cost more than a single-pipe one, but its use will provide much more comfort and convenience.

One-pipe or two-pipe heating system: advantages and disadvantages

In single-pipe systems, there are no return risers. The movement of the coolant in this case is provided by natural circulation or a pump. The cooled liquid enters the lower part of the system, and along the way it mixes with the coolant from the supply riser. The closed circuit ensures constant circulation of liquid in the system. Passing through the pipeline, the water cools, so the surface area of ​​​​the heater located further from the boiler must be larger in order to increase heat transfer.

Single-pipe heating systems can be built according to two schemes: flow and mixed (read: ""). The flow circuit completely lacks any bypasses, therefore, if one heating element fails, the entire system has to be turned off. This option is currently practically not used, since it is extremely irrational. However, single-pipe systems have a low cost due to a minimum of materials and simple installation. When installing such systems, top wiring is required.

Installation of heating systems

One-pipe and two-pipe heating systems are installed in different ways, and the installation of a suitable system will depend on the parameters chosen, and any specialist can calculate the installation cost. If natural circulation is chosen for the installation, then it will be advisable to install the upper wiring, and if there is a pump and there are no problems with the power supply, the lower one can be used.

In addition, methods for installing heating systems can be classified according to:

• type of wiring;
• the number of risers;
• pipe connection type.

The bottom pipe connection is the most common. Using this method allows you to run pipes under the floor or baseboard, which has a positive effect on the interior of the premises (more details: "").

The main classification of heating installation methods is still based on the chosen scheme. One-pipe and two-pipe heating systems have much in common, but the difference between them is too great to put them in the same row. The advantages of single-pipe heating lie on the surface: low cost and ease of operation. But this system also has enough disadvantages, and the most important of them is that if the area of ​​\u200b\u200bthe house is too large (more than 100 sq.m.) or if there is a second floor, the single-pipe scheme simply will not justify itself. In such cases, it will be much more profitable to opt for a two-pipe heating system.

The latter option also makes it possible to choose the appropriate method for installing radiators:

• sequentially;
• parallel;
• diagonally;
• on the side.

You can see the installation methods in detail in the photo.

The classification of installation methods can also be carried out according to the location of the risers:

• heating with horizontal wiring;
• heating with vertical wiring;
• heating without risers.

Conclusion

A single pipe system is cheaper and easier. The two-pipe system is more convenient and reliable. Regardless of whether a single-pipe or two-pipe heating system is installed in the house, space heating will still occur. The final choice depends on the homeowner, but still the two-pipe system has a large number of advantages, and its performance suggests that using such a scheme in your home will be more profitable and convenient.

In the video, a single-pipe and two-pipe heating system for comparison:

Sometimes it is very difficult for an uninformed homeowner to decide on the choice of a heating system. This problem is as old as the world. The debate over which is better - a single-pipe or two-pipe heating system, has been going on for a long time and has not subsided to this day. In our article, we will try to approach the issue objectively and impartially, having considered both schemes in relation to a private house.

Pros and cons of a single pipe system

To begin with, we recall that a single-pipe circuit is one horizontal collector or vertical riser, common to several radiators connected to it by both connections. The coolant, circulating through the main pipe, partially flows into the batteries, gives off heat and returns back to the same collector. The next radiator receives a mixture of chilled and hot water with a temperature lowered by several degrees. And so on until the very last radiator.

The main difference between a single-pipe heating system and a two-pipe one, which gives it some advantage, is the lack of separation into supply and return pipelines. One highway instead of two means fewer pipes and less work on laying them (piercing walls and ceilings, fastening). In theory, the total cost should also be lower, but this is not always the case. Below we will explain why.

Thanks to the advent of modern fittings, it has become possible to regulate the heat transfer of each radiator in automatic mode. True, this requires special thermostats with an increased flow area. But even they will not save the system from its main drawback - the cooling of the coolant from battery to battery. As a result, the heat transfer of each subsequent device decreases and it is necessary to increase its power by increasing the sections. And this is a cost increase.

If the line and the connection to the device are of the same diameter, then the flow will be divided approximately equally. This should not be allowed, the coolant will cool down greatly in the very first radiator. In order for a third of the flow to get into it, the size of the common collector must be made twice as large, and along the entire perimeter. Imagine if this is a two-story house with an area of ​​100 m2 or more, where a DN25 or DN32 pipe is laid in a circle. This is the second price increase.

If in a one-story private house it is necessary to ensure natural circulation of water, then here a one-pipe heating system differs from a two-pipe one by the presence of a vertical accelerating collector with a height of at least 2 m, installed immediately after the boiler. An exception is pumping systems with a wall-mounted boiler suspended at the required height. This is the third price increase.

Conclusion. A single pipe system is complex. It is necessary to calculate the diameters of pipelines and the power of radiators very well, to think carefully about laying highways. Then it will work efficiently and reliably. The statement about the cheapness of "Leningrad" is very controversial, especially when it is decided to assemble a circuit from metal-plastic pipes, you will simply go broke on fittings. Metal and PPR will cost less.

Pros and cons of a two-pipe system

All more or less understanding people know the difference between a single-pipe and two-pipe heating system. It lies in the fact that in the latter, each battery is connected with one supply line to the supply line, and the second - to the return line. That is, hot and cooled coolant flows through different pipelines. What does it give? Let's put the answer in the form of a list:

• distribution of water to all radiators with the same temperature;
• accordingly, the number of sections does not need to be increased;
• it is much easier to regulate and automate the entire system;
• pipe diameters for forced circulation are at least 1 size smaller than with a single-pipe scheme.

As for the shortcomings, there is only one worthy of attention. This is the consumption of pipes and the cost of laying them. But these pipes are of smaller diameter with a relatively small number of fittings. A detailed calculation of materials for one and the other system, as well as the nuances of their work, are shown in the video:

Conclusion. The advantage of a two-pipe heating system is its simplicity. The owner of a small house, having correctly determined the power of the batteries, can randomly make the wiring with a DN20 pipe, and make the connections from DN15, and the circuit will work fine. As for the high cost, it all depends on the material used, the branching of the system, and so on. Let's take the liberty of asserting that a two-pipe scheme is better than a one-pipe one.

How to convert a one-pipe heating system into a two-pipe one?

Since the difference between a single-pipe and a two-pipe system is the separation of the two streams, it is technically quite easy to make a conversion. It is necessary to lay a second pipeline along the existing highway, whose diameter can be taken 1 size smaller. The end of the old collector must be cut off near the last device and plugged, the remaining section to the boiler must be connected to a new pipe.

You will get a scheme with a passing movement of water, only the coolant leaving the batteries must be sent to a new line. To do this, one inlet section of each radiator will have to be reconnected from the old collector to the new one, as shown in the diagram:

It must be understood that in the process of alteration, one may encounter such difficulties as lack of space for a second pipe, the inability to punch a hole in a wall or ceiling, and so on. Therefore, before starting such a reconstruction, it is necessary to think over everything well. It may be possible to establish the normal operation of the existing one-pipe system.

Conclusion

In the field of private housing construction, the advantages of a two-pipe heating system over a single-pipe one are obvious. But the latter does not give up its positions, because it has many fans. In any case, the choice is yours.

Today, several heating systems are known. Conventionally, they are divided into two types: one-pipe and two-pipe. To determine the best heating system, you need to be well versed in the principle of their work. With this, it will be easy to make the choice of the most suitable heating system, taking into account all the positive and negative qualities. In addition to technical characteristics, when choosing, you must also take into account your financial capabilities. And yet, is a single-pipe or two-pipe heating system better and more efficient?

Here are all the details that are installed in each system. The most important are:

Positive and negative properties of a one-pipe system

It consists of one horizontal collector and several heating batteries connected to the collector by two connections. Part of the coolant moving through the main pipe enters the radiator. Here, heat is released, the room is heated and the liquid returns back to the collector. The next battery gets liquid, the temperature of which is slightly lower. This continues until the last radiator is filled with coolant.

The main distinguishing feature of a single-pipe system is the absence of two pipelines: return and supply. This is the main advantage.

No need to run two lines. It will take much less pipes, and installation will be simpler. No need to break through the walls and make additional fastenings. It would seem that the cost of such a scheme is much lower. Unfortunately, this does not always happen.

Modern fittings allow for automatic adjustment of the heat transfer of each individual battery. To do this, it is necessary to install special thermostats with a large flow area.

However, they will not help to get rid of the main drawback associated with the cooling of the coolant after it enters the next battery. Because of this, the heat transfer of the radiator included in the common circuit is reduced. To keep warm, it is necessary to increase the battery power by increasing additional sections. Such work increases the cost of the heating system.

If you make the connection of the device and the line from pipes of the same diameter, the flow will be divided into two parts. But this is unacceptable, since the coolant will begin to cool quickly when it enters the first radiator. In order for the battery to be filled with at least a third of the coolant flow, it is necessary to increase the size of the common collector by about 2 times.

And if the collector is installed in a large two-story house, the area of ​​\u200b\u200bwhich exceeds 100 m2? For the normal passage of the coolant, pipes with a diameter of 32 mm must be laid around the entire circle. To mount such a system, you will need a large financial investment.

To create water circulation in a private one-story house, you need to supply a single-pipe heating system with an accelerating vertical collector, the height of which should exceed 2 meters. It is installed after the boiler. There is only one exception, this is a pumping system equipped with a wall-mounted boiler that is hung at the right height. The pump and all additional elements also lead to an increase in the cost of single-pipe heating.

Individual construction and single-pipe heating

The installation of such heating, which has a single main riser in a one-story building, eliminates the serious drawback of this scheme, uneven heating. If something like this is done in a multi-storey building, the heating of the upper floors will be noticeably stronger than the heating of the lower floors. As a result, an unpleasant situation will arise: it is very hot upstairs, and cold downstairs. A private cottage usually has 2 floors, so the installation of such a heating scheme will evenly heat the entire house. Nowhere will it be cold.

Two-pipe heating system

The operation of such a system has some differences from the above scheme. The coolant moves along the riser, getting into each device through the outlet pipes. Then it returns to the main pipeline through the return pipe, and from there it is transported to the heating boiler.

To ensure the operability of such a scheme, two pipes are supplied to the radiator: through one, the main supply of the coolant is carried out, and through the other it returns to the common line. That is why they began to call it two-pipe.

Pipes are installed around the entire perimeter of the heated building. Radiators are installed between pipes to dampen pressure surges and form hydraulic jumpers. Such work creates additional difficulties, but they can be reduced by creating the correct circuit.

Two-pipe systems are divided into types:

Main advantages

What are the benefits of such systems? The installation of such a heating system makes it possible to achieve uniform heating of each battery. The temperature in the building will be the same on all floors.

If you attach a special thermostat to the radiator, you can adjust the desired temperature in the building yourself. These devices do not have any effect on the heat dissipation of the battery.

Two-pipe piping makes it possible to maintain the pressure value during the movement of the coolant. It does not require an additional high capacity hydraulic pump. The circulation of water occurs due to the gravitational force, in other words, by gravity. With poor pressure, you can use a low-power pumping unit that does not require special maintenance and is quite economical.

If you use shut-off equipment, various valves and bypasses, you will be able to mount such systems in which it becomes possible to repair only one radiator without turning off the heating of the whole house.

Another advantage of the two-pipe piping is the possibility of using any direction of hot water.

The principle of operation of the passing scheme

In this case, the movement of water along the return and main pipes occurs along the same path. With a dead-end scheme - in different directions. When the water in the system has a favorable direction, and the radiators have the same power, excellent hydraulic balancing is obtained. This eliminates the use of battery valves for presetting.

With different power of radiators, it becomes necessary to calculate the heat loss of each individual radiator. To normalize the operation of heating devices, it will be necessary to install thermostatic valves. This is difficult to do on your own without specific knowledge.

Hydraulic gravity flow is used during the installation of a long pipeline. In short systems, a dead-end circulation scheme of the coolant is created.

How is a two-pipe system serviced?

In order for the service to be of high quality and professional, it is necessary to perform a whole range of operations:

• adjustment;
• balancing;
• setting.

Special pipes are used to adjust and balance the system. They are installed at the very top of the system and at its lowest point. The air is discharged after opening the upper pipe, and the lower outlet is used to drain the water.

Excess air accumulated in the batteries is bled off with the help of special taps.

To adjust the pressure of the system, a special container is installed. Air is pumped into it with a conventional pump.

Using special regulators that help reduce the water pressure in a particular radiator, a two-pipe heating system is configured. After the pressure is redistributed, the temperature in all radiators is equalized.

How to make a double pipe from a single pipe

Since the main difference between these systems is the decoupling of threads, it is quite simple to perform such an alteration. It is necessary to lay another pipeline parallel to the existing highway. Its diameter should be one size smaller. Near the last device, the end of the old collector is cut off and tightly closed. The remaining section is connected in front of the boiler directly to the new pipeline.

A passing scheme of water circulation is formed. The outgoing coolant must be sent through a new pipeline. To this end, the inlet pipes of all radiators must be reconnected. That is, disconnect from the old collector and connect to the new one, according to the diagram:

The conversion process can cause additional difficulties. For example, there will be no place for laying a second highway, or it is very difficult to break through the ceiling.

That is why, before you start such a reconstruction, you need to think through all the details of future work. It may be possible to adjust the one-pipe system without making any alterations.

It is rather difficult to give an unambiguous answer to the question of which heating system is better single-pipe or two-pipe. each system is suitable for different situations. In this article, we will analyze the advantages and disadvantages of each of the systems and answer the question in what situations one or another scheme should be used.

What systems will be compared?

It should be noted right away that for comparison we will take equally well-functioning systems, i.e. one-pipe and two-pipe schemes, in which all heaters are heated to approximately the same temperature and are able to maintain the required temperature in a single private house. Those. we will not consider a one-pipe system in which, for example, the first radiator is heated to 60°C and the last to 40°C, because such indicators indicate that the system is not working correctly.

Therefore, it makes no sense to consider such a “non-working” system, even though such a single-tube will have some advantages over a similar two-tube, primarily in terms of cost. Such a single-tube at the initial stage will be cheaper, but in the future this cheapness will lead to unsatisfactory heating of the last radiators. That is why we consider only correctly working systems that will delight the owners of the house with equally heated radiators in all rooms.

Compared parameters

The following parameters will determine which heating system is better one-pipe or two-pipe and in what situations one or another system should be used.

Price

A single pipe heating system is more expensive. The high cost consists of two main factors:

• The need to increase the number of sections in each radiator next in the direction of circulation of the coolant. The single-pipe scheme consists of one supply pipeline, through which the coolant passes through the entire heating circuit, sequentially entering each heating device. From each radiator, the coolant exits a few degrees colder than when it enters the radiator (part of the heat, about 10°C, is given to the room). Therefore, if a coolant with a temperature of 60 ° C enters the first radiator, then a coolant with a temperature of 50 ° C leaves the radiator, after which 2 flows are mixed in the supply line, as a result of which the coolant enters the second heating device already with a temperature of about 55 ° C . Thus, after each radiator there will be a loss of about 5°C. It is to compensate for these losses that it is necessary to increase the number of sections for each subsequent heating device.

In a two-pipe scheme, there is no need to increase the number of radiator sections, because. each device receives a coolant of almost the same temperature. In the two-pipe there is both a supply and a return line, to which each heater is connected at the same time. After passing through the radiator, the coolant immediately enters the return line and is sent for further heating to the boiler. Thus, each radiator receives almost the same temperature (heat losses are present, but they are very small).

Note! The best application of a single-pipe scheme is in small heating systems, where there are no more than 5 radiators. With such a number of heaters, the coolant, passing through all 5 radiators in series, does not lose heat in such critical quantities as in single-pipe systems with a large number of heaters.

• The need to use an enlarged supply pipeline. If the supply pipeline is too “thin”, this will lead to the fact that many radiators simply will not get the heated coolant. A large diameter pipe allows you to deliver the heated coolant to as many heating devices as possible. The thicker the supply pipe, the fewer sections you need to add to each radiator.

Thus, an increase in the number of radiator sections and an increase in the diameter of the supply line makes a single-pipe system more expensive than a similar two-pipe system.

Economy

The two-pipe scheme is more economical in operation. As noted above, in order to achieve uniform heating of all radiators in a single-pipe circuit, the use of a “thick” feed is required, as well as an increase in the number of sections in the radiators. All this increases the volume of the coolant, and the more coolant in the system, the more fuel is required to heat it. Therefore, to the question of which heating system is better single-pipe or two-pipe in terms of efficiency, the answer will be in favor of a two-pipe system.

Mounting process

A single-tube system is more complex in calculations, because it is necessary to correctly calculate how many sections each subsequent heater should be increased. In addition, special attention must be paid to the calculation of the supply line and radiator connection.

Conclusion

The two-pipe scheme is most advisable to use in extended heating systems with a large number of heaters. It is an economical, efficient, easy-to-install system.

The single-pipe scheme, on the contrary, is most suitable for small systems in which there is a small number of heaters (no more than 5 radiators).

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Content

Today, there are a variety of ways to organize systems, among which heating on two wings with a pump has gained great popularity. Its device is made according to the principle of effective maintenance with minimal heat loss. The two-pipe heating system has become especially in demand in single-storey, multi-storey and private houses, the connection of which allows you to achieve all the necessary conditions for a comfortable stay.

What is a two-pipe heating system

Two-pipe heating has been used more and more often in recent years, and this despite the fact that the installation of a single-pipe version is usually much cheaper. This model provides the ability to adjust the temperature in each room of a residential building at will, because. a special control valve is provided for this. As for the one-pipe scheme, unlike the two-pipe one, its coolant passes through absolutely all radiators in series during circulation.

As for the model of two pipes, here a pipe is separately supplied to each radiator, designed to inject the coolant. And the return pipeline is collected from each battery into a separate circuit, the function of which is to deliver the cooled carrier back to the flow or wall-mounted boiler. This circuit (natural / forced circulation) is called the return flow, and it has become especially popular in apartment buildings when it becomes necessary to heat all floors with a single boiler.

Advantages

Double-circuit heating, despite the higher installation cost compared to some other analogues, is suitable for objects of any configuration and number of storeys - this is a very important advantage. In addition, the coolant that enters all heating devices has an identical temperature, which makes it possible to evenly heat all rooms.

The remaining advantages of a two-pipe heating system are the possibility of installing special thermostats on radiators and the fact that a breakdown of one of the devices will in no way affect the operation of others. In addition, by installing valves on each battery, you can reduce water consumption, which is a big plus for the family budget.

disadvantages

The above system has one significant disadvantage, which is that all its components and their installation are much more expensive than the organization of a single-pipe model. It turns out that not all tenants can afford it. Other disadvantages of a two-pipe heating system are the complexity of installation and the large number of pipes and special connecting elements.

Scheme of a two-pipe heating system

As mentioned above, a similar method of organizing a heating system differs from other options in a more complex architecture. The dual-circuit heating scheme is a pair of closed-type circuits. One of them is used to supply the heated coolant to the batteries, the other is to send the spent, i.e., cooled liquid back for heating. The application of this method on a particular object depends to a greater extent on the power of the boiler.

dead end

In this embodiment, the direction of supply of heated water and return is multidirectional. A two-pipe dead-end heating system involves the installation of batteries, each of which has an identical number of sections. To balance a system with such a movement of heated water, the valve installed on the first radiator must be screwed with great force in order to shut off.

Passing

This circuit is also called the Tichelman loop. An associated two-pipe heating system or just a ride is easier to balance and adjust, especially if the line is very long. With this method of organizing heating, each battery requires the installation of a needle valve or a device such as a thermostatic valve.

Horizontal

There is also such a type of scheme as a two-pipe horizontal heating system, which is widely used in one- and two-story houses. It is also used in rooms with a basement, where you can easily place the necessary communication networks and devices. When using this wiring, the installation of the supply pipeline can be done under the radiators or on the same level with them. But such a scheme has a drawback, which is the frequent formation of air pockets. In order to get rid of them, the installation of Mayevsky cranes on each device is required.

vertical

A scheme of this type is more often used in houses with 2-3 or more floors. But its organization requires the presence of a large number of pipes. It should be noted that a vertical two-pipe heating system has such a significant advantage as the ability to automatically remove air that exits through a drain valve or expansion tank. If the latter is installed in the attic, then this room must be insulated. In general, with this scheme, the temperature distribution over the heating devices is carried out evenly.

Two-pipe heating system with bottom wiring

If you decide to choose this scheme, then keep in mind that it can be collector or with radiators mounted in parallel. Scheme of a two-pipe heating system with a lower wiring of the first type: two pipelines depart from the collector to each battery, which are supply and discharge. This model with the wiring of the lower type has the following advantages:

• installation of shut-off valves is carried out in one room;
• high level of efficiency;
• the possibility of installation in an unfinished object;
• overlapping and adjustment is carried out easily and simply;
• the ability to turn off the top floor if no one lives there.

With top wiring

A closed two-pipe heating system with an upper wiring is used to a greater extent due to the fact that it is devoid of air pockets and has a high water circulation rate. Before making a calculation, installing a filter, finding a photo with a detailed description of the scheme, it is necessary to compare the costs of this option with the benefits and take into account the following disadvantages:

• unaesthetic appearance of the premises due to open communications;
• high consumption of pipes and necessary materials;
• the appearance of problems associated with the placement of the tank;
• rooms located on the second floor warm up somewhat better;
• the impossibility of location in rooms with large footage;
• additional costs associated with decorative trim, which should hide the pipes.

Connecting heating radiators with a two-pipe system

Installation work related to the installation of double-circuit heating includes several stages. Radiator connection diagram:

1. At the first stage, the boiler is installed, for which a specially designated place is prepared, for example, a basement.
2. Further, the installed equipment is connected to an expansion tank mounted in the attic.
3. Then, a pipe is drawn from the collector to each radiator battery to move the coolant.
4. At the next stage, pipes for heated water are again drawn from each radiator, which will give them their heat.
5. All return pipes form a single circuit, which is further connected to the boiler.

If a circulation pump is used in such a circuit system, then it is installed directly in the return circuit. The fact is that the design of the pumps consists of various cuffs and gaskets, which are made of rubber and do not withstand high temperatures. This completes all installation work.

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