When the boiler is working and heating properly, but the radiators and pipes are cold, the air is almost always to blame. Well, really, in 99% of cases. I practically never encountered any blockages inside the systems. But for some reason they are always looking not for air, but for a blockage.

Dmitry Belkin

Air in the heating system

Air in the heating system is one of the main reasons for lack of water circulation, cold radiators, specific murmuring noise and other unpleasant things. The topic is large and we will consider it gradually. This article is part of a series of articles about building heating “from A to Z”.

Where does air collect and how does it move?

Friends! Let's start with the banal things. How do bubbles in water behave? They rise up. So the air in the heating system rises. If a pipe with water has a slope, even a slight one, then the air will still flow up it, that is, in the upward direction of the slope. If the pipe has a very slight slope, then the air will still flow up it, but very slowly. How slow? Depends on many factors. If the pipe has a smooth inner surface, then the bubble will flow through it faster than through a pipe that does not have a smooth inner surface. It is easier for air to flow through a pipe with a large diameter than through a pipe with a small diameter. In general, a bubble can travel along a highway with a slight slope for a day, two, or a week. Depends on many reasons and even on atmospheric pressure.

About the surface inside the pipes

I know of only one type of modern pipe with a non-smooth inner surface. These are pipes made of ordinary metal, black or galvanized. All other modern pipes have a very smooth, almost mirror-like inner surface. I already wrote when I was looking at plumbing that there is no need to use old (out-of-date) pieces of iron in a new house. I have to repeat it. If you don’t want problems, never, under any circumstances, use iron pipes and fittings for heating or plumbing! Use either plastic, copper or brass. Copper is the best, but it is also the most expensive.

If there is a fluid flow (circulation) in the system, especially forced circulation, and this circulation goes in the direction opposite to the direction of movement of the air bubble, then this circulation will interfere with the natural movement of the bubble. According to experience, the air bubble does not move against the movement of water.

About air traps in the heating system

The system may have a hump in the supply line. The bubble will easily enter this hump, but it will be extremely difficult for it to come out. Sometimes it’s completely impossible. Here we have the most difficult case. Depending on the steepness of the hump, we may never remove this air from the system at all. Only if you cut the pipe at the very top and cut in a valve to bleed air.

There are complex devices in the heating system from which air cannot escape in principle. This is, for example, a radiator. If the radiator has an inlet and outlet on one side (for example, on the left), and the second side (right) has plugs at the top and bottom, then this radiator will collect air on the right and it will never leave there. And we won’t be able to get this bubble out of there with any manipulation. Another popular case is when water enters the radiator from the bottom and exits from the bottom. Then a bubble may form at the top of the radiator and you cannot expel it through the bottom of the radiator either.

Radiator - air trap

About traffic jams and small bubbles

It is clear that air can occupy the entire pipe along some of its length. This is an air lock. It is irresistible for natural circulation and for small (ordinary) circulation pumps. But there may also be small bubbles that travel through the system along with water. Such bubbles can simply circulate, or they can unite when they meet. If there is a place in the system to collect these bubbles, then during operation of the heating system an air lock will collect in this place. After this, circulation will stop. Bubbles can also collect in traps (radiators). In this case, the part of the radiator in which the air has collected becomes cold.

If the circulation in our system is quite fast, and there are no obvious humps or traps, then the bubbles circulate through the system and create gurgling sounds. It’s as if water is flowing in a thin stream from one container to another. I regularly hear this kind of noise in one of my bathrooms, which has a beautiful, but not very well-configured heated towel rail. The bubbles run through it so actively that some parts of the heated towel rail are either cold or hot.

About the highest points in heating

How many high points should there be in heating? In single-pipe heating there is strictly one. The heating uses a two-pipe scheme, but with natural circulation - also one. In heating with a circulation pump, there is also one, but with reservations. At the highest point of heating there must be means for releasing air, because the highest point is an air trap. An open expansion tank can serve as such a means. In closed circuit heating, special valves are needed. Automatic or manual.

Reservations for high points in a heating system with a circulation pump

Purely theoretically, we can lay both the supply and return lines along the baseboard and make water rises into each radiator. But you need to understand that any upward movement of water is overcoming the force of gravity and it is more difficult for water to move up than down. This means that the circulation pump must overcome additional resistance. Natural circulation, even poor circulation, is even more difficult in such systems. And even taking into account the fact that the water in the system does not just rise, but circulates, still, believe me, the upward movement of water is not preferable if there is a possibility of movement to the side or down. From the alternative “up” and “any other direction”, water always tends to choose “any other”.

We must strive in every possible way to ensure that the water does not have to go up often. It is better to raise hot water once through the main riser, and then release this water down the hill. I repeat. This is not a mandatory condition, but desirable. Don't go against gravity. The fight against gravity ends badly. If not a disaster (cold radiators), then overspending on heating.

Regarding the return line

The return line should have no humps or high points. Never and under no circumstances. The return line should never go higher than the radiator from which it takes water. Otherwise, when draining the water, we will not be able to drain the water from the radiator. The return line must be routed so that all water flows out of the system by itself and by gravity. There cannot be any air in the return line and no air valves are installed on the return line.

Why is there no air in the return line? Because all the air remains in the supply. It is quite difficult to force air down.

Where does air constantly come from in the heating system?

This question is asked quite often and I don’t know the exact answer to it. Just guesses.

Air can be taken from the water itself, in which it is somehow present. If there is a lot of water, then there will be a lot of air. After freshly filling the heating with water, air is actively released for several months.

Air can collect in dead ends, such as closed expansion tanks, and escape gradually. Through the same water. This process is even longer. Hang closed expansion tanks upside down, as I described in the article about open and closed heating systems.

If you have a special air trap in the form of a vertical pipe with an automatic air vent at the end, then this can also be a source of bubbles. The fact is that automatic air vents often “freeze” and stop venting air. Then the tube is filled with air and the bubbles accumulated in the tube are torn off from below by the air flow and carried into the system. In this case, I say that bubbles begin to circulate throughout the system.

If you have an exceptionally strong circulator installed and there is a small hole in the system, then I think air may be sucked into the hole due to the Venturi effect. I have observed this many times in a water supply system, when there is a hole from which water does not flow, but into which air is sucked in by the flow of water. That is, if you turn off the water, water flows out of the hole. And if you open the water at the end, the water stops flowing from the hole. But in reality, I have never seen this in heating systems. In heating systems, the water speed is not so high. But this does not mean that this can never happen.

Personally, in my heating system, the air stops bothering me about six months after freshly filling the heating with water. I don't have automatic air vents. All valves are manual only. But my system is small and my house is small.

How to remove air from the system?

The easiest way, and if the system is made correctly, is to go to the valve, open it, release the air until water flows, and close it. I’ve been doing this in my system for over ten years now and I’m happy with everything.

You need to operate this valve as follows. We hold the white part with one hand, because it will dangle and water will splash our walls. With our second hand we unscrew the screw in the middle. How do we hold a mug into which the water will be drained? Right! Third hand!

Please note that there is no guarantee that after screwing, the hole will point straight down. But still better than normal. I wonder if the standard crane was invented by the genius Mayevsky, then who invented this crane? But, by the way, Mayevsky is an unknown hero. Someone came up with it and off it went.

If the system is gravity-flowing and there are no valves for bleeding air, but there are slopes, then you need to wait until the air comes out on its own through the expansion tank. In this case, there should be no circulation in the system. The system must be cold. You can wait a long time. It could be a day, three days, or a week. It all depends on the length of the lines, the diameter of the pipes and the steepness of the slopes. This expectation is also typical when filling the system from above. In other words, if your system is working, but poorly, and you would like the bubbles to come out on their own, then you need to turn off the boiler, turn off the motor, if there is one, and let the system cool. The heating system has circulation and this circulation will interfere with the exit of air in those areas where the circulation and exit of bubbles go in different directions.

Automatic air vents should be installed at the highest heating points. They should not be included in the security group. Now strange security groups like tridents have appeared. There is a pressure gauge on one tooth, an emergency valve on the other, and an air vent on the third. I consider this trident a stupid and arrogant move to extract extra money from us. The air vent on this trident is superfluous. It was turned on in order to extract extra money from us. There is no air at the outlet of the boiler. Air accumulates at the highest points. But the boiler is not this top point. The boiler is, one might say, a continuation of the return flow. But there is no air in the return.

Is it possible to expel the air with strong water pressure?

Theoretically it is possible, in practice it is very difficult. To do this, you need a powerful pump with high pressure (more than two atmospheres). In this way, air can only be expelled from an open system. Also, there should not be too many branches in the system, or those branches that are not driven through must be closed. Usually with this method the expansion tank overflows heavily. You need a lot of experience and skill to use this method.

Expelling air by draining water

But this is the most popular way to “bleed” gravity systems. A large volume of water is drained from below while simultaneously being poured from above. The bubble is thus shifted, broken and removed from the place where it was stuck. This method is personified by the torment of the Russian people (I don’t know about other peoples) with gravity-fed open heating.

I consider the topic of air in the heating system to be covered. If you forgot anything, write in the comments. I'll finish it. When commenting, no registration is required and there is no captcha. Over the past few years, I have personally responded to all comments, with very few exceptions. At least “thank you,” but I’ll answer.

I hope for a successful solution to the problems of air locks in your heating.
Dmitry Belkin.

Any heating system can experience air buildup, which can negatively impact operating efficiency. Why does the heating system air in a private home, what causes this phenomenon, and what ways to combat it exist - such questions concern many homeowners. Therefore, this problem should be studied in more detail.

First, you need to understand why heating is aired and what consequences are expected if there is air in the heating system:

• Voids form in the coolant, therefore, heat transfer becomes worse.
• The coolant circulation in the system becomes slow or stops completely.

All this leads to the fact that the efficiency of the system becomes very low, and heating costs increase.

Reasons for the appearance of air in the heating system

For many homeowners, the pressing question is why the heating system in a private home is airing. This can happen for a variety of reasons, but most often air accumulates in the following cases:

• The system was depressurized due to ongoing repair work. Scheduled preventive maintenance is carried out regularly during the summer, which involves replacing risers, heating devices and shut-off valves. As a result, the sealing of the system is broken and air enters it.
• Draining water from the heating system. During the process of repair, flushing or pressure testing, the water from the system is completely drained. When the circuit is subsequently filled with water, in most cases air is formed in the heating system in a private home.
• The integrity of the heating system is compromised. If the system has weak points or pockets with signs of destruction, then an air lock will certainly form here.

Ways to deal with air jams

In parallel with the question of why the heating system becomes airy, the problem of what options exist to solve it becomes urgent. At the same time, methods for removing air from the heating system are of interest not only to owners of private houses. Residents of apartments located on the upper floors of an apartment building also suffer from this problem, because the air is lighter than water, so it rises.

Design engineers found a solution to the problem of airing the heating system and presented a fresh replacement for the old Mayevsky tap. Now a valve is installed on each riser on the top floor of the house, which is responsible for venting air from the heating system. In private homes, the problem of airing is solved by installing an air separator for the heating system.

Mayevsky cranes

With the help of a Mayevsky crane, air is discharged in apartments of old-type multi-storey buildings. They installed a heating system with bottom wiring, its connection to the heating network was carried out through an elevator.

During the operation of such a system, its shortcomings began to be discovered, in particular, air jams began to form in the systems of apartments on the upper floors. As a result, the circulation of the coolant practically stopped and the efficiency of the heating system in the entire house decreased significantly, and the residents began to worry about the question of why the heating system was leaking.

Engineer Mayevsky, who developed a special mechanism for de-airing the heating system, helped solve the problem of what to do if the heating system is air-filled. It was called the Mayevsky crane.

For effective operation, the device must be installed at the highest point of the heating device at one of the ends. Any radiator at the end has blind ends on which plugs are placed, one of which is replaced by a Mayevsky tap.

The result of using such a device was positive and quick; apartment residents were able to bleed air from the heating system on their own. The main thing when performing such actions is to be careful. Strongly tightening the threads on the Mayevsky tap can lead to deformation and failure of the entire structure.

The disadvantage of heating systems that require the use of Mayevsky taps is the need to bleed air in each apartment. The problem can be solved by installing pipes with shut-off valves at the highest points of the system. This allows technical workers to independently carry out air release without involving apartment residents.

Air separators

Another device that helps solve the problem of air in the heating system is an air separator.

If the Mayevsky tap is designed to remove air bubbles at the upper points of the heating circuit, then the air separator collects water with dissolved air, turns it into bubbles and removes it. This is the main difference between the devices.

In most cases, the air separator is produced in the same housing as the sludge separator. The latter device is designed to remove grains of sand and rust particles. Two devices combined into one housing take up significantly less space. This is a great advantage, since both an air trap and a sludge trap are a necessity for large systems.

Automatic air venting device

With this useful mechanism, air is automatically removed from the system without requiring owner intervention.

The device operates according to the following principle:

• The coolant is supplied to the housing with a built-in plastic float.
• Using a flag on the float, pressure is applied to the rod with a spring.
• This opens up air to the atmosphere, so it escapes.
• After filling the body with water, the float begins to press on the rod, and the air outlet hole is blocked.

It should be noted that most of the air vents produced work according to the described principle.

Such devices are reliable and durable, but there are situations when the mechanisms fail. The main reason for this is the following:

• Fouling of internal elements with hardness salts. When low-quality coolant passes through the mechanism, growths form on the needle, which reduce its efficiency. You can solve this type of problem yourself; just unscrew the lid and clean the internal parts of the device.
• Destruction of the sealing ring. The result of this situation is the formation of leaks under the cover. To solve the problem, you need to replace the O-ring or wrap tow on the threads.

Thus, the formation of air in the heating system is inevitable, but this problem cannot be ignored. It is necessary to regularly remove air from the heating circuit, taking a very responsible approach to the process.

Problems of this type can be solved in several ways, which were described above. You need to choose a solution to this issue depending on the reasons for airing in the heating system, so it is recommended to seek advice from professional craftsmen.

Heating a home requires high-quality design of the heating system, selection of the necessary equipment and its installation. But also do not forget about proper care of the system. Unfortunately, even with good care of the heating system, various problems occur that need to be eliminated. A common problem is the appearance of air in the system. In this article we will look at the causes of airing and ways to eliminate it.

How does air affect the heating system?

The heating system works according to the following principle: hot water circulates through the heating system and transfers part of the coolant to the radiators. Thus, when air enters the system, the coolant circulation is disrupted. When the system is aired, the following problems appear:

• Most often, in rooms where there is no control over the temperature, air jams occur. As a result, the system defrosts.
• The circulation of the coolant is accompanied by characteristic noise. It brings not only discomfort, but also gradually destroys the welded joints.
• When air enters internal metal parts, corrosion can form. Consequently, the service life of heating equipment is reduced.
• The coolant circulation slows down or stops altogether. In this case, the efficiency of the heating system decreases and fuel consumption increases.

To prevent such unpleasant consequences, it is worth understanding why air appears in the heating system.

Why does air appear in the heating system?

Many people wonder why airing occurs if the heating system is sealed. Let's look at the possible reasons:

• When installing pipelines, the angle of inclination was violated;
• Since water, in addition to calcium and magnesium, also contains oxygen, the volume of oxygen increases with increasing pressure in the system;
• If the elements of the heating system are poorly connected to each other, air can enter;
• There are no air vents or they do not work;
• Corrosion. It leads to the destruction of elements of the heating system, and, consequently, to a violation of the seal;
• The pipeline is not filling correctly. Water must be supplied slowly, and air must be pumped out from the radiators at the same time. If water is supplied quickly, bubbles will form, and these, in turn, cause airing in the system. It is worth considering that the more branches in the heating system, the slower the water should be supplied;
• Often during repair work the system becomes depressurized;
• A process in which molecules of one substance penetrate between the molecules of another. This process is called diffusion. To prevent this process from occurring, it is necessary to apply a special coating that is applied to the pipes.

These reasons are the most popular, but there are others.

How to prevent airing

Air vents can be installed to prevent air pollution. They must be installed in pipe bends or at high points where pipelines are located.

You can also fill the equipment with water. During the process of filling with water, it is necessary to open all taps except those that drain water. Water is supplied from bottom to top. When carrying out such actions, water squeezes air out of the system. But do not forget that water should be supplied slowly. Once water starts flowing from the tap, it must be turned off. Thus, the water will continue to rise higher until the entire system is full.

Devices for eliminating air pollution

In order to remove air from the heating system, the following devices are used:

1. Mayevsky crane. It is located at the top of the radiator. In order to bleed air, use a wrench or screwdriver to turn the valve smoothly counterclockwise. You need to turn it until a hissing noise appears.

2. Automatic air vents are installed at the highest point of the heating system, as well as on the heating boiler. They are horizontal and vertical. You do not need to be present to bleed air from the heating system. Since air vents are susceptible to contamination, it is necessary to install cleaning filters on the supply and return.

3. Air separator. Its operating principle is to remove air that has dissolved in the heat carrier. Many separators are also designed to remove and collect sludge.

In large heating systems, only air separators are used, since it is quite difficult to remove air with ordinary hand-held devices.

First you need to determine where the air lock is located. This can be done in the following way: lowering the temperature in the devices, tapping the system elements or listening to the characteristic sound in the pipes.

Once the location of the air lock has been determined, it is necessary to find an air vent that is closest to the highest point along the direction of movement of the coolant. In order to get rid of air, it is necessary to turn on the system make-up.

But there are times when it is impossible to determine the location of the airlock. In this case, you need to seek help from specialists:

1. As the pressure in the system increases and the temperature increases, the plug will either be removed using automatic devices or moved to a place where it can be found.
2. If you hit the pipes hard, it is possible that the resulting air will move. But this method does not always give results.

If airing often occurs during the period of use of the heating system, then it is necessary to find and eliminate the cause of its occurrence.

Air in the heating system is a very bad thing for any heating system. How to deal with this phenomenon and why it occurs, we will consider in detail in this article.

First, let's say why airing the system is so bad:

• Deterioration of heat transfer due to voids in the coolant;
• Deterioration or complete absence of circulation in the heating system.

The cost of operating the system with air is very high and entails large losses.

What causes air to enter the heating system?

The reasons for airing in the heating system can be very diverse, but the most common reasons are:

• Repair work on risers in which the system became depressurized;
• Complete drainage of water from the heating system;
• Violation of system integrity.

During summer scheduled maintenance, various works are performed:

• Replacement of heating devices;
• Replacement of risers and locking mechanisms.

These works lead to depressurization of heating systems, as a result of which air gets into it. The air in the system is dangerous not only for the reasons written just above, in addition to everything, the oxygen contained in the air mixture contributes to accelerated wear of the system itself as a result of corrosion.

Air may also appear in the heating system due to water draining from the first.

Drainage is performed for different purposes:

• Repair;
• Washing;
• Pressure tests, etc.

An air lock in the heating system can also occur due to deformation and disruption of the integrity of the system. In this case, airing may occur through the deformed section of the pipeline.

But this is only in the case of individual heating without automatic replenishment of the system. If in this case the heating is centralized, then there will be fistula and flooding.

Fighting air pollution

How to remove air from a heating system is a very popular question among owners of private houses and residents of upper floors.

Residents of multi-storey buildings who live on the last upper floors suffer greatly due to the air in the system. This is explained by the fact that in the heating system, air accumulates at the top because it is lighter than water.

But how can residents deal with this problem? The designers thought through a solution to this issue and designed a valve on the top floors of each riser to vent air from the heating system.

The latter is a fresh replacement for the old Mayevsky crane, which you can see in the photo below and in the video on the Internet.

The fight against air pollution in private homes comes down to installing one mechanism - this mechanism is an air separator for heating.

Such a solution aimed at venting air can be found in all old-style residential apartment buildings.

In such houses, a heating system with bottom wiring was installed, which was connected to the heating network using an elevator.

During the operation of such a system, one significant drawback was revealed - airing of the upper consumers. This problem led to disruption of the circulation of the entire heating system of the building and, as a result, the residents received poor-quality heating.

To solve this problem, mechanisms have been developed to de-air the system. A crane was used, which received the name of the person who found the solution to this problem - Mr. Mayevsky.

Such a tap can be installed on any heating radiator. At the end of the battery, the collectors have blind ends. The ends are capped with futorkas.

Instead of one upper fitting, it was decided to install a Mayevsky crane. It turns out that the tap was installed at the highest point of the entire heating system.

The use of such a crane gave quick and positive results. People could bleed the air themselves and thereby bleed the air with their own hands. Installation instructions are freely available on the World Wide Web, and you can read this information yourself.

Advice. Do not over-tighten the thread on the Mayevsky tap, as you may break it.

The disadvantage of this air removal process is the need for personal air removal for each resident. To avoid this, in practice, pipes with shut-off valves are used, which are installed at the highest points of the system (on technical floors).

This solution allows maintenance personnel to bleed the air themselves and not burden the residents with this responsibility.

Air separators are another answer to the question “how to remove air from the heating system”?

The difference between the Mayevsky faucet and such a separator is that the first removes air accumulations from the highest points, and the second removes air that has dissolved in the water.

The separator takes air, converts it into bubbles, and then removes it. These are the main differences.

Very often, such air separators are produced together with sludge separators, in the same housing. The sludge separator collects various impurities: sand, rust and others. Such a symbiosis of an air and sludge trap can save space during installation.

It is worth noting that the need for air separators increases with the size of the heating system. If in small heating systems the air is bled from the heating system

can be done manually by removing air and other impurities, but in a large system this becomes problematic.

Automatic air vent

This is a very useful mechanism that allows its owner not to think about how to remove air from the heating system. He will do everything himself.

Let's see how it works thanks to the photo with its structure just below.

Principle of operation:

1. The coolant enters the housing where the plastic float is located;
2. Thanks to the flag, the float presses on the rod, which is spring-loaded;
3. Air access to the atmosphere is open and it can escape;
4. The body is filled with water, and the float presses on the rod and blocks the air outlet hole.

Note that this is the type of operation of all air vents.

A heating system operating on a liquid coolant easily becomes airborne in the absence of preventive measures. Pressure drops, repairs, oxygen concentration in hot water become sources from which air constantly appears in the pipes. Its presence impairs the performance of the entire system and disables it.

Accumulated air reduces the heat transfer of the heating system due to the deterioration of coolant circulation or its complete stop. Loss of system effectiveness leads to unprofitability of its operation. Here are some of the main problems that airing causes:

• Formation of voids;
• Reduced heat transfer;
• Slowing down and completely stopping water circulation;
• Increased material costs for the heating process;
• Corrosion of metal parts inside the heating system;
• Fistula formation;
• The appearance of flooding due to depressurization.

The consequence of constantly accumulating air is such unpleasant phenomena as cold rooms and an unjustified increase in flow rates, since the resources spent on heating the coolant are used inefficiently.

When the water in the circuit is aired, its circulation produces constant noise in the apartment. Air movement generates vibration, which over time leads to malfunction of butt joints and loosening of threaded contacts.

The presence of oxygen in the heating circuit causes serious corrosive damage. As a result, microcracks appear in some places and water leaks.

Sources of air entering the system

H2_2

The main reasons for airing:

1. Replacement of various heating elements;
2. Repair work on risers and heating devices;
3. Coolant drainage;
4. Design and operational errors of the heating system;
5. Low pressure;
6. Clogged pipes;
7. Depressurization of the system due to deformation;
8. Absence or malfunction of air vents.

Particular attention should be paid to the process of filling the heating circuit with coolant. If the approach is taken incorrectly, if the system is filled too quickly, the liquid will become airy. Oxygen dissolves in water, filling it with bubbles. After a certain period of time, air collects in certain places, creating voids that block the normal functioning of heating devices.

Water as an independent culprit of gas formation

Not only artificial reasons affect the appearance of oxygen. The system will also become airy due to the physical property of hot water to release air. A gas mixture dissolved in the liquid enters the heating circuit.

The amount of the latter is determined by the type of coolant used, which is taken during filling and addition. Cold liquid contains air from 30 g per ton. Tap water with a volume of 7 m3 will release about 0.20 m3 of gas when the temperature increases from 10 to 95 °C. This amount is enough to clog a pipeline with a diameter of 0.5 cm over a distance of more than 100 m. Such an air cushion will lead to a complete blockage of the heating system, which is why it requires advance warning.

Fact! Deaerated water is preferable for filling. However, over time it produces a chemical reaction with the rusting iron, releasing hydrogen. Its volume also becomes significant. A liter of hydrogen gas is formed when only 1 cm 3 of metal corrodes.

Ways to prevent air from entering the system

Several devices are used to prevent airing of the system:

• Mayevsky crane;
• Air separator;
• Automatic air vent.

The Majewski Crane takes advantage of the physical property of air to rise on top of water due to its lighter weight. Air is removed by bleeding through an open tap. Installed in heating in two ways. Either it is taken when constructing batteries for residents to lower themselves, or it is mounted only in the attic, where the highest point of the building is located. All the air accumulates there, from where it is removed through the tap. This design is convenient for personnel servicing the heating system in apartment buildings, since it allows them not to disturb the residents.

The air separator, passing water through itself, separates the dissolved air and independently removes it. Can be installed on any floor.

The automatic air vent in heating works independently. It contains a float with a gasket. There is a hole at the top where air comes out. After all the gas is removed from the mechanism under water pressure, the float rises and the gasket closes the hole, blocking the exit of the liquid.

Advice! Air also appears by release from the coolant at low hydraulic pressure, especially in the upper floors of the heating system. An excessive increase in pressure in certain parts of the circuit, especially those at risk of airing, helps eliminate gas formation.