All the secrets of repair and maintenance of ventilation systems of houses and apartments. Who should clean the ventilation in an apartment building Who should check the ventilation

Non-working ventilation in a residential or office complex threatens residents with a “syndrome big building»: the state of health spontaneously worsens, ailments appear.

But when equipment fails in an industrial plant, even worse consequences are possible. Many technological processes associated with the release of vapors of toxic substances and dust, which must be neutralized. Therefore, maintenance and repair of ventilation should be carried out regularly.

Repair of ventilation is included in OKPD. In the All-Russian Classifier of Products by Type of Economic Activity, OKPD ventilation repair is carried out under the codes 45.33.12.190, 191 and 199. OKPD ventilation repair refers to the section "Construction work".

The need for maintenance of ventilation

The ventilation system is one of the most important life support systems for people. Every building should have a functioning ventilation system, selected for its purpose and use.

The easiest to maintain and repair natural ventilation of residential apartment buildings. At industrial enterprises, mechanical supply and exhaust systems are installed.

Causes of failure of ventilation systems:

violations during the installation of equipment;
illiterate use;
technological aging of mechanisms;
refusal of maintenance;
mechanical damage.

The nature of the malfunction is also affected by the operating conditions of the equipment. For example, supply and exhaust ventilation systems located near busy highways are quickly clogged and destroyed by dust, debris, burning.

Not only forced ventilation systems fail. The natural ventilation of apartment buildings also needs to be repaired or cleaned. Over time, debris and dust accumulate in the mines, the brickwork of pipes crumbles, and a major overhaul of the ventilation system is required. Often, residents partially dismantle the ventilation ducts, disrupting the movement of air. In this case, without ventilation repair apartment building not enough. It is enough to restore the walls of the mine and the system will return to normal.

Repair of the ventilation of an apartment building is usually timed to coincide with the overhaul of the building itself and is carried out by housing and communal services workers.

In case of any violations in the operation of ventilation, it is most reasonable to call professionals. With the help of special devices, they quickly detect a breakdown and fix it.

Signs of impaired ventilation:

misted glass windows;
mold in the corners;
the flow of odors from one room to another.

The need to repair the ventilation system can also be indicated by the ailments of people:

difficulty breathing, asthmatic phenomena;
frequent colds and infectious diseases;
pain in the back and joints.

Stages of repair of ventilation systems

Repair and maintenance of ventilation include the following works:

Diagnosis and elimination of malfunctions during the warranty and post-warranty period;
Preventive work required during the operation of ventilation systems (cleaning, troubleshooting, testing automatic systems management).

Operational maintenance consists in debugging and prevention of mechanisms that ensure the uninterrupted operation of ventilation equipment.

Repair and maintenance of ventilation are carried out in stages. First, the masters examine the state of the system, after which they clean and disinfect. And the final stage is the determination of the quality of ventilation repair and the issuance of a document on the state of the system in the apartment.

As a rule, repair of ventilation systems is carried out without dismantling, directly at the place of its installation. In case of particularly complex breakdowns, the mechanisms are removed and taken to the workshops.

The list of services for the repair and maintenance of ventilation:

checking the connections of ventilation ducts, fasteners and the integrity of the housings;
lubrication of mechanical parts and cleaning of filters;
testing of automatic control systems;
inspection of electrical wiring, packages;
checking the operation of dampers and control valves;
fan cleaning, testing and balancing;
repair of ventilation heaters and heat exchangers;
testing the state of the heat exchanger;
replacement of all faulty components.

V supply and exhaust systems ventilation heaters are used to heat the air to the required temperature. The heater can be water, fire or steam. Some use glycol solutions. Flushing the ventilation heater is one of the methods for its repair. The device is disassembled and cleaned of germs and scale with the help of chemicals.

Sometimes it is necessary to replace the ventilation heater plates. Repairs of this kind can be carried out immediately, as the leak is visible to the naked eye.

The frequency of repair and maintenance of ventilation systems depends on:

type of ventilation (natural, mechanical, combined);
type of system (supply, exhaust, supply and exhaust, ductless or duct);
the specifics of the building (office complex, residential building, industrial enterprise).

Diagnostics of the ventilation system

Before starting a major overhaul of the ventilation system, its diagnostics are carried out:

the type of system is determined;
the state of ventilation shafts, the degree of their destruction and pollution are assessed;
the difference in pressure and temperature in the premises and on the street is measured;
the speed of air movement at various points of the ventilation system is determined;
the condition of the air intake grilles is assessed;
the operation of automatic control systems is checked;
the condition of the fans is examined, including the presence of lubrication;
the operation of the emergency shutdown system is evaluated.

For diagnostics, special equipment is required. Diagnostics is mandatory before commissioning, during after-sales service and before overhaul ventilation systems. Based on the data obtained, conclusions are made about the need for repair, replacement of faulty or obsolete components. Diagnostics is also carried out after cleaning the air ducts to assess the quality of work.

Repair of ventilation in apartment buildings can only be carried out by a service company that has special certificates.

Maintenance of automatic ventilation control systems

V modern construction more and more often, air handling units with automatic control are used. The user sets the necessary parameters that are supported by the automatically selected program or sets a single mode of operation.

Adjustment of automatic control systems is carried out only by qualified specialists. Adjustment of automation is included in the list of services for maintenance and repair of ventilation. As a result, the equipment maintains the temperature, humidity and air velocity required by the customer in the premises. At the same time, specialists advise the client on the correct operation of ventilation.

The cost of repair and maintenance of ventilation

The cost of repairing the ventilation of an apartment building or enterprise is determined by the estimate. The list of services offered by ventilation repair companies in apartments and offices varies. Therefore, the cost of a service package that includes almost the same services may be different. The price of ventilation repair is determined by the type, capacity and branching of the network, the number and type of equipment. When planning the repair of ventilation in an apartment, first study the offers of several companies, paying attention Special attention level of qualification of specialists, equipment and tools. For the latest, watch the video.

The ventilation of an apartment building is a complex system of ventilation ducts that permeate the entire building, entering each apartment. It is through them that the air is removed from the premises. But over time, ventilation ducts and shafts decrease in cross section due to debris, fat and oil deposits, which leads to a weakening of the outflow of air masses. This means that the ventilation of the house begins to work incorrectly. That is, it's time to think about the question of how to clean the ventilation in the house.

Why clean ventilation

It is necessary to maintain the correct operation of the ventilation system for purely hygienic reasons. After all, the weakening of the hood leads, first of all, to a decrease in air exchange, which is legalized by sanitary standards of residence. The exhaust air leaving the ventilation shaft takes with it particles of dust, excessive humidity, as well as various kinds of microorganisms that adversely affect human health.

Therefore, there is a special attitude to cleaning the ventilation in the apartment. But, as practice shows, the owners of apartments practically do not deal with it. It is rare that anyone tries to do something to increase air outflow. But that doesn't help much either. Therefore, it is necessary to understand the process of cleaning the ventilation, and if it is possible to carry it out regularly. If not on your own, then at least once every two or three years, call a specialist.

When to Clean

It is clear that few people open the ventilation grill to look into the ventilation duct of the building. Therefore, it is worth paying attention to some signs that the ventilation duct has become smaller than its original size. Here are a few of the signs that are very striking.

Dust and dirt accumulate around the ventilation grill and on it, a cobweb appears.
After wet cleaning, dust immediately settles on the surface of the floor and furniture.
In the summer, in the very heat, the apartment does not get cool.
If there are drafts with open windows or front door became much weaker or disappeared altogether.

He will definitely say that cleaning the ventilation in the apartment is necessary. Especially if it has been used for many years. A paper napkin brought to the ventilation opening will help determine the need. If the napkin remains at the ventilation duct, then the ventilation is working well. If the napkin does not hold, then you need to sound the alarm. The channel is littered, and the ventilation does not work.

In the same way, you can check if you attach a piece of toilet paper or newsprint to the opening. If it sticks to the grate, then the ventilation works according to its parameters. If it falls, then the problem is serious, and it needs to be addressed urgently.

In general, it is impossible to bring the ventilation system of an apartment building to such a state. After all, this network has several levels equal to the number of floors. And channels lead to each apartment from the vertical shaft. Therefore, such a situation also happens when the horizontal channel from the apartment seems to be clean, but the air outflow is weak. The reason is that the vertical common channel is clogged. And here everyone will not be able to help themselves, because cleaning of the common ventilation shaft is required, for which the management company is responsible. And for her set precise norms how often to clean the ventilation of an apartment building, which, unfortunately, she does not perform.

Causes of clogged ventilation ducts

The main cause of clogging is a large accumulation of dust, dirt and grease on the walls of channels and shafts. Unfortunately, this is how the ventilation of an apartment building is arranged, which is difficult to get into. These are narrow channels through which the exhaust air from the apartments, especially from the kitchen and bathroom, goes outside. Moving through the system, the particles located in it settle on the walls of the channels, increasing in thickness over the years in the form of a mud layer. Hence the reduction in the cross section of the ducts.

Another reason is the collapse brickwork, from which a ventilation shaft is built in many houses. Repairing masonry is very difficult, and sometimes possible, so you have to live with such incorrectly working ventilation.

The third reason is small animals and birds that got inside the ventilation and died. Some birds build nests in canals that cover part of the opening.

The fourth reason is the installed kitchen hood, the air duct of which is cut into the ventilation duct. The reason is quite serious, because the ventilation of an apartment building itself must provide air exchange inside the apartment at the rate of 90 m³ / h. And this is 5-10 times less than the performance of modern hoods. That is, when a household appliance is turned on, excess pressure is formed in the ventilation shaft, which pushes the air in it through the channels to neighboring apartments. That is, we can no longer talk about the ventilation of an apartment building.

How to clean the ventilation in the apartment with your own hands

We turn to the main question of the article, which has always been relevant, and today many owners of city apartments ask it: how to clean the ventilation in an apartment with your own hands. As mentioned above, if the management companies fulfilled their duties exactly, then there would be no need to clean the ventilation on their own. But things are such that no one wants to deal with your apartments except yourself. Therefore, all activities will have to be carried out without a specialist.

Although it should be noted that cleaning the horizontal channel is an ineffective operation, because without cleaning the vertical riser, these are just cosmetic measures. But even they can increase air draft a little. So what needs to be done:

the ventilation grille is removed, which must be washed with household detergent because fat and oil deposits with clean or soapy water are unlikely to go away;
the web is removed with a broom or a rag, try to do this by completely putting them into the channel;
arm yourself with a spatula and scrape dirt deposits from the walls of the channel, in no case do not use chemicals, they will not help here;
take a long wire and shove it as far as possible, that is, in this way the arm lengthens, additionally tie a brush to it;
after that, you need to put the hose from the vacuum cleaner into the channel and turn on the latter to remove the accumulated and collected debris.

There are no other options to clean the ventilation duct from your apartment. Of course, if you do not invite specialists armed with special equipment. When carrying out these works, be sure to be careful. Caution in this matter is in the first place, because inside the ventilation passages there may be wasp nests, dwellings of lizards and other small rodents.

Where to go if you can't clean it yourself

We must immediately make a reservation that cleaning the ventilation in an apartment building is the responsibility of a special organization that has entered into an agreement with the management company. It is forbidden to clean the vertical ventilation shaft on your own. Yes, and it is qualitatively impossible to do this with improvised tools and devices.

Therefore, you need to come to the office of the management company and leave a written application, indicating in it the number of the entrance and the number of the house. The thing is that one vertical ventilation shaft is often installed on one entrance. Therefore, it will be easy to search for it if the entrance number is indicated.

The specialists who arrived on a call must first take measurements of the air velocity in the ventilation system. One froze from the side of the apartment, the other from inside the venshakhta. After that, it is determined what activities will be carried out. By the way, in addition to cleaning, it is proposed to carry out disinfection or repair.

Note that the question of who should clean up specifies the responsibility of the parties. That is, the management company itself does not do this. She simply monitors the requirements of the tenants of an apartment building and their implementation by her employees or persons with whom there is an agreement to hold certain events. But tenants must demand the performance of work from the management company.

To begin with, we will give the main advice - you cannot clean the ventilation in the apartment on your own. But if there is no other way out, then do not climb into the vertical riser. Your options are limited, so you can only clean the horizontal ventilation duct that connects the shaft to the apartment. How to do it, you now know.

Sometimes the apartment owners themselves are to blame for the fact that the internal air exchange is reduced or completely absent. In the process of ongoing repairs, they close finishing materials ventilation openings. First, you can't do this. Secondly, if this still happened, then try to correct the situation and bring it back to normal. Otherwise high humidity, unpleasant odors, mold and fungi you can not avoid.

If, nevertheless, a decision is made to clean the air ducts with your own hands, then try to prepare thoroughly for this event. To do this, you will need the tools and fixtures described above, as well as a reliable stepladder.

The ventilation system of the house is a common property and it should be maintained by the management company, to which you pay a lot of money every month under the article “maintenance and repair of the home”.
It is installed next. documents:

A. “Rules of Content common property in an apartment building ”(approved by the Decree of the Government of the Russian Federation of August 13, 2006 N 491):
… 2. Common property includes:
e) mechanical, electrical, SANITARY AND OTHER EQUIPMENT located in an apartment building outside or inside the premises and serving more than one residential and (or) non-residential premises (apartments);

B. "The minimum list of services and works necessary to ensure the proper maintenance of common property in an apartment building, and the procedure for their provision and implementation" (approved by Decree of the Government of the Russian Federation No. 290 of April 03, 2013)

“... 15. Works performed for the proper maintenance of VENTILATION AND SMOKE EXHAUST systems in apartment buildings:
- maintenance and seasonal management of equipment for ventilation and smoke removal systems, determination of the operability of equipment and system elements;
- condition monitoring, identification and elimination of the causes of unacceptable vibrations and noise during operation ventilation unit;
... elimination of leaks in ventilation ducts and shafts, elimination of blockages in channels, elimination of malfunctions of gates and throttle valves in exhaust shafts, umbrellas over shafts and deflectors, replacement of defective exhaust grilles and their fastenings;
… monitoring the condition and restoring the anti-corrosion coating of metal exhaust ducts, pipes, trays and deflectors;
- in case of detection of damages and violations - development of a plan for restoration work (if necessary), carrying out restoration work.

C. "Rules and norms for the technical operation of the housing stock" (approved by the Post. Gosstroy of the Russian Federation of September 27, 2003 No. 170):

“… V. Maintenance and repair of engineering equipment
… 5.7. Ventilation
5.7.1. Design temperatures, multiplicity and norms of air exchange for various premises residential buildings must comply with the established requirements. Natural exhaust ventilation must ensure the removal of the required volume of air from all the premises provided for by the project at current outdoor temperatures of 5 degrees. From and below….
5.7.2. Personnel servicing the ventilation systems of residential buildings are obliged to produce:
- scheduled inspections and elimination of all identified system malfunctions;
- replacement of broken exhaust grilles and their fastening;
- elimination of leaks in ventilation ducts and shafts;
- elimination of blockages in channels;
- Troubleshooting gate valves and throttle valves in exhaust shafts, umbrellas over shafts and deflectors.
… 5.7.7. ventilation systems in residential buildings should be adjusted depending on sharp drops or increases in the current outdoor temperature and strong winds.
Engineering and technical workers of housing stock maintenance organizations are required to instruct residents on the rules for regulating ventilation systems.
5.7.8. It is not allowed to seal exhaust ventilation grilles or cover them with household items, as well as use them as fastenings for clotheslines for drying clothes ....
5.7.9. The heads of the central exhaust shafts of natural ventilation must have umbrellas and deflectors.
… 5.7.11. The list of deficiencies in the ventilation system, TO BE ELIMINATED DURING REPAIR of a residential building, should be compiled on the basis of spring inspection data ....

Appendix N 4 (recommended)
LIST OF WORKS ON THE MAINTENANCE OF RESIDENTIAL BUILDINGS
Works performed during technical inspections and walk-arounds of individual elements and premises of residential buildings
…6. Checking the presence of draft in the smoke ventilation ducts.

Appendix N 7 (recommended)
LIST OF WORKS RELATED TO CURRENT REPAIRS
… 14. Ventilation
REPLACEMENT AND RESTORATION OF WORKABILITY of the internal ventilation system, including the fans themselves and their electric drives.

G. MDK 2-04.2004 "Methodological guide for the maintenance and repair of the housing stock" (approved by order of the USSR State Construction Committee in 2004):
“… 4.3.6. The housing maintenance organization must:
- maintain ventilation ducts and chimneys in a technically sound condition;

… 4.3.7. Works to eliminate defects of a construction nature, ELIMINATION OF DISTURBANCES OF CHANNEL DRIVE REVEALED DURING SCHEDULED INSPECTIONS, as well as Finishing work after installation or repair internal devices gas supply MUST BE PERFORMED BY A HOUSING SERVICE ORGANIZATION.

… 4.3.12. HOUSING MAINTENANCE ORGANIZATIONS ARE RESPONSIBLE for technically sound condition ventilation ducts. It is not allowed during any work to eliminate ventilation ducts in kitchens and other rooms equipped with gas heaters. In progress Maintenance of the housing stock, they must ensure periodic checks of the suitability of ventilation ducts and chimneys for operation within the following periods:
... b) ventilation ducts of premises in which gas appliances are installed - at least twice a year (in winter and summer).
Repair of chimneys and ventilation ducts is allowed to be carried out by the personnel of the housing stock maintenance organization, who has the appropriate specialty and training, under the supervision of an engineering and technical worker.

… 4.3.13. Unauthorized repairs, modifications and extensions of chimneys and ventilation ducts are not allowed. Checking and cleaning of chimneys and ventilation ducts must be drawn up by ACTS. After each repair, chimneys and ventilation ducts are subject to inspection and cleaning, regardless of the previous inspection and cleaning, within the time limits established in the acts.

Annex 2
LIST OF WORKS INCLUDED IN PAYMENT FOR HOUSING REPAIR (maintenance)
… 14. Ventilation:
change of individual sections and elimination of leaks in ventilation ducts, shafts and chambers; ... "

The management company is responsible for the condition of ventilation in an apartment building. In the article we will talk about how the MKD air exchange system is arranged and works, and we will also pay special attention to the responsibilities of the management company in terms of its inspection, cleaning and repair. You will learn exactly what and how often you need to do to ensure the normal operation of communications and the absence of claims from controllers.

Ventilation in MKD: device, operation and maintenance

According to sanitary requirements, air exchange must constantly occur in the premises of apartment buildings. From kitchens, bathrooms and toilets, “exhausted” air is removed, instead of which fresh streams are supplied. In the MKD of the old building, ventilation was carried out due to natural exhaust. In modern houses, forced ventilation systems are installed with equipment located in the roofs.

The normal functioning of ventilation in an apartment building is the concern of the organization serving it. Its specialists need to know how this system works, as well as how it is maintained.

Why is there ventilation in an apartment building?

The concept of "ventilation" is disclosed in SNiP 41-01-2003. It refers to the exchange of air flows, in which excess heat and humidity are removed from the premises, as well as unpleasant odors, dust and harmful substances. Well-functioning ventilation ducts in an apartment building contribute to air purification and the creation of a favorable microclimate in the premises.

The lack of a normally working air exchange in rooms in which people are constantly present not only causes inconvenience, but also carries potential harm to health. Stagnant air in housing provokes the development allergic reactions, as well as various diseases respiratory organs. If the room is not ventilated, then high humidity is maintained in it, which adversely affects furniture and decorative finishes.

The simplest criterion for assessing how ventilation works in an MKD is tracking the spread of odors from the kitchen. If, with the window open, they are carried throughout the apartment, then there are serious problems with air exchange. Often, residents of the upper floors experience inconvenience due to poorly functioning ventilation, because there is not enough draft in their apartments due to the proximity of the end of the channel.

Two ventilation options

The ventilation system in an apartment building can be arranged in different ways - a lot here depends on the layout of the apartments and the building materials used. Air removal can be carried out according to two schemes. Let's describe each of them.

Scheme 1. Summing up the ventilation shaft to the attic, where it goes into a horizontal box.

Here, sealed air ducts are combined into a common channel that rises above the roof. All air is fed into a horizontal box, through it it enters the common channel and is discharged outside. The moving air mass collides with the walls of the box, which creates an area high pressure and there is a tap to the street through the nearest hole.

Scheme 2. Output of all ventilation ducts to the attic.

Ventilation in an apartment building is arranged in such a way that the attic works as an intermediate chamber. The ventilation shaft is brought out through the roof.

Backdraft in the MKD ventilation system usually does not occur. This is due to the small length of the channels (40 centimeters).

A typical apartment building ventilation system works as follows:

air from the housing is removed through the ventilation grill and sent to the adjacent channel;
satellite channels are connected into a common box;
air masses through a single duct enter the prefabricated line;
protective boxes close all ventilation shafts in the attic of the MKD;
The exhaust air enters the atmosphere through a vertical exhaust duct.

Natural and artificial ventilation

Air exchange systems in apartment buildings are divided into:

natural, when air enters through holes in the walls and windows;
artificial (mechanical), when the movement of air masses is forced.

Natural ventilation is good because it is cheap and easy to maintain. Of the minuses, it should be noted the significant diameter of the ventilation shaft and the dependence on weather conditions.

When arranging mechanical ventilation in MKD, special equipment is used - fans, air conditioners, dust collectors and other devices. Forced ventilation of apartments is much more expensive than natural ventilation. The rise in price is due to higher maintenance costs and the need to pay for electricity. The main advantage of such systems is fast and high-quality ventilation, regardless of external conditions.

Modern artificial ventilation systems can not only remove exhaust air and supply fresh air. They are also capable, for example, of heating and purifying air masses. Additional functions are not available for natural ventilation.

Features of natural ventilation

Each entrance of the MKD has its own ventilation duct, which goes through all floors and goes to the attic or roof. Satellite channels are connected to it, through which air is supplied from the kitchen, bathroom and toilet. Exhaust air is discharged outside through a common ventilation duct. The scheme of work seems simple and understandable, but in reality there are many factors that can disrupt air exchange.

Ventilation shafts for natural air circulation in residential buildings must be mandatory. The requirements for ventilation in an apartment building are as follows:

hermetic design;
compliance of the throughput with the values specified by the project;
compliance with sanitary and hygienic standards;
fire safety system.

According to SNiP, apartments in MKD are ventilated, including through ajar windows or slotted holes in window structures. If the windows remain hermetically closed all the time, then there will be no normal air exchange in the room. The standards set the speed at which air exchange should occur. We present this information in the form of a table.

Those who maintain ventilation in an apartment building need to understand why natural air exchange can be disturbed. There are four main points here:

refurbishment of ventilation ducts. During repairs and redevelopment, residents may violate the integrity of ventilation ducts;
debris in the air path;
incorrect connection of fume hoods. Household hoods with high power, connected to satellite channels, can lead to traffic jams and disrupt the system;
seasonal factors. The difference in air temperature in the home and on the street affects how the ventilation system will work. In winter, the circulation is much better; in the summer heat, on the contrary, it is minimal.

The work of ventilation in the basement of the MKD

The basement houses an important part of the ventilation system. The shaft, which removes air and supplies it to the apartments, begins precisely on the basement floor. It is also necessary to remove stagnant air and moisture from the basement, and this is done using a common ventilation shaft. It is connected to each apartment through satellite channels.

Proper basement ventilation in an apartment building prevents mold and mildew. Additionally, special air vents are provided here in the walls, located above ground level. The number of these holes depends on the area of the basement.

Checking the ventilation of an apartment building

A well-functioning ventilation system provides not only the convenience of living, but also affects the safety of people. Dry and greasy dust filling the channels is highly flammable and produces suffocating smoke. In this regard, communications through which fresh air is supplied must be regularly checked and cleaned.

According to sanitary rules, checking ventilation in an apartment building with preventive work held every three months. At least 4 times a year, the management company must inspect communications and, if necessary, bring them into a standard state.

How and when ventilation ducts are checked in residential buildings is determined in Rules 410 (PP RF No. 410 of 05/14/2013). According to paragraph 12 of this regulatory document, it is necessary to analyze the condition of ventilation ducts and chimneys in the following situations:

when the house is put into operation for the normal operation of gas or heating equipment;
if the ventilation ducts were repaired or the apartments underwent redevelopment;
for prevention. As mentioned above, this is done every three months, a week before the start heating season and within a week after its completion;
upon detection of poor traction or its complete absence;
if the house has gas equipment, and it was installed, serviced, repaired or diagnosed, as well as if emergency dispatch service was carried out.

Repair and cleaning of ventilation

Cleaning of ventilation ducts in an apartment building is carried out by specialized organizations that are equipped with necessary equipment. If the necessary equipment is available, the management company can also do this. According to sanitary standards, cleaning must be performed at least twice a year - during the winter and summer seasons.

Preliminary diagnostics are carried out, for which special devices are used, for example, endoscopes with video cameras. The state of the system is documented. After that, a plan of necessary measures for cleaning and repair is developed.

Most of the operations to restore the operability of ventilation systems can be carried out directly at the facility without dismantling individual elements. If any components require serious repairs, they are removed and transported to the workshop. These works are organized and supervised by specialists of the management company. They are paid, of course, at the expense of funds collected from residents.

The cost of work is determined by several factors:

whether there are hatches in the ventilation system for its inspection and inspection;
how dirty the channels are;
whether there are difficulties with access to communications;
what kind of contaminants are present in the channels.

For a general guide, we give an approximate price list for maintenance and cleaning of ventilation ducts in an apartment building.