Maintenance of ventilation List of work. Service supply ventilation

Modern ventilation system is a complex complex various devices and aggregates, therefore requires regular professional service. During operation, the equipment is experiencing significant loads that can cause damage, failures, reducing performance efficiency. Maintenance of ventilation and air conditioning is aimed at maintaining the system in working condition, warn, and if necessary, corrected problems.

Types of jobs

If you have a ventilation system in your building (apartment, shop, office), then optimal method Its service will be the conclusion of a contract with a specialized company. This type of cooperation is more profitable and more convenient than the wizard invitation at each next breakdown.

Ventilation systems maintenance services include preventive inspections And work, thanks to which the equipment acts properly, without requiring a large repair. Since reliable ventilation work is directly related to the well-being and health of people, the importance of service is obvious.

Service list

Under the design errors, as well as in the absence of maintenance Ventilation systems quickly fail, their performance is reduced.

Diagnostics of faults

In the process of diagnostics, the wizard checks the health and integrity of all important elements of the system. For diagnostic work, special tools are used and measuring instruments. Specialist assesses:

• condition of air ducts, mines and cameras;
• connection density and integrity of parts;
• the level of pollution of filters;
• the condition of the fans, heat exchangers, coolant.

To assess the operation of the system as a whole, the temperature and pressure of the air is measured.

Setup equipment

For efficient work ventilation system It is necessary that all the equipment worked smoothly. The equipment setting includes the following operations:

• lubrication and configuration of the fan engine, bearings;
• cleaning filters, air intake and air distribution grids;
• adjusting automation;
• elimination of defects for fastening the elements of a system, loose-preinhibitions.

Service and warranty service

After installing and starting the ventilation system, a warranty is distributed on the equipment. In the period of action, the warranty is carried out warranty service Ventilation. This service It turns out in the framework of the standard regulation. At the end of the warranty, service is provided. This service provides for equipment diagnostics, current repair, if necessary, executed overhaul. An important part of the maintenance of ventilation and air conditioning is disinfection of lattices, hatches and fans.

Repairs

If the diagnosis shows that the system has breakdowns, violations, then current or overhaul is required.

Current repairs are made on site, without dismantling designs. Disassembly, inspection, elimination small defectsReplacement parts, equipment assembly.

Overhaul is made at large breakdowns and provides dismantling individual elements or the whole system. Disassembled nodes are being repaired in the workshop or at the factory, then the equipment is again mounted in place.

Stages of work

The maintenance of ventilation systems consists of the following steps:

1. inspection, system diagnostics, fasteners check;
2. purification of air ducts, filters, lattices, fans;
3. disinfection of the system;
4. checking the technical condition of fans, heat exchangers and other system parts;
5. control temperature and air pressure;
6. automation checks and other works.

According to the results of scheduled maintenance, a decision is made on the need to repair the system.

The cost of maintenance and repair of ventilation Depends on a number of factors - characteristics of the system, its performance, availability additional equipment and automation. On the website of our company there is a table for which you can find out how much repair and maintenance of ventilation systems will cost in your building.

"With the design errors made, as well as in the absence of maintenance of the ventilation system, quickly fail"

He says lead destination.

System supply ventilation - An indispensable solution in the conditions of urban apartments and offices, where it is impossible to get a healthy microclimate, just opening the window.

The supply devices are injected to air portion from outside, by parallel producing its cleaning and heating / cooling, depending on the time of year.

The system should work without failures, because the health and activity of people in the room depends on it. Many companies professionally perform supply ventilation. Consider what work is included in the list of services of such companies, and how much will it cost to maintain exhaust ventilation.

Even if the system works properly, a mandatory planned inspection must be performed at least once a year.

If the ventilation plant has a solid work experience, or works in high wear conditions (especially in the pool, bypass or workshop), check and maintenance must be carried out more often than 1-6 months.

This is a considerable amount of work, requiring professional knowledge, equipment and taking a lot of time, so entrusting the service is better than a team of specialists.

An extraordinary check need to be arranged if there are signs of reducing efficiency: outsiders, condensate and heavy air, smells, dustiness.

Bring the strip of paper to the ventilation grille, if there is a good traction, it must be intensely squeezed; If not, it's time to call the service.

Checks on de-energized equipment

If you speak short, experts must check the integrity and tightness of the air ducts, the serviceability of the electrical part and ground, clean the filters and channels, make sure that the fasteners and the correctness of the settings.

Details are working on each organization individually, therefore, before concluding an agreement, read the list of services that are provided.

Primary check may look like this:

1. Visual inspection. It is carried out to identify external malfunctions, depressurization and leaks (heat exchangers, seals, fasteners, etc.). Flanges are tightened, connections; Bearing wear is checked, pulleys.
2. Electrician. Electrical chains, connectors, contacts, starters are checked and stretched.
3. Resistance. The electrical resistance on the elements (fan engine, damper drives and adjusting valves, fan drives, pumps, engine windings) are monitored.
4. Freon. An inspection is done for leakage.
5. Fan blades. Checked free move, direction of rotation.
6. Inspection of the drainage system.
7. Air filters are cleaned or change.
8. Heat exchanger. Cleaning from dust and dirt fins of heat exchangers.
9. Lubrication. Checking the presence of lubrication in all moving elements of the design.
10. Grids. Inspection and, if necessary, cleaning them.

Find out if the list of works are not only cleaning the air ducts, but also disinfection of channels and installation elements. Air conditioning is favorable conditions for mold and fungi.

Checks when equipped equipment

1. Noise. An assessment of the level of sound and extraneous noise during operation.
2. Fan. The movement of the impeller in working condition is estimated, the degree of heating of the housing, belt tension.
3. Electrician. Power supply is checked: deviation from the current normal and voltage.
4. Protective elements. The functioning of an emergency shutdown is checked.
5. Compressor. Power is measured, operating parameters; Working current and launcher.
6. Measurement of the volume of the processed air. It is also checked compliance with the degree of heating and cooling air in fact, the indicator that was declared initially by the manufacturer. The humidity in all areas is measured - from the input valve to the output grille.
7. Check automation.
8. Evaluation of the work in general the ventilation system and repair work, in case of need.

Diagnostics of working ventilation

At the end of the inspection, the Center staff fill the technical documentation on the work and status of the system.

If in the course of the inspection it turns out that the repair or replacement of any element is required, employees can eliminate the problem service CenterBut for a fee. Minor repairs that are not related to the replacement of nodes should be included in the terms of service.

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Ventilation maintenance cost

In any company there is a price list for planned inspections, but still the cost of services may vary depending on:

1. The complexity of the system.
2. The degree of its wear.
3. How difficult it was to get to the ventilation units.
4. The number of caloriems installed and control nodes.
5. The volume of works that had to be performed.

Some companies establish separate tariffs, in accordance with what type of air conditioning applies. Namely electric or water heating air; Water, glycol or freon are involved in the cooling system. The maintenance of the latter is usually worth most.

The main criterion that is reflected in the price list is the power and performance of systems. One full inspection of the supply ventilation will cost:

• Less than 5 thousand m 3 / h \u003d 3.5-9.6 thousand rubles.
• 5-10 thousand m 3 / h \u003d 4.2-14.6 thousand rubles.
• 10-20 thousand m 3 / h \u003d 5.1-18.3 thousand rubles.
• 20-30 thousand m 3 / h \u003d 7.5 - 20.5 thousand rubles.
• 30-40 thousand m 3 / h \u003d 10-24 thousand rubles.
• 40-50 thousand m 3 / h \u003d 12-27.4 thousand rubles.

Most companies offer good discounts on regular technical. Service if a long-term contract is concluded.

Conclusion

If you neglect the planned service of ventilation systems, this will lead to the accumulation of dust, fat and other dirt in the channels, reduce the speed of air, energy consumption is growing and, in the end, the loss of expensive equipment.

In addition, some time can pass before the detail has been purchased, replaced and the system will start again.

And if in a small office or cottage temporarily can be content with the opening of the windows, then the production of simple ventilation may threaten damages.

According to construction standards, in any building should be the ventilation system is designedable to provide fresh air indoors. On average, each person should have from 30 to 60 cubic meters of fresh air per hour.

Solve this task capable forced ventilation, one of the simplest system ventilation systems. Despite its economy and the simple work principle, supply unit It became a worthy alternative to expensive and technically complex climate control systems. The principle of her work is simple: by inlet installation fresh air Enters the room and displaces dirty.

The low cost of installation and simplicity in operation is not the only advantages of the supply installation. There are others:

• firstlyRelatively small installation size - it simplifies the process of installation and maintenance of equipment and reduces the cost of these works.
• secondly, Audio, in addition to supplying fresh air to the room, performs additional useful features: cleaning, cooling / heating air and humidity adjustment.

Regular service of climatic systems contributes

Economy
Possession of the ventilation system, taking into account all costs, can do much cheaper if they conduct regularly technical inspection Available climatic equipment. With regular maintenance of supply installations, the risk of occurrence decreases emergency situations When operating. For the normal functioning of the supply installation, it is enough only three or four times a year to carry out a comprehensive technical inspection. If you compare the cost of visiting a specialist serving climatic equipment, with the cost of repairing the system, then the benefit from regular maintenance of the supply installation It will become obvious. There is significantly reduced regular maintenance. service life of the supply ventilation system. Replacing a defective climate system inevitable, and buying new Installation And the dismantling of the old will cost them to a considerable amount.

Increase installation power
No secret is that over time, the installation power decreases, and failures in the output or supply of air occur. It is this reason that the lack of fresh air and accumulation of carbon dioxide in the premises is explained. The consequence of this is the emergence of frequent ailments from office employees. With timely and high-quality cleaning of the inner parts of the ventilation system, which is included in the regulation of regular maintenance of climatic equipment, the quality of the operation of the supply installation will be at height.

Improving the security of the air conditioning system
Everyone knows that there is no perfer place for rapid life bacteria than air filters ventilation equipment, cleaning and disinfection of which is carried out irregularly. If the contaminated device continues to function, it becomes the rapid propagation of millions of viruses and bacteria in all rooms. This explains the infection of all employees of the office during the cold or influenza epidemics.

Maintain cleanliness and freshness
Irregular comprehensive technical inspections of equipment support systems It can cause accumulation of garbage, dirt and fat sediments inside the ventilation equipment, so unpleasant odors may appear during installations. Warns appearance unpleasant odor During the functioning of the device, regular cleaning of the installation body and its heat exchanger. Well-groomed, clean modern inlet installation will always be a stylish addition to the interior of the room.

Compliance with the rules and rules of fire safety
In the fall and in summer, leaves and poplar fluff can fall into the body of external blocks of ventilation equipment. They may cause fire. Owners of equipment, regularly passing comprehensive technical inspections, you can not worry about the risk of fire hazardous situation, since work included in such inspections on cleaning external enclosures of climatic systems.

List of works conducted with the maintenance of the supply installations:

• Inspection of the external installation design, including testing the reliability of fasteners and fences.
• Lubrication of equipment bearings.
• Quality cleaning air filters.
• Inspection of electric reinforcement (shut-off, regulating).
• Control, fixing the testimony of the kip, including the status of the automation.
• Phase power test.
• Check the functionality of the water pump.
• Check the functionality of the drainage.
• Inspection drive belts Installations.
• Inspection of the state of the heat exchanger.
• Testing power, control circuits with a broach of threaded type connections (if necessary).
• Control and adjusting the three-way valve in the water air heater.
• Testing and adjusting the three-way valve in the water air cooler.
• Inspection of the equality of the fan pulleys, the leading pulley of the ventilation equipment, followed by adjustment when necessary.
• Implementation of the centering and cleaning of the impeller.
• Control of the position of the protection of belts protection in the installation.
• Loading springs of depreciation in a motler.
• Testing fixtures on flexibility and strength.
• Cleaning drainage by chemical compositions.
• Testing the state of water filters with a steel grid and cleaning filters when needed.
• Cleaning lattices blinds.
• Monitoring the tightness of air ducts of ventilation devices.
• Cleaning the heat exchanger of the device Through chemical compositions.
• Cleaning the inner cavity installation.
• Air duct seal.
• Control of fan electric motors bearings.
• Brief instruction for users for use ventilation units.

From the type of room in which the inlet installation is used, the frequency of comprehensive technical inspections of the device depends. According to construction standards and rules, the maintenance of ventilation equipment is carried out on the following dates:

• Supply installations of grocery stores, restaurants, car services, server, flower shops Must undergo a comprehensive technical inspection of ventilation equipment monthly.
• For ventilation systems administrative buildings, business centers, unproductive shops, offices and apartment buildings, maintenance work should pass quarterly.

Cost of one-time maintenance

The main task of an effective ventilation system is to provide access and exhaust air, temperature control, as well as air filtration. For the full performance of these tasks, the installation of special equipment is required, as well as the layout of the air ducts, which means periodic inspection and adjustment. But even when indoors are the basis of natural systemIt requires periodic cleaning of air ducts, which means that ventilation maintenance must be carried out in the premises of all types: civil or industrial.

Signs and reasons for reducing the efficiency of the ventilation system

It is often in the bathroom on the walls or mirror condensate formed, and in residential premises (living room, bedroom) is a stagnation of air, and the smells in the kitchen are not removed in the kitchen after cooking, but distributed throughout the housing.

All these factors indicate that the ventilation system does not cope with its task to ensure the influx of fresh air, as well as its effective exhaust.

Check the power of thrust in the air duct, if you bring to ventilation grille Paper strip. The quality of the system is determined by the intensity of the oscillations: what they are more, the better the air exchange.

Ventilation service makes it possible to prevent most of the possible negative consequences, including: blockage on one or more regions of the ventilation channel, depressurization of the air duct, failure of the equipment, reduced efficiency due to the filter blocking or other technique nodes. But completely eliminate the likelihood of a sudden breakdown is impossible, because due to the totality different conditions There is always a danger of fault formation. But it is possible to reduce such a probability if you follow the frequency of ventilation service.

As a rule, the frequency of such works is 1-2 times a year ( required minimum - 1 time per quarter). But it is recommended to inspect and prevent two times more often, that is, 1 time in two or three months.

A number of tasks that solve preventive inspection

Independent control of the operation of the system Suppose if the ventilation is not equipped with high-tech equipment and complex distribution network ventilation canals. It will not cause difficulties to maintain ventilation of residential buildings if it contains access to the main nodes of the system. In the presence of less functional equipment (inlet valves with filter, exhaust fan) You can clean it yourself.

Maintenance of ventilation systems of large production facilities, civil premises (restaurants, cafes) and monoblock installations in residential buildings implies a number of tasks, including:

• Periodic inspection of all components of the system, including fixing equipment.
• Check the density of the fitting of the filter pads, which will avoid penetration of an external polluted medium into the room, bypassing the filtration system.
• Inspection of the blades of the fan rotor, nozzles.
• Maintenance of ventilation implies a replacement or cleaning of filtering pads. Here the number of works depends on the type of filter. May also be required full replacement Filtration systems.
• The effectiveness of the air purification is checked.
• All valves present in the system and ventilation blinds are checked for performance.
• Maintenance of ventilation systems necessarily includes inspection of air ducts and checking the attachments of all suspended ventilation channels.
• The control sensors of the air parameters should also be checked for functionality and matching the real temperature values, air humidity.
• The system tightness is checked. In addition to inspection internal surface Ventilation channels are performed external inspection, including also assessing the state welded seams On the entire length of ventilation mines.
• Service sUPPLY SYSTEM It should include testing all automation, as well as electrical circuits. The voltage can be performed on the main nodes of the system.
• Checking the compliance of heating or cooling the air of the values \u200b\u200bthat fix the equipment.

Evaluation of the operation of the ventilation system combined with air conditioning

The front of the works that need to be produced, each ventilation repair and maintenance organization determines independently. Therefore, before entering into a contract for inspection and commissioning of the system, it is recommended to familiarize yourself with the services that the company offers.

Maintenance of ventilation and air conditioning involves an increase in tasks, since in addition, in addition to evaluating the operation of the ventilation equipment, it is necessary to check the operation of air conditioners.

It depends so much on what type of system is selected. If a combined option is installed (the channel air conditioning is mounted in ventilation mines), the volume of work will be somewhat less than in the case when an autonomous split system is installed, since the exhaust ventilation and air-conditioning channels are separately performed. Accordingly, the cost may be higher, the price directly depends on the volume, duration and complexity of the work performed.

Service of air conditioning and ventilation systems implies not only cleaning and commissioning, but also disinfection of individual nodes. This is necessary as a result of the fact that the air conditioner forms favorable conditions for the appearance of mold and fungus. So, condensate regularly falls on the evaporator. It is precisely because of this, as well as the pollution in the humid surface in the mechanism may appear mold. Maintenance and repair of ventilation systems are aimed at eliminating any problems, as well as cleaning and disinfection of devices.

In order to carry out high-quality ventilation system, special knowledge and skills should have special knowledge. Conduct work related to the diagnosis, the repair of the ventilation system may exclusively master who received permission for this. In most cases, the Client is concluded a contract with the Contractor to provide services for servicing the ventilation system. Given the importance of this element of each building, a certain regulation of providing such services was created, which will be talked further to detail

Box: Important: Engage service One can only if the person or organization received the appropriate permission (license) to perform such works. Measures allowed to warn customer from low-quality services.

You can get a license to provide services in the service sector in the provision of the following documents:

1. A copy of the document that displays the company's charter.
2. Copy of the contract of institution.
3. A copy of the certificate of issuing OGRN.
4. When registering an enterprise, the information is underway to the USR legal entities. We need a copy of the certificate of change.
5. A copy of the document called the INN / CAT.
6. A copy of the testimony in which the fact of assigning the OKVED code is indicated.
7. Extract from state registry. At the same time, it is important to note that the extract for only 14 days is valid.
8. If personnel redevelopment has been conducted, a copy of a similar document is provided. Also need copies of changes in the statutory documentation, creating an enterprise.
9. Many organizations have a physical address. To establish it, you should provide a copy of the lease or purchase of real estate.
10. Copies of documents pointing to education general Director.
11. Copies of documents confirming that the main specialists have an appropriate education.
12. Settlements.
13. Passport details of the main specialists and the Director General to establish their identity.

It is important to consider that all documents must be notarized. Otherwise, they will not be considered legitimate. In this case, the license has standard View. The filed package of documents is considered within 30 days. Only after the license is received by the Organization or a separate person can provide services for servicing ventilation systems.

As previously noted, work can be carried out only when the contract between the client and the contractor. In this case, the document may contain the information below:

• Subject. This item contains information that displays the essence of the contract: the implementation of one-time work, setting warranty service and so on.
• Duties of the parties. An important point that displays what works will be made how payment will be made, who will supply the necessary details and so on.
• The calculation scheme and the total cost of work, if it is disposable. It is important to note that the provisions of the customer will be indicated in this paragraph. It all depends on the adopted payment scheme.
• The procedure for carrying out the process of receiving work. As a rule, the quality of maintenance determines the admission committee. Who should enter it and what reasons can be in negative verdict reception Commission - All these and other nuances should be specified in this section.
• Responsibility of the parties can also be called an important point of many cooperation contracts. At this point, it often indicates the responsibility of the Contractor for poor-quality work, the assumption of marriage and in terms of failure to meet the deadlines. The customer is responsible for providing conditions for work and timely payment.
• The procedure for resolving disputes is also set in the document component. Of course, the last instance becomes the court, but small problems can be regulated without the intervention of third parties.
• Final provisions.
• Addresses and details. As a rule, the legal and physical address of both parties is indicated.
• Application. The appendix indicates documents, other information carriers, on the content of which the compilation of one of the above items is carried out.

Registration of a contract for servicing the ventilation system

As a rule, lawyers are engaged in the work on the preparation of such a document. The compiled treaty is legally binding and in non-compliance with certain responsibilities, each Party may suffer responsibility, for which a trial is carried out.

A typical regulation determines what operation and which periodicity should be carried out. It is important to note that for each element of the system its own regulations are drawn up. Standard consists of the following items:

1. Calorifer, which conducts heating of the air supplied.
2. A fan that injected air to create pressure in the system.
3. Filters for separating large particles in the stream.
4. The flap that can overlap air or direct the flow in the desired direction.
5. Electrofasses create a separate system that feeds all elements and controls the correctness of their work.
6. Controllers that regulate the operation of the ventilation system.

Maintenance of ventilation systems

The regulation is drawn up on the basis of general recommendations With the direct conclusion of the contract between the customer and the Contractor.

Fan maintenance operations in the ventilation system have the following regulations:

• Professionals can visually conduct a system overview to identify the main points of work. The frequency of performing a visual review system with data fixation is 1 time in 3 months.
• The main problems of the system can be called strong heating of the main elements, the occurrence of strong vibration. Such phenomena are fixed in the created magazine. The frequency of inspection to identify the above problems 1 time in 3 months.
• Some structural elements can be launched when working. Strong bending leads to the occurrence of voltage in the material. To identify similar phenomenon Visual control of all bending elements is not less than 1 time in 3 months.
• Moving structural elements, as well as various fasteners are also susceptible to strong wear. Therefore, the frequency of their check is 1 time in 3 months.
• 1 time in 3 months is conducted by checking anti-belly mechanisms and different mounts. Also, with this periodicity, all other fasteners are inspected.
• When the slightest defects of the system should be fixed in the magazine component.
• Another detail that may fail with a long operation of the equipment is the bearing. A characteristic feature of their wear can be called an emergence of an outside sound. Verification of bearings is similarly carried out 1 time in 3 months.
• Many mechanisms have a belt drive that transfers rotation from the installed engine. As a rule, with the time of belts stretched, which leads to serious power losses. The inspection of this element is carried out once every 3 months.
• Isolation of the installed electric motor must be constantly in perfect condition. To check the insulation condition, periodic inspection is carried out 1 time in 3 months.
• Monitoring current and other network parameters is carried out once every 6 months.
• The study of all electrical wiring is carried out 1 time in 3 months. The main parameters, as well as connecting and other elements are inspected.
• Despite the supply of air under pressure in the system, dust can accumulate. Inspection of the system and its cleaning is carried out 1 time in 3 months.
• Cleaning the outer surface is carried out once a year.
• Drawing up a full system status report is carried out 1 time in 3 months.

1. Periodic inspection to identify breakdowns and serious contaminants is carried out 1 time in 3 months.
2. The control of the uniformity of heating is carried out 1 time in 3 months.
3. Inspection of the system to detect the fact of leakage, as well as repairing the repair to reduce the likelihood of such a situation, is carried out once every 3 months.
4. Air pumping from the circuit is performed 1 time in 3 months.
5. From the serpent, dirt and dust is removed 1 time in 3 months.
6. Switching off the fans is also controlled by specialists 1 time in 3 months.
7. The replacement of filter elements is carried out in need, but at least 1 time in 3 months is performed.
8. The record of all identified deviations in the created magazine is carried out periodically.

Air filters I. heating systems Check carefully. With strong clogging of his filter bandwidth significantly decreases. Also, do not forget that when the air heating system is violated, there is a possibility of failure of the system.

Checking ventilation systems

Electrical mechanisms are responsible for many functions of the system. That is why they are also subject to careful check. Once every three months, the work of the following type is performed:

1. Control opening and closing.
2. Conducting wiring, connections.
3. Research, which determine the degree of wear.
4. Measurement, control, change threshold values.

Controllers conduct diagnostics of the system to determine the features of the work. To ensure reliable operation of the system is carried out next work 1 time in 3 months:

• Diagnostics of fuses.
• Control various installations and parameters.
• Changing the initial parameters.
• Research related to the work of the controller.
• Check the wires that feed controllers.
• Testing a system for compatibility of all elements.
• Detection and elimination of pollution.

Yet important elements Constructions can be called sensors, thermostats, hydrostates. Works related to these systems are also held 1 time in 3 months. They are as follows:

1. Elimination of pollution.
2. Perform diagnostics for checking fixtures and enhance them if necessary.
3. Measurement Features at the output and reconciliation with set standards.
4. Replacement and repair of the considered elements in need.

The above moments reflect general rulesMounted for service. When drawing up a contract, changes may be made. In this case, the regulations for work is confirmed by both parties.

There are three documents that are compiled when servicing the ventilation system:

1. Passport of the ventilation system.
2. Log of operation.
3. Maintenance log.

All conducted activities associated with the ventilation system are registered in the journal. The information entered is the regulatory information. The magazine is issued by experts who perform work on servicing the ventilation system. The act of technical condition is drawn up in order to indicate the main performance. Created ACT allows you to make recommendations for maintaining the system.

Conduct service work specialists can according to the installed schedule and recommendations of the manufacturer of installed equipment. At the same time, the following recommendations can be distinguished:

• To start and stop the equipment can be exclusively in a specific sequence. The ventilation system should output all harmful substances from a high speed and high efficiency.
• Units that are installed in the ventilation system should be checked at least 1 time in 4 weeks.
• Calorifer, which is heated by air, is checked at least 1 time in 10 days.
• Cell oil filters are also checked with large periodicity.
• Ventilation grids are tested at least 1 time in 3 months. It should be noted that severe clogging leads to a significant increase in pressure in the system in the injection of air.
• When checking the system on the degree of noise, the density of the adjacent of all elements is determined. Sound-absorbing plates and seals can wear out during operation. All damaged materials should be restored.

The above moments should be considered when considering the issue of servicing the ventilation system. The correctness of its work affects the comfort. Also during the inspection of the premises on fire safety The fact that ventilation should work efficiently and stably.