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Timing for checking the efficiency of ventilation and air conditioning. Assessing the effectiveness of the ventilation system. Checking the effectiveness of ventilation in a medical facility

Commissioning of newly built or reconstructed facilities. Federal Law of December 30, 2009 N 384-FZ “Technical Regulations on the Safety of Buildings and Structures”. Article 20. Requirements for ensuring air quality: "In project documentation buildings and structures must be equipped with a ventilation system. The design documentation of buildings and structures may provide for equipping the premises with an air conditioning system. Ventilation and air conditioning systems must ensure the supply of air containing harmful substances, not exceeding the maximum permissible concentrations for such premises or for working area production premises."

Inspection of existing ventilation systems in accordance with the current requirements of Rospotrebnadzor and Rostekhnadzor. For compliance with thematic GOSTs, SanPiNs, RDs and other regulatory documents.

Inspection of ventilation systems to develop measures to improve working conditions.

Only a licensed/certified/accredited organization can conduct ventilation efficiency assessments. Procedures confirming the effectiveness of ventilation systems are activities that require special skills and knowledge of the regulatory framework.

1. Buildings and premises with constant presence of people, without the emission of harmful gases and dust, equipped with a microclimate maintenance system. Such objects include almost all modern office buildings and shopping centers.
2. Industrial buildings and premises releasing pollutants into the air of the working area.
3. Premises with special requirements for the composition of the air environment and microclimate: kindergartens, hospitals, schools.

As you can see, ventilation is used in almost every building and room.

1. Periodic ventilation of rooms through windows and doors.
2. Ventilation with natural and mechanical draft stimulation.
3. Systems air heating and conditioning.

Ventilation is a sanitary and technical means that completes the system of measures to improve the air environment of indoor spaces. With the help of ventilation, they combat excess heat and moisture, as well as gases, vapors and dust.

Direct methods include the speed and temperature of air flows, productivity, developed pressure and fan speed, pressure difference or vacuum, noise and vibration of ventilation system elements, concentration of harmful substances in the supply air.

Indirect methods include assessment of the compliance of the air environment of the production premises with sanitary standards in terms of the concentration of harmful substances in the air of the working area, temperature, relative humidity and air mobility, intensity of thermal radiation.

The effectiveness of ventilation is checked by measuring the temperature and speed of air flows in the work area, open openings and working sections of air intake devices, as well as installation, transport and aeration openings, in the supply streams from air distribution devices, air showers and curtains, as well as determining the performance of fans and the pressures they develop in the supply and exhaust systems, general exchange, local suction and aspiration shelters built into the equipment and measuring the pressure difference or vacuum in production premises relative to neighboring rooms or atmosphere, in cabins, boxes, shelters.

Performance of ventilation systems of local suction, aspiration shelters, etc. determined by the formula:

L = Vav*F*3600 m3/hour,

Where Vav is the average speed, m/s, F is the cross-sectional area of ​​the opening, air duct, local suction. 3600 is the number of seconds in one hour.

Based on the results of the measurements, a passport is drawn up ventilation system, which is used as the final stage of certification ventilation units. Also, only a protocol of instrumental measurements can be drawn up if a passport for the ventilation unit is already available.

The ventilation unit passport is the main document in which all test results, parameters of the studied environment are recorded (humidity level, temperature, chemical composition air and its mobility). The passport gives the right to official use of a specific object, confirms the completion of all the necessary complex of design, adjustment and testing works. Certification is needed to register purchased ventilation equipment (this is especially true for public and industrial buildings), confirmation that the requirements of sanitary standards are met.

One of the conditions for proper operation of ventilation systems is constant production control, or assessment of their effectiveness. It is carried out to identify pressure losses and unaccounted air flow. Periodic evaluation of ventilation performance is an important part of its use.

The main purpose for measuring ventilation efficiency is to detect problems and malfunctions that pose a danger to people in the premises and the entire building as a whole.

The secondary objectives of the audit are:

• assess whether the calculations were made correctly at the design stage of the ventilation system;
• find out if good enough existing installations cope with loads, how to maintain traction;
• find opportunities for energy saving and reduction of system operating costs;
• confirm compliance with the standards and requirements of sanitary and epidemiological, technical supervision, and fire authorities;
• recalculate the parameters of the system after its modification, reconstruction, repair;
• successfully pass passport certification.

To prevent excessive accumulation of carbon dioxide, people remained able to work, did not feel drowsiness, malaise, or dizziness, the ventilation ducts must be clean and passable. Complete air exchange is especially important where there are conditions for the formation high humidity(kitchens, saunas, showers, swimming pools) - in a favorable environment for them, bacteria, mold and mildew quickly multiply.

For production, warehouse and laboratory complexes, assessing the efficiency of ventilation systems is also necessary. If explosive, volatile, toxic and flammable substances are not removed from the premises, this will lead to dramatic consequences. The equipment can work, but does not completely extract all the polluted air, it is difficult to supply fresh air from the outside, which negatively affects the microclimate in the premises.

The main legal acts regulating the need and procedure for assessing the effectiveness of ventilation systems:

• Federal Law "On the Sanitary and Epidemiological Welfare of the Population" dated March 30, 1999 N 52-FZ;
• GOST 12.4.021-75 System of occupational safety standards (SSBT). Ventilation systems. General requirements(with Amendment No. 1);
• GOST 12.3.018-79 System of occupational safety standards (SSBT). Ventilation systems. Aerodynamic test methods;
• GOST 12.1.005-88 System of occupational safety standards (SSBT). General sanitary and hygienic requirements for the air of the working area (with Amendment No. 1);
• GOST 30494-2011 Residential and public buildings. Indoor microclimate parameters (with Amendment);
• GOST R 52539-2006 Air purity in medical institutions. General requirements;
• GOST R EN 13779-2007 Ventilation in non-residential buildings. Technical requirements to ventilation and air conditioning systems;
• SanPiN 2.2.4.548-96 Hygienic requirements to the microclimate of industrial premises;
• SanPiN 2.1.2.2645-10 "Sanitary and epidemiological requirements for living conditions in residential buildings and premises";
• SanPiN 2.1.3.2630-10 “Sanitary and epidemiological requirements for organizations engaged in medical activities” (as amended as of June 10, 2016);
• SP 73.13330.2016 (SNiP 3.05.01-85) Internal sanitary systems of buildings;
• SP 60.13330.2012 Heating, ventilation and air conditioning. Updated version of SNiP 41-01-2003;
• SP 1.1.1058-01 Organization and conduct of production control over compliance sanitary rules and implementation of sanitary and anti-epidemic (preventive) measures;
• R NOSTROY 2.15.3-2011 Internal engineering networks of buildings and structures. Recommendations for testing and adjustment of ventilation and air conditioning systems;
• Input parameter for indoor climate to the design and assessment of energy performance of buildings - indoor air quality, temperature, light and acoustics (DIN EN 15251-2012 Indoor environmental input parameters for design and assessment of energy performance of buildings addressing indoor air quality, thermal environment, lighting and acoustics);
• Ventilation of non-residential buildings - General Basics and requirements for ventilation units and air conditioning systems and cool room systems (DIN EN 13779-2007 Ventilation for non-residential buildings - Performance requirements for ventilation and room-conditioning systems; German version EN 13779-2007:2007) and others.

Checking the effectiveness of ventilation is a set of measures, measurements (laboratory, instrumental) and observations carried out by qualified specialists. They determine the speed of air movement in the elements of the system and calculate key parameters (for example, multiplicity).

The list of studies includes:

• assessment of natural ventilation - channels, technical openings, vents, etc.;
• inspection of mechanical installations and equipment - it is necessary to evaluate the performance of supply and exhaust systems, their aerodynamics, and conduct laboratory tests.

The set of verification procedures when analyzing the effectiveness of ventilation systems includes the following actions and measurements:

• checking flexible elements for damage, tightness of housings, casings and air ducts, fan balance, integrity and quantity of belts and drives;
• measurement of air flow speed, CO2 content, calculation of multiplicity, determination of all microclimate parameters, sampling in work time, at several points;
• carrying out aerodynamic tests according to GOST methods - using pneumometric holes;
• entering test results into summary tables, processing, drawing up inspection protocols, reports and conclusions.

Monitoring the efficiency of ventilation systems (production control of ventilation systems) heating, ventilation, air conditioning systems, smoke protection. The efficiency of ventilation systems is monitored to determine pressure loss and air flow in ventilation systems. Such control means their testing in order to improve the efficiency of ventilation systems and to evaluate the performance of the enterprise maintenance service.
Further activities following the efficiency check are drawing up a ventilation system passport and calculating the air exchange rate at the facility, comparing the values ​​obtained during control with the design ones. All test results are recorded in a protocol, reflecting the identified deficiencies and recommendations for their elimination. The protocol is attached to the ventilation system passport.

Frequency of monitoring the efficiency of ventilation systems (industrial ventilation control) in accordance with clause 5.1. VNE 11-88:
- periodic testing of existing ventilation systems serving industrial premises of categories A and B is recommended to be carried out at least once a year;
- periodic testing of existing ventilation systems serving production premises of categories B, D and D is recommended to be carried out at least once every 2 years;

Frequency of monitoring the efficiency of ventilation systems (industrial ventilation control) in accordance with clause 1.7. MU 4425-87:
- once a month – for premises with possible allocation hazardous substances 1-2 classes;
- once a year – for premises equipped with local supply and exhaust ventilation;
- once every three years – for premises equipped with general mechanical and natural ventilation.

Checking the effectiveness of ventilation is a set of laboratory and instrumental measurements carried out by an accredited laboratory. In particular, the speed of air movement in air ducts and ventilation ducts is measured, and the air exchange rate is calculated.

This complex may include:
Checking natural ventilation. Initial inspection of the ventilation system ducts when putting the facility into operation. Based on the results of the inspection, an initial inspection report is drawn up.
Examination artificial ventilation. All elements of the supply (exhaust and mixed) ventilation system are examined for operability. Based on the results of the inspection, a protocol for laboratory measurements of the aerodynamics of the system is prepared. The customer is issued a ventilation system passport and a document (conclusion) confirming compliance or non-compliance with the design parameters.

Carrying out work on certification of the ventilation system.

Certification of a ventilation system is a check of the condition of all elements of the ventilation system when it is put into operation, during which all necessary aerodynamic tests and measurements are carried out. The test results are recorded by specialists in the passport of the ventilation system of the object being tested. When carrying out certification of ventilation systems, they also carry out expert assessment air parameters: temperature, humidity, composition analysis air masses and the degree of their mobility.

The ventilation system passport is an important technical document that gives the legal right to introduce a specific unit ventilation equipment into operation, and confirming completion full cycle works (design, installation, commissioning) in accordance with the current regulatory and technical documentation.
This document includes the following information:
- name of the certified organization carrying out this type works;
- name and address of the object;
- name and purpose of the system, its location;
- main technical characteristics of the equipment;
- table of projected and actual air flow rates, indicating the percentage of deviations;
- axonometric diagram of the system, indicating the points of measurements taken;
- conclusion and signatures of representatives of the design and commissioning organization.

The ventilation system passport is necessary for the customer to register the purchased equipment and its regular use in order to achieve the necessary sanitary and hygienic air parameters.

_________________________________________________________________________________________________________________
VNE 11-88 "Instructions for the safe operation of ventilation systems at enterprises of the USSR Ministry of Chemical Industry"
MU 4425-87 "Sanitary and hygienic control of ventilation systems for industrial premises"
SP 60.13330.2012 "Heating, ventilation and air conditioning. Updated edition of SNiP 41-01-2003"
R NOSTROY 2.15.3-2011 "Recommendations for testing and adjustment of ventilation and air conditioning systems"

Technology company Construction Control» provides services for testing the effectiveness of ventilation systems at facilities:

production premises and complexes;

medical organizations and institutions;

X-ray rooms;

dental clinics;

public and administrative buildings;

cafes, restaurants, organizations Catering;

shopping centers and shops;

apartment buildings with natural and mechanical ventilation;

individual houses and cottages.

Based on the results of the inspection, we draw up and enter data into the ventilation system passports, provide protocols from an accredited laboratory, issue acts, certificates and technical reports on the inspection.

What is ventilation system efficiency testing?

Checking the effectiveness of the ventilation system is a check of compliance of air exchange in premises with the requirements laid down in the project or the requirements of sanitary and hygienic standards.

Why is performance testing needed?

A properly designed, installed and well-functioning ventilation system is neither visible nor audible. But, alas, this does not happen often. But the point of ventilation is to ensure the air quality necessary for human work, life and health! Therefore, disruptions in the operation of ventilation systems primarily affect the health and well-being of people. Indirect signs of unsatisfactory ventilation are poor health, drowsiness, and decreased productivity. In order to avoid negative consequences due to disturbances in the operation of ventilation and its effectiveness needs to be checked.

The only way to check the effectiveness of ventilation is instrumental control. The professionally accurate title of this work would be “Aerodynamic testing of ventilation systems.”

Using instruments according to established methods, specialists determine the actual parameters of ventilation operation and compare them with design or standard ones, if there are established standards for a given facility.

Properly functioning ventilation is necessary for those who operate the facility. If ventilation is ineffective, it is better to turn it off to save thermal and electrical energy.

Check frequency

The frequency of checking ventilation efficiency for most facilities is once a year for exhaust and local supply air, once every three years for general supply and air curtains. This frequency is established in the relevant sanitary standards, which are developed for many types of facilities, for example:

Medical institutions, according to paragraph 6.5 of Sanitary Norms and Rules 2.1.3.2630-10, must check the effectiveness of ventilation once a year;

X-ray rooms, according to paragraph 10.21 of Sanitary Norms and Rules 2.6.1.1192-03, must have their ventilation at least once a year;

If there is no industry standard, they turn to the old methodological instructions for Rospotrebnadzor:

Guidelines No. 4425-87 prescribe:

in rooms with emissions of harmful substances, carry out inspections at least once a month;

for local exhaust and supply systems once a year;

for general exchange and natural systems once every three years.

This frequency may be sufficient for systems that have undergone high-quality commissioning. If commissioning is poor or absent, which is very common, the systems immediately work ineffectively.

The quality of installation is also great importance. Incorrect technological solutions, unjustified use of aluminum tape and flexible air ducts, poor fastening lead to the fact that during the first year of operation the networks very quickly lose their tightness, and when the first check is carried out after a year of operation, defects are identified, as a result of which air exchanges are less than the norm.

Taking this into account, it can be considered that it is better to carry out the first efficiency check after commissioning as early as possible, in the first year of operation. The frequency of subsequent inspections can be increased, modern air supply units It is better to check more often - annually. General exchange hoods usually work stably, they can be checked less often - once every three years.

Curtains and roof fans really don't need to be checked often, they either work or they don't throughout their entire lifespan, so they can be checked less frequently, once every five years.

Standards

The main standard for checking ventilation is the project approved by the Rospotrebnadzor authorities. Design air exchanges and balances must be ensured in all rooms. Standards are often tied to the volume of premises, and are expressed in the form of air exchange rates.

If there is no project, then you can use industry sanitary standards, SanPiN. If there are no industry sanitary standards, they use building codes, SNiP and SP. If there are none, then you can refer to recommendations for the design of the corresponding objects.

Scope of work

The scope of work is determined by the needs of the customer. For example, vibration measurements reveal that a fan motor is severely worn and may soon fail. This important information and for some ventilation systems for industrial and medical purposes it is critical, since work without ventilation is impossible. Therefore, the engine or ventilation unit is replaced before it actually fails. In addition to the standard vibration diagnostics, our laboratory also uses thermal imaging diagnostics. Checking the ventilation units with a thermal imager immediately shows whether the engine or bearing assemblies are overheated.

If there are no complaints about noise and vibration, and a simple separate ventilation system can be tolerated for one or two weeks, then vibration need not be measured.

Technical task

Knowing his real needs, the customer draws up technical task to check ventilation, which can be used to determine the composition and scope of work for a particular facility.

Sometimes the customer does not have technical specialists, then he entrusts the development of technical specifications to the contractor. In this case, before drawing up the assignment, a preliminary examination of the ventilation condition of the facility is necessary. It happens that the systems have not been used since construction and are partially dismantled, but continue to be considered operational.

If the task is done without a preliminary examination, then most likely the amount of work and the price will be inflated.

Work program

Based on the technical specifications and documentation provided by the customer (project, passports, technical reports), the contractor develops and agrees on a work program.

Specifics of performance testing

To check the effectiveness of ventilation, it is typical that the work is carried out at an existing facility. Features of the work depend on the type of object.

For healthcare facilities, this means coordinating schedules with facility usage patterns. For example, in operational work carried out before disinfection.

In shopping malls, work in trading floor are not held during peak traffic hours. For some types of objects, work is only possible at night.

At explosive and fire hazardous facilities there are restrictions on permitted devices.

Methodology

The measurement methodology is industry-wide, GOST 12.3.018-79. Large organizations on its basis, they often develop and approve their own methods, taking into account modern instrumentation or foreign methods.

Performers

Our Ventilation Laboratory is accredited for all types of measurements related to testing the effectiveness of ventilation.

Accreditation means that specialists, instrumentation, methodological and normative base, the internal quality control system of our laboratory is verified by an independent public service - Federal Service according to Accreditation, and are recognized as meeting the requirements.

In regulations related to medicine, as well as in some industry standards, for example STO Russian Railways 15.003-2014, accreditation of a laboratory is a mandatory requirement.

results

The results of inspections are entered into the passports of ventilation units indicating the date of measurements, protocols are issued, usually in two copies, one is attached to the passport. Where standards are expressed in multiples, a table of air exchange rates is additionally provided.

Sometimes the customer wants to receive more complete information, in the form technical report, air balances and list of defects. This requirement must be agreed upon before work begins.

If a detailed technical report is required with a list of defects and measures to restore or improve operating parameters, the adjuster team should include not only measurers, but also an experienced ventilation engineer.

The state of ventilation largely determines the level of compliance with the existing working conditions in the organization. regulatory requirements. It is clear that at the design stage, the required efficiency, the ability of ventilation systems to provide comfortable and safe conditions for people to work in them. But, during the process of construction, and then operation, over time, deviations from the results of the functioning of ventilation systems established by the project accumulate. They become ineffective for many reasons. But, as a rule, not everything.

Experts from Expert Ecology LLC carry out work on:

Hygienic and (or) technical assessment of the efficiency of ventilation systems;

Measurements and assessment of industrial gas and dust emissions into the atmosphere from sources at industrial enterprises.

Such work is authorized to be carried out only by organizations that have a duly accredited testing laboratory and specially trained specialists (clause 1 of article 42 Federal Law 52-FZ).

The testing laboratory of Expert Ecology LLC is accredited (accreditation certificate No. RA.RU.21VG04). Specialists of Expert Ecology LLC have appropriate training in approved methods.

The purpose of the work is to determine the compliance of the performance parameters of ventilation systems with regulatory requirements, to determine the concentrations of harmful substances in the air of the work area and in emissions into the atmosphere.

Scope of work:

Hygienic/technical assessment of ventilation systems performance:

Inspection of ventilation systems (condition assessment, study of documentation, determination of points for instrumental measurements), calculation of the cost of work;

Carrying out instrumental measurements of air movement parameters, parameters of gas and dust flows (and the content of harmful and/or hazardous substances in the air) at pre-calculated points;

Determination of the air exchange rate in the rooms where it should be determined;

Carrying out calculations, assessments and registration laboratory and instrumental measurement protocols with a brief conclusion about the efficiency of ventilation systems.

Compilation of a report inspection of ventilation systems with a description of their current technical condition and operational efficiency, as well as recommendations to eliminate the causes of ineffective operation of the surveyed systems.

Registration (or renewal) of passports ventilation systems in accordance with the current regulatory documentation(collection technical characteristics, drawing up aspiration schemes).

Held:

Periodically, in educational and healthcare institutions;

Periodically, in production premises.

When commissioning construction projects;

Ventilation systems must be checked for operating efficiency:

a) in premises where the release of harmful substances of classes 1 and 2 is possible - once a month;

b) local exhaust and local supply ventilation- once a year;

c) general mechanical and natural ventilation systems - once every 3 years (except for healthcare institutions - there annually).

Why do you need a performance assessment?

This is a kind of “ventilation audit”. From the report received after the work, any manager, even those far from technology, will see a specific Current state ventilation not in assessments like “bad” or “good”, but in specific numbers and terms characterizing this condition. And, overall, “good”:

Optimize costs for routine maintenance of ventilation systems;

Use laboratory research protocols when conducting hygienic (when the air is simultaneously examined for the content of harmful substances) assessment, for the purposes of “ Production control", which reduces its cost;

Get more positive results if you conduct a Special Assessment of Working Conditions.

If, in general, “not very good”:

It is realistic to estimate the volume and cost necessary repairs or restoration of ineffective ventilation systems;

Justify the amount of funding for repair or reconstruction of ineffective ventilation systems;

Generate technical specifications for the contractor for the repair or reconstruction of ventilation systems.

Cost of work. Calculated after an inspection of the work site. It includes: insurance professional activity, employee insurance, Vehicle, equipment and instruments of Expert Ecology LLC, overhead and other expenses necessary for the implementation of work. The work is carried out without the involvement of the Customer’s transport, without the distraction of the Customer’s employees, except for the responsible persons who must provide technical documentation and be present during laboratory tests.

Payment procedure. No advance payment. For large volumes - according to schedule. For the amount of work actually completed.

Turnaround time . From 7 days to a year, depending on the amount of work.

For the entire period of our work, claims, statements of claim and legal proceedings there were no service consumers or government regulatory authorities.

The construction of a residential building, even at the design stage, requires the presence of channels for natural ventilation. From a safety point of view, this applies primarily to houses with installed gas appliances. Improper circulation or insufficient air supply can also lead to negative consequences.

Checking ventilation as a vital necessity

By ventilation of premises we mean the entry of air from outside into the apartment, ensuring its ventilation, displacing gaseous waste products of humans, animals, etc. Ventilation systems include devices and equipment that provide regulation of air exchange. There are several types of ventilation systems, but in multi-storey residential buildings, supply and exhaust ventilation is mainly used.

Its absence or ineffective work will be immediately noticed by apartment owners in multi-storey building. Main features:

• deterioration of people's well-being;
• penetration of odors from neighbors;
• the formation of mold and mildew in the bathroom and toilet;
• high humidity in the rooms, laundry that takes a long time to dry;
• the spread of odors from the toilet and kitchen throughout the apartment.

If such symptoms are present, a ventilation check is performed. Its main goal is to eliminate the listed problems and prevent damage to household items and furniture. The main requirement is the creation of a healthy microclimate.

Analysis of ventilation efficiency: tasks to be solved

• Identification of compliance (non-compliance) of the microclimate with sanitary requirements.
• Analysis of work separately for inflow and exhaust gives a factual picture of the functioning of the home household appliances, devices ( gas boiler and slabs).
• Deficiencies identified during the inspection process may serve as a reason for cleaning ventilation ducts, arrangement of showers, installation additional equipment (supply valves, fans for forced exhaust, etc.)

Attention! Regulatory documents regulating the operation of ventilation are SanPiN 2.1.2.1002-00 (PDN of the microclimate and air environment of premises), an addition to SNiP 2.08.01-89 Reference manual “Heating and ventilation of residential buildings”, SNiP 31-01-2003 by types of systems ventilation and others. According to them, regular inspection of ventilation shafts and ducts is carried out once a year (at least). If heating and cooking installations are operated all year round, ventilation should be inspected at least 2 times.

How can you organize an inspection?

During the examination supply and exhaust systems compliance is revealed air exchange in different premises according to design requirements and sanitary standards. When in good condition, properly designed ventilation shafts are visually hidden and their operation is inaudible. There are several ways to check the ventilation in an apartment.

Match

The effect of a lit candle (match). A burning flame brought to ventilation grille in the bathroom or kitchen to a channel closed by a grill will show the operation of the ventilation. If the vertical column of flame, when the vent (window) is open, deviates into the room or remains in the same position, then the system is not working properly. But this method is dangerous and is not recommended by employees of the gas supply organization. If there is a gas leak in the house, an open candle flame can cause an explosion.

Paper

A safe, but no less effective “paper” option. At open window a sheet of newspaper or other thin paper placed against the grill should adhere tightly to it and be held in place by a pull rod.

These methods are justified only in the cold season. In the heat, at almost the same temperatures outside and inside the room, the laws of physics regarding the displacement of warm light masses by colder air do not apply. Therefore, regular ventilation is organized. If malfunctions in the ventilation operation are detected, measures are taken to eliminate them.

Devices

A professional ventilation inspection provides an assessment of the degree of blockage in floor and building ventilation ducts. The power of air draft and the degree of “suction” that occurs due to the formation of low pressure are checked.

Using instruments to evaluate ventilation efficiency

The most accurate ventilation test in apartment building– instrumental measurements. An anemometer is used. Can be purchased for personal use the simplest model. Representatives of the sanitary service work with more advanced instruments to calculate the air exchange rate in rooms of different purposes. Such anemometers provide remote sensors and embedded computing modules.

According to current standards, natural air movement should be:

• for the kitchen – 60 m3/h (without gas stove);
• for a bathroom and a bathroom – 25 m3/h.

The anemometer reading is the speed of air movement in the ventilation duct. Knowing it, as well as the cross-section of the lattice, you can use special tables to calculate the performance of the system.

Important! Measurements are taken for each exhaust shaft and the causes of identified failures in ventilation are determined.

Measuring algorithm

• Opening the window slightly creates an air flow.
• The ventilation duct is released from the grille.
• The impeller of the switched on anemometer is placed in the channel.
• The instrument readings are read.
• Actual measurements are compared with standard data.

Attention! In the exhaust ventilation shaft, the air speed must be at least 5 m/s. In bends - at least 3 m/s.

What problems does professional expertise solve?

Most often, the cause of fogged glass, the formation of fungus, dampness and stale air in the room lies in the mistakes of designers and builders. Their correction is impossible without radical measures: holding overhaul or home renovation. An independent inspection identifies shortcomings of builders during the installation of shafts, ducts, and highways, and also proposes measures to eliminate them.

Checking the ventilation in the apartment management company should be carried out on the basis of the “Rules for the maintenance of common property in an apartment building.” The document contains a list successive steps to maintain it in good condition. This includes:

• analysis of system performance and maintenance;
• troubleshooting problems that cause vibration and noise levels that exceed standards during operation;
• development of restoration and repair measures, etc.

Important! The company is responsible for the technical serviceability of the ventilation ducts, therefore it is obliged to carry out inspections of the systems every six months (summer and winter). Regardless of the type of air exchange organization, the maintenance of residential buildings is confirmed by an inspection report.

If a building with inefficient ventilation is a new multi-apartment building, then it is covered by a warranty (at least 5 years). It is necessary to require the developer to conduct an inspection of the ventilation system and troubleshoot problems.

If controversial situations arise in an apartment building, an independent examination is carried out. The examination allows us to identify the reasons for ineffective ventilation and non-compliance with construction and installation rules when installing ventilation shafts. Indicates a list of works to improve aeration. All proposals are documented. Recommendations are given to improve the efficiency of the system in different zones apartments and houses.