Cleaning ventilation ducts

  • The performance and sanitary indicators of ventilation equipment determine the quality of air and the speed of its circulation in the room. Correct functioning of this engineering network is one of the prerequisites for maintaining a comfortable temperature and humidity regime. A malfunction of the ventilation system causes the formation of mold and mildew, the appearance of unpleasant odors, dust, harmful substances in the air. This microclimate can cause allergic reactions, headaches, malaise, fatigue and chronic illness in people who are often indoors. The presence of microorganisms and pathogenic microflora in the air adversely affects the level of performance of office workers, often leads to problems with the respiratory system, shortness of breath and other serious diseases.

    Periodic nj air duct cleaning , preventive measures in order to ensure high sanitary indicators and efficient ventilation are the responsibility of the employer. The event is necessary to solve the following tasks: maintaining optimal temperature and humidity conditions; preventing unpleasant odors in the room; maintaining the required level of air circulation; reducing the likelihood of the spread of pathogenic flora, bacteria, viruses, fungus inside the building; provided that the equipment is properly designed, ventilation prevents smoke and the spread of fire during a fire; quick removal of extraneous odors from the room: tobacco, food, burning, chemicals; maintaining the operability of climatic equipment and forced exhaust system, increasing its service life due to the low wear rate; reduction of expenses for renovation of premises, the need for which arises due to high humidity and the appearance of mold; maintaining the microclimate parameters in accordance with legal requirements.

    It is difficult to overestimate the role of ventilation and air conditioning equipment, hoods in ensuring the normal functioning of the building. The level of comfort, as well as the safety of people who work in the office, at enterprises, depends on the condition and quality of the equipment.

    The need to clean the air ducts

    It is possible to assess the need for cleaning the air ducts only after a professional inspection. For this, specialists use video inspection. The camera, fixed on a flexible cable, is inserted into the ventilation system, and the image is broadcast to a remote display. The operator slowly moves the camera along the duct, inspecting each area and fixing the most problematic areas. The flexible hose on which the camera is fixed easily overcomes obstacles and penetrates into remote and hard-to-reach corners.

    Signs of contamination

    The ventilation and air conditioning equipment must be checked at least once every 6 months. A number of signs will indicate the need for unscheduled maintenance of the system: Visible contamination of the inner and outer surfaces of the air duct: dirt, dust, fat and oil deposits, fungus, mold, large debris. Bad smell from their ventilation duct. Unsatisfactory results of laboratory analysis of a sample taken from the surface of the equipment. Indoor air microclimate indicators do not correspond to permissible parameters. Insufficient air circulation, high humidity, the formation of fungus and mold on the walls and canvas.

    Frequency of cleaning

    The frequency of cleaning the duct should be determined individually, taking into account the characteristics and purpose of the object. For example, in catering establishments, it must be carried out much more often than in office premises, due to the rapid accumulation of fatty deposits on the inner surface of the ventilation. A similar situation will be typical for industrial facilities, where wood dust, construction waste is formed during the technological process, and various chemicals are released.

    Another criterion that will help to assess the need for cleaning the duct is the microclimate indicators for a building for a specific purpose. Regulatory requirements can be found in industry SanPiN. If the results of measuring humidity and air velocity, dust and chemical substances concentration showed unsatisfactory values, you should pay more attention to the condition of the hood and ventilation equipment. Often the cause of an uncomfortable microclimate is air duct pollution. After servicing the ventilation, it is necessary to make repeated measurements. High-quality cleaning should restore the microclimate parameters to standardized values.

    Typical and specific types of air duct pollutants

    What is the threat of contamination of the air duct of the ventilation network? Dust accumulated on the inner walls of the equipment significantly reduces the fire safety of the facility. Grease, cobwebs, and other debris can quickly spread fire throughout the building. The narrowing of the inner opening of the channel leads to a significant decrease in air exchange. The high load on the motor and other functional units causes accelerated wear of the equipment. The small accumulation of debris allows new dust and dirt particles to settle more quickly. Uncomfortable microclimate with temperature and humidity that do not comply with SanPiN standards. The spread of pathogenic microorganisms indoors increases the likelihood of developing various diseases. The appearance of fungus and mold on the walls and canvas.

    Types of air duct pollutants differ in chemical properties, state of aggregation, reasons for their appearance. Deposits on the inner walls of the ventilation system are usually formed from dust and dirt particles, grease, pathogenic flora, mold, rust. Specific types of pollution are typical for industrial enterprises. Example: wood or concrete dust, various chemicals, water deposits, ash, lime deposits and other components that are used and formed during the technological process.

    A separate type of pollution that is difficult to remove appears after a flood or fire. The products formed during combustion must be quickly removed from the room. An increased concentration of substances can cause poisoning and death of a person. To ensure the safety of people during a fire, the ventilation system must be properly designed and installed, function efficiently, and undergo regular maintenance. The flood causes high humidity in the room and the accumulation of condensation on the walls of the duct. If the problem is not eliminated in time, fungal colonies begin to multiply rapidly on the elements of the ventilation network, which quickly appear in the office and living rooms.

    Methods for cleaning ventilation ducts, design of professional equipment

    The design of the ventilation system is characterized by a long duct length, often has many bends and hard-to-reach areas. For its high-quality cleaning, special equipment is required, which consists of four key elements: a long shaft; removable nozzle for mechanical removal of dirt; a camera with a robust body, resistant to mechanical stress, moisture, chemical reagents; remote control for the installation.

    A video camera transmitting data to a remote display is an important and integral part of the installation. Without it, it is impossible to ensure control and high quality of the result. With its help, the operator monitors the progress of the process, adjusts the intensity of cleaning taking into account the degree of contamination, directs the device into hard-to-reach areas.

    There are four ventilation duct cleaning technologies:

    Mechanical method. Suitable for cleaning straight vertical channels and removing light impurities (dust, sand, stones, cobwebs, feathers, excrement from birds, rats, mice, insects). The main tool is a cable with a metal nozzle or a device consisting of a cleaning nozzle and a vacuum cleaner that absorbs debris. The mechanical method refers to dry cleaning methods and does not involve the use of chemical solutions.

    Chemical method. This is a foam cleaning that copes well with grease stains. Main area of ‚Äč‚Äčapplication: catering establishments. To clean the air duct, aggressive alkaline compounds with disinfecting and cleaning characteristics are used.

    Combined approach. Elimination of fatty and hard deposits using mechanical action and chemical foam.

    Cryogenic blasting is a new chemical method for cleaning contaminants. Differs in high efficiency and gentle action. To remove deposits, dry ice is used, which, after contact with the inner walls of the air duct, produces a microexplosion. Its strength is sufficient to clean the surface from deposits.

    How to clean air ducts depends on the nature and type of ventilation contaminant. For example, in laboratories, chemical reagents are often deposited on the inner surface of the channel, which are used for research and analysis. It is impossible to neutralize them using a standard method. To eliminate chemical deposits, it is necessary to find out the composition and select a solution that is capable of breaking them down.

1 comment
  • ivanratnitski
    August 23, 2021