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Air filtration and ventilation against COVID-19

Air filtration and ventilation against COVID-19

Recommendations for air filtration and ventilation against the coronavirus COVID-19

Experts from leading air conditioning and refrigeration industry associations say that the ventilation and filtration provided by air conditioning systems contribute to reduce the concentration of viruses and bacteria in indoor air and therefore, the risk of transmission of coronavirus.

Here’s how proper ventilation, a higher degree of fresh air supply, the use of the correct particulate air filters (such as HEPA filters), and rigorous maintenance are important factors to help contain the coronavirus outbreak of the containment of the coronavirus COVID-19 in closed spaces.

Relationship between COVID-19 and ventilation systems

The current health crisis highlights the importance that HVACR engineers, air conditioning service and maintenance personnel make in containing the coronavirus of the coronavirus containment covid-19 -19.

The coronavirus which causes the COVID-19 disease is mainly transmitted by contact with infected people, according to the WHO. Breathing as well as coughing and sneezing release tiny infectious droplets into the air that can contaminate surrounding surfaces and, of course, the air in the immediate environment.

These droplets, called “aerosols”, can be of various sizes. Experts assume that viruses do not occasionally fly in the air, but are always encased in droplets or attached to other particles. This raises the question of how ventilation and air conditioning systems play a role in containing epidemic diseases like COVID-19.

Maintain good indoor air quality (CAI)

Indoor air quality has become a popular topic in recent years as more and more countries shift their focus to the health and well-being of building occupants in their daily lives.

Most people in the industrialized world spend up to 90% of their time indoors. Exposure to air pollutants, such as dust, spores, bacteria, viruses, and chemical compounds have a direct influence on people’s immune systems and can cause a variety of conditions, from allergies to cancer, and even an epidemic disease like COVID-19.

Maintaining healthy indoor air quality thus becomes a general and basic need, but extremely important. While this is important at all times, it is critical in times of a broader health crisis to avoid not only the direct spread of a virus, but also to support people’s immune systems.

HEPA filters in air conditioning and its protective role

The selection of air filters depends on the application environment and must be carefully evaluated. While normal air filters are not designed to prevent the spread of viruses, they are essential to minimize risk, as viruses tend to stick to airborne particles and aerosols. Therefore, regular filters with high filtration efficiency (ePM1 filters) are crucial to reduce the risk of airborne diseases in all types of buildings.

HEPA is a type of pleated mechanical air filter. Most modern HEPA filters consist of interlaced glass fibers that twist and rotate in multiple directions to create a maze of fibers. It is an acronym for “High Efficiency Particulate Air”, translated, “High Efficiency Particulate Air Filter”. efficiency”.

This type of air filter can, in theory, remove at least 99.97% of dust, pollen, mold, bacteria and any airborne particles with a size of 0.3 microns (µm). That micron size (0.3) is known to scientists as the MPPS, or the most penetrating particle size. Scientists have found that particles of that size bypass air filters more than larger or smaller particles. Particles that are larger or smaller are trapped with even greater efficiency.

Can air conditioning be used with COVID-19 coronavirus?

It is important to highlight that air conditioning systems and equipment improve people’s quality of life, providing comfort and contributing to healthier environments. In addition to achieving the appropriate temperature and humidity, they are capable of renewing and filtering the indoor air, eliminating microparticles from the environment, thus making the air we breathe cleaner.

According to specialists, we should not do without air conditioning and ventilation systems to reduce the transmission of the virus. Quite the opposite: AC equipment filters reduce airborne particles, thereby helping to improve the quality of the air breathed indoors.

The air conditioning installations are safe and necessary to achieve optimal conditions of well-being and hygiene inside buildings, improving indoor air quality. The important thing is to guarantee its proper maintenance and cleaning.

Unconditioned spaces can cause heat stress, which can harm those who are convalescing.

For this reason, to guarantee people’s well-being, the most recommended is to maintain indoor temperature conditions between 19ºC and 21ºC during heating periods and between 24ºC and 26ºC during cooling periods, with a relative humidity of 40% -60%.

In addition, the air conditioning equipment itself can include high-efficiency air purification and filtration systems to reduce the transmission of viruses, bacteria and suspended particles, through the recirculation of air itself, commanded and monitored by the same equipment or air conditioning system. air conditioning.

Adequate ventilation of the interior spaces, independent or integrated in air conditioning systems, guarantees a permanent renewal of the air and eliminates particles suspended in it, thus reducing the risk of transmission of infectious diseases.

Correct ventilation, an ally that reduces the risk of contagion of COVID-19

The risk of contagion in buildings is significantly reduced with adequate room ventilation. The air conditioning facilities can be an ally that helps reduce the risk that an infected person who could be asymptomatic, infects other users who are in the same space, in addition to avoiding spreading the coronavirus to other areas of the building.

In many cases, it will be the facility maintainers who make these changes in the operating conditions of the facilities to make them safer. For this reason, it is advisable to carry out a general review of the air conditioning and ventilation installation before reopening the premises, where cleaning and disinfection of grilles, diffusers, filters and batteries are carried out.

If you need installation or maintenance of air conditioning systems in the entire Kissimmee, Florida area, please contact us, at AJ’s Air we can help you.