How do biological aerosols affect indoor air quality?


Biological pollutants, known as bioaerosols, consist of various microorganisms and particles that can harm human health. These pollutants, including bacteria, viruses, mold, fungi, insects, pollen, and pet dander, are released from the environment and can travel through the air and settle on surfaces. When present indoors, bioaerosols contribute to poor air quality, leading to allergies, asthma attacks, and respiratory discomfort.  In this article, we will explore the impact of biological pollutants on air quality and discuss the role of air purifiers in improving indoor environments.

Understanding Biological Pollutants:

Biological pollutants are small particles such as dander, skin flakes, microorganisms, and their by-products that can be easily inhaled and harm human health. Sources of biological pollutants include bacteria, viruses, household pets, mould, pests and insects, and pollen. These pollutants can transform into bioaerosols that circulate in the air, even in seemingly well-ventilated spaces. While cleaning products may target visible dirt, they often fail to remove airborne contaminants, allowing harmful particles to persist.

Health Effects of Biological Contamination:

Exposure to biological pollutants can result in a range of health issues, from minor irritations to serious diseases. These pollutants can cause acute toxic effects, allergies (such as hay fever), asthma, cancer, cystic fibrosis aggravation, diseases from animal feces, hypersensitivity pneumonitis, infectious diseases, neurological effects, and undiagnosed illnesses. Even pets can experience allergies and reactions to airborne pollutants, highlighting the need for better indoor air quality.

Impact on Air Quality:

Indoor spaces are susceptible to biological contamination due to the presence of plants, pets, and people. Pollutants released by these sources can become airborne, leading to decreased air quality. Mould also poses a significant threat as it spreads through spores in the air, causing respiratory problems. Without proper ventilation, indoor air pollutants can become trapped, resulting in consistently low air quality.  

Regular ventilation of houses and offices is helpful in some situations and when the weather permits. In some parts of the world, opening windows and doors to help ventilate indoor spaces simply opens them up to additional problems such as pollen and air pollution. One of the best solutions is to purify indoor air with a technology that actively works to identify, capture, and remove toxic pollutants and allergens circulating in residential and office spaces.

Improving Indoor Air Quality with Air Purifiers:

Traditionally, indoor pollution has been addressed through targeted approaches like pest control or medication for respiratory conditions. However, it is now understood that maintaining good indoor air quality requires a multi-faceted approach. Air purifiers are a highly effective solution for bringing clean air into homes, schools, workplaces, and hospitals. These devices actively identify, capture, and remove harmful pollutants and allergens circulating indoors.

Effectiveness of Air Purifiers:

Air purification devices effectively remove unwanted airborne particles, improving air quality. Filtration-based purifiers can remove up to 99.97% of particles as small as 0.3 microns. However, many viruses and bacteria are smaller, limiting the effectiveness of filter-based solutions. Purifiers that use hydrogen peroxide, like Tadiran's AIROW 3™, have shown significant reduction of harmful pathogens. Tests demonstrated reductions of COVID-19 virus molecules by 99.93% and other pathogens by over 99.99% in controlled environments.

Considerations for Choosing an Air Purifier:

When selecting an air purifier, it is essential to consider maintenance requirements and coverage area. Some systems require regular maintenance to ensure continued effectiveness. Passive purifiers may not reach all areas of indoor spaces, while active purifiers should cover a reasonably large area to be efficient. Tadiran's AIROW 3™ is a proactive, non-invasive air purification device that covers large areas and has demonstrated remarkable effectiveness in reducing bioaerosols.


Indoor air quality plays a vital role in our health and well-being. Biological pollutants can significantly impact air quality and lead to various health issues. Air purifiers offer an effective solution for improving indoor environments by actively removing harmful pathogens and allergens from the air and contributing to creating safe and healthy indoor spaces. As the understanding of air pollution and its impact grows, proactive air purification technology, like Tadiran's AIROW 3™, continues to advance and provide cleaner air for everyone.

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