The rise in air pollution is one of the main concerns for environmentalists and chronic respiratory disease (CRD) patients. According to the Environmental Protection Agency of the U.S., the pollutant concentration in indoor air can be five times higher than in outside air, due to limited air circulation in buildings, thus resulting in the growth of airborne pollutants. Over 500 million people are affected by chronic respiratory diseases each year as a result of fossil fuel burning and poor indoor air circulation adoption rate.
The most-common CRDs are asthma, occupational lung diseases, chronic obstructive pulmonary disease (COPD), and pulmonary hypertension. Patients are always at a high risk of complications due to a rise in air pollution levels, lifestyle habits, such as tobacco smoking; occupational dust and chemical exposure, and a childhood history of frequent lower respiratory infections.
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According to CDCP, one in every twelve people suffer from asthma. Therefore, in 2021, the air purifier market stood at $11,422.7 million, and it is expected to advance at a rate of 11.8% from 2021 to 2030, to reach $31,195.6 million. These devices mitigate indoor air pollutants that lead to respiratory infections and other complications in asthma patients. Air purifiers with the high-efficiency particulate air (HEPA) technology can eliminate 99.7% of the airborne particulate matter circulating in the indoor environment.
In present times, the rising prevalence of COVID-19, with the emergence of different variants with high transferability, is making governments across the world take concrete actions to save lives. Vaccination has been effective. but there is always a risk of COVID-19 infection. Hence, a lot of people have bought air purifiers for homes and offices to shield themselves and others from the virus.
Since the virus transmits across people through nasal droplets that stay suspended in the air, the risk increases in indoor spaces with no or ineffective ventilation. The most-effective step to reduce COVID-19 risk is wearing a mask, but nobody can wear one the entire day. Thus, the installation of an air purifier can be the second line of defense against the pathogen.
Similarly, other indoor air pollutants, such as the fumes of incense, camphor, and cooking gas, may also cause respiratory diseases and asthma exacerbation. Using HEPA air purifiers can result in long-term health benefits, such as improved life expectancy and enhanced sleep quality, for asthma and other CRD patients.
This is why people around the world, especially in China, India, and other highly polluted countries, have started installing such appliances in their homes. Moreover, governments in these countries are facing increasing flak from citizens for the deteriorating air quality, especially in the Delhi–NCR region of India. The Indian capital is notorious for its bad air, with a severe AQI not uncommon anymore.
Therefore, the Delhi government has installed two massive smog towers in the city, which are essentially extra-large air purifiers, to clean up the air. Each 24-meter-high tower has 5,000 HEPA air filters and 40 large fans, which together purify 1,000 cubic meters of air each second. Moreover, INR 12.5 crore more has been directed by the Delhi High Court to be spent on another smog tower.
Thus, the growing prevalence of CRDs has resulted in an increasing demand for air purifiers to mitigate the spread of airborne particles carrying infectious agents.
