HEPA filters: Key to cleaner indoor air and better respiratory health
Siddhartha Jana
Air purifiers have become increasingly important in northern India as air quality has deteriorated, particularly in Delhi, where it has reached hazardous levels.
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Sales of air purifiers increased by 50% over the holiday season, as consumers sought solutions to pollution-induced respiratory problems.
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Air purifiers use HEPA filters to remove pollutants and allergens, trapping particles as small as 0.1 µm and improving indoor air quality.
Source: Canva
Air purifiers are especially useful for people with respiratory disorders such as COPD, but they provide little help to healthy people in heavily polluted environments.
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Air purifiers must have regular maintenance, including filter replacement, to be functional, and misuse can contaminate indoor air.
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HEPA filters are effective at catching tiny particles and are especially suggested for persons who have allergies or respiratory disorders, although they may need to be replaced more frequently.
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Air purifiers can be expensive, with models ranging from Rs 10,000 to Rs 60,000, and frequent filter changes increase the cost.
Source: Canva
In places where access to branded air purifiers is limited, alternative, affordable options like do-it-yourself air purifiers like Corsi-Rosenthal boxes could increase access to clean air.