Air filters are essential components designed to maintain indoor air quality (IAQ) and protect HVAC systems by removing particulate and gaseous contaminants. Based on filtration mechanisms and media, they are generally classified into particulate filters (such as HEPA and ULPA filters for fine dust and pathogens), gaseous filters (like activated carbon filters for odor and VOC removal), and hybrid filters that combine both. They are widely applied across residential, commercial buildings, industrial manufacturing, and healthcare facilities to ensure safety and compliance with air quality standards.
