According to "Global Air Purifiers Market By Filter Type, By End Use Sector, By Region, Competition Forecast and Opportunities, 2011 - 2021", the global air purifiers market is projected to cross $ 59 billion by 2021. As per the report, air purifiers have been segmented into six categories, namely, HEPA and Activated Carbon; HEPA, Activated Carbon and Ion & Ozone Generator; HEPA; Activated Carbon; Ion & Ozone Generator; and Electrostatic Precipitator. Among these categories, HEPA & Activated Carbon based air purifiers dominated the global air purifiers market in 2015. The segment is anticipated to maintain its dominance over the next five years as well, as HEPA filters are effective in removing dust as well as particulate matter, while activated carbon is efficient in removing foul odor. As a result, these two technologies complement each other, and provide highly efficient air purification as well as odor removal. In 2015, North America dominated the global air purifiers market, followed by Asia-Pacific, Europe, South America and Middle East & Africa.