Europe Air Purifiers Market Forecast to 2028 - COVID-19 Impact and Global Analysis By Mechanization (HEPA, Activated Carbon, Ion and Ozone), Technology (Ionization, Adsorption, Chemisorption, Photocatalytic Oxidation, Plasma, Ozone, and Ultraviolet), Connectivity (Manual, Bluetooth, and Wi-Fi), and End User (Commercial, Residential, and Industrial)