Air Purification Market By Product (Vehicle exhaust, Mist eliminators, Fire/Emergency exhaust, Dust collectors, Fume & smoke collectors, Others (air cleaners, industrial UV systems, and commercial kitchen ventilation systems)), Technology (Electrostatic precipitator, Activated carbon, Ionic filters, HEPA, Others (ultraviolet light air filters and ozone generators)), Industry Trends, Estimation & Forecast, 2017 - 2025