Abstract: A system for managing air quality according to the present invention includes an air processing unit, said unit including an inlet for receiving feed air from a unidirectional air passage. A treatment path housing a module is coupled to inlet for receiving, processing and passing the feed air to remove one of more contaminants. Said module includes a body and one or more UV tubes in the body for emitting UV light at an ozone production wavelength and/an ozone destruction wavelength. Feed air travels through module housed in said treatment path. An outlet is couple to said treatment path for passing the feed air to the passage at a location downstream of inlet. The pressure drop between the inlet and the outlet is less than a predetermined value.