System, methods and storage medium associated with generation of hydroxyl and/or reduction of ozone are disclosed. In embodiments, a system may include one or more front end sensors disposed at an input end to measure attributes of an input air stream； an hydroxyl generator/ozone reducer to receive the input air stream and use the input air stream to generate an output air stream with hydroxyl and/or reduced amount of ozone； and one or more back end sensors disposed at an output end to measure attributes of the output air stream. The system may further include a controller to control the hydroxyl generator/ozone reducer based at least in part on readings of the one or more front end sensors and the one or more back end sensors. Other embodiments may be described and/or claimed.
