Net4CleanAir will join world-leading experts covering the main disciplines in air cleaning research and innovation which will be a unique opportunity to pave the way for progress beyond the state of the art, namely for future development of standards and regulations, and decision-making systems for indoor air cleaning technologies. Net4CleanAir will promote high-level and multidisciplinary training, along with scientific and societal dissemination to engage citizens at the centre of indoor air cleaning.