The invention provides an air treatment device (100) configured to deactivate one or more of bacteria and viruses from air, the device (100) comprising a deactivating material (121) comprising for at least 80 wt.% of one or more of a terpene and a terpenoid having no aliphatic unsaturated bond, the air treatment device (100) further comprising a gas flow generation device (130), wherein the air treatment device (100) is configured to provide said deactivating material (121) into a space with an emission rate (S) of at maximum 250 mg/h from a release area (1112).
