Commercial Grade Ozone Generator Machines The OdorFree ozone generator will oxidize unwanted odors in your facility. Ozone generators create O3, or ozone, which disburses into the space to be treated. O3 attacks odor causing substances at their source to permanently remove odors in the treatment area. Every space with odors tends to be somewhat unique. The source of the odor, as well as how deeply embedded it has become, is just as important as the actual size of the space.