Abstract: A system and accompanying methods for sanitizing indoor air is disclosed. The system may receive air from an air supply unit and analyze characteristics associated with the received air, such as by utilizing sensors of a sensor unit. Based upon the characteristics of the air, the system may direct the air along one of multiple possible pathways. In certain embodiments, the system may include determining, based on an analysis of the characteristics of the air, whether the air requires treatment and, if the air requires treatment, whether the air can be treated. Based on the analysis, the system may allow the air to pass directly into an indoor environment without treatment, activate one or more treatment modules to treat the air if the air can be treated, or activate an exhaust module to exhaust the air to another environment if the air requires treatment but cannot be treated effectively.