Abstract: An environmental improvement system for placement within a room bounded by a floor and a ceiling is provided herein. In one embodiment, the system comprises a duct system that extends through the open volume of the room from the floor to the ceiling. The duct system comprises a base unit at a first end terminating proximate the floor, a support unit at a second end terminating proximate the ceiling, and a duct connecting the base and support units. The base unit defines a first opening, and the support unit defines a second opening. At least one fan is disposed between the first and second openings and draws air from the room into and through the system and discharges the air from the system. The first and second openings are each adapted to selectively act as an intake opening or as a discharge opening.