Patent ID: 8894478
Filing Date: 2014-11-25
Classification: F24F

Abstract:
1. An environmental improvement system for placement within a room bounded by a floor and a ceiling and having an open volume from the floor to the ceiling, the environmental improvement system comprising: a duct system that extends through the open volume of the room substantially from the floor of the room to the ceiling of the room; said duct system comprising a base unit at a first end of said duct system terminating proximate the floor of the room, a support unit at a second end of said duct system terminating proximate the ceiling of the room, and a duct connecting said base unit to said support unit; said base unit defining a first opening at said first end; said support unit defining a second opening at said second end; at least one reversible fan disposed in said duct system between said first opening and said second opening that draws air from the room into said duct system, through said duct, and discharges said air from said duct system, wherein the reversible fan is configured to selectively convey air in a first direction and a second direction in either a push or a pull mode; said first opening being adapted to selectively act as a first intake opening through which said air is drawn into said duct system by said fan or as a first discharge opening through which said air is discharged from said duct system; and said second opening being adapted to selectively act as a second intake opening through which said air is drawn into said duct system by said fan or as a second discharge opening through which said air is discharged from said duct system, wherein a first protective screen is disposed in said duct system proximate said first opening and between said duct and said open volume of said room, and wherein a second protective screen is disposed in said duct system proximate said second opening and between said duct and said open volume of said room, at least one of the first protective screen and the second protective screen incorporating a fragrance.