The present invention overcomes many of the shortcomings of the prior art by providing an air vent deflector insert that may be positioned adjacent an air vent that is already installed in a suspended ceiling grid. It is for use with a ceiling grid of the type having a plurality of grid members intersecting so as to form a generally rectangular opening. The opening may be said to have a predetermined length and a predetermined width. Each of the grid members forming the opening has an upper surface for supporting the air vent. The air vent has a generally rectangular perimeter edge with a lower surface that rests on the upper surfaces of the grid members defining the generally rectangular opening. The air deflector has a deflector body with four side members. Each of the side members has a pair of opposed ends and a mid-portion therebetween. The ends of each side member are joined to an end of another side member such that the four members form a generally rectangular assembly. Each side member includes a downwardly extending wall segment having a lower edge and an upper edge. The upper edges of the wall segments together define a rectangular perimeter with a length approximately equal to the predetermined length of the rectangular opening and a width approximately equal to the predetermined width of the rectangular opening. At least two of the side members further include a support tab extending outwardly from the upper edge of the downwardly extending wall segment. The supports tabs are designed to be received between the upper surfaces of the grid members defined in the rectangular opening and the lower surface of the perimeter edge of the air vent such that the deflector body is retained adjacent the rectangular opening. The deflector body is formed of a resilient material such that the deflector body may be deformed into a non-rectangular shape and the support tabs may be positioned between the upper surfaces of the grid members defining the rectangular opening and the lower surface of the perimeter edge of the air vent without disassembling the deflector body or removing the air vent from the rectangular opening.
FIG. 4 is a perspective view of the air deflector of FIG. 2, with the deflector being deformed into a non-rectangular shape such that it can be installed on the air vent without disassembly of the air vent or deflector.