The 9700 series transfer grilles are designed to ensure visual privacy while providing air circulation from one area to another. The 9700 provides a single side mounting frame for use where appearance is an issue on only one side, as in a utility or storage closet. The 9700A provides a double sided mounting frame (with no deflectors) to fit varying door thickness (minimum 2”), where a finished look is required on both sides, as in an office or kitchen door. The 9700D is a double core configuration to give the appearance of a finished grille on both sides. The sight–proof blade configuration and unobtrusive appearance make Krueger’s 9700 series grille an ideal choice for wall or door air transfer from room to room.