Flush With Frame

Duct Opening Overall Dimensions
Flush With 90° Corners Flush With 45° Corners
2-1/2 x 10 4-1/2 x 11-13/16 5 x 11-13/16
2-1/2 x 12 4-1/2 x 14-1/8 5 x 14-1/8
2-1/2 x 14 4-1/2 x 16 5 x 16
4 x 8 6-3/4 x 10-1/4 6-3/4 x 10-1/4
4 x 10 6-3/4 x 12-1/4 6-3/4 x 12-1/4
4 x 12 6-3/4 x 14-1/2 6-3/4 x 14-1/2
4 x 14 6-3/4 x 16-1/2 6-3/4 x 16-1/2
6 x 10 9 x 12-1/4 9 x 12-1/4
6 x 12 9 x 14-1/2 9 x 14-1/2
6 x 14 9 x 16-1/2 9 x 16-1/2

Flush No Frame

Duct Opening Overall Dimensions
Flush No Frame
2-1/2 x 10 4-1/2 x 12
2-1/2 x 12 4-1/2 x 14
2-1/2 x 14 4-1/2 x 16
4 x 8 6 x 10
4 x 10 6 x 12
4 x 12 6 x 14
4 x 14 6 x 16
6 x 10 8 x 12
6 x 12 8 x 14
6 x 14 8 x 16

Insert

Duct Opening Overall Dimensions
Insert
2-1/2 x 10 2-1/2 x 10
2-1/2 x 12 2-1/2 x 12
2-1/2 x 14 2-1/2 x 14
4 x 8 4 x 8
4 x 10 4 x 10
4 x 12 4 x 12
4 x 14 4 x 14
6 x 10 6 x 10
6 x 12 6 x 12
6 x 14 6 x 14