12" X 22" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 14 5/8" X 24 5/8"] Grilles Actual Filter Size – 13 Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

Actual Filter Size – 13 3/4"w x 31 3/4" x 1"

actual front end outer dimensions are approximately 24 5/8" width X 16 5/8" height

actual front end outer dimensions are approximately 36 5/8" width X 36 5/8" height

+ Product Details Perfect Fit & Easy Sizing - Designed for a 18" x 18" duct opening (measured at the opening)

+ Product Details Size – 8" x 16" or 16" x 8" is the size for the duct opening measurement only

12" X 22" Steel Return Air Filter Grille for 1" Filter Removable Frame [Outer Dimensions: 14 5 8" X 24 5 8"] Grilles Actual Filter Size – 13 Compatible With Duct 7in Applications This sheet metal DDAG A 1212 Actual Filter Size – 13 3 4"w x 31 3 4" x 1" actual front end outer dimensions are approximately 24 5 8" width X 16 5 8" height