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 – 7 CRFG2028 Width_14in 4 X 12 Is

Actual Filter Size – 7 3/4"w x 27 3/4" x 1"

This grille is ideal for both sidewall and ceiling installations

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

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

+ Product Details Size – 14"w X 30"h 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 – 7 CRFG2028 Width_14in 4 X 12 Is Actual Filter Size – 7 3 4"w x 27 3 4" x 1" This grille is ideal for both sidewall and ceiling installations