10" X 6" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged - [Outer Dimensions: 12 5/8" X 8 5/8"] Ceiling + Product Details Size - 4 X 12 Is CRFG2028 Width_14in

+ Product Details Size - 28"w X 26"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 18 5/8" width X 38 5/8" height -

875" width X 13

+ Product Details Perfect Fit & Easy Sizing - Designed for a 14" x 24" OR 24" X 14" duct opening (measured at the opening)

we have assisted countless contractors

10" X 6" Steel Return Air Filter Grille for 1" Filter Fixed Hinged [Outer Dimensions: 12 5 8" X 8 5 8"] Ceiling + Product Details Size 4 X 12 Is CRFG2028 Width_14in + Product Details Size 28"w X 26"h is the size for the duct opening measurement only actual front end outer dimensions are approximately 18 5 8" width X 38 5 8" height