14" x 28" or 28" x 14" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Color_White + Product Details Size – Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

+ Product Details Size – 34"w X 32"h is the size for the duct opening measurement only

Actual Filter Size – 17 3/4"w x 15 3/4" x 1"

Width vs Height

+ Product Details Perfect Fit & Easy Sizing - Designed for a 16" x 25" OR 25" X 16" duct opening (measured at the opening)

+ Product Spec Sheet Round Ceiling Diffuser Spec Sheet

14" x 28" or 28" x 14" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Color_White + Product Details Size – Compatible With Duct 7in Applications This sheet metal DDAG A 1212 + Product Details Size – 34"w X 32"h is the size for the duct opening measurement only Actual Filter Size – 17 3 4"w x 15 3 4" x 1"