30" x 32" or 32" x 30" Cube Core Eggcrate Return Air Grille Return Grille actual front end outer dimensions AD-S-230-10x10 Actual Filter Size 25 Width_8in

actual front end outer dimensions are approximately 34 5/8" width X 30 5/8" height

+ Product Details Size – 26" x 30" or 30" x 26" is the size for the duct opening measurement only

+ Product Spec Sheet Lay-In 3 Coned Spec Sheet

Design – These Supply Diffusers with integral round necks are recommended for heating

Actual Filter Size – 29 3/4"w x 15 3/4" x 1"

30" x 32" or 32" x 30" Cube Core Eggcrate Return Air Grille Return Grille actual front end outer dimensions AD S 230 10x10 Actual Filter Size 25 Width_8in actual front end outer dimensions are approximately 34 5 8" width X 30 5 8" height + Product Details Size – 26" x 30" or 30" x 26" is the size for the duct opening measurement only