22" x 28" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 18in diameter actual front end outer dimensions 4 X 12 Is CRFG2028 Width_14in

actual front end outer dimensions are approximately 18 5/8" width X 32 5/8" height -

+ Product Details Size – 24"w X 10"h is the size for the duct opening measurement only

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+ Product Details Size - 18"w X 16"h is the size for the duct opening measurement only

Ideal for Walls & Ceilings: Designed for seamless installation in standard 10" X 10" duct openings

22" x 28" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 18in diameter actual front end outer dimensions 4 X 12 Is CRFG2028 Width_14in actual front end outer dimensions are approximately 18 5 8" width X 32 5 8" height + Product Details Size – 24"w X 10"h is the size for the duct opening measurement only