22"w X 30"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 23.75"w x 31.75"h] Fixed Blades + Product Details Size - 4 X 12 Is CRFG2028 Width_14in

+ Product Details Size - 14"w X 25"h is the size for the duct opening measurement only

Actual Filter Size – 33 3/4"w x 33 3/4" x 1"

+ Product Details Size – 22" x 30" or 30" x 22" is the size for the duct opening measurement only

+ Product Details Size – 20" x 22" or 22" x 20" is the size for the duct opening measurement only

75"H – fits a 12" X 8" duct opening

22"w X 30"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace Weather Resistant Air Grille with Screen Mesh [Outer Dimensions 23.75"w x 31.75"h] Fixed Blades + Product Details Size 4 X 12 Is CRFG2028 Width_14in + Product Details Size 14"w X 25"h is the size for the duct opening measurement only Actual Filter Size – 33 3 4"w x 33 3 4" x 1"