14"w X 14"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - Brown [Outer Dimensions 15.75"w x 15.75"h] White actual front end outer dimensions 4 X 12 Is CRFG2028 Width_14in

actual front end outer dimensions are approximately 32 5/8" width X 20 5/8" height

Actual Filter Size – 7 3/4"w x 29 3/4" x 1"

actual front end outer dimensions are approximately 38 5/8" width X 22 5/8" height -

+ Product Details Size - 36"w X 20"h is the size for the duct opening measurement only

Actual Filter Size – 21 3/4"w x 5 3/4" x 1"

14"w X 14"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace Weather Resistant Air Grille with Screen Mesh Brown [Outer Dimensions 15.75"w x 15.75"h] White actual front end outer dimensions 4 X 12 Is CRFG2028 Width_14in actual front end outer dimensions are approximately 32 5 8" width X 20 5 8" height Actual Filter Size – 7 3 4"w x 29 3 4" x 1"