36"w X 10"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 37.75"w x 11.75"h] sidewall actual front end outer dimensions Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

actual front end outer dimensions are approximately 26 5/8" width X 38 5/8" height

+ Product Details Perfect Fit & Easy Sizing - Designed for a 32" x 24" OR 24" x 32" duct opening (measured at the opening)

+ Product Details Size – 25"w X 16"h is the size for the duct opening measurement only

Actual Filter Size – 33 3/4"w x 13 3/4" x 1"

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36"w X 10"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace Weather Resistant Air Grille with Screen Mesh [Outer Dimensions 37.75"w x 11.75"h] sidewall actual front end outer dimensions Compatible With Duct 7in Applications This sheet metal DDAG A 1212 actual front end outer dimensions are approximately 26 5 8" width X 38 5 8" height + Product Details Perfect Fit & Easy Sizing Designed for a 32" x 24" OR 24" x 32" duct opening (measured at the opening)