22"w X 28"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 23.75"w x 29.75"h] w12h12 + Product Details Size –

+ Product Details Size – 16"w X 12"h is the size for the duct opening measurement only

Actual Filter Size – 7 3/4"w x 33 3/4" x 1"

Measure the size of the air duct/drywall opening

+ Product Details Perfect Fit & Easy Sizing - Designed for a 30" x 8" OR 8" x 30" duct opening (measured at the opening)

75" width X 13

22"w X 28"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 23.75"w x 29.75"h] w12h12 + Product Details Size –+ Product Details Size 22"w X 28"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 23. 75" Width X 29. 75" Height Weather and Pest Proof These louvers are especially designed to prevent water from entering your home, and with a built in back 1 2" mesh they also protect you from annoying rodents like mice, rats, birds, and squirrels High Quality Aluminum The premium durable aluminum will never rust and it will never