32"w X 16"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 33.75"w x 17.75"h] w32h32 and lay it flat in

and lay it flat in the grid

For 6" duct opening

Actual Filter Size – 13 3/4"w x 17 3/4" x 1"

Actual Filter Size – 17 3/4"w x 11 3/4" x 1"

32"w X 16"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 33.75"w x 17.75"h] w32h32 and lay it flat in+ Product Details Size 32"w X 16"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 33. 75" Width X 17. 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