28"w X 22"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 29.75"w x 23.75"h] Aluminum Actual Filter Size – 23

Actual Filter Size – 23 3/4"w x 15 3/4" x 1"

actual front end outer dimensions are approximately 20 5/8" width X 14 5/8" height

actual front end outer dimensions are approximately 24 5/8" width X 28 5/8" height

Ideal for Walls & Ceilings: Designed for seamless installation in standard 20" X 10" duct openings

actual front end outer dimensions are approximately 27 5/8" width X 34 5/8" height -

28"w X 22"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 29.75"w x 23.75"h] Aluminum Actual Filter Size – 23+ Product Details Size 28"w X 22"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 29. 75" Width X 23. 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