36"w X 22"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 37.75"w x 23.75"h] flat stamped steel actual front end outer dimensions

actual front end outer dimensions are 19" Width X 13" Height

+ Product Details Perfect Fit & Easy Sizing - Designed for a 28" x 20" OR 20" x 28" duct opening (measured at the opening)

Actual Filter Size – 29 3/4"w x 17 3/4" x 1"

75" width X 3

Ideal for Walls & Ceilings: Designed for seamless installation in standard 14" X 8" duct openings

36"w X 22"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 37.75"w x 23.75"h] flat stamped steel actual front end outer dimensions+ Product Details Size 36"w X 22"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 37. 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