24"w X 20"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 25.75"w x 21.75"h] w24h24 this diffuser is both functional

this diffuser is both functional and aesthetically pleasing

+ How To Measure A Grille Measure the size of the vent opening

16"w X 3"h Is The Size For The Duct Opening Measurement Only

actual front end outer dimensions are approximately 32 5/8" width X 8 5/8" height

actual front end outer dimensions are approximately 24 5/8" width X 20 5/8" height

24"w X 20"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 25.75"w x 21.75"h] w24h24 this diffuser is both functional+ Product Details Size 24"w X 20"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 25. 75" Width X 21. 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