14"w X 34"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 15.75"w x 35.75"h] 18" Round Duct Pipe + Product Details Size –

+ Product Details Size – 14"w X 20"h is the size for the duct opening measurement only

Actual Filter Size – 21 3/4"w x 15 3/4" x 1"

Superior Airflow Control: Built-in damper lets you control how much air enters your room

and are ready to go for the next job

+ Product Details Size - 4"w X 16"h is the size for the duct opening measurement only

14"w X 34"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 15.75"w x 35.75"h] 18" Round Duct Pipe + Product Details Size –+ Product Details Size 14"w X 34"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 15. 75" Width X 35. 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