6"w X 28"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 7.75"w x 29.75"h] Fixed Blades Actual Filter Size – 13

Actual Filter Size – 13 3/4"w x 15 3/4" x 1"

Width vs Height:

Ideal for Walls & Ceilings: Designed for seamless installation in standard 16" X 12" duct openings

actual front end outer dimensions are approximately 10 5/8" width X 12 5/8" height

+ Product Details Perfect Fit & Easy Sizing - Designed for a 34" x 22" Or 22" x 34" duct opening (measured at the opening)

6"w X 28"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 7.75"w x 29.75"h] Fixed Blades Actual Filter Size – 13+ Product Details Size 6"w X 28"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 7. 75" Width X 29. 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 wear