22"w X 26"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 23.75"w x 27.75"h] Material_Aluminum + Product Details Size -

+ Product Details Size - 20"w X 32"h is the size for the duct opening measurement only

3 * insulation density is 30kgs/cbm = 0

Design – Easy unrestricted airflow for your HVAC system - 50° angled to provide maximum airflow

+ Product Details Perfect Fit & Easy Sizing - Designed for a 30" x 20" OR 20" x 30" duct opening (measured at the opening)

Actual Filter Size – 13 3/4"w x 31 3/4" x 1"

22"w X 26"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 23.75"w x 27.75"h] Material_Aluminum + Product Details Size -+ Product Details Size 22"w X 26"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 23. 75" Width X 27. 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