20"w X 24"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 21.75"w x 25.75"h] Ceiling + Product Details Size - 4" Round Duct Pipe Product Details Size The SHEASC10W1-HP

+ Product Details Size - 16"w X 12"h is the size for the duct opening measurement only

Actual Filter Size – 35 3/4"w x 33 3/4" x 1"

+ Product Details Perfect Fit & Easy Sizing - Designed for a 32" x 36" Or 36" x 32" duct opening (measured at the opening)

actual front end outer dimensions are approximately 36 5/8" width X 14 5/8" height

ensuring it arrives at your home in perfect condition

20"w X 24"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace Weather Resistant Air Grille with Screen Mesh [Outer Dimensions 21.75"w x 25.75"h] Ceiling + Product Details Size 4" Round Duct Pipe Product Details Size The SHEASC10W1 HP + Product Details Size 16"w X 12"h is the size for the duct opening measurement only Actual Filter Size – 35 3 4"w x 33 3 4" x 1"