6"w X 26"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 7.75"w x 27.75"h] Grille + Product Details Size - 4" Round Duct Pipe Product Details Size The SHEASC10W1-HP

+ Product Details Size - The listed 6" diameter refers specifically to the size of the duct opening

ceiling height)

+ Product Details Size - 18"w X 16"h X 2"d (for duct opening measurement only)

actual front end outer dimensions are approximately 22 5/8" width X 30 5/8" height

+ Product Details Size – 25"w X 32"h is the size for the duct opening measurement only

6"w X 26"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace Weather Resistant Air Grille with Screen Mesh [Outer Dimensions 7.75"w x 27.75"h] Grille + Product Details Size 4" Round Duct Pipe Product Details Size The SHEASC10W1 HP + Product Details Size The listed 6" diameter refers specifically to the size of the duct opening ceiling height)