30"w X 28"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 31.75"w x 29.75"h] return filter + Product Details Size – Product Description Enhance your CRFG68 Victorian Floor Registers

+ Product Details Size – 24"w X 22"h is the size for the duct opening measurement only

+ Product Details Size - 28"w X 30"h is the size for the duct opening measurement only

Actual Filter Size – 13 3/4"w x 19 3/4" x 1"

With its reliable construction and sleek design

+ Product Details Size – 28" x 36" or 36" x 28" is the size for the duct opening measurement only

30"w X 28"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace Weather Resistant Air Grille with Screen Mesh [Outer Dimensions 31.75"w x 29.75"h] return filter + Product Details Size – Product Description Enhance your CRFG68 Victorian Floor Registers + Product Details Size – 24"w X 22"h is the size for the duct opening measurement only + Product Details Size 28"w X 30"h is the size for the duct opening measurement only