20"w X 20"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 21.75"w x 21.75"h] Color_White actual front end outer dimensions Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

actual front end outer dimensions are approximately 26 5/8" width X 38 5/8" height

All of these grills have dampers

+ Product Details Size - 6"w X 28"h is the size for the duct opening measurement only

+ Product Details Size – 29"w X 22"h is the size for the duct opening measurement only

Actual Filter Size – 24 3/4"w x 9 3/4" x 1"

20"w X 20"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace Weather Resistant Air Grille with Screen Mesh [Outer Dimensions 21.75"w x 21.75"h] Color_White actual front end outer dimensions Compatible With Duct 7in Applications This sheet metal DDAG A 1212 actual front end outer dimensions are approximately 26 5 8" width X 38 5 8" height All of these grills have dampers