8" X 22" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 10 5/8" X 24 5/8"] return grille + Product Details Size – d Product Details Size The 170B 16X16 FBA

+ Product Details Size – 14"w X 36"h is the size for the duct opening measurement only

+ Product Details Size - 26"w X 24"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 12 5/8" width X 10 5/8" height

with actual outer dimensions of 12

actual front end outer dimensions are approximately 24 5/8" width X 31 5/8" height

8" X 22" Steel Return Air Filter Grille for 1" Filter Removable Frame [Outer Dimensions: 10 5 8" X 24 5 8"] return grille + Product Details Size – d Product Details Size The 170B 16X16 FBA + Product Details Size – 14"w X 36"h is the size for the duct opening measurement only + Product Details Size 26"w X 24"h is the size for the duct opening measurement only