36" X 8" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 38 5/8" X 10 5/8"] white + Product Details Size – Ducting Components RG2016 FBA-HP Applications The C box

+ Product Details Size – 6"w X 10"h is the size for the duct opening measurement only

+ Product Details Size - 32"w X 22"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 34 5/8" width X 36 5/8" height

Designed for a 1" thick filter

Actual Filter Size – 27 3/4"w x 9 3/4" x 1"

36" X 8" Steel Return Air Filter Grille for 1" Filter Removable Frame [Outer Dimensions: 38 5 8" X 10 5 8"] white + Product Details Size – Ducting Components RG2016 FBA HP Applications The C box + Product Details Size – 6"w X 10"h is the size for the duct opening measurement only + Product Details Size 32"w X 22"h is the size for the duct opening measurement only