28" X 36" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 30 5/8" X 38 5/8"] w12h12 + Product Details Size –

+ Product Details Size – 26"w X 16"h is the size for the duct opening measurement only

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actual front end outer dimensions are approximately 32 5/8" width X 16 5/8" height -

actual front end outer dimensions are approximately 18 5/8" width X 34 5/8" height

provides a modern look and quiet operation due to its half-inch by half-inch cube design

28" X 36" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 30 5/8" X 38 5/8"] w12h12 + Product Details Size –+ Product Details Size 28"w X 36"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 30 5 8" width X 38 5 8" height Actual Filter Size 27 3 4"w x 35 3 4" x 1" High Quality High quality solid stamped steel with counter sunk screw holes (screws included) and no sharp edges Installation Location Sidewall and ceiling Design Removable door face for easy filter change & cleaning uses a 1" thick filter.