24" X 8" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 26 5/8" X 10 5/8"] Grille + Product Details Size –

+ Product Details Size – 8"w X 18"h is the size for the duct opening measurement only

Actual Filter Size – 31 3/4"w x 35 3/4" x 1"

actual front end outer dimensions are approximately 20 5/8" width X 22 5/8" height -

or office environments

+ Product Details Perfect Fit & Easy Sizing - Designed for a 10" x 20" duct opening (measured at the opening)

24" X 8" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 26 5/8" X 10 5/8"] Grille + Product Details Size –+ Product Details Size 24"w X 8"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 23 5 8" width X 7 5 8" height High quality High quality solid stamped steel with counter sunk screw holes (screws included) and no sharp edges Design Removable door face for easy filter change & cleaning uses a 1" thick filter. Our filter grille latch is easy to use on your fingers and requires no screwdriver to