36" X 28" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 38 5/8" X 30 5/8"] Floor Grille and scratch-resistant surface that enhances

and scratch-resistant surface that enhances the aesthetics of any room

actual front end outer dimensions are approximately 22 5/8" width X 14 5/8" height -

actual front end outer dimensions are approximately 34 5/8" width X 14 5/8" height

at predicted low air motion 35 fpm in the zone of occupancy

+ Product Spec Sheet

36" X 28" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 38 5/8" X 30 5/8"] Floor Grille and scratch-resistant surface that enhances+ Product Details Size 36"w X 28"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 37. 75" width X 29. 75" height Actual Filter Size 35 3 4"w x 27 3 4" x 1" 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