28" X 20" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 30 5/8" X 22 5/8"] w34h34 The design eliminates noise and

The design eliminates noise and prevents louvers from vibrating

With plain ends

actual front end outer dimensions are approximately 30 5/8" width X 12 5/8" height

+ Product Details Size – 28"w X 18"h is the size for the duct opening measurement only

28" X 20" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 30 5/8" X 22 5/8"] w34h34 The design eliminates noise and+ Product Details Size 28"w X 20"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 30 5 8" width X 22 5 8" height Actual Filter Size 27 3 4"w x 19 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