30" X 20" Steel Return Air Filter Grille for 1" Filter - Removable Frame - * Filter Included * [Outer Dimensions: 32 5/8" X 22 5/8"] with filter + Product Details Size –

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

This grille is ideal for both sidewall and ceiling installations

actual front end outer dimensions are approximately 32 5/8" width X 12 5/8" height -

Energy Efficient – Air-tight inner core decreases the pressure loss and provides a more hygienic environment - high energy efficient / No fiberglass erosion into air stream

This aluminum adjustable louvered garage vent allows air ventilation and circulation in your garage 24 hours a day

30" X 20" Steel Return Air Filter Grille for 1" Filter - Removable Frame - * Filter Included * [Outer Dimensions: 32 5/8" X 22 5/8"] with filter + Product Details Size –+ Product Details Size 30"w X 20"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 32 5 8" width X 22 5 8" height Actual Filter Size 29 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 Installation Location Sidewall and ceiling Design Removable door face for easy filter change & cleaning uses a 1" thick filter.