28" X 10" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 30 5/8" X 12 5/8"] Fixed Blades with Damper our grill boasts an impressive

our grill boasts an impressive 96% airflow capacity

actual front end outer dimensions are approximately 28 5/8" width X 26 5/8" height

+ Product Details Size – 34"w X 36"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 16 5/8" width X 28 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

28" X 10" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 30 5/8" X 12 5/8"] Fixed Blades with Damper our grill boasts an impressive+ Product Details Size 28"w X 10"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 30 5 8" width X 12 5 8" height Actual Filter Size 27 3 4"w x 9 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. Our