25" X 36" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 27 5/8" X 38 5/8"] Color_Red Oak Wood Conveniently taped together as a

Conveniently taped together as a single piece

providing efficient performance of up to 300m3/h

+ Product Details Size - 18"w X 24"h is the size for the duct opening measurement only

Design – Cubic core eggcrate design Offers highest airflow efficiency at almost 95%

actual front end outer dimensions are approximately 15

25" X 36" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 27 5/8" X 38 5/8"] Color_Red Oak Wood Conveniently taped together as a+ Product Details Size 25"w X 36"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 27 5 8" width X 38 5 8" height Actual Filter Size 24 3 4"w x 35 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.