25" X 25" Steel Return Air Filter Grille for 1" Filter - Removable Frame - Black - [Outer Dimensions: 27 5/8" X 27 5/8"] Fixed Blades with Damper 875" width X 25

875" width X 25

rated at R3

providing efficient performance of up to 300m3/h

and its seamless drop-in installation process ensures effortless setup

actual front end outer dimensions are approximately 22 5/8" width X 20 5/8" height -

25" X 25" Steel Return Air Filter Grille for 1" Filter - Removable Frame - Black - [Outer Dimensions: 27 5/8" X 27 5/8"] Fixed Blades with Damper 875" width X 25+ Product Details Size 25"w X 25"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 27 5 8" width X 27 5 8" height Actual Filter Size 24 3 4"w x 24 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.