12" X 36" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged - [Outer Dimensions: 14 5/8" X 38 5/8"] w25h25 4" X 12" Is The

4" X 12" Is The Size For The Duct Opening (floor/vent hole) Measurement Only

If your hole is 14" wide by 20" tall

with actual outer dimensions of 22

+ Product Details Size – 8"w X 6"h is the size for the duct opening measurement only

12" X 36" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged - [Outer Dimensions: 14 5/8" X 38 5/8"] w25h25 4" X 12" Is The+ Product Details Size 12"w X 36"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 14 5 8" width X 38 5 8" height. High Quality high quality solid stamped steel with counter sunk screw holes (screws included) and no sharp edges Installation Location Ceiling Design Fixed hinged for easy filter change & cleaning uses a 1" thick filter. Our filter grille latch is easy to use on your fingers and