14" X 25" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged - [Outer Dimensions: 16 5/8" X 27 5/8"] 8in diameter + Product Details Size -

+ Product Details Size - 36"w X 18"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 14 5/8" width X 26 5/8" height

Complies with industry standards of USA: ASTM D-882

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

14" X 25" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged - [Outer Dimensions: 16 5/8" X 27 5/8"] 8in diameter + Product Details Size -+ Product Details Size 14"w X 25"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 16 5 8" width X 27 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