12" X 24" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged - [Outer Dimensions: 14 5/8" X 26 5/8"] w10h10 plus { display: inline-block

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if your hole is 20" wide by 14" tall

Insulation – A thick blanket of fiberglass insulation provides you with an R-Value of 8

+ Product Details Size – 12"w X 6"h is the size for the duct opening measurement only

this filter grille never rusts and withstands long-term use in any environment

12" X 24" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged - [Outer Dimensions: 14 5/8" X 26 5/8"] w10h10 plus { display: inline-block+ Product Details Size 12"w X 24"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. 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