24" X 36" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 26 5/8" X 38 5/8"] w24h24 Measure the size of the

Measure the size of the vent opening

+ Product Details Size – 12"w X 4"h is the size for the duct opening measurement only

+ Product Details Size - 20"w X 12"h is the size for the duct opening measurement only

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+ Product Details Size – 30"w X 14"h is the size for the duct opening measurement only

24" X 36" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 26 5/8" X 38 5/8"] w24h24 Measure the size of the+ Product Details Size 24"w X 36"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 26 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 sidewall and ceiling Design removable door face for easy filter change & cleaning uses a 1" thick filter. Our filter grille latch is easy to use on