20" X 10" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 22 5/8" X 12 5/8"] flat stamped steel + Product Details Size – 4 X 12 Is CRFG2028 Width_14in

+ Product Details Size – 36"w X 20"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 22 5/8" width X 38 5/8" height -

+ Product Details Size - 20"w X 2"h is the size for the duct opening measurement only

reducing energy costs and maximizing HVAC system lifespan

+ Product Spec Sheet Floor Register Spec Sheet

20" X 10" Steel Return Air Filter Grille for 1" Filter Removable Frame [Outer Dimensions: 22 5 8" X 12 5 8"] flat stamped steel + Product Details Size – 4 X 12 Is CRFG2028 Width_14in + Product Details Size – 36"w X 20"h is the size for the duct opening measurement only actual front end outer dimensions are approximately 22 5 8" width X 38 5 8" height