24" X 18" Steel Return Air Filter Grille for 1" Filter - Removable Frame - * Filter Included * [Outer Dimensions: 26 5/8" X 20 5/8"] w16h16 + Product Details Size – 4 X 12 Is CRFG2028 Width_14in
Yard notes & kiln story
Description
+ Product Details Size – 28"w X 30"h is the size for the duct opening measurement only
875" width X 14" height
+ Product Details Size - 28"w X 20"h is the size for the duct opening measurement only
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providing the flexibility to match specific ventilation requirements or personal comfort levels
24" X 18" Steel Return Air Filter Grille for 1" Filter Removable Frame * Filter Included * [Outer Dimensions: 26 5 8" X 20 5 8"] w16h16 + Product Details Size – 4 X 12 Is CRFG2028 Width_14in + Product Details Size – 28"w X 30"h is the size for the duct opening measurement only 875" width X 14" height