28" X 36" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 30 5/8" X 38 5/8"] Powder-Coated + Product Details Size – Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

+ Product Details Size – 12"w X 22"h is the size for the duct opening measurement only

+ Product Details Size – 34"w X 36"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 16 5/8" width X 14 5/8" height

Heavy Gauge Steel – Heavier gauge than needed

Horizontal performance assures confident use of cooling temperature differential of 30 degrees Fahrenheit and greater

28" X 36" Steel Return Air Filter Grille for 1" Filter Removable Frame [Outer Dimensions: 30 5 8" X 38 5 8"] Powder Coated + Product Details Size – Compatible With Duct 7in Applications This sheet metal DDAG A 1212 + Product Details Size – 12"w X 22"h is the size for the duct opening measurement only + Product Details Size – 34"w X 36"h is the size for the duct opening measurement only