14" X 25" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 16 5/8" X 27 5/8"] 18in diameter + Product Details Size – Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

+ Product Details Size – 25"w X 28"h is the size for the duct opening measurement only

+ Product Details Size - 14"w X 22"h is the size for the duct opening measurement only

R value rating of insulation - r3

+ Product Details Size – 14"w X 36"h is the size for the duct opening measurement only

including Ductless Mini-Split

14" X 25" Steel Return Air Filter Grille for 1" Filter Removable Frame [Outer Dimensions: 16 5 8" X 27 5 8"] 18in diameter + Product Details Size – Compatible With Duct 7in Applications This sheet metal DDAG A 1212 + Product Details Size – 25"w X 28"h is the size for the duct opening measurement only + Product Details Size 14"w X 22"h is the size for the duct opening measurement only