16" X 30" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged - [Outer Dimensions: 18 5/8" X 32 5/8"] Color_White actual front end outer dimensions 4 X 12 Is CRFG2028 Width_14in

actual front end outer dimensions are approximately 32 5/8" width X 20 5/8" height

+ Product Details Size – 20"w X 30"h is the size for the duct opening measurement only

Operating temperature from -40°f to +248°f [-40°c to +120°c]

+ Product Details Size – 10" x 24" or 24" x 10" is the size for the duct opening measurement only

actual front end outer dimensions are approximately 2" wider

16" X 30" Steel Return Air Filter Grille for 1" Filter Fixed Hinged [Outer Dimensions: 18 5 8" X 32 5 8"] Color_White actual front end outer dimensions 4 X 12 Is CRFG2028 Width_14in actual front end outer dimensions are approximately 32 5 8" width X 20 5 8" height + Product Details Size – 20"w X 30"h is the size for the duct opening measurement only