16" X 24" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged - [Outer Dimensions: 18 5/8" X 26 5/8"] Adjustable Return actual front end outer dimensions 4 X 12 Is CRFG2028 Width_14in

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

+ Product Details Size - 4"w X 22"h is the size for the duct opening measurement only

+ Product Details Size – 8" x 30" or 30" x 8" is the size for the duct opening measurement only

much more than required 700 PSI for R410

this flex duct decreases the pressure loss and provides a more hygienic environment

16" X 24" Steel Return Air Filter Grille for 1" Filter Fixed Hinged [Outer Dimensions: 18 5 8" X 26 5 8"] Adjustable Return actual front end outer dimensions 4 X 12 Is CRFG2028 Width_14in actual front end outer dimensions are approximately 22 5 8" width X 22 5 8" height + Product Details Size 4"w X 22"h is the size for the duct opening measurement only