22"W X 14"H [Duct Opening] Steel Air Vent Return Grille - HVAC VENT DUCT COVER DIFFUSER - [Outer Dimensions: 23.75"W X 15.75"H] w14h14 + Product Details Size – 4 X 12 Is CRFG2028 Width_14in

+ Product Details Size – 6" x 24" or 24" x 6" is the size for the duct opening measurement only

+ Product Details Size – 36"w X 8"h is the size for the duct opening measurement only

closest('dt')

+ Product Details Size – 12"w X 24"h is the size for the duct opening measurement only

much more than required 700 PSI for R410

22"W X 14"H [Duct Opening] Steel Air Vent Return Grille HVAC VENT DUCT COVER DIFFUSER [Outer Dimensions: 23.75"W X 15.75"H] w14h14 + Product Details Size – 4 X 12 Is CRFG2028 Width_14in + Product Details Size – 6" x 24" or 24" x 6" is the size for the duct opening measurement only + Product Details Size – 36"w X 8"h is the size for the duct opening measurement only