28"W X 14"H [Duct Opening] Steel Air Vent Return Grille - HVAC VENT DUCT COVER DIFFUSER - [Outer Dimensions: 29.75"W X 15.75"H] Copper Coil-Insulated Line Set + Product Details Size - Insulation Black Foam Tape Sheet Metal/Adjustable Elbow CRG1234

+ Product Details Size - 8"w X 24"h is the size for the duct opening measurement only

+ Product Details Size - 26"w X 14"h is the size for the duct opening measurement only

The total outer size of this grille is the listed size plus 1

+ Product Details Size - 22"w X 16"h is the size for the duct opening measurement only

28"W X 14"H [Duct Opening] Steel Air Vent Return Grille HVAC VENT DUCT COVER DIFFUSER [Outer Dimensions: 29.75"W X 15.75"H] Copper Coil Insulated Line Set + Product Details Size Insulation Black Foam Tape Sheet Metal Adjustable Elbow CRG1234 + Product Details Size 8"w X 24"h is the size for the duct opening measurement only + Product Details Size 26"w X 14"h is the size for the duct opening measurement only