10"W X 20"H [Duct Opening] Steel Air Vent Return Grille - HVAC VENT DUCT COVER DIFFUSER - [Outer Dimensions: 11.75"W X 21.75"H] Aluminum - Cube Core + Product Details Size - Ducting Components RG2016 FBA-HP Applications The C box

+ Product Details Size - 36"w X 28"h X 2"d (for duct opening measurement only)

actual front end outer dimensions are approximately 19

+ Product Details Size – 12"w X 10"h is the size for the duct opening measurement only

+ Product Details Size – 12"w X 4"h is the size for the duct opening measurement only

This ensures superior performance and efficiency in any application

10"W X 20"H [Duct Opening] Steel Air Vent Return Grille HVAC VENT DUCT COVER DIFFUSER [Outer Dimensions: 11.75"W X 21.75"H] Aluminum Cube Core + Product Details Size Ducting Components RG2016 FBA HP Applications The C box + Product Details Size 36"w X 28"h X 2"d (for duct opening measurement only) actual front end outer dimensions are approximately 19