14"W X 4"H [Duct Opening] Steel Air Vent Return Grille - HVAC VENT DUCT COVER DIFFUSER - [Outer Dimensions: 15.75"W X 5.75"H] Color_R-8.0 Pink + Product Details Size - 4 X 12 Is CRFG2028 Width_14in

+ Product Details Size - 22"w X 36"h is the size for the duct opening measurement only

Insulation – A thick blanket of fiberglass insulation provides you with an R-Value of 8

and Centralized Air Ducted Units

+ Product Details Size - 20"w X 10"h is the size for the duct opening measurement only

angle the louvers up for efficient cooling

14"W X 4"H [Duct Opening] Steel Air Vent Return Grille HVAC VENT DUCT COVER DIFFUSER [Outer Dimensions: 15.75"W X 5.75"H] Color_R 8.0 Pink + Product Details Size 4 X 12 Is CRFG2028 Width_14in + Product Details Size 22"w X 36"h is the size for the duct opening measurement only Insulation – A thick blanket of fiberglass insulation provides you with an R Value of 8