14"W X 12"H [Duct Opening] 3-Way Aluminum Curved Blade Adjustable Air Supply HVAC Diffuser [Outer Dimensions: 15.75"W X 13.75"H] Round Damper Ring The total outer size of

The total outer size of this grille is the listed size plus 2

75" width X 37

very easy to do

+ Product Details Size – 22"w X 30"h 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

14"W X 12"H [Duct Opening] 3-Way Aluminum Curved Blade Adjustable Air Supply HVAC Diffuser [Outer Dimensions: 15.75"W X 13.75"H] Round Damper Ring The total outer size of+ Product Details Size 14"w X 12"h is the size for the duct opening measurement only, actual front end outer dimensions are 15. 75" width X 13. 75" height. Design Individually adjusting curved blades. Multi shutter damper with handle operator to adjust air flow. Screws Included High Quality Aluminum The premium durable aluminum will never rust and it will never wear through leaving the material with an elegant, beautiful, and smooth surface, adds a