12"W X 8"H [Duct Opening] 3-Way Aluminum Curved Blade Adjustable Air Supply HVAC Diffuser [Outer Dimensions: 13.75"W X 9.75"H] Aluminum Bar addEventListener('click'

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+ Product Details Size – 36"w X 28"h is the size for the duct opening measurement only

Every grille has a front end frame that will overlap at the wall joint

+ Product Details Size - 20"w X 34"h is the size for the duct opening measurement only

Design – This airflow control component are made to connect to HVAC diffuser and restrict airflow

12"W X 8"H [Duct Opening] 3-Way Aluminum Curved Blade Adjustable Air Supply HVAC Diffuser [Outer Dimensions: 13.75"W X 9.75"H] Aluminum Bar addEventListener('click'+ Product Details Size 12"w X 8"h is the size for the duct opening measurement only, actual front end outer dimensions are 13. 75" width X 9. 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