12" X 8" [Duct Opening] 1-Way Air Vent Adjustable Aluminum Curved Blades Integral Multi-Shutter Damper HVAC Diffuser [Outer Dimensions: 13.75"W X 9.75"H] 8in diameter actual front end outer dimensions RG2230 HP w4h4 const modal document

actual front end outer dimensions are approximately 36 5/8" width X 18 5/8" height

75" width X 29

Weather and Pest Proof – These louvers are especially designed to prevent water from entering your home

Mounted with frame and bayonet joint which are included

+ Product Details Size - 12"w X 30"h is the size for the duct opening measurement only

12" X 8" [Duct Opening] 1 Way Air Vent Adjustable Aluminum Curved Blades Integral Multi Shutter Damper HVAC Diffuser [Outer Dimensions: 13.75"W X 9.75"H] 8in diameter actual front end outer dimensions RG2230 HP w4h4 const modal document actual front end outer dimensions are approximately 36 5 8" width X 18 5 8" height 75" width X 29