12" X 12" [Duct Opening] 3-Way Air Vent Adjustable Aluminum Curved Blades Integral Multi-Shutter Damper HVAC Diffuser [Outer Dimensions: 13.75"W X 13.75"H] Fixed Blades with Damper The installation process is a 4 X 12 Is CRFG2028 Width_14in
Yard notes & kiln story
Description
12" X 12" [Duct Opening] 3 Way Air Vent Adjustable Aluminum Curved Blades Integral Multi Shutter Damper HVAC Diffuser [Outer Dimensions: 13.75"W X 13.75"H] Fixed Blades with Damper The installation process is a 4 X 12 Is CRFG2028 Width_14in The installation process is a breeze + Product Details Size 10"w X 30"h is the size for the duct opening measurement only