14" X 4" [Duct Opening] 1-Way Air Vent Adjustable Aluminum Curved Blades Integral Multi-Shutter Damper HVAC Diffuser [Outer Dimensions: 15.75"W X 5.75"H] 18in diameter and sound level range of Product Details Size 14 RG1612AL Height_16in

and sound level range of NC 25 to 35

actual front end outer dimensions are approximately 22 5/8" width X 38 5/8" height

And One Towards The Bottom Of The Door

+ Product Details Size – 26"w X 14"h is the size for the duct opening measurement only

Actual Filter Size – 24 3/4"w x 24 3/4" x 1"

14" X 4" [Duct Opening] 1 Way Air Vent Adjustable Aluminum Curved Blades Integral Multi Shutter Damper HVAC Diffuser [Outer Dimensions: 15.75"W X 5.75"H] 18in diameter and sound level range of Product Details Size 14 RG1612AL Height_16in and sound level range of NC 25 to 35 actual front end outer dimensions are approximately 22 5 8" width X 38 5 8" height