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 Actual Filter Size – 24

Actual Filter Size – 24 3/4"w x 19 3/4" x 1"

very easy to do

Actual Filter Size – 33 3/4"w x 31 3/4" x 1"

actual front end outer dimensions are approximately 26 5/8" width X 28 5/8" height

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 Actual Filter Size – 24+ 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