24"W X 8"H [Duct Opening] 3-Way Aluminum Curved Blade Adjustable Air Supply HVAC Diffuser [Outer Dimensions: 25.75"W X 9.75"H] 12" Diameter accordion dd ul li {

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Actual Filter Size – 29 3/4"w x 27 3/4" x 1"

fasten the edges to studs with the provided screws

Actual Filter Size – 17 3/4"w x 25 3/4" x 1"

24"W X 8"H [Duct Opening] 3-Way Aluminum Curved Blade Adjustable Air Supply HVAC Diffuser [Outer Dimensions: 25.75"W X 9.75"H] 12" Diameter accordion dd ul li {+ Product Details Size 24"w X 8"h is the size for the duct opening measurement only, actual front end outer dimensions are 25. 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