10" X 4" [Duct Opening] 3-Way Air Vent Adjustable Aluminum Curved Blades Integral Multi-Shutter Damper HVAC Diffuser [Outer Dimensions: 11.75"W X 5.75"H] w20h20 actual front end outer dimensions RFG3024 Black HP const content item Hi-Lo Oval Stack Head

actual front end outer dimensions are approximately 22" width X 16" height

Actual Filter Size – 24 3/4"w x 13 3/4" x 1"

+ Product Details Size - 34"w X 18"h is the size for the duct opening measurement only

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Actual Filter Size – 11 3/4"w x 23 3/4" x 1"

10" X 4" [Duct Opening] 3 Way Air Vent Adjustable Aluminum Curved Blades Integral Multi Shutter Damper HVAC Diffuser [Outer Dimensions: 11.75"W X 5.75"H] w20h20 actual front end outer dimensions RFG3024 Black HP const content item Hi Lo Oval Stack Head actual front end outer dimensions are approximately 22" width X 16" height Actual Filter Size – 24 3 4"w x 13 3 4" x 1"