10" X 10" [Duct Opening] 4-Way Air Vent Adjustable Aluminum Curved Blades Integral Multi-Shutter Damper HVAC Diffuser [Outer Dimensions: 11.75"W X 11.75"H] 6in diameter + Product Details Size - 4 X 12 Is CRFG2028 Width_14in
Yard notes & kiln story
Description
+ Product Details Size - 20"w X 25"h is the size for the duct opening measurement only
Actual Filter Size – 23 3/4"w x 31 3/4" x 1"
with no sharp edges to worry about
Width vs Height:
lightweight aluminum
10" X 10" [Duct Opening] 4 Way Air Vent Adjustable Aluminum Curved Blades Integral Multi Shutter Damper HVAC Diffuser [Outer Dimensions: 11.75"W X 11.75"H] 6in diameter + Product Details Size 4 X 12 Is CRFG2028 Width_14in + Product Details Size 20"w X 25"h is the size for the duct opening measurement only Actual Filter Size – 23 3 4"w x 31 3 4" x 1"