20" X 20" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 21.75 X 21.75] Width_22in + Product Details Size –

+ Product Details Size – 28"w X 28"h is the size for the duct opening measurement only

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Sound Rated – Felt covered access panel door with soundproof material on the inside reduces noise with a reduction index of 30 – Enjoy having an access door without sacrificing peace and quiet

+ Product Details Size - 24"w X 8"h Is The Size For The Duct Opening Measurement Only

+ How To Measure A Round Vent Overall Size:

20" X 20" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 21.75 X 21.75] Width_22in + Product Details Size –+ Product Details Size 20"w X 20"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 21. 75" width X 21. 75" height. High Quality High grade steel construction meant for high foot traffic areas. Installation Location Floor. Design Easy drop in installation. Powder Coat Finish Smooth, shiny, scratch resistant, with no sharp edges. Looks like it was just waxed. Quality Packaging Carefully shrink