14" X 12" [Duct Opening] 1-Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 15.75"W X 13.75"H] w32h32 + Product Details Size – MFACRA88W1 Condensate Pump Product Details Size 20
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14" X 12" [Duct Opening] 1 Way Fixed Curved Blade Air Supply Diffuser Register Vent Cover Grille [Outer Dimensions: 15.75"W X 13.75"H] w32h32 + Product Details Size – MFACRA88W1 Condensate Pump Product Details Size 20 + Product Details Size – 18"w X 32"h is the size for the duct opening measurement only If your duct opening is 14 inches in diameter