20"w X 8"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 21.75"w x 9.75"h] Adjustable Return Actual Filter Size – 17 MFACRA88W1 Condensate Pump Product Details Size 20
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Description
20"w X 8"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace Weather Resistant Air Grille with Screen Mesh [Outer Dimensions 21.75"w x 9.75"h] Adjustable Return Actual Filter Size – 17 MFACRA88W1 Condensate Pump Product Details Size 20 Actual Filter Size – 17 3 4"w x 11 3 4" x 1" + Product Details Size 20"w X 12"h is the size for the duct opening measurement only