12"W X 8"H [Duct Opening] Linear Aluminum Clip-On Bar Return Air Grille [Outer Dimensions: 13.25"W x 9.25"H] Copper Coil + Product Details Size –

+ Product Details Size – 28"w X 14"h is the size for the duct opening measurement only

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please note that the total outer dimensions of the grille measure 16" in diameter

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12"W X 8"H [Duct Opening] Linear Aluminum Clip-On Bar Return Air Grille [Outer Dimensions: 13.25"W x 9.25"H] Copper Coil + Product Details Size –+ Product Details Size 12"W X 8"H is (for duct opening measurement only); actual front end outer dimensions are 13. 25" Width X 9. 25" Height. Design Designed for concealed, flush placement on your wall with a 3 8 inch space between louvers, this linear grille comes with an installation frame and clips for easy hook in assembly, ensuring a refined and seamless look. High Quality Aluminum The premium durable aluminum will never rust and it will never