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 - 34"w X 6"h X 2"d (for duct opening measurement only)

Height vs Width: The first number in a floor register size

+ Product Details Size – 32" x 32" is the size for the duct opening measurement only

+ Product Details Perfect Fit & Easy Sizing - Designed for a 30" x 26" OR 26" x 30" duct opening (measured at the opening)

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