36"W X 8"H [Duct Opening] Linear Aluminum Clip-On Bar Return Air Grille [Outer Dimensions: 37.25"W x 9.25"H] Sheet Metal / Round Duct + Product Details Size –

+ Product Details Size – 36"w X 22"h is the size for the duct opening measurement only

What does this mean

The MERV 2 rating of our furnace accessory is proof enough of how much air flows through the filter itself

It is compatible with 8" duct

36"W X 8"H [Duct Opening] Linear Aluminum Clip-On Bar Return Air Grille [Outer Dimensions: 37.25"W x 9.25"H] Sheet Metal / Round Duct + Product Details Size –+ Product Details Size 36"W X 8"H is (for duct opening measurement only); actual front end outer dimensions are 37. 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