44"W X 8"H [Duct Opening] Linear Aluminum Clip-On Bar Return Air Grille [Outer Dimensions: 45.25"W x 9.25"H] Drop Ceilings / Aluminum And is classified as Class

And is classified as Class 1 Fire Proof - B1

American Standard

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

This 2-pack of long-lasting blades ensures a consistent and sharp cutting experience for PEX

44"W X 8"H [Duct Opening] Linear Aluminum Clip-On Bar Return Air Grille [Outer Dimensions: 45.25"W x 9.25"H] Drop Ceilings / Aluminum And is classified as Class+ Product Details Size 44"W X 8"H is (for duct opening measurement only); actual front end outer dimensions are 45. 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