36"W X 4"H [Duct Opening] Linear Aluminum Clip-On Bar Return Air Grille [Outer Dimensions: 37.25"W x 5.25"H] Brown + Product Details Size -

+ Product Details Size - 18"w X 32"h X 2"d (for duct opening measurement only)

Actual Filter Size – 19 3/4"w x 23 3/4" x 1"

this grill will provide the design aesthetic you're looking for

+ Product Details Size - 30"w X 16"h X 2"d (for duct opening measurement only)

HVAC systems

36"W X 4"H [Duct Opening] Linear Aluminum Clip-On Bar Return Air Grille [Outer Dimensions: 37.25"W x 5.25"H] Brown + Product Details Size -+ Product Details Size 36"W X 4"H is (for duct opening measurement only); actual front end outer dimensions are 37. 25" Width X 5. 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