24" X 18" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged - [Outer Dimensions: 26 5/8" X 20 5/8"] Fixed Blades Insulation – A thick blanket

Insulation – A thick blanket of fiberglass insulation provides you with an R-Value of 4

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

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24" X 18" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged - [Outer Dimensions: 26 5/8" X 20 5/8"] Fixed Blades Insulation – A thick blanket+ Product Details Size 24"w X 18"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 26 5 8" width X 20 5 8" height. High Quality high quality solid stamped steel with counter sunk screw holes (screws included) and no sharp edges Installation Location Ceiling Design Fixed hinged for easy filter change & cleaning uses a 1" thick filter. Our filter grille latch is easy to use on your fingers and