24" X 6" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged - [Outer Dimensions: 26 5/8" X 8 5/8"] w8h8 actual front end outer dimensions

actual front end outer dimensions are approximately 31

+ Product Details Size - 6"w X 18"h is the size for the duct opening measurement only

+ Product Details Size - 4"w X 28"h is the size for the duct opening measurement only

1/2" White insulation will give you a good R value of 3

24" X 6" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged - [Outer Dimensions: 26 5/8" X 8 5/8"] w8h8 actual front end outer dimensions+ Product Details Size 24"w X 6"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 26 5 8" width X 8 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