36" X 20" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged - [Outer Dimensions: 38 5/8" X 22 5/8"] w24h24 + Product Details Size –

+ Product Details Size – 20"w X 6"h is the size for the duct opening measurement only

Operating temperature from -40°f to +248°f [-40°c to +120°c]

actual front end outer dimensions are approximately 22 5/8" width X 20 5/8" height -

+ Product Details Size - 4"w X 34"h is the size for the duct opening measurement only

36" X 20" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged - [Outer Dimensions: 38 5/8" X 22 5/8"] w24h24 + Product Details Size –+ Product Details Size 36"w X 20"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 38 5 8" width X 22 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