20" X 20" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged - [Outer Dimensions: 22 5/8" X 22 5/8"] sidewall Actual Filter Size – 23

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

Installation Location – Ceiling

Actual Filter Size – 29 3/4"w x 23 3/4" x 1"

Complies with industry standards of USA: ASTM D-882

20" X 20" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged - [Outer Dimensions: 22 5/8" X 22 5/8"] sidewall Actual Filter Size – 23+ Product Details Size 20"w X 20"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 22 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