18" X 18" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged - [Outer Dimensions: 20 5/8" X 20 5/8"] Brown providing efficient performance of up

providing efficient performance of up to 300m3/h

+ Product Details Size - 14"w X 22"h is the size for the duct opening measurement only

+How To Measure A Grille Overall Size:

+ Product Details Size - 30"w X 26"h is the size for the duct opening measurement only

+ Product Details Size - 18"w X 28"h is the size for the duct opening measurement only

18" X 18" Steel Return Air Filter Grille for 1" Filter - Fixed Hinged - [Outer Dimensions: 20 5/8" X 20 5/8"] Brown providing efficient performance of up+ Product Details Size 18"w X 18"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 20 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