Accepts a 18" X 18" X 1" filter Suitable for ceiling or wall applications.
Overlapping Mitered Corners with EDP White Finish on All Surfaces Recessed Operating Lever Includes White Hex Head Screws Ensures Strong, Smooth Corner Joints that Will Not Separate Corrosion Resistance with No Exposed Metal Surfaces Lever is Protected from Damage Through Final Installation Convenient and Easy Installation with a Finished Appearance. Steel Construction.
NOTE: ORDER ALL RETURN AIR GRILLS BY INSIDE DIMENSION OF WALL OPENING
OR ORDER BY YOUR FILTER SIZE IF YOU HAVE AN EXISTING GRILL
THE FIRST NUMBER IS ALWAYS THE WIDTH THE SECOND IS THE HEIGHT.
EXAMPLE: A 18" X 18" FILTER BACK RETURN AIR GRILL IS 18" WIDE AND 18" TALL