Does anyone know of a good source for high-flow return grilles for residential/commercial AC systems? These are sometimes also known as fixed-bar return grilles. I have done a bit of internet searching, and have a very few possibilities, but I just want to canvass others to see what I might be missing.
Background: Replaced home AC system with a more efficient, higher-capacity variable-speed system a couple of years ago, and existing return grille (roughly 24 x 28, open area about 19 x 23) is a stamped steel louver unit that makes a huge amount of airflow noise when closed as designed. I would like to find an off-the-shelf fix before I feel compelled to make my own.
Background: Replaced home AC system with a more efficient, higher-capacity variable-speed system a couple of years ago, and existing return grille (roughly 24 x 28, open area about 19 x 23) is a stamped steel louver unit that makes a huge amount of airflow noise when closed as designed. I would like to find an off-the-shelf fix before I feel compelled to make my own.