The 6690 diffusers feature a perforated face with 3/16” diameter holes on 1/4” centers. The backpan is constructed of heavy gage steel with a round neck.
- Steel Face and Steel Backpan Construction
- Hinged, Removable Face with 51% Perforated Open Area
- Various Frame Styles and Panel Sizes Available
- Round Inlet Sizes
- Standard Finish is British White