WT38 linear slot diffuser offers a truly discrete appearance for the discerning interior designer which blends into it’s surroundings perfectly offering a unique high quality and subtle appearance. WT38 can be installed in walls or bulkheads for vertical discharge with directional supply. WT38 can be used for supply and extract. Various flange options are available including surface-mount with either 25mm or 32mm flanges. The plaster-in frame offers the most discrete mounting option with only the air gap visible when fully installed.