United McGill Corp.'s (Groveport, OH) Duct-D-Fuser air diffusion product line is designed for exposed hvac air distribution systems in large, open-area commercial and industrial facilities. One key feature of the Type A air diffuser is its flush-mounting capability to curved or flat surfaces to provide directional throw airflow performance characteristics. Features of the Type A framed grille include construction from light-gauge, cold-rolled steel; field or factory installation; and 31 standard sizes with arc lengths of 4 to 30 in.