The Radial Vane Diffuser with HEPA Filter (RVDC) features radial slots that provide a high induction votex airflow that projects horizontally from the face of the diffuser. The resulting airflow provides rapid mixing of supply air with the room air and short throws, allowing large quantities of air to be introduced while maintaining thermal comfort. The rapid mixing of filtered supply air with the room air reduces particle concentration and is ideal for cleanrooms.