The Round Double Deflection (RDD) Grille (US PATENT) is a contemporary air distribution grille with architectural appeal. It combines versatility and the modern esthetics of a flowing circular design with superior performance and high quality.The individually adjustable front and rear blades are designed so the air stream can be adjusted from a concentrated column of air to a conical widespread diffusion pattern. The versatility of the RDD makes it suitable for applications requiring high velocity spot cooling or a dispersed airflow projection.