Our concentric diffusers are the only ones made in the industry that are designed for maximum airflow. RRS is the only manufacturer that provides a molded transition for our small (2-5 ton) diffusers, and a supply-thru-return duct on our larger diffusers. We go to this length to insure proper airflow. While other manufacturers have problems delivering air to all four sides of a concentric, we do not.

Our specialty diffusers are used in areas where concentric diffusers do not fit the design requirements. We can construct them to the particular needs of a National Account, or for a special job situation.