Aero-Dyne manufactures the High Efficiency Profile (H-E-P) Turning Vane and Rail System. The superior airfoil contour reduces generated sound power levels and relative pressure loss to their lowest attainable levels. No other product provides comparable quality, structural integrity and performance. Made in the USA designed specifically for use in square duct with velocities between 1500 and 2500 fpm. H-E-P provides maximum turning efficiency and the precise aerodynamic design allows the greatest steadiness of airflow through the cascades; eliminates breakaway of flow from surfaces on suction side; provides velocity distribution to its greatest possible uniformity; and maintains a consistently high-degree of deflection accuracy. For 40 years, consulting engineers and contractors have specified High Efficiency Profile Turning Vanes & Rail. Unmatched Performance is why Aero-Dyne H-E-P was specified and installed: Auburn (CASIC) Research Park Auburn, AL Benaroya Hall - Seattle, WA Brookhaven Laboratory Long Island NY Houston Methodist West Hospital Houston, TX Whatcom Museum, Lightcatcher Bellingham, WA Nemours Childrens Hospital Orlando, FL Princeton Jadwin Hall Princeton, NJ St. Marks Lone Peak Hospital Draper, UT Tullio Arena Erie, PA UW Chamberlin Hall Laser Lab - Madison, WI Email [email protected] for a Free Engineer's Kit.