Turning vanes (HVAC)

HVAC turning vanes are sheet metal devices inside of mechanical ductwork used to smoothly direct air inside a duct where there is a change in direction, by reducing resistance and turbulence. Gordon R. Jacobsen, a West Point graduate, originally invented the product to address the problem engineers faced with airflow deficiencies and noisy duct systems. Jacobsen applied for and was granted Patent #US3381713 A and began a company, Aero Dyne Sound Control, to manufacture and distribute his invention.