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. See also Duct (HVAC) Pressurisation ductwork External links Building Engineer Word Press Treatise Turning Vane and Rail Construction Patent #US 3381713 A Heating, ventilation, and air conditioning