Air terminal devices: Aerodynamic testing and rating at low velocity (NT VVS 083)

Abstract

  This method describes laboratory aerodynamic testing and rating of Low Velocity Air Terminal Devices (ATDs) for displacement flow applications, including the specification of suitable test facilities and measurement techniques. Further, this method describes a way of reporting the velocity characteristics, enabling manual or computerized interpolation for any reasonable combination of supply air flow rate, air temperature, and any size of ATD belonging to a series of geometrically identical low velocity ATDs.