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Historical
ANSI/ASHRAE 68-1997 (ANSI/AMCA 330-97)
Laboratory Method of Testing to Determine the Sound Power in a Duct
Determines, by test, the sound power radiated into an anechoically terminated duct on the supply and/or return side of air-handling equipment. Examples of equipment include centrifugal fans, axial-flow fans, mixed-flow fans, air-handling units, unitary equipment, furnaces, dampers, and throttling devices. Dual units of measurement.
CONTENT PROVIDER
American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc. [ashrae]
American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc. [ashrae]