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ASHRAE 120-1999
M00003391
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ASHRAE 120-1999 Standard 120-1999 -- Method of Testing to Determine Flow Resistance of HVAC Ducts and Fittings (ANSI Approved)
standard by ASHRAE, 2001
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This standard establishes uniform methods of laboratory testing of HVAC ducts and fittings to determine their resistance to airflow.
Units: Dual