US • SMACNA HVAC Air Duct Leakage
Europe • BS EN 12237:2003 12237:2003 – Circular Ductwork Circular Ductwork
• BS EN 1507:2006 – Rectangular Ductwork
• DW/143 (HVAC—A practical guide to Ductwork leakage testing)
• Eurovent 2/2 (Air leakage rate in sheet metal air distribution systems)