Proper evaluation of ventilation system energy efficiency involves conducting leakage tests to identify any potential issues. Air duct leakages can result in unregulated airflow, noise, heat loss, and the introduction of contaminants.
The tightness classes apply to the assembled air duct system as well as to individual components.
For component tests, the classification and testing of tightness is described in the following BS standards:
·· BS EN 12237 for round air ducts
·· BS EN 1507 for rectangular air ducts
·· BS EN 13180 for flexible air ducts
·· BS EN 1751 for throttle and shut-off elements
·· BS EN 13403 for non-metallic air ducts made of insulation boards
·· BS EN 15727 for components not covered by the other standards