Today the normal standards of duct systems for ventilation are air tightness class A or B. How does this correspond with the increased demand for energy efficiency presented by the European Commission? And what would be the effect if we raise the standards to class C or even class D?
As an attempt to answer these questions we have gathered information from different sources and put together this report.
Information about air tightness discussing a raise of standards against the background of increased global demands for energy efficiency.