Final air tightness of 1.0 ach50 was achieved after extensive testing and leak fixing at various details, namely the joist pockets in the party walls. (nypassivehouse.org)
To put this in context, there is no current requirement for air tightness in Building Regulations / Standards in Cyprus. (ecotek.com.cy)
The continuous air barrier yields minimal leakage, with air tightness testing revealing only 0.3 ACH50 which is half the Passive House requirement. (zeroenergy.com)