All MBC homes come with excellent levels of air tightness as standard, Passivhaus however, takes this to a whole new level! The requirement for a Passive House is 0.6 ACPH (Air Changes per Hour) which is guaranteed with our Passive Standard system. The MBC High Performance system offers industry-leading air tightness, complemented by the option to integrate MVHR systems—an invaluable advantage in constructing a truly airtight home.