A well insulated airtight building with mechanical inlet and extract ventilation.
Internationally, Germany is the leader regarding construction and further development of passive buildings.
Passiv House (Passivhaus)
A specific construction standard for residential buildings which have excellent comfort conditions in both winter and summer. These principles can be applied not only to the residential sector as the name suggests, but also to commercial, industrial and public buildings.
A dwelling which achieves the PassivHaus standard typically includes:
-very good levels of insulation with minimal thermal bridges
-well thought out utilisation of solar and internal gains
-an excellent level of airtightness; and
-good indoor air quality, provided by a whole house mechanical ventilation system with highly efficient heat recovery.
By specifying these features, the design heat load is limited to the load that can be transported by the minimum required ventilation air. Thus, a PassivHaus does not need a traditional heating system or active cooling to be comfortable to live in -
the small heating demand can be typically met using a compact services unit which integrates heating, hot water and ventilation in one unit (although there are a variety of alternative solutions).