Building envelope permeability in residential buildings. Angepasste Luftdurchlassigkeit der Gebaudehulle bei Wohnbauten.

Resulting from experiences of a project by the German National Energy Research Foundation (NEFF), and further investigations, a recommendation is presented on the permeability of building envelopes in residential buildings, according to on hand ventilation devices. To find out the permeability, the air leakage at 50 Pa is evaluated. This can be found out with the differentiated pressure reading of the building.