In Korneuburg, Austria a newly constructed two-family passive house was chosen as one of the pilot systems. The house will be referred to as "System Korneuburg” in the paper. The pilot system for Germany is located in Lahntal near Marburg and is a retrofitting project. This system is called "System Lahntal” in the paper. Both systems have been realised with direct integrated fagade collectors, which means that there is no ventilated air gap between collector backside and the adjacent wall.

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Calculations for both systems have been made regarding the moisture and heat transfer through the wall constructions to find out whether the wall constructions are suitable for an integration of non-ventilated fagade collectors or not. Also the question of a connection of the collectors onto the wall with as few thermal bridges as possible has been investigated and answered. To evaluate the calculations, the relative humidities and temperatures of the ambient and within the wall constructions have been monitored and analysed.