3. Ventilated curtain wall

The design is identical to that of the breathable curtain wall, except that in addition to the lower vents, there are also vents at the top, generally on the vertical side to prevent water ingress, or on the upper transom by punctual interruption of the glazing joints.

This technique complies with standard EN 13830 and DTU 33.1, and does not require a fogging test, since natural ventilation makes fogging unlikely.

In France, more and more products are breathable. In Germany, on the other hand, ventilated or even highly...