CCF consist of two glass layers, an inner insulating glass unit and an outer single glass layer, which are separated by a fully sealed cavity in between. The completely sealed cavity protects the inner glazing surface from dust and dirt and it allows using high selective and adaptive shading devices with a maximum of light transmission and a minimum of energy transmission.
However, in order avoid condensation on the outer glass layer the sealed cavities in each individual façade element must be fed with a constant supply of purified and dried air. As the cavity is fully sealed by silicone glue and not openable, maintenance or replacement in case of failure of one component (e.g. shading devices, air supply system) is extremely difficult and the economic risk for the façade contractor is extremely high.
The objective of this feasability study is to search for technologies, which enable to combine the advantages of a CCF and at the same time allow an easy maintenance resulting in a low economical risk for the contractor and the client.