Insulation & Facades

Façade integration of collector and transparent heat insulating modules with heat insulating mouldings

The aim of the project is to enable and simplify integration of active and passive solar-thermal converters in thermal insulation composite systems by using appropriate mouldings. The mouldings can be fitted with appropriate thermal converters for the various functions as thermal collectors, hybrid façade elements or passive transparent heat insulating elements.


More than 40 million m2 of thermal insulation composite systems are installed on façades in Germany every year. This redevelopment of the building stock represents significant potential for energy savings.

As part of this project, various thermal converters are being integrated into thermal insulation composite systems to support the hot water supply and heating system in residential buildings. Compared to roof mounting, vertical alignment has a more uniform yield profile at lower yields and improved heat insulation of the collector and the building.

Large mouldings can be integrated across the entire façade system and set up as thermal collectors, hybrid façade elements or passive transparent heat insulating elements depending on the required function. The study evaluates the frame required for integrating collectors into thermal insulation composite systems in terms of heat bridge problems and heat loads.


  • The façade collectors in the demonstration system achieve significant yields even in winter.
  • The heat loss parameters show a dependency on the inclination angle and are excellent for a flat collector.
    Compared to collector integration without a heat bridge, integration with a standard frame leads to a 49 % increase in the transmission heat loss. The screw fitting raises the transmission heat loss by 54 %.
  • The frame width and the heat conductivity of the siliceous frame material are therefore critical parameters for the absorber frame compound. A minimum frame width must be maintained (50 mm) or sufficiently temperature resistant insulation fitted.
  • The relative change in transmission heat losses is largely independent of the building wall material.
  • The vertical inclination and the improved rear insulation mean that the thermal collector losses are lower than with comparable roof mounted collectors.

More Project Information

Project title: Text

Project number: 0327234

Project period: 1999 - 2004

Project region: Germany (Baden-Württemberg, Bavaria, Berlin)

Project contact::

Herr Dipl.-Phys. Zwerger

View Publication

Source: German National Library of Science and Technology Hannover (TIB)