Coupled windows in the current guise
Principles of construction for improving thermal insulation and for preventing condensation
The Energy Performance of Buildings Directive (EBPD) 2010 of the EU for new constructions until end 2018 requires the lowest energy performance of buildings standard (nearly zero energy buildings), which is being implemented nationally by the more stringent requirements of the Energy Saving Regulations (EnEV) of 2016. Coupled windows are an optimal option for meeting the more stringent requirements for heat protection in summer and thermal insulation in winter equally. Coupled windows consist of two casement frames with an air space between in which the solar shading can be integrated such that it is protected against weather. The advantage compared to fittings in the inter-pane cavity is that you can separate the two sashes easily in order to clean, maintain or replace the solar shading and anti-glare elements. Moreover, you can also integrate systems for regenerative energy utilisation, e.g. photovoltaic elements. Coupled windows are suitable for maintaining historical urban patterns since the inner sash meets the requirements for heat and sound insulation and the outer sash can be executed according to design specifications. This is why the majority of system providers offer coupled windows and they are a good opportunity for metal builders to offer high-performance systems including solar/glare protection for high-quality public buildings or commercial properties.
The complete text incl. pictures is available for downloading as PDF file.