Window Energy Ratings
The EU energy label was introduced in 1995 and is designed to show consumers the energy efficiency of a product. Each product has a performance rating A-G and this has been successfully applied to white goods (fridges,washing machines etc)
Window energy ratings labels
Inline with reducing the UK’s carbon foot print it has been decided that windows can adopt energy labelling. Previous to WER the glass sealed unit had an insulation value or U value which did not take into account the window frame, the energy rating label now applies to the whole window including glass.
From October 2010 all replacement windows must have a minimum of a C energy rating under revised building regulations.