Thermal efficiency has never been more important. Therefore, you need to make sure you get the most of your home improvement investment. In order to this it is essential that you can get to grips with Window Energy Ratings.
Window Energy Ratings (WER) were created to offer reliable, relevant and easy to understand information. They measure the total performance of windows rather than the traditional measure of U-value.
With the Window Energy Ratings, WER system, ‘A+’ is the highest and ‘G’ is the lowest performing window for energy efficiency. To summarise this is similar to the ratings that you find on domestic appliances such as washing machines.