In Germany, there are many older buildings that have not yet been updated with energy-saving measures. Failing to replace old windows not only harms the climate unnecessarily, but also means that heating bills are often much higher than they should be. Nearly 45% of a building’s heating energy is lost through old windows alone – even though they make up just 10% of the building envelope. So it is worth investing in modern PVC windows.

Our energy saving calculator lets you find out very easily how much you could save. The calculator uses information about the type of heating, current fuel costs, window area and other factors to work out how much CO₂ and money you could save with new PVC windows.