The U-value (also known as the heat transfer coefficient) describes how well a building element (e.g. windows or doors) conducts heat. It is given in watts per square meter and Kelvin (W/m²K). A low U-value means better thermal insulation. Modern windows often have a Uw value of 0.8 to 1.3 W/m²K, while older windows can have significantly higher values. This value is crucial for energy efficiency and living comfort. With this FlussPool, we have achieved a U-value of approx. 0.3 W/m2K. Find out more about raised floor technology here.