Uw is one of the most important indicators of energy performance in window and door systems. It is used to measure how well a window provides thermal insulation.

The Uw coefficient represents the amount of heat that passes through a window or door. The lower the Uw value,the better the thermal insulation of the system. This means that the window helps maintain indoor temperature and reduces energy loss.

The calculation of Uw does not depend only on the window profile but is also influenced by several factors, such as:

• the type of glazing
• the materials of the system
• the dimensions of the construction
• the technical characteristics of the profiles

Accurate Uw calculation is essential for the energy performance of a building. Windows with low Uw values help reduce energy consumption for heating and cooling, improving the overall energy efficiency of the property.

At the same time, the Uw value is a key element in the certifications that accompany window systems and is necessary for the technical documentation of every project.

To ensure reliable Uw calculations, they must be performed using specialized and certified software. This guarantees the accuracy of the results and proper technical documentation.

Using the right tools allows manufacturers to provide clear and reliable data on the energy performance of their products and to meet the requirements of the modern construction market.